./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi009_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi009_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi009_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:44:56,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:44:56,623 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:44:56,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:44:56,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:44:56,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:44:56,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:44:56,650 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:44:56,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:44:56,654 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:44:56,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:44:56,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:44:56,655 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:44:56,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:44:56,655 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:44:56,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:44:56,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:44:56,656 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:44:56,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:44:56,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:44:56,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:44:56,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:44:56,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:44:56,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:44:56,658 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:44:56,658 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:44:56,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:44:56,658 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:44:56,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:44:56,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:44:56,659 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:44:56,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:44:56,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:44:56,659 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:44:56,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:44:56,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:44:56,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:44:56,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:44:56,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:44:56,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:44:56,661 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:44:56,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:44:56,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:44:56,661 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:44:56,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:44:56,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:44:56,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:44:56,823 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:44:56,824 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:44:56,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi009_rmo.oepc.yml/witness.yml [2024-06-28 03:44:57,049 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:44:57,049 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:44:57,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_rmo.oepc.i [2024-06-28 03:44:58,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:44:58,415 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:44:58,418 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_rmo.oepc.i [2024-06-28 03:44:58,428 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03751d737/b67cc8f7988a4c80badb62319c9f7a9c/FLAG29d204078 [2024-06-28 03:44:58,437 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03751d737/b67cc8f7988a4c80badb62319c9f7a9c [2024-06-28 03:44:58,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:44:58,438 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:44:58,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:44:58,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:44:58,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:44:58,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:44:57" (1/2) ... [2024-06-28 03:44:58,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a688cda and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:44:58, skipping insertion in model container [2024-06-28 03:44:58,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:44:57" (1/2) ... [2024-06-28 03:44:58,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b4615db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:44:58, skipping insertion in model container [2024-06-28 03:44:58,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:44:58" (2/2) ... [2024-06-28 03:44:58,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a688cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:58, skipping insertion in model container [2024-06-28 03:44:58,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:44:58" (2/2) ... [2024-06-28 03:44:58,446 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:44:58,557 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:44:58,558 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:44:58,559 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:44:58,559 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:44:58,559 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:44:58,559 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-28 03:44:58,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:44:58,915 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:44:58,924 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:44:59,095 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:44:59,134 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:44:59,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59 WrapperNode [2024-06-28 03:44:59,135 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:44:59,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:44:59,136 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:44:59,136 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:44:59,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,213 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-28 03:44:59,218 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:44:59,219 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:44:59,219 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:44:59,219 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:44:59,228 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,232 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,255 INFO L175 MemorySlicer]: Split 45 memory accesses to 2 slices as follows [2, 43]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-28 03:44:59,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,280 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,282 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,284 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,285 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:44:59,289 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:44:59,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:44:59,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:44:59,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (1/1) ... [2024-06-28 03:44:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:44:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:44:59,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 03:44:59,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 03:44:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:44:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:44:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:44:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:44:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:44:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:44:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:44:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:44:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:44:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:44:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:44:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:44:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:44:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:44:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:44:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:44:59,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:44:59,356 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:44:59,544 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:44:59,545 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:44:59,883 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:44:59,884 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:45:00,196 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:45:00,197 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:45:00,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:45:00 BoogieIcfgContainer [2024-06-28 03:45:00,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:45:00,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:45:00,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:45:00,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:45:00,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:44:57" (1/4) ... [2024-06-28 03:45:00,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a475fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:45:00, skipping insertion in model container [2024-06-28 03:45:00,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:44:58" (2/4) ... [2024-06-28 03:45:00,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a475fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:45:00, skipping insertion in model container [2024-06-28 03:45:00,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:44:59" (3/4) ... [2024-06-28 03:45:00,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a475fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:45:00, skipping insertion in model container [2024-06-28 03:45:00,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:45:00" (4/4) ... [2024-06-28 03:45:00,204 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_rmo.oepc.i [2024-06-28 03:45:00,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:45:00,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:45:00,220 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:45:00,277 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:45:00,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:45:00,345 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:45:00,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:45:00,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:45:00,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:45:00,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:45:00,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:45:00,370 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;@187f94c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:45:00,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:45:00,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:45:00,375 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:45:00,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:45:00,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:00,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:45:00,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:00,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:00,383 INFO L85 PathProgramCache]: Analyzing trace with hash 722375140, now seen corresponding path program 1 times [2024-06-28 03:45:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:00,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792497681] [2024-06-28 03:45:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:02,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:02,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792497681] [2024-06-28 03:45:02,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792497681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:02,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:02,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:45:02,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499409968] [2024-06-28 03:45:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:02,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:45:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:45:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:45:02,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 03:45:02,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:02,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:02,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 03:45:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:02,521 INFO L124 PetriNetUnfolderBase]: 770/1260 cut-off events. [2024-06-28 03:45:02,521 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 03:45:02,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 1260 events. 770/1260 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6312 event pairs, 479 based on Foata normal form. 1/1231 useless extension candidates. Maximal degree in co-relation 2491. Up to 1178 conditions per place. [2024-06-28 03:45:02,532 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 03:45:02,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-28 03:45:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:45:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:45:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-28 03:45:02,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-28 03:45:02,544 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-28 03:45:02,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-28 03:45:02,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:02,549 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:45:02,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:45:02,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:45:02,555 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:45:02,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:45:02,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:02,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1581946059, now seen corresponding path program 1 times [2024-06-28 03:45:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755607797] [2024-06-28 03:45:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:04,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:04,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755607797] [2024-06-28 03:45:04,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755607797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:04,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:04,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:45:04,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515705357] [2024-06-28 03:45:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:04,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:45:04,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:45:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:45:04,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 03:45:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 03:45:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:04,996 INFO L124 PetriNetUnfolderBase]: 764/1255 cut-off events. [2024-06-28 03:45:04,996 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2024-06-28 03:45:04,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1255 events. 764/1255 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6262 event pairs, 369 based on Foata normal form. 3/1255 useless extension candidates. Maximal degree in co-relation 2849. Up to 1150 conditions per place. [2024-06-28 03:45:05,003 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-28 03:45:05,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-28 03:45:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:45:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:45:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-28 03:45:05,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 03:45:05,006 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-28 03:45:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-28 03:45:05,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:45:05,008 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:45:05,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:45:05,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:45:05,009 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:45:05,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:05,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:05,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:05,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:45:05,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:05,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash 922539191, now seen corresponding path program 1 times [2024-06-28 03:45:05,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:05,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644097287] [2024-06-28 03:45:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:05,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:07,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644097287] [2024-06-28 03:45:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644097287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:07,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:07,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:45:07,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209473098] [2024-06-28 03:45:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:07,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:45:07,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:45:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:45:07,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:45:07,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:07,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:07,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:45:07,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:08,345 INFO L124 PetriNetUnfolderBase]: 969/1554 cut-off events. [2024-06-28 03:45:08,346 INFO L125 PetriNetUnfolderBase]: For 831/831 co-relation queries the response was YES. [2024-06-28 03:45:08,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1554 events. 969/1554 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7534 event pairs, 305 based on Foata normal form. 6/1554 useless extension candidates. Maximal degree in co-relation 3929. Up to 1394 conditions per place. [2024-06-28 03:45:08,354 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-28 03:45:08,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-28 03:45:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:45:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:45:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-28 03:45:08,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 03:45:08,356 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-28 03:45:08,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-28 03:45:08,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 03:45:08,358 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-28 03:45:08,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 03:45:08,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 03:45:08,359 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-28 03:45:08,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:08,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:08,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:45:08,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:08,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1307412308, now seen corresponding path program 1 times [2024-06-28 03:45:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172209468] [2024-06-28 03:45:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:09,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172209468] [2024-06-28 03:45:09,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172209468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:09,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:09,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:45:09,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993176084] [2024-06-28 03:45:09,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:09,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:45:09,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:45:09,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:45:09,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:09,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:09,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:10,597 INFO L124 PetriNetUnfolderBase]: 1179/1832 cut-off events. [2024-06-28 03:45:10,597 INFO L125 PetriNetUnfolderBase]: For 1821/1821 co-relation queries the response was YES. [2024-06-28 03:45:10,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5132 conditions, 1832 events. 1179/1832 cut-off events. For 1821/1821 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8671 event pairs, 492 based on Foata normal form. 2/1828 useless extension candidates. Maximal degree in co-relation 5115. Up to 1767 conditions per place. [2024-06-28 03:45:10,606 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-28 03:45:10,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 339 flow [2024-06-28 03:45:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:45:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:45:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 03:45:10,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 03:45:10,609 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 89 transitions. [2024-06-28 03:45:10,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 339 flow [2024-06-28 03:45:10,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 312 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:10,614 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-28 03:45:10,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 03:45:10,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 03:45:10,615 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-28 03:45:10,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:10,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:10,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:45:10,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:10,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1875074485, now seen corresponding path program 1 times [2024-06-28 03:45:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136325563] [2024-06-28 03:45:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:12,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:12,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136325563] [2024-06-28 03:45:12,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136325563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:12,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:12,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:45:12,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442414951] [2024-06-28 03:45:12,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:12,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:45:12,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:12,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:45:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:45:12,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:12,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:12,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:12,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:12,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:13,437 INFO L124 PetriNetUnfolderBase]: 1169/1822 cut-off events. [2024-06-28 03:45:13,438 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-06-28 03:45:13,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5478 conditions, 1822 events. 1169/1822 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8555 event pairs, 462 based on Foata normal form. 4/1825 useless extension candidates. Maximal degree in co-relation 5459. Up to 1731 conditions per place. [2024-06-28 03:45:13,448 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-28 03:45:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 392 flow [2024-06-28 03:45:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:45:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:45:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:45:13,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:45:13,453 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:45:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 392 flow [2024-06-28 03:45:13,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:13,462 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-28 03:45:13,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-28 03:45:13,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 03:45:13,465 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-28 03:45:13,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:13,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:13,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:13,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:45:13,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:13,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1996512683, now seen corresponding path program 1 times [2024-06-28 03:45:13,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:13,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417724955] [2024-06-28 03:45:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:13,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417724955] [2024-06-28 03:45:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417724955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:15,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:15,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:45:15,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746528983] [2024-06-28 03:45:15,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:15,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:45:15,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:45:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:45:15,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:15,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:15,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:15,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:15,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:16,891 INFO L124 PetriNetUnfolderBase]: 1182/1838 cut-off events. [2024-06-28 03:45:16,892 INFO L125 PetriNetUnfolderBase]: For 3793/3799 co-relation queries the response was YES. [2024-06-28 03:45:16,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5986 conditions, 1838 events. 1182/1838 cut-off events. For 3793/3799 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8651 event pairs, 464 based on Foata normal form. 6/1842 useless extension candidates. Maximal degree in co-relation 5966. Up to 1729 conditions per place. [2024-06-28 03:45:16,901 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-28 03:45:16,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 502 flow [2024-06-28 03:45:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:45:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:45:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 03:45:16,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-28 03:45:16,903 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 113 transitions. [2024-06-28 03:45:16,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 502 flow [2024-06-28 03:45:16,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 472 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:45:16,908 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-28 03:45:16,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-28 03:45:16,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:45:16,910 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-28 03:45:16,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:16,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:16,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:16,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:45:16,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:16,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1241668837, now seen corresponding path program 2 times [2024-06-28 03:45:16,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:16,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209827594] [2024-06-28 03:45:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:16,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:18,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:18,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209827594] [2024-06-28 03:45:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209827594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:18,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:18,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:45:18,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488111510] [2024-06-28 03:45:18,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:45:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:45:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:45:18,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:18,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:18,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:18,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:18,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:19,938 INFO L124 PetriNetUnfolderBase]: 1177/1832 cut-off events. [2024-06-28 03:45:19,938 INFO L125 PetriNetUnfolderBase]: For 5032/5037 co-relation queries the response was YES. [2024-06-28 03:45:19,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 1832 events. 1177/1832 cut-off events. For 5032/5037 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8624 event pairs, 468 based on Foata normal form. 6/1836 useless extension candidates. Maximal degree in co-relation 6345. Up to 1724 conditions per place. [2024-06-28 03:45:19,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-28 03:45:19,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 472 flow [2024-06-28 03:45:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:45:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:45:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:45:19,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 03:45:19,949 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:45:19,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 472 flow [2024-06-28 03:45:19,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 438 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 03:45:19,953 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 294 flow [2024-06-28 03:45:19,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-28 03:45:19,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-28 03:45:19,954 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 294 flow [2024-06-28 03:45:19,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:19,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:19,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:19,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:45:19,955 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:19,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 809834350, now seen corresponding path program 1 times [2024-06-28 03:45:19,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:19,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956317743] [2024-06-28 03:45:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:19,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956317743] [2024-06-28 03:45:22,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956317743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:22,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:22,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:22,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867075748] [2024-06-28 03:45:22,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:22,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:22,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:22,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:22,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:22,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:23,837 INFO L124 PetriNetUnfolderBase]: 1235/1930 cut-off events. [2024-06-28 03:45:23,837 INFO L125 PetriNetUnfolderBase]: For 5988/5992 co-relation queries the response was YES. [2024-06-28 03:45:23,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6814 conditions, 1930 events. 1235/1930 cut-off events. For 5988/5992 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9119 event pairs, 459 based on Foata normal form. 6/1935 useless extension candidates. Maximal degree in co-relation 6791. Up to 1786 conditions per place. [2024-06-28 03:45:23,849 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-28 03:45:23,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 664 flow [2024-06-28 03:45:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:45:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:45:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:45:23,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 03:45:23,851 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 294 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:45:23,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 664 flow [2024-06-28 03:45:23,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 104 transitions, 608 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:45:23,856 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 406 flow [2024-06-28 03:45:23,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=406, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2024-06-28 03:45:23,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-28 03:45:23,857 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 406 flow [2024-06-28 03:45:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:23,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:23,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:23,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:45:23,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:23,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1933050022, now seen corresponding path program 2 times [2024-06-28 03:45:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138397882] [2024-06-28 03:45:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138397882] [2024-06-28 03:45:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138397882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:26,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173638838] [2024-06-28 03:45:26,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:26,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:26,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:26,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 406 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:26,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:26,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:26,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:27,343 INFO L124 PetriNetUnfolderBase]: 1248/1955 cut-off events. [2024-06-28 03:45:27,343 INFO L125 PetriNetUnfolderBase]: For 7779/7787 co-relation queries the response was YES. [2024-06-28 03:45:27,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7424 conditions, 1955 events. 1248/1955 cut-off events. For 7779/7787 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9284 event pairs, 444 based on Foata normal form. 10/1964 useless extension candidates. Maximal degree in co-relation 7399. Up to 1788 conditions per place. [2024-06-28 03:45:27,361 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 26 changer transitions 0/104 dead transitions. [2024-06-28 03:45:27,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 730 flow [2024-06-28 03:45:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 03:45:27,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 03:45:27,363 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 406 flow. Second operand 7 states and 129 transitions. [2024-06-28 03:45:27,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 730 flow [2024-06-28 03:45:27,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 688 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:27,370 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 465 flow [2024-06-28 03:45:27,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-28 03:45:27,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-28 03:45:27,372 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 465 flow [2024-06-28 03:45:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:27,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:27,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:45:27,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:27,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1762352428, now seen corresponding path program 1 times [2024-06-28 03:45:27,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:27,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733270052] [2024-06-28 03:45:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:27,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:29,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:29,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733270052] [2024-06-28 03:45:29,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733270052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:29,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:29,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:29,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571283532] [2024-06-28 03:45:29,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:29,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:29,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:29,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:29,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:29,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:29,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 465 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:29,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:29,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:30,996 INFO L124 PetriNetUnfolderBase]: 1274/1994 cut-off events. [2024-06-28 03:45:30,997 INFO L125 PetriNetUnfolderBase]: For 10135/10143 co-relation queries the response was YES. [2024-06-28 03:45:31,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8025 conditions, 1994 events. 1274/1994 cut-off events. For 10135/10143 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9414 event pairs, 417 based on Foata normal form. 12/2001 useless extension candidates. Maximal degree in co-relation 7999. Up to 1772 conditions per place. [2024-06-28 03:45:31,010 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 26 changer transitions 0/112 dead transitions. [2024-06-28 03:45:31,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 112 transitions, 865 flow [2024-06-28 03:45:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 03:45:31,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-28 03:45:31,012 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 465 flow. Second operand 7 states and 134 transitions. [2024-06-28 03:45:31,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 112 transitions, 865 flow [2024-06-28 03:45:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 786 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:45:31,021 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 508 flow [2024-06-28 03:45:31,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-06-28 03:45:31,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-28 03:45:31,021 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 508 flow [2024-06-28 03:45:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:31,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:45:31,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:31,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1762352242, now seen corresponding path program 3 times [2024-06-28 03:45:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:31,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875268659] [2024-06-28 03:45:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:33,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:33,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875268659] [2024-06-28 03:45:33,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875268659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:33,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:33,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922916213] [2024-06-28 03:45:33,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:33,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:33,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:33,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:33,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 508 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:33,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:33,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:33,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:34,568 INFO L124 PetriNetUnfolderBase]: 1287/2018 cut-off events. [2024-06-28 03:45:34,568 INFO L125 PetriNetUnfolderBase]: For 9947/9952 co-relation queries the response was YES. [2024-06-28 03:45:34,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8114 conditions, 2018 events. 1287/2018 cut-off events. For 9947/9952 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9599 event pairs, 445 based on Foata normal form. 4/2020 useless extension candidates. Maximal degree in co-relation 8087. Up to 1782 conditions per place. [2024-06-28 03:45:34,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 37 changer transitions 0/113 dead transitions. [2024-06-28 03:45:34,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 904 flow [2024-06-28 03:45:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:45:34,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-28 03:45:34,583 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 508 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:45:34,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 904 flow [2024-06-28 03:45:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 871 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:34,602 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 627 flow [2024-06-28 03:45:34,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-28 03:45:34,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-28 03:45:34,605 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 627 flow [2024-06-28 03:45:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:34,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:34,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:45:34,609 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:34,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash -416446744, now seen corresponding path program 2 times [2024-06-28 03:45:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:34,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841859406] [2024-06-28 03:45:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:34,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:36,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841859406] [2024-06-28 03:45:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841859406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:36,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:36,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376523107] [2024-06-28 03:45:36,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:36,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:36,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:36,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 627 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:36,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:36,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:36,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:37,997 INFO L124 PetriNetUnfolderBase]: 1313/2066 cut-off events. [2024-06-28 03:45:37,998 INFO L125 PetriNetUnfolderBase]: For 12778/12793 co-relation queries the response was YES. [2024-06-28 03:45:38,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8803 conditions, 2066 events. 1313/2066 cut-off events. For 12778/12793 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9913 event pairs, 411 based on Foata normal form. 16/2079 useless extension candidates. Maximal degree in co-relation 8774. Up to 1813 conditions per place. [2024-06-28 03:45:38,009 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-28 03:45:38,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1009 flow [2024-06-28 03:45:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:45:38,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 03:45:38,011 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 627 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:45:38,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1009 flow [2024-06-28 03:45:38,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 961 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:38,023 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 677 flow [2024-06-28 03:45:38,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-28 03:45:38,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-28 03:45:38,024 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 677 flow [2024-06-28 03:45:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:38,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:38,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:38,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:45:38,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:38,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash -638328934, now seen corresponding path program 3 times [2024-06-28 03:45:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:38,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739222734] [2024-06-28 03:45:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:40,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739222734] [2024-06-28 03:45:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739222734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:40,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:40,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288187614] [2024-06-28 03:45:40,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:40,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:40,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:40,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:40,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 677 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:40,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:40,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:40,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:41,264 INFO L124 PetriNetUnfolderBase]: 1303/2052 cut-off events. [2024-06-28 03:45:41,264 INFO L125 PetriNetUnfolderBase]: For 14372/14387 co-relation queries the response was YES. [2024-06-28 03:45:41,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 2052 events. 1303/2052 cut-off events. For 14372/14387 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9849 event pairs, 409 based on Foata normal form. 16/2065 useless extension candidates. Maximal degree in co-relation 8948. Up to 1805 conditions per place. [2024-06-28 03:45:41,296 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-28 03:45:41,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 116 transitions, 985 flow [2024-06-28 03:45:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:45:41,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 03:45:41,307 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 677 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:45:41,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 116 transitions, 985 flow [2024-06-28 03:45:41,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 116 transitions, 905 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 03:45:41,337 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 663 flow [2024-06-28 03:45:41,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=663, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-28 03:45:41,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 03:45:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 663 flow [2024-06-28 03:45:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:41,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:41,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:45:41,339 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:41,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -638329120, now seen corresponding path program 4 times [2024-06-28 03:45:41,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:41,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11812374] [2024-06-28 03:45:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11812374] [2024-06-28 03:45:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11812374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:43,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:43,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:43,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507226726] [2024-06-28 03:45:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:43,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:43,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 663 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:43,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:43,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:43,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:44,575 INFO L124 PetriNetUnfolderBase]: 1298/2042 cut-off events. [2024-06-28 03:45:44,575 INFO L125 PetriNetUnfolderBase]: For 15889/15895 co-relation queries the response was YES. [2024-06-28 03:45:44,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9028 conditions, 2042 events. 1298/2042 cut-off events. For 15889/15895 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9784 event pairs, 452 based on Foata normal form. 3/2038 useless extension candidates. Maximal degree in co-relation 8996. Up to 1801 conditions per place. [2024-06-28 03:45:44,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 37 changer transitions 0/111 dead transitions. [2024-06-28 03:45:44,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 943 flow [2024-06-28 03:45:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:45:44,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:45:44,595 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 663 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:45:44,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 943 flow [2024-06-28 03:45:44,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 844 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:45:44,612 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 646 flow [2024-06-28 03:45:44,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=646, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-28 03:45:44,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 03:45:44,613 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 646 flow [2024-06-28 03:45:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:44,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:44,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:45:44,614 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1567344355, now seen corresponding path program 1 times [2024-06-28 03:45:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:44,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624322712] [2024-06-28 03:45:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624322712] [2024-06-28 03:45:47,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624322712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:47,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:47,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:45:47,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937416222] [2024-06-28 03:45:47,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:45:47,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:45:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:45:47,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:47,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 646 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:47,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:47,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:47,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:48,330 INFO L124 PetriNetUnfolderBase]: 1324/2099 cut-off events. [2024-06-28 03:45:48,330 INFO L125 PetriNetUnfolderBase]: For 17862/17870 co-relation queries the response was YES. [2024-06-28 03:45:48,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9322 conditions, 2099 events. 1324/2099 cut-off events. For 17862/17870 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10234 event pairs, 426 based on Foata normal form. 12/2110 useless extension candidates. Maximal degree in co-relation 9289. Up to 1872 conditions per place. [2024-06-28 03:45:48,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 29 changer transitions 0/128 dead transitions. [2024-06-28 03:45:48,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1038 flow [2024-06-28 03:45:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:45:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:45:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:45:48,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:45:48,343 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 646 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:45:48,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1038 flow [2024-06-28 03:45:48,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 938 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:45:48,358 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 653 flow [2024-06-28 03:45:48,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-06-28 03:45:48,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 03:45:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 653 flow [2024-06-28 03:45:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:48,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:48,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:48,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:45:48,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:48,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1621597733, now seen corresponding path program 2 times [2024-06-28 03:45:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:48,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862037051] [2024-06-28 03:45:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:48,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:51,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:51,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862037051] [2024-06-28 03:45:51,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862037051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:51,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:51,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:45:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064121744] [2024-06-28 03:45:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:45:51,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:45:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:45:51,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:51,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 653 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:52,504 INFO L124 PetriNetUnfolderBase]: 1386/2201 cut-off events. [2024-06-28 03:45:52,505 INFO L125 PetriNetUnfolderBase]: For 21375/21377 co-relation queries the response was YES. [2024-06-28 03:45:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10215 conditions, 2201 events. 1386/2201 cut-off events. For 21375/21377 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10840 event pairs, 395 based on Foata normal form. 4/2200 useless extension candidates. Maximal degree in co-relation 10181. Up to 1699 conditions per place. [2024-06-28 03:45:52,516 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 55 changer transitions 0/139 dead transitions. [2024-06-28 03:45:52,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1259 flow [2024-06-28 03:45:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:45:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:45:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:45:52,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 03:45:52,519 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 653 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:45:52,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1259 flow [2024-06-28 03:45:52,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1178 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 03:45:52,576 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 816 flow [2024-06-28 03:45:52,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=816, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-28 03:45:52,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 03:45:52,577 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 816 flow [2024-06-28 03:45:52,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:52,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:52,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:52,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:45:52,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:52,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1325495051, now seen corresponding path program 3 times [2024-06-28 03:45:52,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:52,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030404713] [2024-06-28 03:45:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:52,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:55,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:55,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030404713] [2024-06-28 03:45:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030404713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:55,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:45:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148217749] [2024-06-28 03:45:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:45:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:45:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:45:55,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:55,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 816 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:55,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:55,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:55,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:56,592 INFO L124 PetriNetUnfolderBase]: 1376/2187 cut-off events. [2024-06-28 03:45:56,592 INFO L125 PetriNetUnfolderBase]: For 24516/24518 co-relation queries the response was YES. [2024-06-28 03:45:56,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10562 conditions, 2187 events. 1376/2187 cut-off events. For 24516/24518 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10770 event pairs, 393 based on Foata normal form. 4/2186 useless extension candidates. Maximal degree in co-relation 10527. Up to 1691 conditions per place. [2024-06-28 03:45:56,603 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 53 changer transitions 0/138 dead transitions. [2024-06-28 03:45:56,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 138 transitions, 1246 flow [2024-06-28 03:45:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:45:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:45:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:45:56,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 03:45:56,607 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 816 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:45:56,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 138 transitions, 1246 flow [2024-06-28 03:45:56,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1162 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:56,629 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 846 flow [2024-06-28 03:45:56,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=846, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-28 03:45:56,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-28 03:45:56,635 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 846 flow [2024-06-28 03:45:56,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:56,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:56,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:45:56,636 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:56,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash -24945963, now seen corresponding path program 4 times [2024-06-28 03:45:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:56,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209389376] [2024-06-28 03:45:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209389376] [2024-06-28 03:45:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209389376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:45:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550206780] [2024-06-28 03:45:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:45:59,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:45:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:45:59,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:59,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:59,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:59,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:59,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:00,441 INFO L124 PetriNetUnfolderBase]: 1402/2234 cut-off events. [2024-06-28 03:46:00,441 INFO L125 PetriNetUnfolderBase]: For 27553/27559 co-relation queries the response was YES. [2024-06-28 03:46:00,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11067 conditions, 2234 events. 1402/2234 cut-off events. For 27553/27559 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11087 event pairs, 406 based on Foata normal form. 5/2232 useless extension candidates. Maximal degree in co-relation 11030. Up to 1713 conditions per place. [2024-06-28 03:46:00,452 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 60 changer transitions 0/136 dead transitions. [2024-06-28 03:46:00,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 136 transitions, 1316 flow [2024-06-28 03:46:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:46:00,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:46:00,454 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 846 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:46:00,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 136 transitions, 1316 flow [2024-06-28 03:46:00,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 136 transitions, 1185 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:00,482 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 895 flow [2024-06-28 03:46:00,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-28 03:46:00,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 03:46:00,483 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 895 flow [2024-06-28 03:46:00,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:00,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:00,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:46:00,484 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:00,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash 535555473, now seen corresponding path program 5 times [2024-06-28 03:46:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894931974] [2024-06-28 03:46:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894931974] [2024-06-28 03:46:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894931974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:03,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:03,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824313221] [2024-06-28 03:46:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:03,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:03,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 895 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:03,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:03,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:03,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:04,658 INFO L124 PetriNetUnfolderBase]: 1428/2278 cut-off events. [2024-06-28 03:46:04,659 INFO L125 PetriNetUnfolderBase]: For 30398/30404 co-relation queries the response was YES. [2024-06-28 03:46:04,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11454 conditions, 2278 events. 1428/2278 cut-off events. For 30398/30404 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11314 event pairs, 400 based on Foata normal form. 5/2276 useless extension candidates. Maximal degree in co-relation 11416. Up to 1735 conditions per place. [2024-06-28 03:46:04,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 59 changer transitions 0/140 dead transitions. [2024-06-28 03:46:04,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 140 transitions, 1379 flow [2024-06-28 03:46:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:46:04,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 03:46:04,673 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 895 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:46:04,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 140 transitions, 1379 flow [2024-06-28 03:46:04,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1240 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:04,696 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 934 flow [2024-06-28 03:46:04,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-28 03:46:04,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-28 03:46:04,697 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 934 flow [2024-06-28 03:46:04,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:04,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:04,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:04,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:46:04,698 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:04,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash -5544123, now seen corresponding path program 6 times [2024-06-28 03:46:04,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:04,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8579422] [2024-06-28 03:46:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:04,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8579422] [2024-06-28 03:46:07,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8579422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:07,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:07,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:07,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872435944] [2024-06-28 03:46:07,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:07,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:07,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:07,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:07,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:07,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:07,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:08,482 INFO L124 PetriNetUnfolderBase]: 1418/2264 cut-off events. [2024-06-28 03:46:08,482 INFO L125 PetriNetUnfolderBase]: For 32230/32236 co-relation queries the response was YES. [2024-06-28 03:46:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11359 conditions, 2264 events. 1418/2264 cut-off events. For 32230/32236 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11273 event pairs, 398 based on Foata normal form. 5/2262 useless extension candidates. Maximal degree in co-relation 11320. Up to 1727 conditions per place. [2024-06-28 03:46:08,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 73 selfloop transitions, 60 changer transitions 0/138 dead transitions. [2024-06-28 03:46:08,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 138 transitions, 1290 flow [2024-06-28 03:46:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:46:08,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:46:08,496 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 934 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:46:08,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 138 transitions, 1290 flow [2024-06-28 03:46:08,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1071 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:08,518 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 843 flow [2024-06-28 03:46:08,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=843, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-06-28 03:46:08,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-28 03:46:08,519 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 843 flow [2024-06-28 03:46:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:08,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:08,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:46:08,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:08,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2090154, now seen corresponding path program 1 times [2024-06-28 03:46:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:08,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095804936] [2024-06-28 03:46:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:11,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:11,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095804936] [2024-06-28 03:46:11,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095804936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:11,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:11,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193127931] [2024-06-28 03:46:11,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:11,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:11,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:11,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:11,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 843 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:11,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:11,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:12,566 INFO L124 PetriNetUnfolderBase]: 1410/2257 cut-off events. [2024-06-28 03:46:12,566 INFO L125 PetriNetUnfolderBase]: For 32735/32737 co-relation queries the response was YES. [2024-06-28 03:46:12,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11209 conditions, 2257 events. 1410/2257 cut-off events. For 32735/32737 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11294 event pairs, 408 based on Foata normal form. 4/2260 useless extension candidates. Maximal degree in co-relation 11169. Up to 2066 conditions per place. [2024-06-28 03:46:12,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 16 changer transitions 0/140 dead transitions. [2024-06-28 03:46:12,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 140 transitions, 1247 flow [2024-06-28 03:46:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:46:12,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:46:12,581 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 843 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:46:12,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 140 transitions, 1247 flow [2024-06-28 03:46:12,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 1115 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:12,600 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 810 flow [2024-06-28 03:46:12,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=810, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-28 03:46:12,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 03:46:12,601 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 810 flow [2024-06-28 03:46:12,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:12,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:12,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:12,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:46:12,601 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:12,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:12,602 INFO L85 PathProgramCache]: Analyzing trace with hash -814333927, now seen corresponding path program 1 times [2024-06-28 03:46:12,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:12,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661797588] [2024-06-28 03:46:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:12,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:13,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661797588] [2024-06-28 03:46:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661797588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:13,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:46:13,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935451357] [2024-06-28 03:46:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:13,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:46:13,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:46:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:46:13,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:46:13,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 810 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:13,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:13,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:46:13,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:14,673 INFO L124 PetriNetUnfolderBase]: 1172/1972 cut-off events. [2024-06-28 03:46:14,673 INFO L125 PetriNetUnfolderBase]: For 33935/33950 co-relation queries the response was YES. [2024-06-28 03:46:14,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10139 conditions, 1972 events. 1172/1972 cut-off events. For 33935/33950 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10438 event pairs, 370 based on Foata normal form. 15/1962 useless extension candidates. Maximal degree in co-relation 10097. Up to 1717 conditions per place. [2024-06-28 03:46:14,684 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 95 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2024-06-28 03:46:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 124 transitions, 1066 flow [2024-06-28 03:46:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:46:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:46:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-28 03:46:14,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 03:46:14,686 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 810 flow. Second operand 5 states and 93 transitions. [2024-06-28 03:46:14,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 124 transitions, 1066 flow [2024-06-28 03:46:14,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 124 transitions, 1011 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:14,713 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 803 flow [2024-06-28 03:46:14,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=803, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2024-06-28 03:46:14,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 03:46:14,713 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 803 flow [2024-06-28 03:46:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:14,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:14,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:46:14,714 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:14,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:14,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1388402469, now seen corresponding path program 1 times [2024-06-28 03:46:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465956301] [2024-06-28 03:46:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:14,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:17,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:17,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465956301] [2024-06-28 03:46:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465956301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:17,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:17,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755863551] [2024-06-28 03:46:17,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:17,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:17,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:17,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 803 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:17,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:17,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:17,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:18,452 INFO L124 PetriNetUnfolderBase]: 1452/2327 cut-off events. [2024-06-28 03:46:18,452 INFO L125 PetriNetUnfolderBase]: For 38520/38528 co-relation queries the response was YES. [2024-06-28 03:46:18,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11999 conditions, 2327 events. 1452/2327 cut-off events. For 38520/38528 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11756 event pairs, 270 based on Foata normal form. 12/2338 useless extension candidates. Maximal degree in co-relation 11956. Up to 1978 conditions per place. [2024-06-28 03:46:18,466 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 126 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-28 03:46:18,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 163 transitions, 1405 flow [2024-06-28 03:46:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:46:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:46:18,468 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 803 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:46:18,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 163 transitions, 1405 flow [2024-06-28 03:46:18,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 163 transitions, 1379 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:46:18,487 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 924 flow [2024-06-28 03:46:18,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=924, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-28 03:46:18,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-28 03:46:18,488 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 924 flow [2024-06-28 03:46:18,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:18,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:18,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:18,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:46:18,489 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:18,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1398961127, now seen corresponding path program 2 times [2024-06-28 03:46:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338531604] [2024-06-28 03:46:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:21,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338531604] [2024-06-28 03:46:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338531604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:21,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204545022] [2024-06-28 03:46:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:21,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:21,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:21,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:21,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:21,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:22,332 INFO L124 PetriNetUnfolderBase]: 1444/2315 cut-off events. [2024-06-28 03:46:22,333 INFO L125 PetriNetUnfolderBase]: For 41567/41575 co-relation queries the response was YES. [2024-06-28 03:46:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12258 conditions, 2315 events. 1444/2315 cut-off events. For 41567/41575 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11644 event pairs, 378 based on Foata normal form. 12/2326 useless extension candidates. Maximal degree in co-relation 12214. Up to 2054 conditions per place. [2024-06-28 03:46:22,363 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 28 changer transitions 0/155 dead transitions. [2024-06-28 03:46:22,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1336 flow [2024-06-28 03:46:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:46:22,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:46:22,365 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 924 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:46:22,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1336 flow [2024-06-28 03:46:22,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 155 transitions, 1241 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:22,401 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 893 flow [2024-06-28 03:46:22,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2024-06-28 03:46:22,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-28 03:46:22,402 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 893 flow [2024-06-28 03:46:22,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:22,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:22,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:46:22,403 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:22,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1270254339, now seen corresponding path program 3 times [2024-06-28 03:46:22,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932061411] [2024-06-28 03:46:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932061411] [2024-06-28 03:46:25,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932061411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:25,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:25,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:25,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110002751] [2024-06-28 03:46:25,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:25,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:25,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:25,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:25,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:26,280 INFO L124 PetriNetUnfolderBase]: 1464/2345 cut-off events. [2024-06-28 03:46:26,280 INFO L125 PetriNetUnfolderBase]: For 45381/45386 co-relation queries the response was YES. [2024-06-28 03:46:26,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12514 conditions, 2345 events. 1464/2345 cut-off events. For 45381/45386 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11869 event pairs, 389 based on Foata normal form. 6/2349 useless extension candidates. Maximal degree in co-relation 12468. Up to 2031 conditions per place. [2024-06-28 03:46:26,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 39 changer transitions 0/152 dead transitions. [2024-06-28 03:46:26,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 152 transitions, 1319 flow [2024-06-28 03:46:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:46:26,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:46:26,294 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 893 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:46:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 152 transitions, 1319 flow [2024-06-28 03:46:26,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1256 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:26,331 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 959 flow [2024-06-28 03:46:26,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-06-28 03:46:26,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-28 03:46:26,332 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 959 flow [2024-06-28 03:46:26,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:26,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:26,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:26,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:46:26,332 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:26,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1001402513, now seen corresponding path program 4 times [2024-06-28 03:46:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:26,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054290493] [2024-06-28 03:46:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:29,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054290493] [2024-06-28 03:46:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054290493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:29,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:29,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175712928] [2024-06-28 03:46:29,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:29,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:29,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:29,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 959 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:29,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:29,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:29,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:30,256 INFO L124 PetriNetUnfolderBase]: 1456/2330 cut-off events. [2024-06-28 03:46:30,256 INFO L125 PetriNetUnfolderBase]: For 48315/48321 co-relation queries the response was YES. [2024-06-28 03:46:30,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12632 conditions, 2330 events. 1456/2330 cut-off events. For 48315/48321 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11722 event pairs, 396 based on Foata normal form. 5/2328 useless extension candidates. Maximal degree in co-relation 12585. Up to 2019 conditions per place. [2024-06-28 03:46:30,269 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 39 changer transitions 0/151 dead transitions. [2024-06-28 03:46:30,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 1379 flow [2024-06-28 03:46:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:46:30,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:46:30,271 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 959 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:46:30,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 1379 flow [2024-06-28 03:46:30,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1268 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:46:30,300 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 981 flow [2024-06-28 03:46:30,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=981, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2024-06-28 03:46:30,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-28 03:46:30,301 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 981 flow [2024-06-28 03:46:30,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:30,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:30,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:30,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:46:30,302 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:30,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:30,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1229354068, now seen corresponding path program 1 times [2024-06-28 03:46:30,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:30,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734538573] [2024-06-28 03:46:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:30,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:33,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734538573] [2024-06-28 03:46:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734538573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:46:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870485331] [2024-06-28 03:46:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:46:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:46:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:46:33,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:33,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 981 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:33,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:33,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:33,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:34,640 INFO L124 PetriNetUnfolderBase]: 1648/2679 cut-off events. [2024-06-28 03:46:34,640 INFO L125 PetriNetUnfolderBase]: For 67292/67300 co-relation queries the response was YES. [2024-06-28 03:46:34,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14900 conditions, 2679 events. 1648/2679 cut-off events. For 67292/67300 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14361 event pairs, 328 based on Foata normal form. 24/2702 useless extension candidates. Maximal degree in co-relation 14852. Up to 1968 conditions per place. [2024-06-28 03:46:34,655 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-28 03:46:34,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 1695 flow [2024-06-28 03:46:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:46:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:46:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 03:46:34,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-28 03:46:34,657 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 981 flow. Second operand 10 states and 188 transitions. [2024-06-28 03:46:34,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 1695 flow [2024-06-28 03:46:34,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 1580 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 03:46:34,700 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 1006 flow [2024-06-28 03:46:34,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1006, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-28 03:46:34,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-28 03:46:34,701 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 1006 flow [2024-06-28 03:46:34,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:34,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:34,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:34,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:46:34,701 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:34,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1856283210, now seen corresponding path program 2 times [2024-06-28 03:46:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788892139] [2024-06-28 03:46:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:34,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:37,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788892139] [2024-06-28 03:46:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788892139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:37,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:37,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:46:37,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339765754] [2024-06-28 03:46:37,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:37,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:46:37,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:46:37,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:46:37,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:37,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 1006 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:37,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:37,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:37,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:39,024 INFO L124 PetriNetUnfolderBase]: 1716/2797 cut-off events. [2024-06-28 03:46:39,024 INFO L125 PetriNetUnfolderBase]: For 72366/72374 co-relation queries the response was YES. [2024-06-28 03:46:39,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15607 conditions, 2797 events. 1716/2797 cut-off events. For 72366/72374 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15122 event pairs, 426 based on Foata normal form. 24/2820 useless extension candidates. Maximal degree in co-relation 15558. Up to 2178 conditions per place. [2024-06-28 03:46:39,039 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 142 selfloop transitions, 31 changer transitions 0/178 dead transitions. [2024-06-28 03:46:39,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 1668 flow [2024-06-28 03:46:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:46:39,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:46:39,041 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 1006 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:46:39,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 1668 flow [2024-06-28 03:46:39,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 178 transitions, 1605 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 03:46:39,078 INFO L231 Difference]: Finished difference. Result has 117 places, 124 transitions, 1045 flow [2024-06-28 03:46:39,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1045, PETRI_PLACES=117, PETRI_TRANSITIONS=124} [2024-06-28 03:46:39,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-28 03:46:39,079 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 124 transitions, 1045 flow [2024-06-28 03:46:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:46:39,080 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:39,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1769443530, now seen corresponding path program 3 times [2024-06-28 03:46:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438214496] [2024-06-28 03:46:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:42,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:42,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438214496] [2024-06-28 03:46:42,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438214496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:42,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:42,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:46:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494606441] [2024-06-28 03:46:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:42,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:46:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:46:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:46:42,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:42,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 124 transitions, 1045 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:42,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:42,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:42,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:43,592 INFO L124 PetriNetUnfolderBase]: 1680/2741 cut-off events. [2024-06-28 03:46:43,592 INFO L125 PetriNetUnfolderBase]: For 70738/70746 co-relation queries the response was YES. [2024-06-28 03:46:43,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14867 conditions, 2741 events. 1680/2741 cut-off events. For 70738/70746 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14696 event pairs, 432 based on Foata normal form. 28/2768 useless extension candidates. Maximal degree in co-relation 14816. Up to 2308 conditions per place. [2024-06-28 03:46:43,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-28 03:46:43,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 1537 flow [2024-06-28 03:46:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:46:43,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:46:43,612 INFO L175 Difference]: Start difference. First operand has 117 places, 124 transitions, 1045 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:46:43,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 1537 flow [2024-06-28 03:46:43,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1440 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:43,653 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1015 flow [2024-06-28 03:46:43,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1015, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-06-28 03:46:43,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-28 03:46:43,654 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1015 flow [2024-06-28 03:46:43,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:43,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:43,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:43,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:46:43,655 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:43,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash -717667196, now seen corresponding path program 4 times [2024-06-28 03:46:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:43,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262439175] [2024-06-28 03:46:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:43,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:46,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:46,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262439175] [2024-06-28 03:46:46,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262439175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:46,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:46,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:46:46,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857965254] [2024-06-28 03:46:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:46,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:46:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:46,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:46:46,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:46:46,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:46,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1015 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:46,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:46,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:46,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:48,396 INFO L124 PetriNetUnfolderBase]: 1768/2885 cut-off events. [2024-06-28 03:46:48,396 INFO L125 PetriNetUnfolderBase]: For 74298/74300 co-relation queries the response was YES. [2024-06-28 03:46:48,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15478 conditions, 2885 events. 1768/2885 cut-off events. For 74298/74300 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15783 event pairs, 423 based on Foata normal form. 20/2900 useless extension candidates. Maximal degree in co-relation 15426. Up to 2173 conditions per place. [2024-06-28 03:46:48,412 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 101 selfloop transitions, 64 changer transitions 0/170 dead transitions. [2024-06-28 03:46:48,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1525 flow [2024-06-28 03:46:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:46:48,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:46:48,413 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1015 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:46:48,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1525 flow [2024-06-28 03:46:48,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 170 transitions, 1459 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 03:46:48,451 INFO L231 Difference]: Finished difference. Result has 120 places, 125 transitions, 1120 flow [2024-06-28 03:46:48,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1120, PETRI_PLACES=120, PETRI_TRANSITIONS=125} [2024-06-28 03:46:48,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-28 03:46:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 125 transitions, 1120 flow [2024-06-28 03:46:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:48,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:48,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:48,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:46:48,452 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 556799396, now seen corresponding path program 5 times [2024-06-28 03:46:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111068906] [2024-06-28 03:46:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:51,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111068906] [2024-06-28 03:46:51,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111068906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:51,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:51,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:46:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21913243] [2024-06-28 03:46:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:46:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:46:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:46:51,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:51,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 125 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:51,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:51,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:51,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:53,014 INFO L124 PetriNetUnfolderBase]: 1856/3045 cut-off events. [2024-06-28 03:46:53,014 INFO L125 PetriNetUnfolderBase]: For 82482/82484 co-relation queries the response was YES. [2024-06-28 03:46:53,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16633 conditions, 3045 events. 1856/3045 cut-off events. For 82482/82484 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16966 event pairs, 451 based on Foata normal form. 20/3060 useless extension candidates. Maximal degree in co-relation 16580. Up to 2321 conditions per place. [2024-06-28 03:46:53,035 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 62 changer transitions 0/172 dead transitions. [2024-06-28 03:46:53,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 172 transitions, 1640 flow [2024-06-28 03:46:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:46:53,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 03:46:53,044 INFO L175 Difference]: Start difference. First operand has 120 places, 125 transitions, 1120 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:46:53,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 172 transitions, 1640 flow [2024-06-28 03:46:53,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 172 transitions, 1497 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:53,119 INFO L231 Difference]: Finished difference. Result has 122 places, 126 transitions, 1146 flow [2024-06-28 03:46:53,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1146, PETRI_PLACES=122, PETRI_TRANSITIONS=126} [2024-06-28 03:46:53,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 03:46:53,119 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 126 transitions, 1146 flow [2024-06-28 03:46:53,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:53,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:53,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:53,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:46:53,120 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:53,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1804434870, now seen corresponding path program 6 times [2024-06-28 03:46:53,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:53,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129314448] [2024-06-28 03:46:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:53,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:56,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129314448] [2024-06-28 03:46:56,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129314448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:56,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:56,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:46:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347214092] [2024-06-28 03:46:56,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:46:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:46:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:46:56,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:56,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 1146 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:56,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:56,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:56,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:57,710 INFO L124 PetriNetUnfolderBase]: 1924/3155 cut-off events. [2024-06-28 03:46:57,710 INFO L125 PetriNetUnfolderBase]: For 86483/86485 co-relation queries the response was YES. [2024-06-28 03:46:57,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17256 conditions, 3155 events. 1924/3155 cut-off events. For 86483/86485 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17723 event pairs, 429 based on Foata normal form. 16/3166 useless extension candidates. Maximal degree in co-relation 17202. Up to 2157 conditions per place. [2024-06-28 03:46:57,731 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 65 changer transitions 0/176 dead transitions. [2024-06-28 03:46:57,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 176 transitions, 1690 flow [2024-06-28 03:46:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:46:57,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-28 03:46:57,733 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 1146 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:46:57,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 176 transitions, 1690 flow [2024-06-28 03:46:57,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1549 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:57,852 INFO L231 Difference]: Finished difference. Result has 124 places, 127 transitions, 1181 flow [2024-06-28 03:46:57,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1181, PETRI_PLACES=124, PETRI_TRANSITIONS=127} [2024-06-28 03:46:57,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-28 03:46:57,853 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 127 transitions, 1181 flow [2024-06-28 03:46:57,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:57,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:57,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:57,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:46:57,853 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:57,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 562377257, now seen corresponding path program 1 times [2024-06-28 03:46:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:57,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384708856] [2024-06-28 03:46:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:57,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:01,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:01,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384708856] [2024-06-28 03:47:01,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384708856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:01,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:01,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267427944] [2024-06-28 03:47:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:01,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:01,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 127 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:01,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:01,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:03,013 INFO L124 PetriNetUnfolderBase]: 1944/3196 cut-off events. [2024-06-28 03:47:03,013 INFO L125 PetriNetUnfolderBase]: For 85723/85731 co-relation queries the response was YES. [2024-06-28 03:47:03,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17494 conditions, 3196 events. 1944/3196 cut-off events. For 85723/85731 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18184 event pairs, 475 based on Foata normal form. 12/3203 useless extension candidates. Maximal degree in co-relation 17439. Up to 2840 conditions per place. [2024-06-28 03:47:03,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 132 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-28 03:47:03,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 173 transitions, 1706 flow [2024-06-28 03:47:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:47:03,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:47:03,033 INFO L175 Difference]: Start difference. First operand has 124 places, 127 transitions, 1181 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:47:03,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 173 transitions, 1706 flow [2024-06-28 03:47:03,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 173 transitions, 1546 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:47:03,089 INFO L231 Difference]: Finished difference. Result has 127 places, 132 transitions, 1177 flow [2024-06-28 03:47:03,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1177, PETRI_PLACES=127, PETRI_TRANSITIONS=132} [2024-06-28 03:47:03,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-28 03:47:03,090 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 132 transitions, 1177 flow [2024-06-28 03:47:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:03,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:03,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:03,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:47:03,090 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:03,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -253999572, now seen corresponding path program 1 times [2024-06-28 03:47:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:03,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077898995] [2024-06-28 03:47:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:05,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:05,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077898995] [2024-06-28 03:47:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077898995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:05,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:05,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:47:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433313291] [2024-06-28 03:47:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:47:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:47:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:47:05,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:47:05,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 132 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:05,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:05,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:47:05,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:06,605 INFO L124 PetriNetUnfolderBase]: 1701/2916 cut-off events. [2024-06-28 03:47:06,606 INFO L125 PetriNetUnfolderBase]: For 86843/86856 co-relation queries the response was YES. [2024-06-28 03:47:06,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16203 conditions, 2916 events. 1701/2916 cut-off events. For 86843/86856 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17453 event pairs, 462 based on Foata normal form. 15/2874 useless extension candidates. Maximal degree in co-relation 16146. Up to 2511 conditions per place. [2024-06-28 03:47:06,626 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 106 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-06-28 03:47:06,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 154 transitions, 1509 flow [2024-06-28 03:47:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:47:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:47:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 03:47:06,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 03:47:06,628 INFO L175 Difference]: Start difference. First operand has 127 places, 132 transitions, 1177 flow. Second operand 6 states and 115 transitions. [2024-06-28 03:47:06,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 154 transitions, 1509 flow [2024-06-28 03:47:06,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 154 transitions, 1398 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:47:06,683 INFO L231 Difference]: Finished difference. Result has 127 places, 135 transitions, 1150 flow [2024-06-28 03:47:06,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1150, PETRI_PLACES=127, PETRI_TRANSITIONS=135} [2024-06-28 03:47:06,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-28 03:47:06,684 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 135 transitions, 1150 flow [2024-06-28 03:47:06,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:06,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:06,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:06,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:47:06,685 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:06,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash -727226128, now seen corresponding path program 7 times [2024-06-28 03:47:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:06,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887979368] [2024-06-28 03:47:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:06,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887979368] [2024-06-28 03:47:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887979368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:09,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:09,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:09,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838529966] [2024-06-28 03:47:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:09,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:09,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:09,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:09,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 135 transitions, 1150 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:09,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:09,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:09,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:11,336 INFO L124 PetriNetUnfolderBase]: 2052/3370 cut-off events. [2024-06-28 03:47:11,336 INFO L125 PetriNetUnfolderBase]: For 103515/103521 co-relation queries the response was YES. [2024-06-28 03:47:11,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18790 conditions, 3370 events. 2052/3370 cut-off events. For 103515/103521 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19275 event pairs, 462 based on Foata normal form. 21/3384 useless extension candidates. Maximal degree in co-relation 18732. Up to 2645 conditions per place. [2024-06-28 03:47:11,360 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 63 changer transitions 0/179 dead transitions. [2024-06-28 03:47:11,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 1694 flow [2024-06-28 03:47:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:47:11,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:47:11,362 INFO L175 Difference]: Start difference. First operand has 127 places, 135 transitions, 1150 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:47:11,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 1694 flow [2024-06-28 03:47:11,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 1640 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:47:11,434 INFO L231 Difference]: Finished difference. Result has 132 places, 136 transitions, 1273 flow [2024-06-28 03:47:11,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1273, PETRI_PLACES=132, PETRI_TRANSITIONS=136} [2024-06-28 03:47:11,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-28 03:47:11,434 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 136 transitions, 1273 flow [2024-06-28 03:47:11,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:11,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:11,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:47:11,435 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:11,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1032895068, now seen corresponding path program 8 times [2024-06-28 03:47:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:11,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214059747] [2024-06-28 03:47:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214059747] [2024-06-28 03:47:14,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214059747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:14,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:14,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:14,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708597984] [2024-06-28 03:47:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:14,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:14,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:14,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:14,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 136 transitions, 1273 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:14,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:14,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:14,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:16,188 INFO L124 PetriNetUnfolderBase]: 2140/3512 cut-off events. [2024-06-28 03:47:16,188 INFO L125 PetriNetUnfolderBase]: For 114451/114457 co-relation queries the response was YES. [2024-06-28 03:47:16,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20073 conditions, 3512 events. 2140/3512 cut-off events. For 114451/114457 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20289 event pairs, 468 based on Foata normal form. 21/3526 useless extension candidates. Maximal degree in co-relation 20014. Up to 2793 conditions per place. [2024-06-28 03:47:16,208 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 64 changer transitions 0/180 dead transitions. [2024-06-28 03:47:16,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 1821 flow [2024-06-28 03:47:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:47:16,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 03:47:16,210 INFO L175 Difference]: Start difference. First operand has 132 places, 136 transitions, 1273 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:47:16,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 1821 flow [2024-06-28 03:47:16,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 180 transitions, 1672 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 03:47:16,285 INFO L231 Difference]: Finished difference. Result has 134 places, 137 transitions, 1305 flow [2024-06-28 03:47:16,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1305, PETRI_PLACES=134, PETRI_TRANSITIONS=137} [2024-06-28 03:47:16,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-28 03:47:16,285 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 137 transitions, 1305 flow [2024-06-28 03:47:16,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:16,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:16,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:16,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:47:16,286 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:16,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1742435666, now seen corresponding path program 9 times [2024-06-28 03:47:16,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:16,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7136619] [2024-06-28 03:47:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:16,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7136619] [2024-06-28 03:47:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7136619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:19,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547878541] [2024-06-28 03:47:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:19,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:19,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 137 transitions, 1305 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:19,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:19,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:19,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:20,727 INFO L124 PetriNetUnfolderBase]: 2228/3678 cut-off events. [2024-06-28 03:47:20,727 INFO L125 PetriNetUnfolderBase]: For 122263/122269 co-relation queries the response was YES. [2024-06-28 03:47:20,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20970 conditions, 3678 events. 2228/3678 cut-off events. For 122263/122269 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21654 event pairs, 502 based on Foata normal form. 21/3692 useless extension candidates. Maximal degree in co-relation 20910. Up to 2941 conditions per place. [2024-06-28 03:47:20,749 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-28 03:47:20,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 1849 flow [2024-06-28 03:47:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:47:20,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:47:20,754 INFO L175 Difference]: Start difference. First operand has 134 places, 137 transitions, 1305 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:47:20,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 1849 flow [2024-06-28 03:47:20,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 1696 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:47:20,838 INFO L231 Difference]: Finished difference. Result has 136 places, 138 transitions, 1341 flow [2024-06-28 03:47:20,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1341, PETRI_PLACES=136, PETRI_TRANSITIONS=138} [2024-06-28 03:47:20,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-28 03:47:20,839 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 138 transitions, 1341 flow [2024-06-28 03:47:20,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:20,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:20,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:20,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:47:20,840 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:20,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1033042938, now seen corresponding path program 10 times [2024-06-28 03:47:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448390283] [2024-06-28 03:47:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:23,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448390283] [2024-06-28 03:47:23,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448390283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:23,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:23,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:23,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725007742] [2024-06-28 03:47:23,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:23,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:23,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 138 transitions, 1341 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:23,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:23,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:23,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:25,301 INFO L124 PetriNetUnfolderBase]: 2240/3706 cut-off events. [2024-06-28 03:47:25,302 INFO L125 PetriNetUnfolderBase]: For 119171/119177 co-relation queries the response was YES. [2024-06-28 03:47:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20775 conditions, 3706 events. 2240/3706 cut-off events. For 119171/119177 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21832 event pairs, 476 based on Foata normal form. 17/3716 useless extension candidates. Maximal degree in co-relation 20714. Up to 2543 conditions per place. [2024-06-28 03:47:25,324 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 68 changer transitions 0/185 dead transitions. [2024-06-28 03:47:25,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 185 transitions, 1917 flow [2024-06-28 03:47:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:47:25,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:47:25,326 INFO L175 Difference]: Start difference. First operand has 136 places, 138 transitions, 1341 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:47:25,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 185 transitions, 1917 flow [2024-06-28 03:47:25,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1756 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 03:47:25,406 INFO L231 Difference]: Finished difference. Result has 138 places, 139 transitions, 1372 flow [2024-06-28 03:47:25,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1372, PETRI_PLACES=138, PETRI_TRANSITIONS=139} [2024-06-28 03:47:25,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 03:47:25,406 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 139 transitions, 1372 flow [2024-06-28 03:47:25,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:25,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:25,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:25,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:47:25,407 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:25,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1659334907, now seen corresponding path program 2 times [2024-06-28 03:47:25,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:25,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216771986] [2024-06-28 03:47:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:29,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216771986] [2024-06-28 03:47:29,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216771986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:29,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:29,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739170646] [2024-06-28 03:47:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:29,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:29,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 139 transitions, 1372 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:29,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:29,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:29,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:30,938 INFO L124 PetriNetUnfolderBase]: 2260/3751 cut-off events. [2024-06-28 03:47:30,938 INFO L125 PetriNetUnfolderBase]: For 114650/114665 co-relation queries the response was YES. [2024-06-28 03:47:30,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20937 conditions, 3751 events. 2260/3751 cut-off events. For 114650/114665 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22334 event pairs, 547 based on Foata normal form. 16/3764 useless extension candidates. Maximal degree in co-relation 20875. Up to 3372 conditions per place. [2024-06-28 03:47:30,965 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 139 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2024-06-28 03:47:30,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 182 transitions, 1923 flow [2024-06-28 03:47:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:47:30,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:47:30,967 INFO L175 Difference]: Start difference. First operand has 138 places, 139 transitions, 1372 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:47:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 182 transitions, 1923 flow [2024-06-28 03:47:31,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 182 transitions, 1747 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 03:47:31,048 INFO L231 Difference]: Finished difference. Result has 141 places, 144 transitions, 1370 flow [2024-06-28 03:47:31,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1370, PETRI_PLACES=141, PETRI_TRANSITIONS=144} [2024-06-28 03:47:31,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-28 03:47:31,050 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 144 transitions, 1370 flow [2024-06-28 03:47:31,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:31,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:31,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:31,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:47:31,051 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:31,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1999151657, now seen corresponding path program 3 times [2024-06-28 03:47:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:31,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792951609] [2024-06-28 03:47:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:34,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792951609] [2024-06-28 03:47:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792951609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:34,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:34,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:34,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246915133] [2024-06-28 03:47:34,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:34,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:34,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:34,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:34,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:34,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 144 transitions, 1370 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:34,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:34,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:34,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:35,516 INFO L124 PetriNetUnfolderBase]: 2293/3820 cut-off events. [2024-06-28 03:47:35,516 INFO L125 PetriNetUnfolderBase]: For 117532/117547 co-relation queries the response was YES. [2024-06-28 03:47:35,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21240 conditions, 3820 events. 2293/3820 cut-off events. For 117532/117547 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22940 event pairs, 565 based on Foata normal form. 16/3833 useless extension candidates. Maximal degree in co-relation 21176. Up to 3418 conditions per place. [2024-06-28 03:47:35,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 138 selfloop transitions, 46 changer transitions 0/189 dead transitions. [2024-06-28 03:47:35,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 189 transitions, 1960 flow [2024-06-28 03:47:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:47:35,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 03:47:35,542 INFO L175 Difference]: Start difference. First operand has 141 places, 144 transitions, 1370 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:47:35,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 189 transitions, 1960 flow [2024-06-28 03:47:35,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 189 transitions, 1821 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 03:47:35,622 INFO L231 Difference]: Finished difference. Result has 145 places, 152 transitions, 1462 flow [2024-06-28 03:47:35,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1462, PETRI_PLACES=145, PETRI_TRANSITIONS=152} [2024-06-28 03:47:35,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 03:47:35,622 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 152 transitions, 1462 flow [2024-06-28 03:47:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:35,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:35,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:35,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:47:35,623 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:35,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash 400359675, now seen corresponding path program 4 times [2024-06-28 03:47:35,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:35,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517673198] [2024-06-28 03:47:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:35,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517673198] [2024-06-28 03:47:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517673198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:38,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516798007] [2024-06-28 03:47:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:38,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:38,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 152 transitions, 1462 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:38,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:38,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:38,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:40,232 INFO L124 PetriNetUnfolderBase]: 2313/3840 cut-off events. [2024-06-28 03:47:40,233 INFO L125 PetriNetUnfolderBase]: For 124220/124235 co-relation queries the response was YES. [2024-06-28 03:47:40,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21882 conditions, 3840 events. 2313/3840 cut-off events. For 124220/124235 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22964 event pairs, 499 based on Foata normal form. 16/3853 useless extension candidates. Maximal degree in co-relation 21816. Up to 3328 conditions per place. [2024-06-28 03:47:40,260 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 55 changer transitions 0/196 dead transitions. [2024-06-28 03:47:40,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 196 transitions, 2244 flow [2024-06-28 03:47:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:47:40,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 03:47:40,270 INFO L175 Difference]: Start difference. First operand has 145 places, 152 transitions, 1462 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:47:40,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 196 transitions, 2244 flow [2024-06-28 03:47:40,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 2125 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 03:47:40,385 INFO L231 Difference]: Finished difference. Result has 150 places, 156 transitions, 1596 flow [2024-06-28 03:47:40,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1596, PETRI_PLACES=150, PETRI_TRANSITIONS=156} [2024-06-28 03:47:40,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-28 03:47:40,387 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 156 transitions, 1596 flow [2024-06-28 03:47:40,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:40,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:40,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:40,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:47:40,387 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:40,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 134335965, now seen corresponding path program 5 times [2024-06-28 03:47:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21444018] [2024-06-28 03:47:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21444018] [2024-06-28 03:47:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21444018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:43,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282878473] [2024-06-28 03:47:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:43,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:43,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:43,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:43,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 156 transitions, 1596 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:43,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:43,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:43,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:45,449 INFO L124 PetriNetUnfolderBase]: 2305/3828 cut-off events. [2024-06-28 03:47:45,450 INFO L125 PetriNetUnfolderBase]: For 124632/124647 co-relation queries the response was YES. [2024-06-28 03:47:45,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21207 conditions, 3828 events. 2305/3828 cut-off events. For 124632/124647 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22881 event pairs, 551 based on Foata normal form. 16/3841 useless extension candidates. Maximal degree in co-relation 21140. Up to 3438 conditions per place. [2024-06-28 03:47:45,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2024-06-28 03:47:45,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 193 transitions, 2082 flow [2024-06-28 03:47:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:47:45,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 03:47:45,479 INFO L175 Difference]: Start difference. First operand has 150 places, 156 transitions, 1596 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:47:45,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 193 transitions, 2082 flow [2024-06-28 03:47:45,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 193 transitions, 1918 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 03:47:45,608 INFO L231 Difference]: Finished difference. Result has 154 places, 156 transitions, 1527 flow [2024-06-28 03:47:45,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1527, PETRI_PLACES=154, PETRI_TRANSITIONS=156} [2024-06-28 03:47:45,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:47:45,609 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 156 transitions, 1527 flow [2024-06-28 03:47:45,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:45,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:45,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:47:45,610 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:45,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -982945372, now seen corresponding path program 2 times [2024-06-28 03:47:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982625229] [2024-06-28 03:47:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982625229] [2024-06-28 03:47:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982625229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:47,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:47,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:47:47,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183520922] [2024-06-28 03:47:47,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:47,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:47:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:47:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:47:47,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:47:47,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 156 transitions, 1527 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:47,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:47,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:47:47,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:48,756 INFO L124 PetriNetUnfolderBase]: 2014/3459 cut-off events. [2024-06-28 03:47:48,756 INFO L125 PetriNetUnfolderBase]: For 123018/123029 co-relation queries the response was YES. [2024-06-28 03:47:48,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19231 conditions, 3459 events. 2014/3459 cut-off events. For 123018/123029 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21637 event pairs, 513 based on Foata normal form. 13/3407 useless extension candidates. Maximal degree in co-relation 19162. Up to 3016 conditions per place. [2024-06-28 03:47:48,781 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 112 selfloop transitions, 26 changer transitions 0/172 dead transitions. [2024-06-28 03:47:48,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 172 transitions, 1869 flow [2024-06-28 03:47:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:47:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:47:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 03:47:48,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:47:48,783 INFO L175 Difference]: Start difference. First operand has 154 places, 156 transitions, 1527 flow. Second operand 6 states and 110 transitions. [2024-06-28 03:47:48,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 172 transitions, 1869 flow [2024-06-28 03:47:48,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1723 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-28 03:47:48,891 INFO L231 Difference]: Finished difference. Result has 149 places, 159 transitions, 1477 flow [2024-06-28 03:47:48,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1477, PETRI_PLACES=149, PETRI_TRANSITIONS=159} [2024-06-28 03:47:48,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 03:47:48,892 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 159 transitions, 1477 flow [2024-06-28 03:47:48,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:48,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:48,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:47:48,893 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:48,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -897473640, now seen corresponding path program 1 times [2024-06-28 03:47:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:48,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319699857] [2024-06-28 03:47:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:48,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:50,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:50,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319699857] [2024-06-28 03:47:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319699857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:50,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:47:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309632305] [2024-06-28 03:47:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:50,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:47:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:47:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:47:50,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:50,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 159 transitions, 1477 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:50,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:50,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:50,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:51,380 INFO L124 PetriNetUnfolderBase]: 2303/3822 cut-off events. [2024-06-28 03:47:51,380 INFO L125 PetriNetUnfolderBase]: For 126953/126955 co-relation queries the response was YES. [2024-06-28 03:47:51,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21226 conditions, 3822 events. 2303/3822 cut-off events. For 126953/126955 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22797 event pairs, 546 based on Foata normal form. 2/3823 useless extension candidates. Maximal degree in co-relation 21159. Up to 3588 conditions per place. [2024-06-28 03:47:51,408 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 163 selfloop transitions, 16 changer transitions 0/184 dead transitions. [2024-06-28 03:47:51,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 184 transitions, 2041 flow [2024-06-28 03:47:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:47:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:47:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:47:51,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:47:51,410 INFO L175 Difference]: Start difference. First operand has 149 places, 159 transitions, 1477 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:47:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 184 transitions, 2041 flow [2024-06-28 03:47:51,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 184 transitions, 1967 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:47:51,521 INFO L231 Difference]: Finished difference. Result has 151 places, 165 transitions, 1519 flow [2024-06-28 03:47:51,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1519, PETRI_PLACES=151, PETRI_TRANSITIONS=165} [2024-06-28 03:47:51,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 03:47:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 165 transitions, 1519 flow [2024-06-28 03:47:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:51,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:51,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:47:51,522 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:51,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -232128390, now seen corresponding path program 2 times [2024-06-28 03:47:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445114518] [2024-06-28 03:47:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:53,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:53,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445114518] [2024-06-28 03:47:53,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445114518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:53,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:53,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:47:53,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506108103] [2024-06-28 03:47:53,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:53,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:47:53,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:47:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:47:53,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:53,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 1519 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:53,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:53,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:53,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:54,333 INFO L124 PetriNetUnfolderBase]: 2297/3815 cut-off events. [2024-06-28 03:47:54,335 INFO L125 PetriNetUnfolderBase]: For 130441/130446 co-relation queries the response was YES. [2024-06-28 03:47:54,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21297 conditions, 3815 events. 2297/3815 cut-off events. For 130441/130446 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22758 event pairs, 549 based on Foata normal form. 4/3817 useless extension candidates. Maximal degree in co-relation 21229. Up to 3583 conditions per place. [2024-06-28 03:47:54,363 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 157 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2024-06-28 03:47:54,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 178 transitions, 1899 flow [2024-06-28 03:47:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:47:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:47:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 03:47:54,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 03:47:54,366 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 1519 flow. Second operand 6 states and 100 transitions. [2024-06-28 03:47:54,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 178 transitions, 1899 flow [2024-06-28 03:47:54,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 178 transitions, 1839 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-28 03:47:54,485 INFO L231 Difference]: Finished difference. Result has 155 places, 165 transitions, 1497 flow [2024-06-28 03:47:54,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1497, PETRI_PLACES=155, PETRI_TRANSITIONS=165} [2024-06-28 03:47:54,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-28 03:47:54,487 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 165 transitions, 1497 flow [2024-06-28 03:47:54,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:54,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:54,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:54,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:47:54,488 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:54,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash -890798472, now seen corresponding path program 1 times [2024-06-28 03:47:54,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:54,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074798670] [2024-06-28 03:47:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:54,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074798670] [2024-06-28 03:47:56,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074798670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:56,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:56,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:47:56,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45119899] [2024-06-28 03:47:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:47:56,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:47:56,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:47:56,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:47:56,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 165 transitions, 1497 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:56,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:56,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:47:56,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:57,903 INFO L124 PetriNetUnfolderBase]: 2025/3483 cut-off events. [2024-06-28 03:47:57,903 INFO L125 PetriNetUnfolderBase]: For 133209/133222 co-relation queries the response was YES. [2024-06-28 03:47:57,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19713 conditions, 3483 events. 2025/3483 cut-off events. For 133209/133222 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21757 event pairs, 507 based on Foata normal form. 13/3441 useless extension candidates. Maximal degree in co-relation 19643. Up to 3068 conditions per place. [2024-06-28 03:47:57,931 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 134 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2024-06-28 03:47:57,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 180 transitions, 1847 flow [2024-06-28 03:47:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:47:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:47:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:47:57,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 03:47:57,933 INFO L175 Difference]: Start difference. First operand has 155 places, 165 transitions, 1497 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:47:57,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 180 transitions, 1847 flow [2024-06-28 03:47:58,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 180 transitions, 1803 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:47:58,129 INFO L231 Difference]: Finished difference. Result has 156 places, 167 transitions, 1510 flow [2024-06-28 03:47:58,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1510, PETRI_PLACES=156, PETRI_TRANSITIONS=167} [2024-06-28 03:47:58,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 03:47:58,129 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 167 transitions, 1510 flow [2024-06-28 03:47:58,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:58,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:58,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:47:58,130 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:58,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash 280404996, now seen corresponding path program 1 times [2024-06-28 03:47:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:58,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367377178] [2024-06-28 03:47:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:02,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367377178] [2024-06-28 03:48:02,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367377178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:02,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:02,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:48:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027726504] [2024-06-28 03:48:02,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:02,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:48:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:48:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:48:02,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:02,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 167 transitions, 1510 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:02,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:02,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:02,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:04,200 INFO L124 PetriNetUnfolderBase]: 2484/4179 cut-off events. [2024-06-28 03:48:04,200 INFO L125 PetriNetUnfolderBase]: For 152962/152964 co-relation queries the response was YES. [2024-06-28 03:48:04,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23069 conditions, 4179 events. 2484/4179 cut-off events. For 152962/152964 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25783 event pairs, 550 based on Foata normal form. 12/4186 useless extension candidates. Maximal degree in co-relation 22998. Up to 3084 conditions per place. [2024-06-28 03:48:04,234 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 81 changer transitions 0/228 dead transitions. [2024-06-28 03:48:04,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 228 transitions, 2280 flow [2024-06-28 03:48:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:48:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:48:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:48:04,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 03:48:04,235 INFO L175 Difference]: Start difference. First operand has 156 places, 167 transitions, 1510 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:48:04,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 228 transitions, 2280 flow [2024-06-28 03:48:04,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 228 transitions, 2239 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:48:04,383 INFO L231 Difference]: Finished difference. Result has 164 places, 178 transitions, 1824 flow [2024-06-28 03:48:04,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1824, PETRI_PLACES=164, PETRI_TRANSITIONS=178} [2024-06-28 03:48:04,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 03:48:04,383 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 178 transitions, 1824 flow [2024-06-28 03:48:04,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:04,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:04,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:04,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:48:04,384 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:04,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -97598446, now seen corresponding path program 2 times [2024-06-28 03:48:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913843111] [2024-06-28 03:48:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:08,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913843111] [2024-06-28 03:48:08,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913843111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:08,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:08,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:48:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007195539] [2024-06-28 03:48:08,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:48:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:48:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:48:08,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:08,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 178 transitions, 1824 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:08,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:08,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:08,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:09,974 INFO L124 PetriNetUnfolderBase]: 2628/4464 cut-off events. [2024-06-28 03:48:09,975 INFO L125 PetriNetUnfolderBase]: For 166223/166229 co-relation queries the response was YES. [2024-06-28 03:48:09,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25239 conditions, 4464 events. 2628/4464 cut-off events. For 166223/166229 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28165 event pairs, 607 based on Foata normal form. 13/4470 useless extension candidates. Maximal degree in co-relation 25165. Up to 3448 conditions per place. [2024-06-28 03:48:10,006 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 82 changer transitions 0/233 dead transitions. [2024-06-28 03:48:10,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 233 transitions, 2578 flow [2024-06-28 03:48:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:48:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:48:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 03:48:10,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:48:10,010 INFO L175 Difference]: Start difference. First operand has 164 places, 178 transitions, 1824 flow. Second operand 10 states and 184 transitions. [2024-06-28 03:48:10,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 233 transitions, 2578 flow [2024-06-28 03:48:10,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 233 transitions, 2404 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:10,213 INFO L231 Difference]: Finished difference. Result has 171 places, 186 transitions, 1978 flow [2024-06-28 03:48:10,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1978, PETRI_PLACES=171, PETRI_TRANSITIONS=186} [2024-06-28 03:48:10,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-28 03:48:10,214 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 186 transitions, 1978 flow [2024-06-28 03:48:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:10,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:10,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:10,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:48:10,214 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:10,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:10,215 INFO L85 PathProgramCache]: Analyzing trace with hash -130551168, now seen corresponding path program 3 times [2024-06-28 03:48:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659462483] [2024-06-28 03:48:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:14,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:14,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659462483] [2024-06-28 03:48:14,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659462483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:14,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:14,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:48:14,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134392427] [2024-06-28 03:48:14,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:14,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:48:14,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:48:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:48:14,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:14,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 186 transitions, 1978 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:14,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:14,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:14,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:15,923 INFO L124 PetriNetUnfolderBase]: 2757/4713 cut-off events. [2024-06-28 03:48:15,924 INFO L125 PetriNetUnfolderBase]: For 175899/175905 co-relation queries the response was YES. [2024-06-28 03:48:15,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26755 conditions, 4713 events. 2757/4713 cut-off events. For 175899/175905 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30453 event pairs, 643 based on Foata normal form. 13/4719 useless extension candidates. Maximal degree in co-relation 26678. Up to 3774 conditions per place. [2024-06-28 03:48:15,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 145 selfloop transitions, 88 changer transitions 0/238 dead transitions. [2024-06-28 03:48:15,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 2715 flow [2024-06-28 03:48:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:48:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:48:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 03:48:15,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-28 03:48:15,981 INFO L175 Difference]: Start difference. First operand has 171 places, 186 transitions, 1978 flow. Second operand 10 states and 183 transitions. [2024-06-28 03:48:15,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 2715 flow [2024-06-28 03:48:16,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 238 transitions, 2527 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:16,170 INFO L231 Difference]: Finished difference. Result has 178 places, 192 transitions, 2105 flow [2024-06-28 03:48:16,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2105, PETRI_PLACES=178, PETRI_TRANSITIONS=192} [2024-06-28 03:48:16,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 03:48:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 192 transitions, 2105 flow [2024-06-28 03:48:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:16,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:16,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:16,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:48:16,171 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:16,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2129260306, now seen corresponding path program 4 times [2024-06-28 03:48:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:16,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161005566] [2024-06-28 03:48:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:16,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:20,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:20,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161005566] [2024-06-28 03:48:20,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161005566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:20,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:48:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374940492] [2024-06-28 03:48:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:48:20,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:48:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:48:20,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:20,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 192 transitions, 2105 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:20,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:20,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:20,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:21,941 INFO L124 PetriNetUnfolderBase]: 2853/4893 cut-off events. [2024-06-28 03:48:21,942 INFO L125 PetriNetUnfolderBase]: For 185300/185306 co-relation queries the response was YES. [2024-06-28 03:48:21,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27956 conditions, 4893 events. 2853/4893 cut-off events. For 185300/185306 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32009 event pairs, 673 based on Foata normal form. 13/4899 useless extension candidates. Maximal degree in co-relation 27876. Up to 3942 conditions per place. [2024-06-28 03:48:21,983 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 94 changer transitions 0/242 dead transitions. [2024-06-28 03:48:21,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 242 transitions, 2839 flow [2024-06-28 03:48:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:48:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:48:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 03:48:21,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 03:48:21,989 INFO L175 Difference]: Start difference. First operand has 178 places, 192 transitions, 2105 flow. Second operand 10 states and 182 transitions. [2024-06-28 03:48:21,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 242 transitions, 2839 flow [2024-06-28 03:48:22,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 242 transitions, 2634 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:22,243 INFO L231 Difference]: Finished difference. Result has 184 places, 196 transitions, 2204 flow [2024-06-28 03:48:22,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2204, PETRI_PLACES=184, PETRI_TRANSITIONS=196} [2024-06-28 03:48:22,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-28 03:48:22,244 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 196 transitions, 2204 flow [2024-06-28 03:48:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:22,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:22,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:48:22,249 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:22,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1802013154, now seen corresponding path program 5 times [2024-06-28 03:48:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432389810] [2024-06-28 03:48:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:25,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432389810] [2024-06-28 03:48:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432389810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:48:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771807622] [2024-06-28 03:48:25,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:25,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:48:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:48:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:48:25,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:25,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 196 transitions, 2204 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:25,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:25,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:25,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:27,773 INFO L124 PetriNetUnfolderBase]: 2833/4861 cut-off events. [2024-06-28 03:48:27,773 INFO L125 PetriNetUnfolderBase]: For 175607/175613 co-relation queries the response was YES. [2024-06-28 03:48:27,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27124 conditions, 4861 events. 2833/4861 cut-off events. For 175607/175613 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31655 event pairs, 617 based on Foata normal form. 13/4867 useless extension candidates. Maximal degree in co-relation 27042. Up to 2786 conditions per place. [2024-06-28 03:48:27,814 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 109 changer transitions 0/242 dead transitions. [2024-06-28 03:48:27,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 2752 flow [2024-06-28 03:48:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:48:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:48:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 03:48:27,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-28 03:48:27,816 INFO L175 Difference]: Start difference. First operand has 184 places, 196 transitions, 2204 flow. Second operand 10 states and 181 transitions. [2024-06-28 03:48:27,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 2752 flow [2024-06-28 03:48:28,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 2556 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:28,055 INFO L231 Difference]: Finished difference. Result has 188 places, 195 transitions, 2142 flow [2024-06-28 03:48:28,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2142, PETRI_PLACES=188, PETRI_TRANSITIONS=195} [2024-06-28 03:48:28,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-28 03:48:28,056 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 195 transitions, 2142 flow [2024-06-28 03:48:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:28,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:28,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:28,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:48:28,056 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:28,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2052027215, now seen corresponding path program 1 times [2024-06-28 03:48:28,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:28,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977021841] [2024-06-28 03:48:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:28,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:29,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:29,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977021841] [2024-06-28 03:48:29,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977021841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:29,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813771314] [2024-06-28 03:48:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:29,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:29,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:29,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:29,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:29,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 195 transitions, 2142 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:29,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:29,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:29,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:31,523 INFO L124 PetriNetUnfolderBase]: 2843/4878 cut-off events. [2024-06-28 03:48:31,524 INFO L125 PetriNetUnfolderBase]: For 167944/167946 co-relation queries the response was YES. [2024-06-28 03:48:31,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27262 conditions, 4878 events. 2843/4878 cut-off events. For 167944/167946 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31942 event pairs, 661 based on Foata normal form. 2/4879 useless extension candidates. Maximal degree in co-relation 27179. Up to 4501 conditions per place. [2024-06-28 03:48:31,568 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 24 changer transitions 0/226 dead transitions. [2024-06-28 03:48:31,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 226 transitions, 2822 flow [2024-06-28 03:48:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:48:31,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 03:48:31,569 INFO L175 Difference]: Start difference. First operand has 188 places, 195 transitions, 2142 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:48:31,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 226 transitions, 2822 flow [2024-06-28 03:48:31,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 226 transitions, 2533 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-28 03:48:31,834 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 1985 flow [2024-06-28 03:48:31,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1985, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-28 03:48:31,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 03:48:31,834 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 1985 flow [2024-06-28 03:48:31,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:31,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:31,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:31,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:48:31,835 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:31,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2051877485, now seen corresponding path program 2 times [2024-06-28 03:48:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:31,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691561195] [2024-06-28 03:48:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:31,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:33,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:33,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691561195] [2024-06-28 03:48:33,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691561195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:33,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:33,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:33,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857040627] [2024-06-28 03:48:33,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:33,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:33,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:33,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:33,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:33,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:33,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 1985 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:33,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:33,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:33,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:35,137 INFO L124 PetriNetUnfolderBase]: 2853/4892 cut-off events. [2024-06-28 03:48:35,138 INFO L125 PetriNetUnfolderBase]: For 167501/167503 co-relation queries the response was YES. [2024-06-28 03:48:35,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26824 conditions, 4892 events. 2853/4892 cut-off events. For 167501/167503 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32067 event pairs, 661 based on Foata normal form. 2/4893 useless extension candidates. Maximal degree in co-relation 26741. Up to 4511 conditions per place. [2024-06-28 03:48:35,181 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 26 changer transitions 0/225 dead transitions. [2024-06-28 03:48:35,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 225 transitions, 2623 flow [2024-06-28 03:48:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:48:35,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 03:48:35,182 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 1985 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:48:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 225 transitions, 2623 flow [2024-06-28 03:48:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 225 transitions, 2555 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 03:48:35,428 INFO L231 Difference]: Finished difference. Result has 190 places, 204 transitions, 2017 flow [2024-06-28 03:48:35,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2017, PETRI_PLACES=190, PETRI_TRANSITIONS=204} [2024-06-28 03:48:35,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-28 03:48:35,429 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 204 transitions, 2017 flow [2024-06-28 03:48:35,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:35,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:35,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:48:35,429 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:35,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash 728328775, now seen corresponding path program 3 times [2024-06-28 03:48:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366040288] [2024-06-28 03:48:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:37,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:37,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366040288] [2024-06-28 03:48:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366040288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:37,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088361769] [2024-06-28 03:48:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:37,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:37,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:37,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 204 transitions, 2017 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:37,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:37,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:37,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:38,874 INFO L124 PetriNetUnfolderBase]: 2847/4886 cut-off events. [2024-06-28 03:48:38,875 INFO L125 PetriNetUnfolderBase]: For 170693/170698 co-relation queries the response was YES. [2024-06-28 03:48:38,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26793 conditions, 4886 events. 2847/4886 cut-off events. For 170693/170698 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32032 event pairs, 671 based on Foata normal form. 4/4887 useless extension candidates. Maximal degree in co-relation 26708. Up to 4506 conditions per place. [2024-06-28 03:48:38,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 26 changer transitions 0/219 dead transitions. [2024-06-28 03:48:38,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 219 transitions, 2483 flow [2024-06-28 03:48:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:48:38,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 03:48:38,918 INFO L175 Difference]: Start difference. First operand has 190 places, 204 transitions, 2017 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:48:38,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 219 transitions, 2483 flow [2024-06-28 03:48:39,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 219 transitions, 2411 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 03:48:39,175 INFO L231 Difference]: Finished difference. Result has 193 places, 204 transitions, 2003 flow [2024-06-28 03:48:39,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2003, PETRI_PLACES=193, PETRI_TRANSITIONS=204} [2024-06-28 03:48:39,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 03:48:39,175 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 204 transitions, 2003 flow [2024-06-28 03:48:39,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:39,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:39,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:39,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:48:39,176 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:39,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash 604619129, now seen corresponding path program 1 times [2024-06-28 03:48:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:39,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979864387] [2024-06-28 03:48:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:39,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:41,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979864387] [2024-06-28 03:48:41,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979864387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:41,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:41,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:41,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599804824] [2024-06-28 03:48:41,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:41,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:41,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:41,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:41,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 204 transitions, 2003 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:41,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:41,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:41,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:42,989 INFO L124 PetriNetUnfolderBase]: 2889/4945 cut-off events. [2024-06-28 03:48:42,989 INFO L125 PetriNetUnfolderBase]: For 182209/182220 co-relation queries the response was YES. [2024-06-28 03:48:43,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27455 conditions, 4945 events. 2889/4945 cut-off events. For 182209/182220 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32453 event pairs, 666 based on Foata normal form. 12/4955 useless extension candidates. Maximal degree in co-relation 27369. Up to 4529 conditions per place. [2024-06-28 03:48:43,026 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 212 selfloop transitions, 30 changer transitions 0/247 dead transitions. [2024-06-28 03:48:43,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 247 transitions, 2929 flow [2024-06-28 03:48:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:48:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:48:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 03:48:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 03:48:43,028 INFO L175 Difference]: Start difference. First operand has 193 places, 204 transitions, 2003 flow. Second operand 9 states and 151 transitions. [2024-06-28 03:48:43,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 247 transitions, 2929 flow [2024-06-28 03:48:43,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 247 transitions, 2853 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:48:43,279 INFO L231 Difference]: Finished difference. Result has 196 places, 215 transitions, 2151 flow [2024-06-28 03:48:43,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=196, PETRI_TRANSITIONS=215} [2024-06-28 03:48:43,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-28 03:48:43,280 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 215 transitions, 2151 flow [2024-06-28 03:48:43,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:43,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:43,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:48:43,280 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:43,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash -61734847, now seen corresponding path program 2 times [2024-06-28 03:48:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296528552] [2024-06-28 03:48:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:45,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296528552] [2024-06-28 03:48:45,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296528552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:45,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:45,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104792938] [2024-06-28 03:48:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:45,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:45,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:45,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 215 transitions, 2151 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:45,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:45,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:45,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:47,088 INFO L124 PetriNetUnfolderBase]: 2883/4937 cut-off events. [2024-06-28 03:48:47,088 INFO L125 PetriNetUnfolderBase]: For 186259/186270 co-relation queries the response was YES. [2024-06-28 03:48:47,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27667 conditions, 4937 events. 2883/4937 cut-off events. For 186259/186270 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32410 event pairs, 666 based on Foata normal form. 12/4947 useless extension candidates. Maximal degree in co-relation 27579. Up to 4524 conditions per place. [2024-06-28 03:48:47,136 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 28 changer transitions 0/239 dead transitions. [2024-06-28 03:48:47,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 239 transitions, 2797 flow [2024-06-28 03:48:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 03:48:47,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 03:48:47,138 INFO L175 Difference]: Start difference. First operand has 196 places, 215 transitions, 2151 flow. Second operand 7 states and 121 transitions. [2024-06-28 03:48:47,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 239 transitions, 2797 flow [2024-06-28 03:48:47,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 239 transitions, 2661 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:47,370 INFO L231 Difference]: Finished difference. Result has 198 places, 215 transitions, 2077 flow [2024-06-28 03:48:47,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2077, PETRI_PLACES=198, PETRI_TRANSITIONS=215} [2024-06-28 03:48:47,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-28 03:48:47,370 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 215 transitions, 2077 flow [2024-06-28 03:48:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:47,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:47,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:48:47,371 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:47,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 719604683, now seen corresponding path program 1 times [2024-06-28 03:48:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:47,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207443585] [2024-06-28 03:48:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:47,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207443585] [2024-06-28 03:48:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207443585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:50,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:48:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127996719] [2024-06-28 03:48:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:48:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:48:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:48:50,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:48:50,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 215 transitions, 2077 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:50,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:50,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:48:50,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:52,114 INFO L124 PetriNetUnfolderBase]: 2618/4583 cut-off events. [2024-06-28 03:48:52,114 INFO L125 PetriNetUnfolderBase]: For 206037/206064 co-relation queries the response was YES. [2024-06-28 03:48:52,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26085 conditions, 4583 events. 2618/4583 cut-off events. For 206037/206064 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30962 event pairs, 606 based on Foata normal form. 23/4515 useless extension candidates. Maximal degree in co-relation 25996. Up to 3945 conditions per place. [2024-06-28 03:48:52,163 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 175 selfloop transitions, 24 changer transitions 0/241 dead transitions. [2024-06-28 03:48:52,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 241 transitions, 2581 flow [2024-06-28 03:48:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:48:52,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-28 03:48:52,165 INFO L175 Difference]: Start difference. First operand has 198 places, 215 transitions, 2077 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:48:52,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 241 transitions, 2581 flow [2024-06-28 03:48:52,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 241 transitions, 2525 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 03:48:52,391 INFO L231 Difference]: Finished difference. Result has 199 places, 216 transitions, 2093 flow [2024-06-28 03:48:52,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2093, PETRI_PLACES=199, PETRI_TRANSITIONS=216} [2024-06-28 03:48:52,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 03:48:52,392 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 216 transitions, 2093 flow [2024-06-28 03:48:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:52,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:52,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:52,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:48:52,393 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:52,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash 803920919, now seen corresponding path program 3 times [2024-06-28 03:48:52,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:52,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857422145] [2024-06-28 03:48:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:54,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:54,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857422145] [2024-06-28 03:48:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857422145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:54,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:54,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:54,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488364581] [2024-06-28 03:48:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:54,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:54,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 216 transitions, 2093 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:54,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:54,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:54,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:56,006 INFO L124 PetriNetUnfolderBase]: 2921/4998 cut-off events. [2024-06-28 03:48:56,006 INFO L125 PetriNetUnfolderBase]: For 195422/195437 co-relation queries the response was YES. [2024-06-28 03:48:56,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27905 conditions, 4998 events. 2921/4998 cut-off events. For 195422/195437 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32807 event pairs, 683 based on Foata normal form. 14/5009 useless extension candidates. Maximal degree in co-relation 27815. Up to 4609 conditions per place. [2024-06-28 03:48:56,054 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 22 changer transitions 0/240 dead transitions. [2024-06-28 03:48:56,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 240 transitions, 2644 flow [2024-06-28 03:48:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:48:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 03:48:56,068 INFO L175 Difference]: Start difference. First operand has 199 places, 216 transitions, 2093 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:48:56,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 240 transitions, 2644 flow [2024-06-28 03:48:56,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 240 transitions, 2570 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:56,361 INFO L231 Difference]: Finished difference. Result has 201 places, 217 transitions, 2082 flow [2024-06-28 03:48:56,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2082, PETRI_PLACES=201, PETRI_TRANSITIONS=217} [2024-06-28 03:48:56,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 03:48:56,362 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 217 transitions, 2082 flow [2024-06-28 03:48:56,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:56,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:56,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:48:56,362 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:56,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1986646499, now seen corresponding path program 4 times [2024-06-28 03:48:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:56,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729759072] [2024-06-28 03:48:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:56,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:58,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:58,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729759072] [2024-06-28 03:48:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729759072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:58,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:58,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:58,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228224852] [2024-06-28 03:48:58,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:58,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:58,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 217 transitions, 2082 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:58,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:58,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:58,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:59,995 INFO L124 PetriNetUnfolderBase]: 2931/5012 cut-off events. [2024-06-28 03:48:59,995 INFO L125 PetriNetUnfolderBase]: For 200966/200981 co-relation queries the response was YES. [2024-06-28 03:49:00,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27986 conditions, 5012 events. 2931/5012 cut-off events. For 200966/200981 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32936 event pairs, 670 based on Foata normal form. 14/5023 useless extension candidates. Maximal degree in co-relation 27895. Up to 4550 conditions per place. [2024-06-28 03:49:00,035 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-06-28 03:49:00,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 249 transitions, 2864 flow [2024-06-28 03:49:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 03:49:00,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 03:49:00,037 INFO L175 Difference]: Start difference. First operand has 201 places, 217 transitions, 2082 flow. Second operand 7 states and 121 transitions. [2024-06-28 03:49:00,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 249 transitions, 2864 flow [2024-06-28 03:49:00,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 249 transitions, 2822 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:00,374 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2270 flow [2024-06-28 03:49:00,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2270, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-28 03:49:00,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-28 03:49:00,374 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2270 flow [2024-06-28 03:49:00,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:00,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:00,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:49:00,375 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:00,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:00,375 INFO L85 PathProgramCache]: Analyzing trace with hash 262959225, now seen corresponding path program 5 times [2024-06-28 03:49:00,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:00,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106505959] [2024-06-28 03:49:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:02,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:02,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106505959] [2024-06-28 03:49:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106505959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:02,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:02,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790979233] [2024-06-28 03:49:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:02,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:02,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2270 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:02,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:02,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:02,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:03,997 INFO L124 PetriNetUnfolderBase]: 2941/5029 cut-off events. [2024-06-28 03:49:03,998 INFO L125 PetriNetUnfolderBase]: For 208817/208851 co-relation queries the response was YES. [2024-06-28 03:49:04,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28546 conditions, 5029 events. 2941/5029 cut-off events. For 208817/208851 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33084 event pairs, 681 based on Foata normal form. 22/5045 useless extension candidates. Maximal degree in co-relation 28453. Up to 4560 conditions per place. [2024-06-28 03:49:04,044 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 46 changer transitions 0/247 dead transitions. [2024-06-28 03:49:04,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 247 transitions, 2974 flow [2024-06-28 03:49:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:49:04,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:49:04,046 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2270 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:49:04,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 247 transitions, 2974 flow [2024-06-28 03:49:04,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 247 transitions, 2902 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-28 03:49:04,325 INFO L231 Difference]: Finished difference. Result has 209 places, 229 transitions, 2348 flow [2024-06-28 03:49:04,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2348, PETRI_PLACES=209, PETRI_TRANSITIONS=229} [2024-06-28 03:49:04,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 03:49:04,327 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 229 transitions, 2348 flow [2024-06-28 03:49:04,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:04,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:04,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:04,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:49:04,327 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:04,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1367584263, now seen corresponding path program 6 times [2024-06-28 03:49:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:04,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666913332] [2024-06-28 03:49:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:04,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666913332] [2024-06-28 03:49:06,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666913332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:06,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:06,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544866079] [2024-06-28 03:49:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:06,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:06,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:06,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:06,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 229 transitions, 2348 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:06,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:06,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:06,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:08,189 INFO L124 PetriNetUnfolderBase]: 2935/5021 cut-off events. [2024-06-28 03:49:08,190 INFO L125 PetriNetUnfolderBase]: For 210722/210756 co-relation queries the response was YES. [2024-06-28 03:49:08,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28370 conditions, 5021 events. 2935/5021 cut-off events. For 210722/210756 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33015 event pairs, 681 based on Foata normal form. 22/5037 useless extension candidates. Maximal degree in co-relation 28274. Up to 4555 conditions per place. [2024-06-28 03:49:08,316 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 46 changer transitions 0/246 dead transitions. [2024-06-28 03:49:08,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 246 transitions, 2880 flow [2024-06-28 03:49:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:49:08,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:49:08,318 INFO L175 Difference]: Start difference. First operand has 209 places, 229 transitions, 2348 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:49:08,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 246 transitions, 2880 flow [2024-06-28 03:49:08,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 246 transitions, 2736 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:08,551 INFO L231 Difference]: Finished difference. Result has 212 places, 229 transitions, 2302 flow [2024-06-28 03:49:08,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2302, PETRI_PLACES=212, PETRI_TRANSITIONS=229} [2024-06-28 03:49:08,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-28 03:49:08,552 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 229 transitions, 2302 flow [2024-06-28 03:49:08,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:08,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:08,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:08,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:49:08,553 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:08,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1359272295, now seen corresponding path program 2 times [2024-06-28 03:49:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778878650] [2024-06-28 03:49:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:11,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778878650] [2024-06-28 03:49:11,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778878650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:11,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:11,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:11,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080657022] [2024-06-28 03:49:11,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:11,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:11,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:11,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:49:11,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 229 transitions, 2302 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:11,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:11,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:49:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:13,164 INFO L124 PetriNetUnfolderBase]: 2676/4660 cut-off events. [2024-06-28 03:49:13,165 INFO L125 PetriNetUnfolderBase]: For 234226/234239 co-relation queries the response was YES. [2024-06-28 03:49:13,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26900 conditions, 4660 events. 2676/4660 cut-off events. For 234226/234239 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 31463 event pairs, 614 based on Foata normal form. 21/4579 useless extension candidates. Maximal degree in co-relation 26803. Up to 4007 conditions per place. [2024-06-28 03:49:13,210 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 168 selfloop transitions, 31 changer transitions 0/249 dead transitions. [2024-06-28 03:49:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 249 transitions, 2790 flow [2024-06-28 03:49:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:49:13,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:49:13,212 INFO L175 Difference]: Start difference. First operand has 212 places, 229 transitions, 2302 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:49:13,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 249 transitions, 2790 flow [2024-06-28 03:49:13,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 249 transitions, 2667 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 03:49:13,557 INFO L231 Difference]: Finished difference. Result has 213 places, 230 transitions, 2267 flow [2024-06-28 03:49:13,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2267, PETRI_PLACES=213, PETRI_TRANSITIONS=230} [2024-06-28 03:49:13,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-28 03:49:13,557 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 230 transitions, 2267 flow [2024-06-28 03:49:13,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:13,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:13,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:13,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:49:13,558 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:13,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1358797065, now seen corresponding path program 3 times [2024-06-28 03:49:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:13,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306784622] [2024-06-28 03:49:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:16,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306784622] [2024-06-28 03:49:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306784622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:49:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363599482] [2024-06-28 03:49:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:16,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:49:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:49:16,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:49:16,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:49:16,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 230 transitions, 2267 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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) [2024-06-28 03:49:16,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:16,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:49:16,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:17,808 INFO L124 PetriNetUnfolderBase]: 2683/4674 cut-off events. [2024-06-28 03:49:17,809 INFO L125 PetriNetUnfolderBase]: For 226897/226910 co-relation queries the response was YES. [2024-06-28 03:49:17,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26803 conditions, 4674 events. 2683/4674 cut-off events. For 226897/226910 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 31560 event pairs, 610 based on Foata normal form. 17/4592 useless extension candidates. Maximal degree in co-relation 26706. Up to 3938 conditions per place. [2024-06-28 03:49:17,849 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 168 selfloop transitions, 34 changer transitions 0/252 dead transitions. [2024-06-28 03:49:17,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 252 transitions, 2781 flow [2024-06-28 03:49:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 03:49:17,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 03:49:17,850 INFO L175 Difference]: Start difference. First operand has 213 places, 230 transitions, 2267 flow. Second operand 7 states and 127 transitions. [2024-06-28 03:49:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 252 transitions, 2781 flow [2024-06-28 03:49:18,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 252 transitions, 2715 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:18,118 INFO L231 Difference]: Finished difference. Result has 215 places, 231 transitions, 2295 flow [2024-06-28 03:49:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2295, PETRI_PLACES=215, PETRI_TRANSITIONS=231} [2024-06-28 03:49:18,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 03:49:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 231 transitions, 2295 flow [2024-06-28 03:49:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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) [2024-06-28 03:49:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:49:18,119 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:18,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1981892835, now seen corresponding path program 1 times [2024-06-28 03:49:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194884205] [2024-06-28 03:49:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194884205] [2024-06-28 03:49:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194884205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:20,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:20,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:20,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854956781] [2024-06-28 03:49:20,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:20,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:20,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:20,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 231 transitions, 2295 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:20,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:20,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:20,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:22,285 INFO L124 PetriNetUnfolderBase]: 2991/5110 cut-off events. [2024-06-28 03:49:22,285 INFO L125 PetriNetUnfolderBase]: For 223402/223404 co-relation queries the response was YES. [2024-06-28 03:49:22,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28775 conditions, 5110 events. 2991/5110 cut-off events. For 223402/223404 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33646 event pairs, 698 based on Foata normal form. 2/5111 useless extension candidates. Maximal degree in co-relation 28677. Up to 4749 conditions per place. [2024-06-28 03:49:22,339 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 17 changer transitions 0/260 dead transitions. [2024-06-28 03:49:22,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 260 transitions, 2919 flow [2024-06-28 03:49:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:49:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:49:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:49:22,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:49:22,341 INFO L175 Difference]: Start difference. First operand has 215 places, 231 transitions, 2295 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:49:22,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 260 transitions, 2919 flow [2024-06-28 03:49:22,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 260 transitions, 2841 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:22,654 INFO L231 Difference]: Finished difference. Result has 218 places, 234 transitions, 2305 flow [2024-06-28 03:49:22,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2305, PETRI_PLACES=218, PETRI_TRANSITIONS=234} [2024-06-28 03:49:22,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-28 03:49:22,654 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 234 transitions, 2305 flow [2024-06-28 03:49:22,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:22,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:22,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:22,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:49:22,655 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:22,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:22,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1982012805, now seen corresponding path program 2 times [2024-06-28 03:49:22,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:22,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86108666] [2024-06-28 03:49:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:22,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86108666] [2024-06-28 03:49:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86108666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:25,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:25,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311679499] [2024-06-28 03:49:25,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:25,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:25,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 234 transitions, 2305 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:26,935 INFO L124 PetriNetUnfolderBase]: 3001/5128 cut-off events. [2024-06-28 03:49:26,936 INFO L125 PetriNetUnfolderBase]: For 229291/229293 co-relation queries the response was YES. [2024-06-28 03:49:26,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29176 conditions, 5128 events. 3001/5128 cut-off events. For 229291/229293 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33797 event pairs, 677 based on Foata normal form. 2/5129 useless extension candidates. Maximal degree in co-relation 29077. Up to 4698 conditions per place. [2024-06-28 03:49:26,983 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-28 03:49:26,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 267 transitions, 3121 flow [2024-06-28 03:49:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:49:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:49:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:49:26,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 03:49:26,985 INFO L175 Difference]: Start difference. First operand has 218 places, 234 transitions, 2305 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:49:26,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 267 transitions, 3121 flow [2024-06-28 03:49:27,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 267 transitions, 3055 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:49:27,249 INFO L231 Difference]: Finished difference. Result has 220 places, 240 transitions, 2419 flow [2024-06-28 03:49:27,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2419, PETRI_PLACES=220, PETRI_TRANSITIONS=240} [2024-06-28 03:49:27,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-28 03:49:27,250 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 240 transitions, 2419 flow [2024-06-28 03:49:27,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:27,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:27,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:49:27,250 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:27,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 816315959, now seen corresponding path program 1 times [2024-06-28 03:49:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067052597] [2024-06-28 03:49:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067052597] [2024-06-28 03:49:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067052597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:30,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:30,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:30,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876548259] [2024-06-28 03:49:30,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:30,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:30,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:30,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:30,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 240 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:30,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:30,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:30,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:31,468 INFO L124 PetriNetUnfolderBase]: 3009/5140 cut-off events. [2024-06-28 03:49:31,468 INFO L125 PetriNetUnfolderBase]: For 238446/238448 co-relation queries the response was YES. [2024-06-28 03:49:31,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29771 conditions, 5140 events. 3009/5140 cut-off events. For 238446/238448 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33926 event pairs, 682 based on Foata normal form. 2/5141 useless extension candidates. Maximal degree in co-relation 29671. Up to 4777 conditions per place. [2024-06-28 03:49:31,599 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 239 selfloop transitions, 18 changer transitions 0/262 dead transitions. [2024-06-28 03:49:31,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 262 transitions, 3025 flow [2024-06-28 03:49:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:49:31,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:49:31,601 INFO L175 Difference]: Start difference. First operand has 220 places, 240 transitions, 2419 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:49:31,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 262 transitions, 3025 flow [2024-06-28 03:49:31,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 262 transitions, 2951 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:31,803 INFO L231 Difference]: Finished difference. Result has 223 places, 242 transitions, 2430 flow [2024-06-28 03:49:31,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=223, PETRI_TRANSITIONS=242} [2024-06-28 03:49:31,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:49:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 242 transitions, 2430 flow [2024-06-28 03:49:31,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:31,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:31,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:49:31,804 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:31,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 896913771, now seen corresponding path program 3 times [2024-06-28 03:49:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722584618] [2024-06-28 03:49:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:34,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722584618] [2024-06-28 03:49:34,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722584618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:34,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:34,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:34,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141710108] [2024-06-28 03:49:34,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:34,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:34,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:34,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:34,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:34,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 242 transitions, 2430 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:34,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:34,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:35,990 INFO L124 PetriNetUnfolderBase]: 3019/5167 cut-off events. [2024-06-28 03:49:35,990 INFO L125 PetriNetUnfolderBase]: For 246424/246426 co-relation queries the response was YES. [2024-06-28 03:49:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 5167 events. 3019/5167 cut-off events. For 246424/246426 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34340 event pairs, 1286 based on Foata normal form. 2/5168 useless extension candidates. Maximal degree in co-relation 29956. Up to 4720 conditions per place. [2024-06-28 03:49:36,041 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 40 changer transitions 0/269 dead transitions. [2024-06-28 03:49:36,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 269 transitions, 3207 flow [2024-06-28 03:49:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:49:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:49:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 03:49:36,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:49:36,046 INFO L175 Difference]: Start difference. First operand has 223 places, 242 transitions, 2430 flow. Second operand 9 states and 144 transitions. [2024-06-28 03:49:36,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 269 transitions, 3207 flow [2024-06-28 03:49:36,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 269 transitions, 3136 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:36,493 INFO L231 Difference]: Finished difference. Result has 228 places, 247 transitions, 2515 flow [2024-06-28 03:49:36,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2515, PETRI_PLACES=228, PETRI_TRANSITIONS=247} [2024-06-28 03:49:36,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-28 03:49:36,494 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 247 transitions, 2515 flow [2024-06-28 03:49:36,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:36,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:36,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:49:36,495 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:36,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1103594739, now seen corresponding path program 2 times [2024-06-28 03:49:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:36,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59883910] [2024-06-28 03:49:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:36,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:39,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59883910] [2024-06-28 03:49:39,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59883910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:39,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:39,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751591720] [2024-06-28 03:49:39,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:39,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:39,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:39,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 247 transitions, 2515 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:39,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:39,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:39,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:40,864 INFO L124 PetriNetUnfolderBase]: 3027/5180 cut-off events. [2024-06-28 03:49:40,864 INFO L125 PetriNetUnfolderBase]: For 253570/253575 co-relation queries the response was YES. [2024-06-28 03:49:40,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30284 conditions, 5180 events. 3027/5180 cut-off events. For 253570/253575 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34390 event pairs, 1291 based on Foata normal form. 4/5182 useless extension candidates. Maximal degree in co-relation 30180. Up to 4803 conditions per place. [2024-06-28 03:49:40,913 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 239 selfloop transitions, 19 changer transitions 0/263 dead transitions. [2024-06-28 03:49:40,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 263 transitions, 3109 flow [2024-06-28 03:49:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:49:40,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 03:49:40,914 INFO L175 Difference]: Start difference. First operand has 228 places, 247 transitions, 2515 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:49:40,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 263 transitions, 3109 flow [2024-06-28 03:49:41,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 263 transitions, 3020 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 03:49:41,330 INFO L231 Difference]: Finished difference. Result has 231 places, 249 transitions, 2517 flow [2024-06-28 03:49:41,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2517, PETRI_PLACES=231, PETRI_TRANSITIONS=249} [2024-06-28 03:49:41,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 03:49:41,330 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 249 transitions, 2517 flow [2024-06-28 03:49:41,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:41,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:41,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:49:41,331 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:41,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1358791113, now seen corresponding path program 3 times [2024-06-28 03:49:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:41,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928039043] [2024-06-28 03:49:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:44,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:44,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928039043] [2024-06-28 03:49:44,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928039043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:44,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:44,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:44,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342653869] [2024-06-28 03:49:44,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:44,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:44,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:44,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:44,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 249 transitions, 2517 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:44,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:44,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:44,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:45,504 INFO L124 PetriNetUnfolderBase]: 3022/5173 cut-off events. [2024-06-28 03:49:45,505 INFO L125 PetriNetUnfolderBase]: For 256368/256373 co-relation queries the response was YES. [2024-06-28 03:49:45,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30170 conditions, 5173 events. 3022/5173 cut-off events. For 256368/256373 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34404 event pairs, 1282 based on Foata normal form. 4/5175 useless extension candidates. Maximal degree in co-relation 30064. Up to 4776 conditions per place. [2024-06-28 03:49:45,555 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 236 selfloop transitions, 24 changer transitions 0/265 dead transitions. [2024-06-28 03:49:45,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 265 transitions, 3119 flow [2024-06-28 03:49:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:49:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:49:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:49:45,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 03:49:45,557 INFO L175 Difference]: Start difference. First operand has 231 places, 249 transitions, 2517 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:49:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 265 transitions, 3119 flow [2024-06-28 03:49:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 265 transitions, 3044 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:46,021 INFO L231 Difference]: Finished difference. Result has 233 places, 251 transitions, 2547 flow [2024-06-28 03:49:46,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2547, PETRI_PLACES=233, PETRI_TRANSITIONS=251} [2024-06-28 03:49:46,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 03:49:46,021 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 251 transitions, 2547 flow [2024-06-28 03:49:46,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:46,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:46,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:46,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:49:46,022 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:46,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1367368937, now seen corresponding path program 4 times [2024-06-28 03:49:46,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:46,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251233343] [2024-06-28 03:49:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:48,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:48,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251233343] [2024-06-28 03:49:48,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251233343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:48,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:48,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:49:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267170294] [2024-06-28 03:49:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:48,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:49:48,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:49:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:49:48,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:49:48,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 251 transitions, 2547 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:48,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:48,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:49:48,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:50,581 INFO L124 PetriNetUnfolderBase]: 3016/5165 cut-off events. [2024-06-28 03:49:50,581 INFO L125 PetriNetUnfolderBase]: For 258937/258939 co-relation queries the response was YES. [2024-06-28 03:49:50,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30111 conditions, 5165 events. 3016/5165 cut-off events. For 258937/258939 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34315 event pairs, 1304 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 30004. Up to 4720 conditions per place. [2024-06-28 03:49:50,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 39 changer transitions 0/267 dead transitions. [2024-06-28 03:49:50,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 267 transitions, 3109 flow [2024-06-28 03:49:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:49:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:49:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:49:50,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:49:50,642 INFO L175 Difference]: Start difference. First operand has 233 places, 251 transitions, 2547 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:49:50,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 267 transitions, 3109 flow [2024-06-28 03:49:51,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 267 transitions, 2996 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 03:49:51,148 INFO L231 Difference]: Finished difference. Result has 236 places, 251 transitions, 2518 flow [2024-06-28 03:49:51,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2518, PETRI_PLACES=236, PETRI_TRANSITIONS=251} [2024-06-28 03:49:51,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-28 03:49:51,149 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 251 transitions, 2518 flow [2024-06-28 03:49:51,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:51,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:51,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:51,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:49:51,149 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:51,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1338756850, now seen corresponding path program 1 times [2024-06-28 03:49:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650393048] [2024-06-28 03:49:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650393048] [2024-06-28 03:49:53,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650393048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:53,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:53,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:49:53,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328454765] [2024-06-28 03:49:53,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:49:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:49:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:49:53,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:49:53,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 251 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:53,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:53,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:49:53,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:49:55,673 INFO L124 PetriNetUnfolderBase]: 3056/5242 cut-off events. [2024-06-28 03:49:55,674 INFO L125 PetriNetUnfolderBase]: For 308169/308194 co-relation queries the response was YES. [2024-06-28 03:49:55,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31169 conditions, 5242 events. 3056/5242 cut-off events. For 308169/308194 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35375 event pairs, 912 based on Foata normal form. 25/5218 useless extension candidates. Maximal degree in co-relation 31061. Up to 4550 conditions per place. [2024-06-28 03:49:55,735 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 43 changer transitions 0/325 dead transitions. [2024-06-28 03:49:55,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 325 transitions, 3584 flow [2024-06-28 03:49:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:49:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:49:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 231 transitions. [2024-06-28 03:49:55,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-28 03:49:55,737 INFO L175 Difference]: Start difference. First operand has 236 places, 251 transitions, 2518 flow. Second operand 13 states and 231 transitions. [2024-06-28 03:49:55,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 325 transitions, 3584 flow [2024-06-28 03:49:56,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 325 transitions, 3464 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 03:49:56,149 INFO L231 Difference]: Finished difference. Result has 244 places, 267 transitions, 2667 flow [2024-06-28 03:49:56,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2667, PETRI_PLACES=244, PETRI_TRANSITIONS=267} [2024-06-28 03:49:56,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-28 03:49:56,150 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 267 transitions, 2667 flow [2024-06-28 03:49:56,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:56,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:49:56,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:49:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:49:56,151 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:49:56,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:49:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -517062356, now seen corresponding path program 2 times [2024-06-28 03:49:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:49:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270227917] [2024-06-28 03:49:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:49:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:49:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:49:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:49:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:49:58,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270227917] [2024-06-28 03:49:58,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270227917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:49:58,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:49:58,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:49:58,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972231396] [2024-06-28 03:49:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:49:58,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:49:58,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:49:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:49:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:49:58,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:49:58,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 267 transitions, 2667 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:49:58,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:49:58,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:49:58,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:00,234 INFO L124 PetriNetUnfolderBase]: 3038/5216 cut-off events. [2024-06-28 03:50:00,235 INFO L125 PetriNetUnfolderBase]: For 298454/298475 co-relation queries the response was YES. [2024-06-28 03:50:00,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31221 conditions, 5216 events. 3038/5216 cut-off events. For 298454/298475 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35260 event pairs, 898 based on Foata normal form. 21/5188 useless extension candidates. Maximal degree in co-relation 31109. Up to 4542 conditions per place. [2024-06-28 03:50:00,286 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 43 changer transitions 0/320 dead transitions. [2024-06-28 03:50:00,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 320 transitions, 3446 flow [2024-06-28 03:50:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:50:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:50:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-28 03:50:00,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42658730158730157 [2024-06-28 03:50:00,288 INFO L175 Difference]: Start difference. First operand has 244 places, 267 transitions, 2667 flow. Second operand 12 states and 215 transitions. [2024-06-28 03:50:00,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 320 transitions, 3446 flow [2024-06-28 03:50:00,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 320 transitions, 3353 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:50:00,686 INFO L231 Difference]: Finished difference. Result has 250 places, 268 transitions, 2684 flow [2024-06-28 03:50:00,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2684, PETRI_PLACES=250, PETRI_TRANSITIONS=268} [2024-06-28 03:50:00,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-28 03:50:00,687 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 268 transitions, 2684 flow [2024-06-28 03:50:00,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:00,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:00,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:00,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:50:00,688 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:00,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash -125580146, now seen corresponding path program 3 times [2024-06-28 03:50:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:00,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482737118] [2024-06-28 03:50:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482737118] [2024-06-28 03:50:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482737118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:02,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:02,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012039339] [2024-06-28 03:50:02,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:02,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:50:02,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 268 transitions, 2684 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:02,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:02,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:50:02,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:04,421 INFO L124 PetriNetUnfolderBase]: 3108/5332 cut-off events. [2024-06-28 03:50:04,421 INFO L125 PetriNetUnfolderBase]: For 306277/306298 co-relation queries the response was YES. [2024-06-28 03:50:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31983 conditions, 5332 events. 3108/5332 cut-off events. For 306277/306298 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35891 event pairs, 807 based on Foata normal form. 21/5320 useless extension candidates. Maximal degree in co-relation 31869. Up to 4464 conditions per place. [2024-06-28 03:50:04,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 48 changer transitions 0/324 dead transitions. [2024-06-28 03:50:04,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 324 transitions, 3671 flow [2024-06-28 03:50:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:50:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:50:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-28 03:50:04,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-28 03:50:04,475 INFO L175 Difference]: Start difference. First operand has 250 places, 268 transitions, 2684 flow. Second operand 11 states and 200 transitions. [2024-06-28 03:50:04,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 324 transitions, 3671 flow [2024-06-28 03:50:04,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 324 transitions, 3582 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 03:50:04,892 INFO L231 Difference]: Finished difference. Result has 253 places, 273 transitions, 2792 flow [2024-06-28 03:50:04,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2792, PETRI_PLACES=253, PETRI_TRANSITIONS=273} [2024-06-28 03:50:04,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-28 03:50:04,892 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 273 transitions, 2792 flow [2024-06-28 03:50:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:04,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:04,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:04,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:50:04,893 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:04,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -203617456, now seen corresponding path program 1 times [2024-06-28 03:50:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336193538] [2024-06-28 03:50:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:07,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:07,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336193538] [2024-06-28 03:50:07,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336193538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:07,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:07,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601067634] [2024-06-28 03:50:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:07,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:07,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:07,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:07,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:07,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 273 transitions, 2792 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) [2024-06-28 03:50:07,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:07,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:07,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:09,596 INFO L124 PetriNetUnfolderBase]: 3340/5673 cut-off events. [2024-06-28 03:50:09,597 INFO L125 PetriNetUnfolderBase]: For 300893/300897 co-relation queries the response was YES. [2024-06-28 03:50:09,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34818 conditions, 5673 events. 3340/5673 cut-off events. For 300893/300897 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37739 event pairs, 1005 based on Foata normal form. 6/5678 useless extension candidates. Maximal degree in co-relation 34702. Up to 5127 conditions per place. [2024-06-28 03:50:09,665 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 65 changer transitions 0/360 dead transitions. [2024-06-28 03:50:09,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 360 transitions, 4504 flow [2024-06-28 03:50:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:50:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:50:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 250 transitions. [2024-06-28 03:50:09,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 03:50:09,667 INFO L175 Difference]: Start difference. First operand has 253 places, 273 transitions, 2792 flow. Second operand 15 states and 250 transitions. [2024-06-28 03:50:09,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 360 transitions, 4504 flow [2024-06-28 03:50:10,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 360 transitions, 4397 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 03:50:10,399 INFO L231 Difference]: Finished difference. Result has 263 places, 298 transitions, 3241 flow [2024-06-28 03:50:10,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3241, PETRI_PLACES=263, PETRI_TRANSITIONS=298} [2024-06-28 03:50:10,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-28 03:50:10,400 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 298 transitions, 3241 flow [2024-06-28 03:50:10,400 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) [2024-06-28 03:50:10,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:10,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:10,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:50:10,400 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:10,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash -514202420, now seen corresponding path program 2 times [2024-06-28 03:50:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621300096] [2024-06-28 03:50:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621300096] [2024-06-28 03:50:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621300096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:12,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:12,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966130414] [2024-06-28 03:50:12,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:12,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:12,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:12,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:12,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 298 transitions, 3241 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:12,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:12,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:12,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:14,658 INFO L124 PetriNetUnfolderBase]: 3350/5687 cut-off events. [2024-06-28 03:50:14,658 INFO L125 PetriNetUnfolderBase]: For 311859/311863 co-relation queries the response was YES. [2024-06-28 03:50:14,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35616 conditions, 5687 events. 3350/5687 cut-off events. For 311859/311863 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37825 event pairs, 1004 based on Foata normal form. 6/5692 useless extension candidates. Maximal degree in co-relation 35497. Up to 5137 conditions per place. [2024-06-28 03:50:14,722 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 286 selfloop transitions, 69 changer transitions 0/360 dead transitions. [2024-06-28 03:50:14,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 360 transitions, 4652 flow [2024-06-28 03:50:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:50:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:50:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 236 transitions. [2024-06-28 03:50:14,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 03:50:14,724 INFO L175 Difference]: Start difference. First operand has 263 places, 298 transitions, 3241 flow. Second operand 14 states and 236 transitions. [2024-06-28 03:50:14,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 360 transitions, 4652 flow [2024-06-28 03:50:15,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 360 transitions, 4483 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-28 03:50:15,324 INFO L231 Difference]: Finished difference. Result has 270 places, 303 transitions, 3327 flow [2024-06-28 03:50:15,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3327, PETRI_PLACES=270, PETRI_TRANSITIONS=303} [2024-06-28 03:50:15,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-28 03:50:15,325 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 303 transitions, 3327 flow [2024-06-28 03:50:15,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:15,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:15,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:15,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:50:15,326 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:15,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 129693310, now seen corresponding path program 3 times [2024-06-28 03:50:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:15,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972362716] [2024-06-28 03:50:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972362716] [2024-06-28 03:50:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972362716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:17,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:17,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829106035] [2024-06-28 03:50:17,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:17,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:17,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:17,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:17,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 303 transitions, 3327 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) [2024-06-28 03:50:17,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:17,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:17,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:19,928 INFO L124 PetriNetUnfolderBase]: 3344/5679 cut-off events. [2024-06-28 03:50:19,928 INFO L125 PetriNetUnfolderBase]: For 313484/313488 co-relation queries the response was YES. [2024-06-28 03:50:19,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35626 conditions, 5679 events. 3344/5679 cut-off events. For 313484/313488 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37776 event pairs, 1002 based on Foata normal form. 6/5684 useless extension candidates. Maximal degree in co-relation 35504. Up to 5132 conditions per place. [2024-06-28 03:50:19,995 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 71 changer transitions 0/356 dead transitions. [2024-06-28 03:50:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 356 transitions, 4497 flow [2024-06-28 03:50:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:50:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:50:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 230 transitions. [2024-06-28 03:50:19,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:50:19,997 INFO L175 Difference]: Start difference. First operand has 270 places, 303 transitions, 3327 flow. Second operand 14 states and 230 transitions. [2024-06-28 03:50:19,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 356 transitions, 4497 flow [2024-06-28 03:50:20,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 356 transitions, 4301 flow, removed 39 selfloop flow, removed 12 redundant places. [2024-06-28 03:50:20,714 INFO L231 Difference]: Finished difference. Result has 273 places, 305 transitions, 3329 flow [2024-06-28 03:50:20,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3329, PETRI_PLACES=273, PETRI_TRANSITIONS=305} [2024-06-28 03:50:20,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:50:20,715 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 305 transitions, 3329 flow [2024-06-28 03:50:20,715 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) [2024-06-28 03:50:20,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:20,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:20,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:50:20,716 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:20,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash -53375740, now seen corresponding path program 4 times [2024-06-28 03:50:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:20,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641422466] [2024-06-28 03:50:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:23,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641422466] [2024-06-28 03:50:23,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641422466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:23,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:23,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:23,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971931552] [2024-06-28 03:50:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:23,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:23,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:23,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:50:23,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 305 transitions, 3329 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:23,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:23,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:50:23,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:25,487 INFO L124 PetriNetUnfolderBase]: 3431/5855 cut-off events. [2024-06-28 03:50:25,488 INFO L125 PetriNetUnfolderBase]: For 330987/330993 co-relation queries the response was YES. [2024-06-28 03:50:25,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 5855 events. 3431/5855 cut-off events. For 330987/330993 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 39663 event pairs, 741 based on Foata normal form. 12/5820 useless extension candidates. Maximal degree in co-relation 36459. Up to 5024 conditions per place. [2024-06-28 03:50:25,553 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 55 changer transitions 0/376 dead transitions. [2024-06-28 03:50:25,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 376 transitions, 4469 flow [2024-06-28 03:50:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:50:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:50:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-28 03:50:25,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-28 03:50:25,555 INFO L175 Difference]: Start difference. First operand has 273 places, 305 transitions, 3329 flow. Second operand 12 states and 217 transitions. [2024-06-28 03:50:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 376 transitions, 4469 flow [2024-06-28 03:50:26,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 376 transitions, 4326 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 03:50:26,271 INFO L231 Difference]: Finished difference. Result has 277 places, 325 transitions, 3614 flow [2024-06-28 03:50:26,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3614, PETRI_PLACES=277, PETRI_TRANSITIONS=325} [2024-06-28 03:50:26,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 03:50:26,272 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 325 transitions, 3614 flow [2024-06-28 03:50:26,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:26,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:26,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:50:26,273 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:26,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash -50515804, now seen corresponding path program 4 times [2024-06-28 03:50:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:26,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869902585] [2024-06-28 03:50:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:26,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:28,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:28,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869902585] [2024-06-28 03:50:28,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869902585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:28,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:28,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:28,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106857780] [2024-06-28 03:50:28,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:28,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:28,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:28,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 325 transitions, 3614 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:28,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:28,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:28,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:30,573 INFO L124 PetriNetUnfolderBase]: 3636/6123 cut-off events. [2024-06-28 03:50:30,574 INFO L125 PetriNetUnfolderBase]: For 337823/337827 co-relation queries the response was YES. [2024-06-28 03:50:30,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38669 conditions, 6123 events. 3636/6123 cut-off events. For 337823/337827 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40849 event pairs, 824 based on Foata normal form. 8/6130 useless extension candidates. Maximal degree in co-relation 38543. Up to 5601 conditions per place. [2024-06-28 03:50:30,648 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 310 selfloop transitions, 68 changer transitions 0/383 dead transitions. [2024-06-28 03:50:30,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 383 transitions, 4855 flow [2024-06-28 03:50:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:50:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:50:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-28 03:50:30,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:50:30,649 INFO L175 Difference]: Start difference. First operand has 277 places, 325 transitions, 3614 flow. Second operand 12 states and 202 transitions. [2024-06-28 03:50:30,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 383 transitions, 4855 flow [2024-06-28 03:50:31,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 383 transitions, 4773 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:50:31,443 INFO L231 Difference]: Finished difference. Result has 284 places, 340 transitions, 3933 flow [2024-06-28 03:50:31,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3933, PETRI_PLACES=284, PETRI_TRANSITIONS=340} [2024-06-28 03:50:31,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 03:50:31,444 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 340 transitions, 3933 flow [2024-06-28 03:50:31,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:31,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:31,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:50:31,445 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:31,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash -205854794, now seen corresponding path program 5 times [2024-06-28 03:50:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:31,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846186486] [2024-06-28 03:50:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:31,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:34,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:34,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846186486] [2024-06-28 03:50:34,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846186486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:34,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:34,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438270126] [2024-06-28 03:50:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:34,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:34,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:34,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:34,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 340 transitions, 3933 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) [2024-06-28 03:50:34,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:34,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:34,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:36,649 INFO L124 PetriNetUnfolderBase]: 3656/6155 cut-off events. [2024-06-28 03:50:36,650 INFO L125 PetriNetUnfolderBase]: For 340104/340108 co-relation queries the response was YES. [2024-06-28 03:50:36,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39041 conditions, 6155 events. 3656/6155 cut-off events. For 340104/340108 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41098 event pairs, 824 based on Foata normal form. 6/6160 useless extension candidates. Maximal degree in co-relation 38913. Up to 5617 conditions per place. [2024-06-28 03:50:36,727 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 314 selfloop transitions, 74 changer transitions 0/393 dead transitions. [2024-06-28 03:50:36,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 393 transitions, 5101 flow [2024-06-28 03:50:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:50:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:50:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2024-06-28 03:50:36,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 03:50:36,729 INFO L175 Difference]: Start difference. First operand has 284 places, 340 transitions, 3933 flow. Second operand 14 states and 228 transitions. [2024-06-28 03:50:36,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 393 transitions, 5101 flow [2024-06-28 03:50:37,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 393 transitions, 4967 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-28 03:50:37,580 INFO L231 Difference]: Finished difference. Result has 290 places, 346 transitions, 4062 flow [2024-06-28 03:50:37,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3802, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4062, PETRI_PLACES=290, PETRI_TRANSITIONS=346} [2024-06-28 03:50:37,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 03:50:37,581 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 346 transitions, 4062 flow [2024-06-28 03:50:37,581 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) [2024-06-28 03:50:37,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:37,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:50:37,582 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:37,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2114050124, now seen corresponding path program 1 times [2024-06-28 03:50:37,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:37,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370196052] [2024-06-28 03:50:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:37,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:39,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:39,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370196052] [2024-06-28 03:50:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370196052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262993186] [2024-06-28 03:50:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:39,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:39,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:39,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 346 transitions, 4062 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:39,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:39,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:39,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:42,564 INFO L124 PetriNetUnfolderBase]: 3916/6552 cut-off events. [2024-06-28 03:50:42,565 INFO L125 PetriNetUnfolderBase]: For 385776/385780 co-relation queries the response was YES. [2024-06-28 03:50:42,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42185 conditions, 6552 events. 3916/6552 cut-off events. For 385776/385780 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43993 event pairs, 1166 based on Foata normal form. 8/6555 useless extension candidates. Maximal degree in co-relation 42055. Up to 5770 conditions per place. [2024-06-28 03:50:42,645 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 342 selfloop transitions, 108 changer transitions 0/455 dead transitions. [2024-06-28 03:50:42,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 455 transitions, 6240 flow [2024-06-28 03:50:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:50:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:50:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-06-28 03:50:42,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2024-06-28 03:50:42,647 INFO L175 Difference]: Start difference. First operand has 290 places, 346 transitions, 4062 flow. Second operand 13 states and 226 transitions. [2024-06-28 03:50:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 455 transitions, 6240 flow [2024-06-28 03:50:43,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 455 transitions, 6052 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-28 03:50:43,551 INFO L231 Difference]: Finished difference. Result has 295 places, 402 transitions, 4756 flow [2024-06-28 03:50:43,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4756, PETRI_PLACES=295, PETRI_TRANSITIONS=402} [2024-06-28 03:50:43,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 03:50:43,552 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 402 transitions, 4756 flow [2024-06-28 03:50:43,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:43,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:43,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:43,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:50:43,552 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:43,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2114228870, now seen corresponding path program 6 times [2024-06-28 03:50:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:43,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69375523] [2024-06-28 03:50:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:45,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:45,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69375523] [2024-06-28 03:50:45,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69375523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:45,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:45,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:45,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144138192] [2024-06-28 03:50:45,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:45,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:45,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:45,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 402 transitions, 4756 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:45,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:45,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:45,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:48,359 INFO L124 PetriNetUnfolderBase]: 4005/6681 cut-off events. [2024-06-28 03:50:48,359 INFO L125 PetriNetUnfolderBase]: For 412367/412370 co-relation queries the response was YES. [2024-06-28 03:50:48,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44844 conditions, 6681 events. 4005/6681 cut-off events. For 412367/412370 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 44726 event pairs, 833 based on Foata normal form. 4/6683 useless extension candidates. Maximal degree in co-relation 44710. Up to 5834 conditions per place. [2024-06-28 03:50:48,442 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 154 changer transitions 0/476 dead transitions. [2024-06-28 03:50:48,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 476 transitions, 6884 flow [2024-06-28 03:50:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:50:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:50:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 221 transitions. [2024-06-28 03:50:48,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:50:48,444 INFO L175 Difference]: Start difference. First operand has 295 places, 402 transitions, 4756 flow. Second operand 13 states and 221 transitions. [2024-06-28 03:50:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 476 transitions, 6884 flow [2024-06-28 03:50:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 476 transitions, 6699 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-28 03:50:49,391 INFO L231 Difference]: Finished difference. Result has 305 places, 430 transitions, 5337 flow [2024-06-28 03:50:49,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5337, PETRI_PLACES=305, PETRI_TRANSITIONS=430} [2024-06-28 03:50:49,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-28 03:50:49,392 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 430 transitions, 5337 flow [2024-06-28 03:50:49,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:49,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:49,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:49,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:50:49,392 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:49,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:49,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2113900580, now seen corresponding path program 7 times [2024-06-28 03:50:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:49,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562341542] [2024-06-28 03:50:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:49,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:51,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:51,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562341542] [2024-06-28 03:50:51,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562341542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:51,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:51,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:50:51,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579311107] [2024-06-28 03:50:51,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:51,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:50:51,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:50:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:50:51,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:51,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 430 transitions, 5337 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) [2024-06-28 03:50:51,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:51,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:51,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:50:54,506 INFO L124 PetriNetUnfolderBase]: 4015/6699 cut-off events. [2024-06-28 03:50:54,507 INFO L125 PetriNetUnfolderBase]: For 427592/427595 co-relation queries the response was YES. [2024-06-28 03:50:54,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45898 conditions, 6699 events. 4015/6699 cut-off events. For 427592/427595 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44863 event pairs, 833 based on Foata normal form. 4/6701 useless extension candidates. Maximal degree in co-relation 45763. Up to 5844 conditions per place. [2024-06-28 03:50:54,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 155 changer transitions 0/473 dead transitions. [2024-06-28 03:50:54,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 473 transitions, 6949 flow [2024-06-28 03:50:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:50:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:50:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-28 03:50:54,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-28 03:50:54,593 INFO L175 Difference]: Start difference. First operand has 305 places, 430 transitions, 5337 flow. Second operand 12 states and 205 transitions. [2024-06-28 03:50:54,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 473 transitions, 6949 flow [2024-06-28 03:50:55,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 473 transitions, 6732 flow, removed 98 selfloop flow, removed 4 redundant places. [2024-06-28 03:50:55,607 INFO L231 Difference]: Finished difference. Result has 313 places, 433 transitions, 5508 flow [2024-06-28 03:50:55,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5148, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5508, PETRI_PLACES=313, PETRI_TRANSITIONS=433} [2024-06-28 03:50:55,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 03:50:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 433 transitions, 5508 flow [2024-06-28 03:50:55,608 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) [2024-06-28 03:50:55,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:50:55,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:50:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:50:55,608 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:50:55,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:50:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2113900394, now seen corresponding path program 2 times [2024-06-28 03:50:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:50:55,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197052783] [2024-06-28 03:50:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:50:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:50:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:50:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:50:57,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:50:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197052783] [2024-06-28 03:50:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197052783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:50:57,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:50:57,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:50:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577039001] [2024-06-28 03:50:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:50:57,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:50:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:50:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:50:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:50:57,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:50:57,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 433 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:50:57,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:50:57,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:50:57,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:00,408 INFO L124 PetriNetUnfolderBase]: 4025/6725 cut-off events. [2024-06-28 03:51:00,408 INFO L125 PetriNetUnfolderBase]: For 438632/438636 co-relation queries the response was YES. [2024-06-28 03:51:00,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46241 conditions, 6725 events. 4025/6725 cut-off events. For 438632/438636 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 45258 event pairs, 1171 based on Foata normal form. 6/6726 useless extension candidates. Maximal degree in co-relation 46106. Up to 5919 conditions per place. [2024-06-28 03:51:00,488 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 365 selfloop transitions, 110 changer transitions 0/480 dead transitions. [2024-06-28 03:51:00,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 480 transitions, 7134 flow [2024-06-28 03:51:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:51:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:51:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-28 03:51:00,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:51:00,491 INFO L175 Difference]: Start difference. First operand has 313 places, 433 transitions, 5508 flow. Second operand 12 states and 213 transitions. [2024-06-28 03:51:00,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 480 transitions, 7134 flow [2024-06-28 03:51:01,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 480 transitions, 6846 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 03:51:01,476 INFO L231 Difference]: Finished difference. Result has 317 places, 436 transitions, 5472 flow [2024-06-28 03:51:01,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5472, PETRI_PLACES=317, PETRI_TRANSITIONS=436} [2024-06-28 03:51:01,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 03:51:01,476 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 436 transitions, 5472 flow [2024-06-28 03:51:01,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:01,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:01,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:01,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:51:01,477 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:01,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash 271757096, now seen corresponding path program 8 times [2024-06-28 03:51:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:01,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440062134] [2024-06-28 03:51:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:03,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440062134] [2024-06-28 03:51:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440062134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:03,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285226011] [2024-06-28 03:51:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:03,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:03,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:03,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 436 transitions, 5472 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) [2024-06-28 03:51:03,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:03,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:03,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:06,277 INFO L124 PetriNetUnfolderBase]: 4019/6707 cut-off events. [2024-06-28 03:51:06,277 INFO L125 PetriNetUnfolderBase]: For 440371/440376 co-relation queries the response was YES. [2024-06-28 03:51:06,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46010 conditions, 6707 events. 4019/6707 cut-off events. For 440371/440376 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44956 event pairs, 856 based on Foata normal form. 6/6711 useless extension candidates. Maximal degree in co-relation 45874. Up to 5853 conditions per place. [2024-06-28 03:51:06,355 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 151 changer transitions 0/469 dead transitions. [2024-06-28 03:51:06,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 469 transitions, 6986 flow [2024-06-28 03:51:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 03:51:06,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:51:06,357 INFO L175 Difference]: Start difference. First operand has 317 places, 436 transitions, 5472 flow. Second operand 10 states and 174 transitions. [2024-06-28 03:51:06,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 469 transitions, 6986 flow [2024-06-28 03:51:07,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 469 transitions, 6740 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-28 03:51:07,584 INFO L231 Difference]: Finished difference. Result has 319 places, 436 transitions, 5534 flow [2024-06-28 03:51:07,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5534, PETRI_PLACES=319, PETRI_TRANSITIONS=436} [2024-06-28 03:51:07,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:51:07,584 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 436 transitions, 5534 flow [2024-06-28 03:51:07,585 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) [2024-06-28 03:51:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:07,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:07,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:51:07,585 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:07,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash 271757282, now seen corresponding path program 3 times [2024-06-28 03:51:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:07,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381381384] [2024-06-28 03:51:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:09,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381381384] [2024-06-28 03:51:09,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381381384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:09,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:09,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:09,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368249049] [2024-06-28 03:51:09,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:09,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:09,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:09,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:09,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 436 transitions, 5534 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:09,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:09,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:09,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:12,155 INFO L124 PetriNetUnfolderBase]: 4013/6712 cut-off events. [2024-06-28 03:51:12,156 INFO L125 PetriNetUnfolderBase]: For 444977/444983 co-relation queries the response was YES. [2024-06-28 03:51:12,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45995 conditions, 6712 events. 4013/6712 cut-off events. For 444977/444983 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 45224 event pairs, 1190 based on Foata normal form. 8/6715 useless extension candidates. Maximal degree in co-relation 45858. Up to 5906 conditions per place. [2024-06-28 03:51:12,234 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 357 selfloop transitions, 109 changer transitions 0/471 dead transitions. [2024-06-28 03:51:12,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 471 transitions, 6924 flow [2024-06-28 03:51:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 03:51:12,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 03:51:12,244 INFO L175 Difference]: Start difference. First operand has 319 places, 436 transitions, 5534 flow. Second operand 10 states and 178 transitions. [2024-06-28 03:51:12,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 471 transitions, 6924 flow [2024-06-28 03:51:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 471 transitions, 6558 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 03:51:13,404 INFO L231 Difference]: Finished difference. Result has 319 places, 436 transitions, 5392 flow [2024-06-28 03:51:13,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5392, PETRI_PLACES=319, PETRI_TRANSITIONS=436} [2024-06-28 03:51:13,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:51:13,405 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 436 transitions, 5392 flow [2024-06-28 03:51:13,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:13,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:13,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:13,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:51:13,406 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:13,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:13,406 INFO L85 PathProgramCache]: Analyzing trace with hash 271637126, now seen corresponding path program 9 times [2024-06-28 03:51:13,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:13,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471480950] [2024-06-28 03:51:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:13,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:16,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:16,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471480950] [2024-06-28 03:51:16,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471480950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:16,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:51:16,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52477186] [2024-06-28 03:51:16,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:16,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:51:16,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:51:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:51:16,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:16,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 436 transitions, 5392 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) [2024-06-28 03:51:16,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:16,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:18,376 INFO L124 PetriNetUnfolderBase]: 4007/6686 cut-off events. [2024-06-28 03:51:18,377 INFO L125 PetriNetUnfolderBase]: For 445237/445237 co-relation queries the response was YES. [2024-06-28 03:51:18,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45706 conditions, 6686 events. 4007/6686 cut-off events. For 445237/445237 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44728 event pairs, 853 based on Foata normal form. 2/6687 useless extension candidates. Maximal degree in co-relation 45568. Up to 6172 conditions per place. [2024-06-28 03:51:18,457 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 412 selfloop transitions, 49 changer transitions 0/466 dead transitions. [2024-06-28 03:51:18,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 466 transitions, 6414 flow [2024-06-28 03:51:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 03:51:18,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:51:18,463 INFO L175 Difference]: Start difference. First operand has 319 places, 436 transitions, 5392 flow. Second operand 10 states and 165 transitions. [2024-06-28 03:51:18,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 466 transitions, 6414 flow [2024-06-28 03:51:19,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 466 transitions, 6158 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-28 03:51:19,745 INFO L231 Difference]: Finished difference. Result has 320 places, 436 transitions, 5240 flow [2024-06-28 03:51:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5136, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5240, PETRI_PLACES=320, PETRI_TRANSITIONS=436} [2024-06-28 03:51:19,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-28 03:51:19,761 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 436 transitions, 5240 flow [2024-06-28 03:51:19,761 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) [2024-06-28 03:51:19,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:19,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:19,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:51:19,762 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:19,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:19,762 INFO L85 PathProgramCache]: Analyzing trace with hash 608567830, now seen corresponding path program 5 times [2024-06-28 03:51:19,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:19,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298506579] [2024-06-28 03:51:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:19,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298506579] [2024-06-28 03:51:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298506579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:22,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047286874] [2024-06-28 03:51:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:22,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:22,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:22,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:51:22,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 436 transitions, 5240 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) [2024-06-28 03:51:22,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:22,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:51:22,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:24,591 INFO L124 PetriNetUnfolderBase]: 3788/6400 cut-off events. [2024-06-28 03:51:24,591 INFO L125 PetriNetUnfolderBase]: For 456016/456031 co-relation queries the response was YES. [2024-06-28 03:51:24,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43036 conditions, 6400 events. 3788/6400 cut-off events. For 456016/456031 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 43647 event pairs, 848 based on Foata normal form. 16/6376 useless extension candidates. Maximal degree in co-relation 42897. Up to 5183 conditions per place. [2024-06-28 03:51:24,670 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 350 selfloop transitions, 70 changer transitions 0/479 dead transitions. [2024-06-28 03:51:24,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 479 transitions, 6298 flow [2024-06-28 03:51:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 03:51:24,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:51:24,672 INFO L175 Difference]: Start difference. First operand has 320 places, 436 transitions, 5240 flow. Second operand 10 states and 180 transitions. [2024-06-28 03:51:24,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 479 transitions, 6298 flow [2024-06-28 03:51:25,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 479 transitions, 6161 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 03:51:25,642 INFO L231 Difference]: Finished difference. Result has 320 places, 436 transitions, 5259 flow [2024-06-28 03:51:25,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5259, PETRI_PLACES=320, PETRI_TRANSITIONS=436} [2024-06-28 03:51:25,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-28 03:51:25,643 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 436 transitions, 5259 flow [2024-06-28 03:51:25,643 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) [2024-06-28 03:51:25,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:25,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:25,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:51:25,643 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:25,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1276345226, now seen corresponding path program 10 times [2024-06-28 03:51:25,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:25,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366258934] [2024-06-28 03:51:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:28,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:28,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366258934] [2024-06-28 03:51:28,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366258934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:28,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:28,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110496374] [2024-06-28 03:51:28,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:28,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:28,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:28,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:28,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 436 transitions, 5259 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:28,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:28,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:28,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:30,561 INFO L124 PetriNetUnfolderBase]: 3993/6677 cut-off events. [2024-06-28 03:51:30,563 INFO L125 PetriNetUnfolderBase]: For 437612/437616 co-relation queries the response was YES. [2024-06-28 03:51:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45003 conditions, 6677 events. 3993/6677 cut-off events. For 437612/437616 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 44927 event pairs, 1097 based on Foata normal form. 8/6684 useless extension candidates. Maximal degree in co-relation 44863. Up to 6026 conditions per place. [2024-06-28 03:51:30,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 102 changer transitions 0/475 dead transitions. [2024-06-28 03:51:30,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 475 transitions, 6554 flow [2024-06-28 03:51:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 03:51:30,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 03:51:30,635 INFO L175 Difference]: Start difference. First operand has 320 places, 436 transitions, 5259 flow. Second operand 10 states and 169 transitions. [2024-06-28 03:51:30,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 475 transitions, 6554 flow [2024-06-28 03:51:31,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 475 transitions, 6398 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-28 03:51:31,771 INFO L231 Difference]: Finished difference. Result has 321 places, 439 transitions, 5402 flow [2024-06-28 03:51:31,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5402, PETRI_PLACES=321, PETRI_TRANSITIONS=439} [2024-06-28 03:51:31,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-28 03:51:31,785 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 439 transitions, 5402 flow [2024-06-28 03:51:31,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:31,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:31,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:31,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:51:31,785 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:31,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 821788588, now seen corresponding path program 11 times [2024-06-28 03:51:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:31,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838192164] [2024-06-28 03:51:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:31,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838192164] [2024-06-28 03:51:34,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838192164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:34,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:34,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669996421] [2024-06-28 03:51:34,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:34,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:34,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:34,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 439 transitions, 5402 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:34,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:34,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:34,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:36,844 INFO L124 PetriNetUnfolderBase]: 4013/6709 cut-off events. [2024-06-28 03:51:36,845 INFO L125 PetriNetUnfolderBase]: For 413010/413014 co-relation queries the response was YES. [2024-06-28 03:51:36,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44907 conditions, 6709 events. 4013/6709 cut-off events. For 413010/413014 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 45126 event pairs, 1097 based on Foata normal form. 6/6714 useless extension candidates. Maximal degree in co-relation 44768. Up to 6042 conditions per place. [2024-06-28 03:51:36,937 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 108 changer transitions 0/485 dead transitions. [2024-06-28 03:51:36,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 485 transitions, 6772 flow [2024-06-28 03:51:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:51:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:51:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-28 03:51:36,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:51:36,939 INFO L175 Difference]: Start difference. First operand has 321 places, 439 transitions, 5402 flow. Second operand 12 states and 195 transitions. [2024-06-28 03:51:36,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 485 transitions, 6772 flow [2024-06-28 03:51:38,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 485 transitions, 6581 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 03:51:38,093 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 5559 flow [2024-06-28 03:51:38,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5559, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-28 03:51:38,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-28 03:51:38,094 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 5559 flow [2024-06-28 03:51:38,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:38,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:38,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:38,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:51:38,094 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:38,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 726897682, now seen corresponding path program 4 times [2024-06-28 03:51:38,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:38,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233807238] [2024-06-28 03:51:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:38,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:40,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:40,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233807238] [2024-06-28 03:51:40,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233807238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:40,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:40,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:40,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127106838] [2024-06-28 03:51:40,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:40,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:40,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:40,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:40,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 5559 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:40,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:40,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:40,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:42,951 INFO L124 PetriNetUnfolderBase]: 4191/6973 cut-off events. [2024-06-28 03:51:42,952 INFO L125 PetriNetUnfolderBase]: For 439823/439836 co-relation queries the response was YES. [2024-06-28 03:51:43,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46485 conditions, 6973 events. 4191/6973 cut-off events. For 439823/439836 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 46876 event pairs, 1204 based on Foata normal form. 15/6981 useless extension candidates. Maximal degree in co-relation 46346. Up to 6102 conditions per place. [2024-06-28 03:51:43,045 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 380 selfloop transitions, 140 changer transitions 0/525 dead transitions. [2024-06-28 03:51:43,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 525 transitions, 7540 flow [2024-06-28 03:51:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:51:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:51:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-28 03:51:43,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-28 03:51:43,047 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 5559 flow. Second operand 12 states and 197 transitions. [2024-06-28 03:51:43,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 525 transitions, 7540 flow [2024-06-28 03:51:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 525 transitions, 7269 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-28 03:51:44,207 INFO L231 Difference]: Finished difference. Result has 332 places, 490 transitions, 6256 flow [2024-06-28 03:51:44,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6256, PETRI_PLACES=332, PETRI_TRANSITIONS=490} [2024-06-28 03:51:44,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 03:51:44,207 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 490 transitions, 6256 flow [2024-06-28 03:51:44,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:44,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:44,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:44,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:51:44,208 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:44,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 726718936, now seen corresponding path program 12 times [2024-06-28 03:51:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283242025] [2024-06-28 03:51:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:44,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:46,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:46,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283242025] [2024-06-28 03:51:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283242025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:46,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708683172] [2024-06-28 03:51:46,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:46,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:46,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:46,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:46,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 490 transitions, 6256 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:46,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:46,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:46,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:49,027 INFO L124 PetriNetUnfolderBase]: 4243/7035 cut-off events. [2024-06-28 03:51:49,027 INFO L125 PetriNetUnfolderBase]: For 430460/430463 co-relation queries the response was YES. [2024-06-28 03:51:49,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47812 conditions, 7035 events. 4243/7035 cut-off events. For 430460/430463 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 47082 event pairs, 830 based on Foata normal form. 6/7039 useless extension candidates. Maximal degree in co-relation 47669. Up to 6085 conditions per place. [2024-06-28 03:51:49,119 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 193 changer transitions 0/541 dead transitions. [2024-06-28 03:51:49,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 541 transitions, 8197 flow [2024-06-28 03:51:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:51:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:51:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 03:51:49,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-28 03:51:49,121 INFO L175 Difference]: Start difference. First operand has 332 places, 490 transitions, 6256 flow. Second operand 11 states and 185 transitions. [2024-06-28 03:51:49,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 541 transitions, 8197 flow [2024-06-28 03:51:50,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 541 transitions, 8018 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 03:51:50,260 INFO L231 Difference]: Finished difference. Result has 340 places, 502 transitions, 6701 flow [2024-06-28 03:51:50,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6701, PETRI_PLACES=340, PETRI_TRANSITIONS=502} [2024-06-28 03:51:50,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-28 03:51:50,260 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 502 transitions, 6701 flow [2024-06-28 03:51:50,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:50,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:50,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:50,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:51:50,261 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:50,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 727047226, now seen corresponding path program 13 times [2024-06-28 03:51:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:50,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656062409] [2024-06-28 03:51:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:50,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:53,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656062409] [2024-06-28 03:51:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656062409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:53,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:53,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:53,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371366366] [2024-06-28 03:51:53,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:53,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:53,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:53,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:53,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 502 transitions, 6701 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:53,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:53,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:53,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:55,142 INFO L124 PetriNetUnfolderBase]: 4247/7045 cut-off events. [2024-06-28 03:51:55,143 INFO L125 PetriNetUnfolderBase]: For 435106/435109 co-relation queries the response was YES. [2024-06-28 03:51:55,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47962 conditions, 7045 events. 4247/7045 cut-off events. For 435106/435109 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 47250 event pairs, 830 based on Foata normal form. 6/7049 useless extension candidates. Maximal degree in co-relation 47817. Up to 6090 conditions per place. [2024-06-28 03:51:55,230 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 344 selfloop transitions, 189 changer transitions 0/538 dead transitions. [2024-06-28 03:51:55,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 538 transitions, 8290 flow [2024-06-28 03:51:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:51:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:51:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 03:51:55,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 03:51:55,232 INFO L175 Difference]: Start difference. First operand has 340 places, 502 transitions, 6701 flow. Second operand 10 states and 169 transitions. [2024-06-28 03:51:55,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 538 transitions, 8290 flow [2024-06-28 03:51:56,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 538 transitions, 7923 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-28 03:51:56,478 INFO L231 Difference]: Finished difference. Result has 343 places, 505 transitions, 6793 flow [2024-06-28 03:51:56,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6793, PETRI_PLACES=343, PETRI_TRANSITIONS=505} [2024-06-28 03:51:56,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-28 03:51:56,478 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 505 transitions, 6793 flow [2024-06-28 03:51:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:56,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:56,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:51:56,479 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:56,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash 727047412, now seen corresponding path program 5 times [2024-06-28 03:51:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:56,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047754804] [2024-06-28 03:51:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:59,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:59,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047754804] [2024-06-28 03:51:59,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047754804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:59,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:59,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:51:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508503629] [2024-06-28 03:51:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:51:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:51:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:51:59,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:59,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 505 transitions, 6793 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:59,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:59,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:59,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:01,265 INFO L124 PetriNetUnfolderBase]: 4251/7053 cut-off events. [2024-06-28 03:52:01,265 INFO L125 PetriNetUnfolderBase]: For 431524/431528 co-relation queries the response was YES. [2024-06-28 03:52:01,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47725 conditions, 7053 events. 4251/7053 cut-off events. For 431524/431528 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 47445 event pairs, 1176 based on Foata normal form. 8/7056 useless extension candidates. Maximal degree in co-relation 47580. Up to 6137 conditions per place. [2024-06-28 03:52:01,354 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 380 selfloop transitions, 156 changer transitions 0/541 dead transitions. [2024-06-28 03:52:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 541 transitions, 8354 flow [2024-06-28 03:52:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 03:52:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:52:01,356 INFO L175 Difference]: Start difference. First operand has 343 places, 505 transitions, 6793 flow. Second operand 10 states and 175 transitions. [2024-06-28 03:52:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 541 transitions, 8354 flow [2024-06-28 03:52:02,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 541 transitions, 7953 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-28 03:52:02,525 INFO L231 Difference]: Finished difference. Result has 345 places, 508 transitions, 6758 flow [2024-06-28 03:52:02,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6758, PETRI_PLACES=345, PETRI_TRANSITIONS=508} [2024-06-28 03:52:02,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 03:52:02,526 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 508 transitions, 6758 flow [2024-06-28 03:52:02,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:02,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:02,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:52:02,527 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:02,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1913898834, now seen corresponding path program 14 times [2024-06-28 03:52:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:02,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419277775] [2024-06-28 03:52:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419277775] [2024-06-28 03:52:05,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419277775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:05,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:05,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:05,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192693837] [2024-06-28 03:52:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:05,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 508 transitions, 6758 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:07,622 INFO L124 PetriNetUnfolderBase]: 4245/7041 cut-off events. [2024-06-28 03:52:07,622 INFO L125 PetriNetUnfolderBase]: For 416341/416341 co-relation queries the response was YES. [2024-06-28 03:52:07,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47392 conditions, 7041 events. 4245/7041 cut-off events. For 416341/416341 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 47191 event pairs, 869 based on Foata normal form. 2/7042 useless extension candidates. Maximal degree in co-relation 47247. Up to 6477 conditions per place. [2024-06-28 03:52:07,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 57 changer transitions 0/530 dead transitions. [2024-06-28 03:52:07,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 530 transitions, 7888 flow [2024-06-28 03:52:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:52:07,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:52:07,704 INFO L175 Difference]: Start difference. First operand has 345 places, 508 transitions, 6758 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:52:07,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 530 transitions, 7888 flow [2024-06-28 03:52:08,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 530 transitions, 7540 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-28 03:52:08,869 INFO L231 Difference]: Finished difference. Result has 345 places, 508 transitions, 6534 flow [2024-06-28 03:52:08,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6410, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6534, PETRI_PLACES=345, PETRI_TRANSITIONS=508} [2024-06-28 03:52:08,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 03:52:08,870 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 508 transitions, 6534 flow [2024-06-28 03:52:08,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:08,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:08,870 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] [2024-06-28 03:52:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:52:08,870 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)] === [2024-06-28 03:52:08,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash 933700666, now seen corresponding path program 15 times [2024-06-28 03:52:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066991417] [2024-06-28 03:52:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:11,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066991417] [2024-06-28 03:52:11,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066991417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:11,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:11,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408615266] [2024-06-28 03:52:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:11,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:11,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:11,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 508 transitions, 6534 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:11,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:11,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:11,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:13,514 INFO L124 PetriNetUnfolderBase]: 4239/7039 cut-off events. [2024-06-28 03:52:13,514 INFO L125 PetriNetUnfolderBase]: For 408440/408445 co-relation queries the response was YES. [2024-06-28 03:52:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46710 conditions, 7039 events. 4239/7039 cut-off events. For 408440/408445 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 47260 event pairs, 851 based on Foata normal form. 6/7043 useless extension candidates. Maximal degree in co-relation 46565. Up to 6086 conditions per place. [2024-06-28 03:52:13,609 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 181 changer transitions 0/531 dead transitions. [2024-06-28 03:52:13,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 531 transitions, 7830 flow [2024-06-28 03:52:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:52:13,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:52:13,611 INFO L175 Difference]: Start difference. First operand has 345 places, 508 transitions, 6534 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:52:13,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 531 transitions, 7830 flow [2024-06-28 03:52:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 531 transitions, 7571 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 03:52:15,072 INFO L231 Difference]: Finished difference. Result has 344 places, 508 transitions, 6650 flow [2024-06-28 03:52:15,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=344, PETRI_TRANSITIONS=508} [2024-06-28 03:52:15,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-28 03:52:15,072 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 508 transitions, 6650 flow [2024-06-28 03:52:15,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:15,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:15,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:15,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:52:15,073 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:15,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 933700852, now seen corresponding path program 6 times [2024-06-28 03:52:15,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:15,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341620657] [2024-06-28 03:52:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:15,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341620657] [2024-06-28 03:52:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341620657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:18,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:18,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:18,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065480101] [2024-06-28 03:52:18,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:18,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:18,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:18,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:18,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 508 transitions, 6650 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:18,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:18,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:18,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:19,902 INFO L124 PetriNetUnfolderBase]: 4233/7034 cut-off events. [2024-06-28 03:52:19,902 INFO L125 PetriNetUnfolderBase]: For 403619/403625 co-relation queries the response was YES. [2024-06-28 03:52:19,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46819 conditions, 7034 events. 4233/7034 cut-off events. For 403619/403625 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 47355 event pairs, 1203 based on Foata normal form. 8/7037 useless extension candidates. Maximal degree in co-relation 46674. Up to 6116 conditions per place. [2024-06-28 03:52:20,005 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 152 changer transitions 0/531 dead transitions. [2024-06-28 03:52:20,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 531 transitions, 7946 flow [2024-06-28 03:52:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:52:20,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:52:20,007 INFO L175 Difference]: Start difference. First operand has 344 places, 508 transitions, 6650 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:52:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 531 transitions, 7946 flow [2024-06-28 03:52:21,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 531 transitions, 7509 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 03:52:21,218 INFO L231 Difference]: Finished difference. Result has 343 places, 508 transitions, 6533 flow [2024-06-28 03:52:21,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6215, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6533, PETRI_PLACES=343, PETRI_TRANSITIONS=508} [2024-06-28 03:52:21,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-28 03:52:21,218 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 508 transitions, 6533 flow [2024-06-28 03:52:21,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:21,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:21,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:52:21,219 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -494214744, now seen corresponding path program 7 times [2024-06-28 03:52:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:21,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403959866] [2024-06-28 03:52:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:24,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403959866] [2024-06-28 03:52:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403959866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:24,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:24,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:24,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238193806] [2024-06-28 03:52:24,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:24,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:24,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:24,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:24,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 508 transitions, 6533 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:24,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:24,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:24,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:26,208 INFO L124 PetriNetUnfolderBase]: 4305/7145 cut-off events. [2024-06-28 03:52:26,208 INFO L125 PetriNetUnfolderBase]: For 436225/436235 co-relation queries the response was YES. [2024-06-28 03:52:26,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47686 conditions, 7145 events. 4305/7145 cut-off events. For 436225/436235 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 48102 event pairs, 1203 based on Foata normal form. 16/7157 useless extension candidates. Maximal degree in co-relation 47541. Up to 6356 conditions per place. [2024-06-28 03:52:26,303 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 109 changer transitions 0/554 dead transitions. [2024-06-28 03:52:26,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 554 transitions, 8283 flow [2024-06-28 03:52:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 03:52:26,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:52:26,305 INFO L175 Difference]: Start difference. First operand has 343 places, 508 transitions, 6533 flow. Second operand 10 states and 170 transitions. [2024-06-28 03:52:26,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 554 transitions, 8283 flow [2024-06-28 03:52:27,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 554 transitions, 7931 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 03:52:27,544 INFO L231 Difference]: Finished difference. Result has 345 places, 522 transitions, 6621 flow [2024-06-28 03:52:27,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6213, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6621, PETRI_PLACES=345, PETRI_TRANSITIONS=522} [2024-06-28 03:52:27,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 03:52:27,545 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 522 transitions, 6621 flow [2024-06-28 03:52:27,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:27,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:27,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:27,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:52:27,546 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:27,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:27,546 INFO L85 PathProgramCache]: Analyzing trace with hash -848582184, now seen corresponding path program 16 times [2024-06-28 03:52:27,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:27,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492543551] [2024-06-28 03:52:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:30,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:30,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492543551] [2024-06-28 03:52:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492543551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215754350] [2024-06-28 03:52:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:30,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:30,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 522 transitions, 6621 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:30,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:30,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:30,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:32,286 INFO L124 PetriNetUnfolderBase]: 4325/7160 cut-off events. [2024-06-28 03:52:32,286 INFO L125 PetriNetUnfolderBase]: For 421678/421682 co-relation queries the response was YES. [2024-06-28 03:52:32,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47713 conditions, 7160 events. 4325/7160 cut-off events. For 421678/421682 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 47889 event pairs, 898 based on Foata normal form. 4/7156 useless extension candidates. Maximal degree in co-relation 47568. Up to 6464 conditions per place. [2024-06-28 03:52:32,381 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 93 changer transitions 0/558 dead transitions. [2024-06-28 03:52:32,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 558 transitions, 8124 flow [2024-06-28 03:52:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 03:52:32,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-28 03:52:32,383 INFO L175 Difference]: Start difference. First operand has 345 places, 522 transitions, 6621 flow. Second operand 10 states and 163 transitions. [2024-06-28 03:52:32,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 558 transitions, 8124 flow [2024-06-28 03:52:33,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 558 transitions, 7880 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:52:33,524 INFO L231 Difference]: Finished difference. Result has 349 places, 528 transitions, 6691 flow [2024-06-28 03:52:33,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6691, PETRI_PLACES=349, PETRI_TRANSITIONS=528} [2024-06-28 03:52:33,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-28 03:52:33,525 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 528 transitions, 6691 flow [2024-06-28 03:52:33,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:33,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:33,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:33,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:52:33,526 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:33,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1608301828, now seen corresponding path program 8 times [2024-06-28 03:52:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390358094] [2024-06-28 03:52:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:36,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390358094] [2024-06-28 03:52:36,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390358094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:36,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:36,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:36,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493396945] [2024-06-28 03:52:36,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:36,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:36,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:36,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:36,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:36,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 528 transitions, 6691 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:36,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:36,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:36,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:38,297 INFO L124 PetriNetUnfolderBase]: 4313/7160 cut-off events. [2024-06-28 03:52:38,298 INFO L125 PetriNetUnfolderBase]: For 418439/418449 co-relation queries the response was YES. [2024-06-28 03:52:38,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47226 conditions, 7160 events. 4313/7160 cut-off events. For 418439/418449 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 48212 event pairs, 1204 based on Foata normal form. 12/7168 useless extension candidates. Maximal degree in co-relation 47080. Up to 6374 conditions per place. [2024-06-28 03:52:38,392 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 107 changer transitions 0/552 dead transitions. [2024-06-28 03:52:38,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 552 transitions, 8048 flow [2024-06-28 03:52:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:52:38,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 03:52:38,393 INFO L175 Difference]: Start difference. First operand has 349 places, 528 transitions, 6691 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:52:38,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 552 transitions, 8048 flow [2024-06-28 03:52:39,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 552 transitions, 7600 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-28 03:52:39,545 INFO L231 Difference]: Finished difference. Result has 348 places, 528 transitions, 6467 flow [2024-06-28 03:52:39,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6467, PETRI_PLACES=348, PETRI_TRANSITIONS=528} [2024-06-28 03:52:39,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-28 03:52:39,546 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 528 transitions, 6467 flow [2024-06-28 03:52:39,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:39,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:39,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:39,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:52:39,547 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:39,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash 892686360, now seen corresponding path program 17 times [2024-06-28 03:52:39,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:39,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578506037] [2024-06-28 03:52:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:39,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:42,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:42,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578506037] [2024-06-28 03:52:42,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578506037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:42,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:42,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:42,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035772508] [2024-06-28 03:52:42,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:42,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:42,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:42,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 528 transitions, 6467 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:42,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:42,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:42,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:44,121 INFO L124 PetriNetUnfolderBase]: 4301/7128 cut-off events. [2024-06-28 03:52:44,121 INFO L125 PetriNetUnfolderBase]: For 406832/406836 co-relation queries the response was YES. [2024-06-28 03:52:44,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46029 conditions, 7128 events. 4301/7128 cut-off events. For 406832/406836 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 47762 event pairs, 896 based on Foata normal form. 4/7124 useless extension candidates. Maximal degree in co-relation 45883. Up to 6438 conditions per place. [2024-06-28 03:52:44,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 91 changer transitions 0/551 dead transitions. [2024-06-28 03:52:44,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 551 transitions, 7660 flow [2024-06-28 03:52:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:52:44,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:52:44,237 INFO L175 Difference]: Start difference. First operand has 348 places, 528 transitions, 6467 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:52:44,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 551 transitions, 7660 flow [2024-06-28 03:52:45,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 551 transitions, 7382 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 03:52:45,466 INFO L231 Difference]: Finished difference. Result has 349 places, 528 transitions, 6381 flow [2024-06-28 03:52:45,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6381, PETRI_PLACES=349, PETRI_TRANSITIONS=528} [2024-06-28 03:52:45,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-28 03:52:45,467 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 528 transitions, 6381 flow [2024-06-28 03:52:45,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:45,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:45,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:45,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:52:45,467 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2022958332, now seen corresponding path program 9 times [2024-06-28 03:52:45,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:45,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191243866] [2024-06-28 03:52:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:45,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:47,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191243866] [2024-06-28 03:52:47,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191243866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:47,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:47,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:47,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892462948] [2024-06-28 03:52:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:47,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:47,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:48,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:48,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 528 transitions, 6381 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:48,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:48,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:48,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:50,175 INFO L124 PetriNetUnfolderBase]: 4277/7117 cut-off events. [2024-06-28 03:52:50,175 INFO L125 PetriNetUnfolderBase]: For 401937/401947 co-relation queries the response was YES. [2024-06-28 03:52:50,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45127 conditions, 7117 events. 4277/7117 cut-off events. For 401937/401947 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 48044 event pairs, 1209 based on Foata normal form. 16/7129 useless extension candidates. Maximal degree in co-relation 44980. Up to 6390 conditions per place. [2024-06-28 03:52:50,254 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 93 changer transitions 0/553 dead transitions. [2024-06-28 03:52:50,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 553 transitions, 7586 flow [2024-06-28 03:52:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:52:50,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 03:52:50,256 INFO L175 Difference]: Start difference. First operand has 349 places, 528 transitions, 6381 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:52:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 553 transitions, 7586 flow [2024-06-28 03:52:51,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 553 transitions, 7364 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 03:52:51,470 INFO L231 Difference]: Finished difference. Result has 350 places, 528 transitions, 6361 flow [2024-06-28 03:52:51,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6361, PETRI_PLACES=350, PETRI_TRANSITIONS=528} [2024-06-28 03:52:51,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 03:52:51,473 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 528 transitions, 6361 flow [2024-06-28 03:52:51,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:51,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:51,473 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] [2024-06-28 03:52:51,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:52:51,473 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:51,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1312847524, now seen corresponding path program 10 times [2024-06-28 03:52:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:51,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349954529] [2024-06-28 03:52:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:51,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:53,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349954529] [2024-06-28 03:52:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349954529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:53,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:53,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:53,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075056400] [2024-06-28 03:52:53,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:53,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:53,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 528 transitions, 6361 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:53,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:53,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:55,842 INFO L124 PetriNetUnfolderBase]: 4287/7130 cut-off events. [2024-06-28 03:52:55,842 INFO L125 PetriNetUnfolderBase]: For 388976/388986 co-relation queries the response was YES. [2024-06-28 03:52:55,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45273 conditions, 7130 events. 4287/7130 cut-off events. For 388976/388986 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 48112 event pairs, 1137 based on Foata normal form. 10/7136 useless extension candidates. Maximal degree in co-relation 45125. Up to 6222 conditions per place. [2024-06-28 03:52:55,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 162 changer transitions 0/577 dead transitions. [2024-06-28 03:52:55,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 577 transitions, 8026 flow [2024-06-28 03:52:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:52:55,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:52:55,952 INFO L175 Difference]: Start difference. First operand has 350 places, 528 transitions, 6361 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:52:55,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 577 transitions, 8026 flow [2024-06-28 03:52:57,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 577 transitions, 7808 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:52:57,233 INFO L231 Difference]: Finished difference. Result has 352 places, 550 transitions, 6787 flow [2024-06-28 03:52:57,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6787, PETRI_PLACES=352, PETRI_TRANSITIONS=550} [2024-06-28 03:52:57,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-28 03:52:57,234 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 550 transitions, 6787 flow [2024-06-28 03:52:57,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:57,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:57,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:57,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:52:57,234 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:57,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash -464231598, now seen corresponding path program 11 times [2024-06-28 03:52:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:57,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656972017] [2024-06-28 03:52:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:59,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:59,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656972017] [2024-06-28 03:52:59,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656972017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:59,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:59,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626218312] [2024-06-28 03:52:59,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:59,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:59,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:59,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 550 transitions, 6787 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:59,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:59,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:59,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:02,252 INFO L124 PetriNetUnfolderBase]: 4313/7176 cut-off events. [2024-06-28 03:53:02,253 INFO L125 PetriNetUnfolderBase]: For 406857/406867 co-relation queries the response was YES. [2024-06-28 03:53:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46519 conditions, 7176 events. 4313/7176 cut-off events. For 406857/406867 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 48419 event pairs, 1130 based on Foata normal form. 10/7182 useless extension candidates. Maximal degree in co-relation 46369. Up to 6247 conditions per place. [2024-06-28 03:53:02,338 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 162 changer transitions 0/580 dead transitions. [2024-06-28 03:53:02,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 580 transitions, 8486 flow [2024-06-28 03:53:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:53:02,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 03:53:02,340 INFO L175 Difference]: Start difference. First operand has 352 places, 550 transitions, 6787 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:53:02,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 580 transitions, 8486 flow [2024-06-28 03:53:03,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 580 transitions, 8329 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:03,691 INFO L231 Difference]: Finished difference. Result has 357 places, 556 transitions, 7076 flow [2024-06-28 03:53:03,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6646, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7076, PETRI_PLACES=357, PETRI_TRANSITIONS=556} [2024-06-28 03:53:03,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-28 03:53:03,692 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 556 transitions, 7076 flow [2024-06-28 03:53:03,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:03,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:03,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:03,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:53:03,693 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:03,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1456500718, now seen corresponding path program 18 times [2024-06-28 03:53:03,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031330837] [2024-06-28 03:53:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:06,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031330837] [2024-06-28 03:53:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031330837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:06,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:06,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:06,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488395201] [2024-06-28 03:53:06,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:06,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:06,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 556 transitions, 7076 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:06,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:06,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:06,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:08,814 INFO L124 PetriNetUnfolderBase]: 4323/7160 cut-off events. [2024-06-28 03:53:08,814 INFO L125 PetriNetUnfolderBase]: For 413830/413834 co-relation queries the response was YES. [2024-06-28 03:53:08,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47157 conditions, 7160 events. 4323/7160 cut-off events. For 413830/413834 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47926 event pairs, 843 based on Foata normal form. 2/7154 useless extension candidates. Maximal degree in co-relation 47005. Up to 6117 conditions per place. [2024-06-28 03:53:08,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 373 selfloop transitions, 206 changer transitions 0/584 dead transitions. [2024-06-28 03:53:08,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 584 transitions, 8622 flow [2024-06-28 03:53:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:53:08,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:53:08,909 INFO L175 Difference]: Start difference. First operand has 357 places, 556 transitions, 7076 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:53:08,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 584 transitions, 8622 flow [2024-06-28 03:53:10,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 584 transitions, 8352 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:10,763 INFO L231 Difference]: Finished difference. Result has 361 places, 562 transitions, 7366 flow [2024-06-28 03:53:10,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7366, PETRI_PLACES=361, PETRI_TRANSITIONS=562} [2024-06-28 03:53:10,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-28 03:53:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 562 transitions, 7366 flow [2024-06-28 03:53:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:10,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:10,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:10,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:53:10,764 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:10,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1456500904, now seen corresponding path program 12 times [2024-06-28 03:53:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:10,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679051503] [2024-06-28 03:53:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:13,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:13,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679051503] [2024-06-28 03:53:13,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679051503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:13,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:13,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:13,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008308430] [2024-06-28 03:53:13,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:13,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:13,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:13,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:13,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:13,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 562 transitions, 7366 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:13,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:13,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:15,661 INFO L124 PetriNetUnfolderBase]: 4317/7186 cut-off events. [2024-06-28 03:53:15,662 INFO L125 PetriNetUnfolderBase]: For 420354/420364 co-relation queries the response was YES. [2024-06-28 03:53:15,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47572 conditions, 7186 events. 4317/7186 cut-off events. For 420354/420364 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 48566 event pairs, 1138 based on Foata normal form. 10/7192 useless extension candidates. Maximal degree in co-relation 47419. Up to 6256 conditions per place. [2024-06-28 03:53:15,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 157 changer transitions 0/585 dead transitions. [2024-06-28 03:53:15,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 585 transitions, 8789 flow [2024-06-28 03:53:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:53:15,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:53:15,756 INFO L175 Difference]: Start difference. First operand has 361 places, 562 transitions, 7366 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:53:15,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 585 transitions, 8789 flow [2024-06-28 03:53:17,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 585 transitions, 8572 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:17,170 INFO L231 Difference]: Finished difference. Result has 365 places, 562 transitions, 7469 flow [2024-06-28 03:53:17,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7469, PETRI_PLACES=365, PETRI_TRANSITIONS=562} [2024-06-28 03:53:17,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 03:53:17,171 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 562 transitions, 7469 flow [2024-06-28 03:53:17,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:17,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:17,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:17,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:53:17,172 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:17,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:17,172 INFO L85 PathProgramCache]: Analyzing trace with hash -615328744, now seen corresponding path program 19 times [2024-06-28 03:53:17,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:17,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218135268] [2024-06-28 03:53:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:17,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218135268] [2024-06-28 03:53:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218135268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:19,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:19,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:19,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193869276] [2024-06-28 03:53:19,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:19,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:19,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:19,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:19,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 562 transitions, 7469 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:19,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:19,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:19,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:22,395 INFO L124 PetriNetUnfolderBase]: 4343/7199 cut-off events. [2024-06-28 03:53:22,395 INFO L125 PetriNetUnfolderBase]: For 432228/432259 co-relation queries the response was YES. [2024-06-28 03:53:22,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48213 conditions, 7199 events. 4343/7199 cut-off events. For 432228/432259 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 48254 event pairs, 874 based on Foata normal form. 13/7191 useless extension candidates. Maximal degree in co-relation 48058. Up to 6134 conditions per place. [2024-06-28 03:53:22,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 204 changer transitions 0/586 dead transitions. [2024-06-28 03:53:22,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 586 transitions, 9189 flow [2024-06-28 03:53:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:53:22,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:53:22,487 INFO L175 Difference]: Start difference. First operand has 365 places, 562 transitions, 7469 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:53:22,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 586 transitions, 9189 flow [2024-06-28 03:53:24,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 586 transitions, 8835 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 03:53:24,136 INFO L231 Difference]: Finished difference. Result has 366 places, 568 transitions, 7677 flow [2024-06-28 03:53:24,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7115, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7677, PETRI_PLACES=366, PETRI_TRANSITIONS=568} [2024-06-28 03:53:24,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-28 03:53:24,137 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 568 transitions, 7677 flow [2024-06-28 03:53:24,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:24,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:24,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:53:24,137 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:24,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash -569038360, now seen corresponding path program 20 times [2024-06-28 03:53:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:24,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180218468] [2024-06-28 03:53:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180218468] [2024-06-28 03:53:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180218468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:27,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:27,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:27,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964386803] [2024-06-28 03:53:27,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:27,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:27,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:27,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 568 transitions, 7677 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:27,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:27,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:27,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:29,707 INFO L124 PetriNetUnfolderBase]: 4337/7188 cut-off events. [2024-06-28 03:53:29,707 INFO L125 PetriNetUnfolderBase]: For 432562/432566 co-relation queries the response was YES. [2024-06-28 03:53:29,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48147 conditions, 7188 events. 4337/7188 cut-off events. For 432562/432566 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 48189 event pairs, 861 based on Foata normal form. 2/7182 useless extension candidates. Maximal degree in co-relation 47991. Up to 6595 conditions per place. [2024-06-28 03:53:29,793 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 58 changer transitions 0/584 dead transitions. [2024-06-28 03:53:29,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 584 transitions, 8885 flow [2024-06-28 03:53:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:53:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 03:53:29,795 INFO L175 Difference]: Start difference. First operand has 366 places, 568 transitions, 7677 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:53:29,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 584 transitions, 8885 flow [2024-06-28 03:53:31,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 584 transitions, 8219 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:31,424 INFO L231 Difference]: Finished difference. Result has 369 places, 568 transitions, 7133 flow [2024-06-28 03:53:31,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7011, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7133, PETRI_PLACES=369, PETRI_TRANSITIONS=568} [2024-06-28 03:53:31,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-28 03:53:31,424 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 568 transitions, 7133 flow [2024-06-28 03:53:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:31,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:31,425 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] [2024-06-28 03:53:31,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:53:31,425 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:31,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash 383859956, now seen corresponding path program 13 times [2024-06-28 03:53:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:31,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149109036] [2024-06-28 03:53:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:31,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:34,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:34,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149109036] [2024-06-28 03:53:34,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149109036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:34,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:34,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:34,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905952529] [2024-06-28 03:53:34,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:34,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:34,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:34,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 568 transitions, 7133 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:36,582 INFO L124 PetriNetUnfolderBase]: 4347/7242 cut-off events. [2024-06-28 03:53:36,582 INFO L125 PetriNetUnfolderBase]: For 441517/441554 co-relation queries the response was YES. [2024-06-28 03:53:36,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47135 conditions, 7242 events. 4347/7242 cut-off events. For 441517/441554 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 49041 event pairs, 1184 based on Foata normal form. 21/7248 useless extension candidates. Maximal degree in co-relation 46979. Up to 6294 conditions per place. [2024-06-28 03:53:36,681 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 159 changer transitions 0/589 dead transitions. [2024-06-28 03:53:36,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 589 transitions, 8597 flow [2024-06-28 03:53:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:53:36,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:53:36,683 INFO L175 Difference]: Start difference. First operand has 369 places, 568 transitions, 7133 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:53:36,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 589 transitions, 8597 flow [2024-06-28 03:53:38,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 589 transitions, 8363 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 03:53:38,539 INFO L231 Difference]: Finished difference. Result has 367 places, 571 transitions, 7276 flow [2024-06-28 03:53:38,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7276, PETRI_PLACES=367, PETRI_TRANSITIONS=571} [2024-06-28 03:53:38,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-28 03:53:38,540 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 571 transitions, 7276 flow [2024-06-28 03:53:38,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:38,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:38,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:38,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:53:38,541 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:38,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:38,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1786009948, now seen corresponding path program 14 times [2024-06-28 03:53:38,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:38,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024619546] [2024-06-28 03:53:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:38,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:41,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024619546] [2024-06-28 03:53:41,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024619546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:41,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:41,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11287392] [2024-06-28 03:53:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:41,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:41,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:41,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 571 transitions, 7276 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:41,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:41,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:41,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:43,637 INFO L124 PetriNetUnfolderBase]: 4357/7256 cut-off events. [2024-06-28 03:53:43,637 INFO L125 PetriNetUnfolderBase]: For 450042/450079 co-relation queries the response was YES. [2024-06-28 03:53:43,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47553 conditions, 7256 events. 4357/7256 cut-off events. For 450042/450079 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 49102 event pairs, 1178 based on Foata normal form. 21/7262 useless extension candidates. Maximal degree in co-relation 47398. Up to 6304 conditions per place. [2024-06-28 03:53:43,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 166 changer transitions 0/592 dead transitions. [2024-06-28 03:53:43,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 592 transitions, 8754 flow [2024-06-28 03:53:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:53:43,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:53:43,735 INFO L175 Difference]: Start difference. First operand has 367 places, 571 transitions, 7276 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:53:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 592 transitions, 8754 flow [2024-06-28 03:53:45,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 592 transitions, 8376 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:45,556 INFO L231 Difference]: Finished difference. Result has 370 places, 574 transitions, 7295 flow [2024-06-28 03:53:45,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6925, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7295, PETRI_PLACES=370, PETRI_TRANSITIONS=574} [2024-06-28 03:53:45,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-28 03:53:45,557 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 574 transitions, 7295 flow [2024-06-28 03:53:45,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:45,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:45,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:53:45,557 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:45,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 560991290, now seen corresponding path program 21 times [2024-06-28 03:53:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:45,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680455973] [2024-06-28 03:53:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:45,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:48,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680455973] [2024-06-28 03:53:48,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680455973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:48,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:48,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819880421] [2024-06-28 03:53:48,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:48,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:48,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:48,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 574 transitions, 7295 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:48,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:48,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:48,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:50,498 INFO L124 PetriNetUnfolderBase]: 4351/7213 cut-off events. [2024-06-28 03:53:50,499 INFO L125 PetriNetUnfolderBase]: For 446229/446260 co-relation queries the response was YES. [2024-06-28 03:53:50,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47257 conditions, 7213 events. 4351/7213 cut-off events. For 446229/446260 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48335 event pairs, 858 based on Foata normal form. 13/7205 useless extension candidates. Maximal degree in co-relation 47101. Up to 6152 conditions per place. [2024-06-28 03:53:50,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 373 selfloop transitions, 212 changer transitions 0/590 dead transitions. [2024-06-28 03:53:50,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 590 transitions, 8515 flow [2024-06-28 03:53:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:53:50,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:53:50,597 INFO L175 Difference]: Start difference. First operand has 370 places, 574 transitions, 7295 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:53:50,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 590 transitions, 8515 flow [2024-06-28 03:53:52,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 590 transitions, 8003 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 03:53:52,439 INFO L231 Difference]: Finished difference. Result has 371 places, 574 transitions, 7213 flow [2024-06-28 03:53:52,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6783, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7213, PETRI_PLACES=371, PETRI_TRANSITIONS=574} [2024-06-28 03:53:52,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 03:53:52,439 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 574 transitions, 7213 flow [2024-06-28 03:53:52,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:52,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:52,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:53:52,440 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:52,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1973386882, now seen corresponding path program 15 times [2024-06-28 03:53:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:52,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554028894] [2024-06-28 03:53:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554028894] [2024-06-28 03:53:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554028894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:55,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:55,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121121577] [2024-06-28 03:53:55,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:55,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:55,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:53:55,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 574 transitions, 7213 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:55,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:55,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:53:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:57,938 INFO L124 PetriNetUnfolderBase]: 4345/7240 cut-off events. [2024-06-28 03:53:57,938 INFO L125 PetriNetUnfolderBase]: For 448060/448097 co-relation queries the response was YES. [2024-06-28 03:53:58,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47131 conditions, 7240 events. 4345/7240 cut-off events. For 448060/448097 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 49076 event pairs, 1178 based on Foata normal form. 21/7246 useless extension candidates. Maximal degree in co-relation 46974. Up to 6291 conditions per place. [2024-06-28 03:53:58,043 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 162 changer transitions 0/591 dead transitions. [2024-06-28 03:53:58,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 591 transitions, 8444 flow [2024-06-28 03:53:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:53:58,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:53:58,045 INFO L175 Difference]: Start difference. First operand has 371 places, 574 transitions, 7213 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:53:58,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 591 transitions, 8444 flow [2024-06-28 03:54:00,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 591 transitions, 7871 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 03:54:00,012 INFO L231 Difference]: Finished difference. Result has 371 places, 574 transitions, 6970 flow [2024-06-28 03:54:00,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6640, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6970, PETRI_PLACES=371, PETRI_TRANSITIONS=574} [2024-06-28 03:54:00,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 03:54:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 574 transitions, 6970 flow [2024-06-28 03:54:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:00,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:54:00,014 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:00,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2056361346, now seen corresponding path program 1 times [2024-06-28 03:54:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:00,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878720338] [2024-06-28 03:54:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:03,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:03,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878720338] [2024-06-28 03:54:03,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878720338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:03,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:03,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206427494] [2024-06-28 03:54:03,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:03,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:03,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:03,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 574 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:03,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:03,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:05,557 INFO L124 PetriNetUnfolderBase]: 4353/7227 cut-off events. [2024-06-28 03:54:05,557 INFO L125 PetriNetUnfolderBase]: For 454363/454363 co-relation queries the response was YES. [2024-06-28 03:54:05,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47017 conditions, 7227 events. 4353/7227 cut-off events. For 454363/454363 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 48748 event pairs, 1603 based on Foata normal form. 2/7228 useless extension candidates. Maximal degree in co-relation 46859. Up to 6718 conditions per place. [2024-06-28 03:54:05,659 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 566 selfloop transitions, 30 changer transitions 0/601 dead transitions. [2024-06-28 03:54:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 601 transitions, 8306 flow [2024-06-28 03:54:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:54:05,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:54:05,660 INFO L175 Difference]: Start difference. First operand has 371 places, 574 transitions, 6970 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:54:05,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 601 transitions, 8306 flow [2024-06-28 03:54:07,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 601 transitions, 7934 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 03:54:07,801 INFO L231 Difference]: Finished difference. Result has 371 places, 576 transitions, 6711 flow [2024-06-28 03:54:07,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6711, PETRI_PLACES=371, PETRI_TRANSITIONS=576} [2024-06-28 03:54:07,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 03:54:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 576 transitions, 6711 flow [2024-06-28 03:54:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:07,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:54:07,802 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:07,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1456954744, now seen corresponding path program 2 times [2024-06-28 03:54:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:07,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357782859] [2024-06-28 03:54:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:07,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:10,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:10,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357782859] [2024-06-28 03:54:10,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357782859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:10,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:10,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:10,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486258994] [2024-06-28 03:54:10,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:10,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:10,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:10,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:10,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:10,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:10,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 576 transitions, 6711 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:10,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:10,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:10,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:13,034 INFO L124 PetriNetUnfolderBase]: 4361/7239 cut-off events. [2024-06-28 03:54:13,034 INFO L125 PetriNetUnfolderBase]: For 463145/463145 co-relation queries the response was YES. [2024-06-28 03:54:13,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46934 conditions, 7239 events. 4361/7239 cut-off events. For 463145/463145 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 48891 event pairs, 1605 based on Foata normal form. 2/7240 useless extension candidates. Maximal degree in co-relation 46775. Up to 6730 conditions per place. [2024-06-28 03:54:13,140 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 565 selfloop transitions, 29 changer transitions 0/599 dead transitions. [2024-06-28 03:54:13,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 599 transitions, 8023 flow [2024-06-28 03:54:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:54:13,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:54:13,142 INFO L175 Difference]: Start difference. First operand has 371 places, 576 transitions, 6711 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:54:13,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 599 transitions, 8023 flow [2024-06-28 03:54:15,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 599 transitions, 7926 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:15,220 INFO L231 Difference]: Finished difference. Result has 373 places, 578 transitions, 6729 flow [2024-06-28 03:54:15,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6614, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6729, PETRI_PLACES=373, PETRI_TRANSITIONS=578} [2024-06-28 03:54:15,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-28 03:54:15,221 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 578 transitions, 6729 flow [2024-06-28 03:54:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:15,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:15,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:54:15,221 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:15,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1460222752, now seen corresponding path program 3 times [2024-06-28 03:54:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:15,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74136745] [2024-06-28 03:54:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:18,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74136745] [2024-06-28 03:54:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74136745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:18,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:18,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544351031] [2024-06-28 03:54:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:18,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:18,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 578 transitions, 6729 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:18,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:18,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:18,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:20,328 INFO L124 PetriNetUnfolderBase]: 4369/7251 cut-off events. [2024-06-28 03:54:20,328 INFO L125 PetriNetUnfolderBase]: For 473371/473371 co-relation queries the response was YES. [2024-06-28 03:54:20,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47267 conditions, 7251 events. 4369/7251 cut-off events. For 473371/473371 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 48999 event pairs, 1605 based on Foata normal form. 2/7252 useless extension candidates. Maximal degree in co-relation 47107. Up to 6722 conditions per place. [2024-06-28 03:54:20,428 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 562 selfloop transitions, 34 changer transitions 0/601 dead transitions. [2024-06-28 03:54:20,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 601 transitions, 8049 flow [2024-06-28 03:54:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:54:20,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:54:20,429 INFO L175 Difference]: Start difference. First operand has 373 places, 578 transitions, 6729 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:54:20,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 601 transitions, 8049 flow [2024-06-28 03:54:22,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 601 transitions, 7950 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:22,807 INFO L231 Difference]: Finished difference. Result has 375 places, 580 transitions, 6759 flow [2024-06-28 03:54:22,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6759, PETRI_PLACES=375, PETRI_TRANSITIONS=580} [2024-06-28 03:54:22,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-28 03:54:22,808 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 580 transitions, 6759 flow [2024-06-28 03:54:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:22,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:22,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:54:22,809 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:22,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:22,809 INFO L85 PathProgramCache]: Analyzing trace with hash -181242688, now seen corresponding path program 4 times [2024-06-28 03:54:22,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:22,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717905585] [2024-06-28 03:54:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:22,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717905585] [2024-06-28 03:54:25,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717905585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:25,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:25,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389609914] [2024-06-28 03:54:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:25,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:25,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 580 transitions, 6759 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:25,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:25,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:25,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:28,243 INFO L124 PetriNetUnfolderBase]: 4377/7269 cut-off events. [2024-06-28 03:54:28,243 INFO L125 PetriNetUnfolderBase]: For 483956/483959 co-relation queries the response was YES. [2024-06-28 03:54:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47634 conditions, 7269 events. 4377/7269 cut-off events. For 483956/483959 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49172 event pairs, 1613 based on Foata normal form. 4/7270 useless extension candidates. Maximal degree in co-relation 47473. Up to 6754 conditions per place. [2024-06-28 03:54:28,335 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 564 selfloop transitions, 29 changer transitions 0/598 dead transitions. [2024-06-28 03:54:28,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 598 transitions, 8051 flow [2024-06-28 03:54:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:54:28,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:54:28,337 INFO L175 Difference]: Start difference. First operand has 375 places, 580 transitions, 6759 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:54:28,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 598 transitions, 8051 flow [2024-06-28 03:54:30,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 598 transitions, 7938 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:30,669 INFO L231 Difference]: Finished difference. Result has 377 places, 582 transitions, 6769 flow [2024-06-28 03:54:30,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6646, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6769, PETRI_PLACES=377, PETRI_TRANSITIONS=582} [2024-06-28 03:54:30,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-28 03:54:30,670 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 582 transitions, 6769 flow [2024-06-28 03:54:30,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:30,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:30,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:30,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:54:30,671 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:30,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash 568602596, now seen corresponding path program 5 times [2024-06-28 03:54:30,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:30,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973901] [2024-06-28 03:54:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:33,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973901] [2024-06-28 03:54:33,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:33,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:33,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:33,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8240832] [2024-06-28 03:54:33,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:33,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:33,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:33,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:33,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:33,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:33,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 582 transitions, 6769 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:33,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:33,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:33,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:35,878 INFO L124 PetriNetUnfolderBase]: 4385/7281 cut-off events. [2024-06-28 03:54:35,878 INFO L125 PetriNetUnfolderBase]: For 494578/494581 co-relation queries the response was YES. [2024-06-28 03:54:35,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47953 conditions, 7281 events. 4385/7281 cut-off events. For 494578/494581 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49240 event pairs, 1613 based on Foata normal form. 4/7282 useless extension candidates. Maximal degree in co-relation 47791. Up to 6752 conditions per place. [2024-06-28 03:54:35,983 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 563 selfloop transitions, 32 changer transitions 0/600 dead transitions. [2024-06-28 03:54:35,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 600 transitions, 8069 flow [2024-06-28 03:54:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:54:35,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 03:54:35,988 INFO L175 Difference]: Start difference. First operand has 377 places, 582 transitions, 6769 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:54:35,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 600 transitions, 8069 flow [2024-06-28 03:54:38,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 600 transitions, 7962 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:38,403 INFO L231 Difference]: Finished difference. Result has 379 places, 584 transitions, 6795 flow [2024-06-28 03:54:38,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6662, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6795, PETRI_PLACES=379, PETRI_TRANSITIONS=584} [2024-06-28 03:54:38,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 03:54:38,403 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 584 transitions, 6795 flow [2024-06-28 03:54:38,403 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) [2024-06-28 03:54:38,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:38,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:38,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:54:38,404 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:38,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1778376508, now seen corresponding path program 6 times [2024-06-28 03:54:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:38,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466008176] [2024-06-28 03:54:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:38,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:41,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466008176] [2024-06-28 03:54:41,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466008176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:41,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:41,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:41,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084526078] [2024-06-28 03:54:41,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:41,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:41,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 584 transitions, 6795 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:41,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:41,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:41,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:43,495 INFO L124 PetriNetUnfolderBase]: 4380/7272 cut-off events. [2024-06-28 03:54:43,495 INFO L125 PetriNetUnfolderBase]: For 494958/494961 co-relation queries the response was YES. [2024-06-28 03:54:43,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47886 conditions, 7272 events. 4380/7272 cut-off events. For 494958/494961 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49206 event pairs, 1606 based on Foata normal form. 4/7273 useless extension candidates. Maximal degree in co-relation 47723. Up to 6697 conditions per place. [2024-06-28 03:54:43,597 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 554 selfloop transitions, 43 changer transitions 0/602 dead transitions. [2024-06-28 03:54:43,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 602 transitions, 8103 flow [2024-06-28 03:54:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:54:43,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:54:43,599 INFO L175 Difference]: Start difference. First operand has 379 places, 584 transitions, 6795 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:54:43,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 602 transitions, 8103 flow [2024-06-28 03:54:46,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 602 transitions, 7986 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:46,084 INFO L231 Difference]: Finished difference. Result has 381 places, 586 transitions, 6837 flow [2024-06-28 03:54:46,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6678, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6837, PETRI_PLACES=381, PETRI_TRANSITIONS=586} [2024-06-28 03:54:46,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-28 03:54:46,084 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 586 transitions, 6837 flow [2024-06-28 03:54:46,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:46,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:46,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:46,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:54:46,085 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:46,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash -746282429, now seen corresponding path program 1 times [2024-06-28 03:54:46,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:46,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068607194] [2024-06-28 03:54:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:46,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:48,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:48,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068607194] [2024-06-28 03:54:48,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068607194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:48,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:48,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:48,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989456300] [2024-06-28 03:54:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:48,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:48,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:48,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 586 transitions, 6837 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:48,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:48,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:48,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:51,201 INFO L124 PetriNetUnfolderBase]: 4460/7377 cut-off events. [2024-06-28 03:54:51,201 INFO L125 PetriNetUnfolderBase]: For 537955/537959 co-relation queries the response was YES. [2024-06-28 03:54:51,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 7377 events. 4460/7377 cut-off events. For 537955/537959 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 49660 event pairs, 1148 based on Foata normal form. 6/7381 useless extension candidates. Maximal degree in co-relation 49442. Up to 6533 conditions per place. [2024-06-28 03:54:51,311 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 541 selfloop transitions, 121 changer transitions 0/667 dead transitions. [2024-06-28 03:54:51,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 667 transitions, 9325 flow [2024-06-28 03:54:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:54:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:54:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 256 transitions. [2024-06-28 03:54:51,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40634920634920635 [2024-06-28 03:54:51,312 INFO L175 Difference]: Start difference. First operand has 381 places, 586 transitions, 6837 flow. Second operand 15 states and 256 transitions. [2024-06-28 03:54:51,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 667 transitions, 9325 flow [2024-06-28 03:54:53,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 667 transitions, 9182 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:53,850 INFO L231 Difference]: Finished difference. Result has 392 places, 605 transitions, 7344 flow [2024-06-28 03:54:53,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6694, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7344, PETRI_PLACES=392, PETRI_TRANSITIONS=605} [2024-06-28 03:54:53,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-28 03:54:53,851 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 605 transitions, 7344 flow [2024-06-28 03:54:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:53,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:53,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:54:53,852 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:53,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash -281824757, now seen corresponding path program 2 times [2024-06-28 03:54:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725712142] [2024-06-28 03:54:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725712142] [2024-06-28 03:54:56,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725712142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:56,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:56,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:54:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804307922] [2024-06-28 03:54:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:54:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:54:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:54:56,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:56,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 605 transitions, 7344 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:56,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:56,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:56,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:59,589 INFO L124 PetriNetUnfolderBase]: 4470/7391 cut-off events. [2024-06-28 03:54:59,589 INFO L125 PetriNetUnfolderBase]: For 555004/555008 co-relation queries the response was YES. [2024-06-28 03:54:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50873 conditions, 7391 events. 4470/7391 cut-off events. For 555004/555008 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 49811 event pairs, 1146 based on Foata normal form. 6/7395 useless extension candidates. Maximal degree in co-relation 50706. Up to 6543 conditions per place. [2024-06-28 03:54:59,694 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 540 selfloop transitions, 122 changer transitions 0/667 dead transitions. [2024-06-28 03:54:59,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 667 transitions, 9571 flow [2024-06-28 03:54:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:54:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:54:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 253 transitions. [2024-06-28 03:54:59,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015873015873016 [2024-06-28 03:54:59,695 INFO L175 Difference]: Start difference. First operand has 392 places, 605 transitions, 7344 flow. Second operand 15 states and 253 transitions. [2024-06-28 03:54:59,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 667 transitions, 9571 flow [2024-06-28 03:55:02,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 667 transitions, 9280 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:02,454 INFO L231 Difference]: Finished difference. Result has 398 places, 608 transitions, 7384 flow [2024-06-28 03:55:02,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7083, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7384, PETRI_PLACES=398, PETRI_TRANSITIONS=608} [2024-06-28 03:55:02,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-28 03:55:02,455 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 608 transitions, 7384 flow [2024-06-28 03:55:02,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:02,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:02,455 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] [2024-06-28 03:55:02,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:55:02,455 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:02,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1446249183, now seen corresponding path program 3 times [2024-06-28 03:55:02,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:02,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976349799] [2024-06-28 03:55:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:05,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976349799] [2024-06-28 03:55:05,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976349799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:05,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:05,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080308158] [2024-06-28 03:55:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:05,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:05,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:55:05,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 608 transitions, 7384 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:05,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:05,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:55:05,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:08,417 INFO L124 PetriNetUnfolderBase]: 4464/7383 cut-off events. [2024-06-28 03:55:08,418 INFO L125 PetriNetUnfolderBase]: For 551939/551943 co-relation queries the response was YES. [2024-06-28 03:55:08,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50726 conditions, 7383 events. 4464/7383 cut-off events. For 551939/551943 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 49715 event pairs, 1142 based on Foata normal form. 6/7387 useless extension candidates. Maximal degree in co-relation 50557. Up to 6538 conditions per place. [2024-06-28 03:55:08,512 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 534 selfloop transitions, 124 changer transitions 0/663 dead transitions. [2024-06-28 03:55:08,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 663 transitions, 9314 flow [2024-06-28 03:55:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:55:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:55:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 246 transitions. [2024-06-28 03:55:08,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 03:55:08,513 INFO L175 Difference]: Start difference. First operand has 398 places, 608 transitions, 7384 flow. Second operand 15 states and 246 transitions. [2024-06-28 03:55:08,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 663 transitions, 9314 flow [2024-06-28 03:55:11,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 663 transitions, 9034 flow, removed 31 selfloop flow, removed 12 redundant places. [2024-06-28 03:55:11,072 INFO L231 Difference]: Finished difference. Result has 402 places, 609 transitions, 7392 flow [2024-06-28 03:55:11,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7104, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7392, PETRI_PLACES=402, PETRI_TRANSITIONS=609} [2024-06-28 03:55:11,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-28 03:55:11,072 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 609 transitions, 7392 flow [2024-06-28 03:55:11,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:11,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:11,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:11,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:55:11,073 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:11,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1566138075, now seen corresponding path program 4 times [2024-06-28 03:55:11,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:11,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784722633] [2024-06-28 03:55:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:13,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784722633] [2024-06-28 03:55:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784722633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:13,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:13,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764453851] [2024-06-28 03:55:13,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:13,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:13,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:55:13,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 609 transitions, 7392 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:13,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:13,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:55:13,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:16,537 INFO L124 PetriNetUnfolderBase]: 4577/7538 cut-off events. [2024-06-28 03:55:16,538 INFO L125 PetriNetUnfolderBase]: For 593846/593850 co-relation queries the response was YES. [2024-06-28 03:55:16,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52358 conditions, 7538 events. 4577/7538 cut-off events. For 593846/593850 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 50598 event pairs, 918 based on Foata normal form. 8/7545 useless extension candidates. Maximal degree in co-relation 52187. Up to 6815 conditions per place. [2024-06-28 03:55:16,652 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 572 selfloop transitions, 110 changer transitions 0/687 dead transitions. [2024-06-28 03:55:16,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 687 transitions, 9564 flow [2024-06-28 03:55:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:55:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:55:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 220 transitions. [2024-06-28 03:55:16,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-28 03:55:16,654 INFO L175 Difference]: Start difference. First operand has 402 places, 609 transitions, 7392 flow. Second operand 13 states and 220 transitions. [2024-06-28 03:55:16,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 687 transitions, 9564 flow [2024-06-28 03:55:19,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 687 transitions, 9302 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-28 03:55:19,475 INFO L231 Difference]: Finished difference. Result has 405 places, 639 transitions, 7885 flow [2024-06-28 03:55:19,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7184, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7885, PETRI_PLACES=405, PETRI_TRANSITIONS=639} [2024-06-28 03:55:19,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-28 03:55:19,476 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 639 transitions, 7885 flow [2024-06-28 03:55:19,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:19,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:19,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:55:19,477 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:19,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1508900605, now seen corresponding path program 5 times [2024-06-28 03:55:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:19,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939496771] [2024-06-28 03:55:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:19,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:22,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:22,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939496771] [2024-06-28 03:55:22,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939496771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:22,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:22,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631152706] [2024-06-28 03:55:22,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:22,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:22,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:55:22,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 639 transitions, 7885 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:22,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:22,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:55:22,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:25,364 INFO L124 PetriNetUnfolderBase]: 4581/7544 cut-off events. [2024-06-28 03:55:25,364 INFO L125 PetriNetUnfolderBase]: For 592972/592976 co-relation queries the response was YES. [2024-06-28 03:55:25,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52347 conditions, 7544 events. 4581/7544 cut-off events. For 592972/592976 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 50641 event pairs, 916 based on Foata normal form. 8/7551 useless extension candidates. Maximal degree in co-relation 52174. Up to 6820 conditions per place. [2024-06-28 03:55:25,470 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 572 selfloop transitions, 110 changer transitions 0/687 dead transitions. [2024-06-28 03:55:25,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 687 transitions, 9672 flow [2024-06-28 03:55:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:55:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:55:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-06-28 03:55:25,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-28 03:55:25,472 INFO L175 Difference]: Start difference. First operand has 405 places, 639 transitions, 7885 flow. Second operand 13 states and 217 transitions. [2024-06-28 03:55:25,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 687 transitions, 9672 flow [2024-06-28 03:55:27,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 687 transitions, 9479 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:27,790 INFO L231 Difference]: Finished difference. Result has 409 places, 642 transitions, 7990 flow [2024-06-28 03:55:27,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7990, PETRI_PLACES=409, PETRI_TRANSITIONS=642} [2024-06-28 03:55:27,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-28 03:55:27,791 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 642 transitions, 7990 flow [2024-06-28 03:55:27,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:27,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:27,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:27,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:55:27,792 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:27,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1359334905, now seen corresponding path program 6 times [2024-06-28 03:55:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:27,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623777190] [2024-06-28 03:55:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:30,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623777190] [2024-06-28 03:55:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623777190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:30,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:30,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129755980] [2024-06-28 03:55:30,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:30,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:30,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:30,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:55:30,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 642 transitions, 7990 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:30,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:30,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:55:30,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:33,275 INFO L124 PetriNetUnfolderBase]: 4591/7558 cut-off events. [2024-06-28 03:55:33,275 INFO L125 PetriNetUnfolderBase]: For 591609/591613 co-relation queries the response was YES. [2024-06-28 03:55:33,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52767 conditions, 7558 events. 4591/7558 cut-off events. For 591609/591613 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50680 event pairs, 922 based on Foata normal form. 6/7563 useless extension candidates. Maximal degree in co-relation 52592. Up to 6830 conditions per place. [2024-06-28 03:55:33,402 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 577 selfloop transitions, 112 changer transitions 0/694 dead transitions. [2024-06-28 03:55:33,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 694 transitions, 9801 flow [2024-06-28 03:55:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:55:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:55:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 243 transitions. [2024-06-28 03:55:33,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-28 03:55:33,404 INFO L175 Difference]: Start difference. First operand has 409 places, 642 transitions, 7990 flow. Second operand 15 states and 243 transitions. [2024-06-28 03:55:33,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 694 transitions, 9801 flow [2024-06-28 03:55:36,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 694 transitions, 9558 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-28 03:55:36,072 INFO L231 Difference]: Finished difference. Result has 414 places, 645 transitions, 8045 flow [2024-06-28 03:55:36,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7750, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8045, PETRI_PLACES=414, PETRI_TRANSITIONS=645} [2024-06-28 03:55:36,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-28 03:55:36,073 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 645 transitions, 8045 flow [2024-06-28 03:55:36,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:36,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:36,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:55:36,074 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:36,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1280693361, now seen corresponding path program 7 times [2024-06-28 03:55:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:36,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370830216] [2024-06-28 03:55:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:36,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:39,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:39,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370830216] [2024-06-28 03:55:39,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370830216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:39,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:39,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460712629] [2024-06-28 03:55:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:39,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:39,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:39,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:55:39,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 645 transitions, 8045 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:39,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:39,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:55:39,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:42,838 INFO L124 PetriNetUnfolderBase]: 4912/8061 cut-off events. [2024-06-28 03:55:42,838 INFO L125 PetriNetUnfolderBase]: For 711314/711314 co-relation queries the response was YES. [2024-06-28 03:55:42,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57672 conditions, 8061 events. 4912/8061 cut-off events. For 711314/711314 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 54445 event pairs, 894 based on Foata normal form. 4/8060 useless extension candidates. Maximal degree in co-relation 57496. Up to 5907 conditions per place. [2024-06-28 03:55:42,973 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 372 selfloop transitions, 399 changer transitions 0/776 dead transitions. [2024-06-28 03:55:42,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 776 transitions, 11880 flow [2024-06-28 03:55:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:55:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:55:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 271 transitions. [2024-06-28 03:55:42,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301587301587302 [2024-06-28 03:55:42,975 INFO L175 Difference]: Start difference. First operand has 414 places, 645 transitions, 8045 flow. Second operand 15 states and 271 transitions. [2024-06-28 03:55:42,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 776 transitions, 11880 flow [2024-06-28 03:55:47,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 776 transitions, 11618 flow, removed 17 selfloop flow, removed 13 redundant places. [2024-06-28 03:55:47,040 INFO L231 Difference]: Finished difference. Result has 417 places, 713 transitions, 9598 flow [2024-06-28 03:55:47,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7783, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9598, PETRI_PLACES=417, PETRI_TRANSITIONS=713} [2024-06-28 03:55:47,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-28 03:55:47,040 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 713 transitions, 9598 flow [2024-06-28 03:55:47,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:47,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:47,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:47,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:55:47,041 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:47,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1116583951, now seen corresponding path program 8 times [2024-06-28 03:55:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:47,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640000915] [2024-06-28 03:55:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:49,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:49,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640000915] [2024-06-28 03:55:49,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640000915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:49,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:49,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211074107] [2024-06-28 03:55:49,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:50,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:55:50,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 713 transitions, 9598 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:50,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:50,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:55:50,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:53,664 INFO L124 PetriNetUnfolderBase]: 4954/8127 cut-off events. [2024-06-28 03:55:53,664 INFO L125 PetriNetUnfolderBase]: For 747613/747613 co-relation queries the response was YES. [2024-06-28 03:55:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61010 conditions, 8127 events. 4954/8127 cut-off events. For 747613/747613 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54978 event pairs, 894 based on Foata normal form. 2/8124 useless extension candidates. Maximal degree in co-relation 60832. Up to 5947 conditions per place. [2024-06-28 03:55:53,784 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 369 selfloop transitions, 403 changer transitions 0/777 dead transitions. [2024-06-28 03:55:53,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 777 transitions, 12670 flow [2024-06-28 03:55:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:55:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:55:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 255 transitions. [2024-06-28 03:55:53,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336734693877551 [2024-06-28 03:55:53,786 INFO L175 Difference]: Start difference. First operand has 417 places, 713 transitions, 9598 flow. Second operand 14 states and 255 transitions. [2024-06-28 03:55:53,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 777 transitions, 12670 flow [2024-06-28 03:55:58,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 777 transitions, 12199 flow, removed 182 selfloop flow, removed 5 redundant places. [2024-06-28 03:55:58,345 INFO L231 Difference]: Finished difference. Result has 426 places, 720 transitions, 10137 flow [2024-06-28 03:55:58,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9227, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10137, PETRI_PLACES=426, PETRI_TRANSITIONS=720} [2024-06-28 03:55:58,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-28 03:55:58,346 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 720 transitions, 10137 flow [2024-06-28 03:55:58,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:58,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:58,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:58,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:55:58,346 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:58,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2013250575, now seen corresponding path program 9 times [2024-06-28 03:55:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:58,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825598511] [2024-06-28 03:55:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:58,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:01,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:01,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825598511] [2024-06-28 03:56:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825598511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:56:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330402585] [2024-06-28 03:56:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:56:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:56:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:56:01,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:01,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 720 transitions, 10137 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:01,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:01,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:01,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:05,152 INFO L124 PetriNetUnfolderBase]: 4942/8111 cut-off events. [2024-06-28 03:56:05,152 INFO L125 PetriNetUnfolderBase]: For 733540/733540 co-relation queries the response was YES. [2024-06-28 03:56:05,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59449 conditions, 8111 events. 4942/8111 cut-off events. For 733540/733540 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54875 event pairs, 882 based on Foata normal form. 4/8110 useless extension candidates. Maximal degree in co-relation 59272. Up to 5937 conditions per place. [2024-06-28 03:56:05,269 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 357 selfloop transitions, 420 changer transitions 0/782 dead transitions. [2024-06-28 03:56:05,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 782 transitions, 12848 flow [2024-06-28 03:56:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:56:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:56:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 267 transitions. [2024-06-28 03:56:05,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 03:56:05,271 INFO L175 Difference]: Start difference. First operand has 426 places, 720 transitions, 10137 flow. Second operand 15 states and 267 transitions. [2024-06-28 03:56:05,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 782 transitions, 12848 flow [2024-06-28 03:56:09,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 782 transitions, 12019 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-28 03:56:09,358 INFO L231 Difference]: Finished difference. Result has 431 places, 720 transitions, 10156 flow [2024-06-28 03:56:09,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9308, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10156, PETRI_PLACES=431, PETRI_TRANSITIONS=720} [2024-06-28 03:56:09,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-28 03:56:09,359 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 720 transitions, 10156 flow [2024-06-28 03:56:09,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:09,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:09,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:56:09,360 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:09,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2013578865, now seen corresponding path program 10 times [2024-06-28 03:56:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127913461] [2024-06-28 03:56:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:12,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:12,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127913461] [2024-06-28 03:56:12,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127913461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:12,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:12,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:56:12,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024790053] [2024-06-28 03:56:12,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:12,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:56:12,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:56:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:56:12,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:12,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 720 transitions, 10156 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:12,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:12,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:12,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:16,377 INFO L124 PetriNetUnfolderBase]: 4946/8121 cut-off events. [2024-06-28 03:56:16,377 INFO L125 PetriNetUnfolderBase]: For 732768/732768 co-relation queries the response was YES. [2024-06-28 03:56:16,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59409 conditions, 8121 events. 4946/8121 cut-off events. For 732768/732768 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 55005 event pairs, 882 based on Foata normal form. 4/8120 useless extension candidates. Maximal degree in co-relation 59231. Up to 5942 conditions per place. [2024-06-28 03:56:16,503 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 359 selfloop transitions, 415 changer transitions 0/779 dead transitions. [2024-06-28 03:56:16,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 779 transitions, 12887 flow [2024-06-28 03:56:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:56:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:56:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 250 transitions. [2024-06-28 03:56:16,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:56:16,505 INFO L175 Difference]: Start difference. First operand has 431 places, 720 transitions, 10156 flow. Second operand 14 states and 250 transitions. [2024-06-28 03:56:16,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 779 transitions, 12887 flow [2024-06-28 03:56:20,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 779 transitions, 12122 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-28 03:56:20,549 INFO L231 Difference]: Finished difference. Result has 433 places, 723 transitions, 10286 flow [2024-06-28 03:56:20,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10286, PETRI_PLACES=433, PETRI_TRANSITIONS=723} [2024-06-28 03:56:20,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-28 03:56:20,549 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 723 transitions, 10286 flow [2024-06-28 03:56:20,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:20,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:20,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:20,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:56:20,551 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2013579082, now seen corresponding path program 1 times [2024-06-28 03:56:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:20,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844338433] [2024-06-28 03:56:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844338433] [2024-06-28 03:56:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844338433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:23,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808788] [2024-06-28 03:56:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:23,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:23,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:23,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:23,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:23,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 723 transitions, 10286 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:23,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:23,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:23,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:27,364 INFO L124 PetriNetUnfolderBase]: 4988/8199 cut-off events. [2024-06-28 03:56:27,364 INFO L125 PetriNetUnfolderBase]: For 761460/761464 co-relation queries the response was YES. [2024-06-28 03:56:27,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60473 conditions, 8199 events. 4988/8199 cut-off events. For 761460/761464 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 55759 event pairs, 1237 based on Foata normal form. 6/8200 useless extension candidates. Maximal degree in co-relation 60294. Up to 7160 conditions per place. [2024-06-28 03:56:27,490 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 625 selfloop transitions, 178 changer transitions 0/808 dead transitions. [2024-06-28 03:56:27,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 808 transitions, 13033 flow [2024-06-28 03:56:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:56:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:56:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 238 transitions. [2024-06-28 03:56:27,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:56:27,493 INFO L175 Difference]: Start difference. First operand has 433 places, 723 transitions, 10286 flow. Second operand 14 states and 238 transitions. [2024-06-28 03:56:27,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 808 transitions, 13033 flow [2024-06-28 03:56:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 808 transitions, 12262 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-28 03:56:31,889 INFO L231 Difference]: Finished difference. Result has 438 places, 755 transitions, 10400 flow [2024-06-28 03:56:31,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9533, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10400, PETRI_PLACES=438, PETRI_TRANSITIONS=755} [2024-06-28 03:56:31,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-28 03:56:31,890 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 755 transitions, 10400 flow [2024-06-28 03:56:31,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:31,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:31,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:56:31,892 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:31,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2018227656, now seen corresponding path program 1 times [2024-06-28 03:56:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:31,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96860493] [2024-06-28 03:56:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96860493] [2024-06-28 03:56:34,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96860493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:34,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:34,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:34,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168511030] [2024-06-28 03:56:34,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:34,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:34,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:34,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:34,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 755 transitions, 10400 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:34,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:34,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:38,040 INFO L124 PetriNetUnfolderBase]: 4996/8217 cut-off events. [2024-06-28 03:56:38,040 INFO L125 PetriNetUnfolderBase]: For 774283/774290 co-relation queries the response was YES. [2024-06-28 03:56:38,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60727 conditions, 8217 events. 4996/8217 cut-off events. For 774283/774290 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 55974 event pairs, 1252 based on Foata normal form. 8/8223 useless extension candidates. Maximal degree in co-relation 60546. Up to 7527 conditions per place. [2024-06-28 03:56:38,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 710 selfloop transitions, 79 changer transitions 0/794 dead transitions. [2024-06-28 03:56:38,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 794 transitions, 12169 flow [2024-06-28 03:56:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:56:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:56:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-28 03:56:38,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-28 03:56:38,157 INFO L175 Difference]: Start difference. First operand has 438 places, 755 transitions, 10400 flow. Second operand 12 states and 194 transitions. [2024-06-28 03:56:38,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 794 transitions, 12169 flow [2024-06-28 03:56:42,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 794 transitions, 11956 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 03:56:42,088 INFO L231 Difference]: Finished difference. Result has 443 places, 757 transitions, 10401 flow [2024-06-28 03:56:42,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10187, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10401, PETRI_PLACES=443, PETRI_TRANSITIONS=757} [2024-06-28 03:56:42,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-28 03:56:42,089 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 757 transitions, 10401 flow [2024-06-28 03:56:42,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:42,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:42,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:42,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:56:42,090 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:42,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1291020081, now seen corresponding path program 11 times [2024-06-28 03:56:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138399709] [2024-06-28 03:56:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:42,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:44,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:44,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138399709] [2024-06-28 03:56:44,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138399709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:44,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:56:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466260546] [2024-06-28 03:56:44,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:44,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:56:44,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:56:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:56:44,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:44,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 757 transitions, 10401 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:44,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:44,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:44,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:48,408 INFO L124 PetriNetUnfolderBase]: 5022/8237 cut-off events. [2024-06-28 03:56:48,409 INFO L125 PetriNetUnfolderBase]: For 797072/797072 co-relation queries the response was YES. [2024-06-28 03:56:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61400 conditions, 8237 events. 5022/8237 cut-off events. For 797072/797072 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 55878 event pairs, 886 based on Foata normal form. 2/8234 useless extension candidates. Maximal degree in co-relation 61217. Up to 6037 conditions per place. [2024-06-28 03:56:48,527 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 399 selfloop transitions, 411 changer transitions 0/815 dead transitions. [2024-06-28 03:56:48,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 815 transitions, 13484 flow [2024-06-28 03:56:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:56:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:56:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2024-06-28 03:56:48,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-28 03:56:48,529 INFO L175 Difference]: Start difference. First operand has 443 places, 757 transitions, 10401 flow. Second operand 13 states and 237 transitions. [2024-06-28 03:56:48,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 815 transitions, 13484 flow [2024-06-28 03:56:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 815 transitions, 13288 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 03:56:52,011 INFO L231 Difference]: Finished difference. Result has 448 places, 763 transitions, 11132 flow [2024-06-28 03:56:52,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10205, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11132, PETRI_PLACES=448, PETRI_TRANSITIONS=763} [2024-06-28 03:56:52,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-28 03:56:52,012 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 763 transitions, 11132 flow [2024-06-28 03:56:52,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:52,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:52,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:52,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 03:56:52,013 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:52,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2018220495, now seen corresponding path program 12 times [2024-06-28 03:56:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329434142] [2024-06-28 03:56:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:52,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:54,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329434142] [2024-06-28 03:56:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329434142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:56:54,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781877673] [2024-06-28 03:56:54,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:54,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:56:54,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:56:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:56:54,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:54,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 763 transitions, 11132 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:54,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:54,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:54,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:58,640 INFO L124 PetriNetUnfolderBase]: 5016/8229 cut-off events. [2024-06-28 03:56:58,640 INFO L125 PetriNetUnfolderBase]: For 802242/802242 co-relation queries the response was YES. [2024-06-28 03:56:58,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62330 conditions, 8229 events. 5016/8229 cut-off events. For 802242/802242 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 55808 event pairs, 878 based on Foata normal form. 2/8226 useless extension candidates. Maximal degree in co-relation 62146. Up to 6032 conditions per place. [2024-06-28 03:56:58,756 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 396 selfloop transitions, 413 changer transitions 0/814 dead transitions. [2024-06-28 03:56:58,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 814 transitions, 13894 flow [2024-06-28 03:56:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:56:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:56:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-28 03:56:58,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43040293040293043 [2024-06-28 03:56:58,758 INFO L175 Difference]: Start difference. First operand has 448 places, 763 transitions, 11132 flow. Second operand 13 states and 235 transitions. [2024-06-28 03:56:58,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 814 transitions, 13894 flow [2024-06-28 03:57:02,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 814 transitions, 13074 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-28 03:57:02,963 INFO L231 Difference]: Finished difference. Result has 452 places, 763 transitions, 11145 flow [2024-06-28 03:57:02,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10312, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11145, PETRI_PLACES=452, PETRI_TRANSITIONS=763} [2024-06-28 03:57:02,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-28 03:57:02,966 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 763 transitions, 11145 flow [2024-06-28 03:57:02,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:02,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:02,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:02,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 03:57:02,967 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:02,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:02,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2018220712, now seen corresponding path program 2 times [2024-06-28 03:57:02,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:02,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451995903] [2024-06-28 03:57:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451995903] [2024-06-28 03:57:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451995903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:05,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:05,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:57:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312927041] [2024-06-28 03:57:05,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:05,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:57:05,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:57:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:57:06,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:06,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 763 transitions, 11145 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:06,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:06,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:06,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:09,453 INFO L124 PetriNetUnfolderBase]: 5026/8259 cut-off events. [2024-06-28 03:57:09,453 INFO L125 PetriNetUnfolderBase]: For 817107/817111 co-relation queries the response was YES. [2024-06-28 03:57:09,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62523 conditions, 8259 events. 5026/8259 cut-off events. For 817107/817111 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 56254 event pairs, 1241 based on Foata normal form. 6/8260 useless extension candidates. Maximal degree in co-relation 62338. Up to 7210 conditions per place. [2024-06-28 03:57:09,578 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 632 selfloop transitions, 177 changer transitions 0/814 dead transitions. [2024-06-28 03:57:09,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 814 transitions, 13514 flow [2024-06-28 03:57:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:57:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:57:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 225 transitions. [2024-06-28 03:57:09,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2024-06-28 03:57:09,580 INFO L175 Difference]: Start difference. First operand has 452 places, 763 transitions, 11145 flow. Second operand 13 states and 225 transitions. [2024-06-28 03:57:09,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 814 transitions, 13514 flow [2024-06-28 03:57:14,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 814 transitions, 12715 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-28 03:57:14,412 INFO L231 Difference]: Finished difference. Result has 454 places, 766 transitions, 10753 flow [2024-06-28 03:57:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10346, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10753, PETRI_PLACES=454, PETRI_TRANSITIONS=766} [2024-06-28 03:57:14,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-28 03:57:14,422 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 766 transitions, 10753 flow [2024-06-28 03:57:14,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:14,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:14,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 03:57:14,422 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:14,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -165219656, now seen corresponding path program 2 times [2024-06-28 03:57:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:14,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300328937] [2024-06-28 03:57:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:17,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300328937] [2024-06-28 03:57:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300328937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:17,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:17,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:17,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008777249] [2024-06-28 03:57:17,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:17,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:17,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:17,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:17,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 766 transitions, 10753 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:17,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:17,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:17,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:20,857 INFO L124 PetriNetUnfolderBase]: 5034/8281 cut-off events. [2024-06-28 03:57:20,857 INFO L125 PetriNetUnfolderBase]: For 825688/825701 co-relation queries the response was YES. [2024-06-28 03:57:20,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61946 conditions, 8281 events. 5034/8281 cut-off events. For 825688/825701 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 56469 event pairs, 1266 based on Foata normal form. 11/8290 useless extension candidates. Maximal degree in co-relation 61760. Up to 7595 conditions per place. [2024-06-28 03:57:20,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 727 selfloop transitions, 70 changer transitions 0/802 dead transitions. [2024-06-28 03:57:20,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 802 transitions, 12563 flow [2024-06-28 03:57:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:57:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:57:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 03:57:20,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 03:57:20,976 INFO L175 Difference]: Start difference. First operand has 454 places, 766 transitions, 10753 flow. Second operand 10 states and 164 transitions. [2024-06-28 03:57:20,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 802 transitions, 12563 flow [2024-06-28 03:57:25,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 802 transitions, 12191 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-28 03:57:25,049 INFO L231 Difference]: Finished difference. Result has 455 places, 772 transitions, 10645 flow [2024-06-28 03:57:25,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10645, PETRI_PLACES=455, PETRI_TRANSITIONS=772} [2024-06-28 03:57:25,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-28 03:57:25,050 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 772 transitions, 10645 flow [2024-06-28 03:57:25,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:25,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:25,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 03:57:25,051 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:25,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash -156879416, now seen corresponding path program 3 times [2024-06-28 03:57:25,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:25,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532067238] [2024-06-28 03:57:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:25,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:28,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:28,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532067238] [2024-06-28 03:57:28,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532067238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:28,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:28,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969968343] [2024-06-28 03:57:28,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:28,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:28,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:28,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 772 transitions, 10645 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:28,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:28,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:28,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:31,146 INFO L124 PetriNetUnfolderBase]: 5063/8322 cut-off events. [2024-06-28 03:57:31,146 INFO L125 PetriNetUnfolderBase]: For 852738/852751 co-relation queries the response was YES. [2024-06-28 03:57:31,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62427 conditions, 8322 events. 5063/8322 cut-off events. For 852738/852751 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 56866 event pairs, 1269 based on Foata normal form. 11/8331 useless extension candidates. Maximal degree in co-relation 62239. Up to 7589 conditions per place. [2024-06-28 03:57:31,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 717 selfloop transitions, 85 changer transitions 0/807 dead transitions. [2024-06-28 03:57:31,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 807 transitions, 12711 flow [2024-06-28 03:57:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:57:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:57:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 03:57:31,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 03:57:31,499 INFO L175 Difference]: Start difference. First operand has 455 places, 772 transitions, 10645 flow. Second operand 10 states and 166 transitions. [2024-06-28 03:57:31,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 807 transitions, 12711 flow [2024-06-28 03:57:36,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 807 transitions, 12540 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 03:57:36,321 INFO L231 Difference]: Finished difference. Result has 459 places, 777 transitions, 10792 flow [2024-06-28 03:57:36,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10474, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10792, PETRI_PLACES=459, PETRI_TRANSITIONS=777} [2024-06-28 03:57:36,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-28 03:57:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 777 transitions, 10792 flow [2024-06-28 03:57:36,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:36,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:36,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 03:57:36,322 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -169182107, now seen corresponding path program 13 times [2024-06-28 03:57:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971985891] [2024-06-28 03:57:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:39,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971985891] [2024-06-28 03:57:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971985891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:39,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:39,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791767921] [2024-06-28 03:57:39,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:39,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:39,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:39,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:39,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:39,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 777 transitions, 10792 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:39,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:39,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:39,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:42,438 INFO L124 PetriNetUnfolderBase]: 5057/8295 cut-off events. [2024-06-28 03:57:42,438 INFO L125 PetriNetUnfolderBase]: For 852145/852145 co-relation queries the response was YES. [2024-06-28 03:57:42,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62332 conditions, 8295 events. 5057/8295 cut-off events. For 852145/852145 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 56413 event pairs, 969 based on Foata normal form. 2/8296 useless extension candidates. Maximal degree in co-relation 62142. Up to 7633 conditions per place. [2024-06-28 03:57:42,573 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 745 selfloop transitions, 60 changer transitions 0/810 dead transitions. [2024-06-28 03:57:42,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 810 transitions, 12527 flow [2024-06-28 03:57:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:57:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:57:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 03:57:42,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-28 03:57:42,575 INFO L175 Difference]: Start difference. First operand has 459 places, 777 transitions, 10792 flow. Second operand 11 states and 178 transitions. [2024-06-28 03:57:42,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 810 transitions, 12527 flow [2024-06-28 03:57:47,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 810 transitions, 12333 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 03:57:47,355 INFO L231 Difference]: Finished difference. Result has 464 places, 777 transitions, 10724 flow [2024-06-28 03:57:47,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10598, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10724, PETRI_PLACES=464, PETRI_TRANSITIONS=777} [2024-06-28 03:57:47,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-28 03:57:47,356 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 777 transitions, 10724 flow [2024-06-28 03:57:47,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:47,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:47,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:47,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 03:57:47,357 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:47,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash -892657871, now seen corresponding path program 14 times [2024-06-28 03:57:47,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:47,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420776061] [2024-06-28 03:57:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:47,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:50,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:50,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420776061] [2024-06-28 03:57:50,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420776061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:50,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:50,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:57:50,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788755398] [2024-06-28 03:57:50,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:50,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:57:50,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:57:50,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:57:50,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:50,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 777 transitions, 10724 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:50,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:50,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:50,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:54,121 INFO L124 PetriNetUnfolderBase]: 5051/8290 cut-off events. [2024-06-28 03:57:54,122 INFO L125 PetriNetUnfolderBase]: For 851029/851029 co-relation queries the response was YES. [2024-06-28 03:57:54,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62099 conditions, 8290 events. 5051/8290 cut-off events. For 851029/851029 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 56350 event pairs, 976 based on Foata normal form. 2/8287 useless extension candidates. Maximal degree in co-relation 61907. Up to 6091 conditions per place. [2024-06-28 03:57:54,244 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 411 selfloop transitions, 402 changer transitions 0/818 dead transitions. [2024-06-28 03:57:54,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 818 transitions, 13241 flow [2024-06-28 03:57:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:57:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:57:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-28 03:57:54,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-28 03:57:54,246 INFO L175 Difference]: Start difference. First operand has 464 places, 777 transitions, 10724 flow. Second operand 11 states and 199 transitions. [2024-06-28 03:57:54,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 818 transitions, 13241 flow [2024-06-28 03:57:59,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 818 transitions, 13093 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-28 03:57:59,386 INFO L231 Difference]: Finished difference. Result has 466 places, 777 transitions, 11386 flow [2024-06-28 03:57:59,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10576, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11386, PETRI_PLACES=466, PETRI_TRANSITIONS=777} [2024-06-28 03:57:59,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-28 03:57:59,387 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 777 transitions, 11386 flow [2024-06-28 03:57:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:59,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:59,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 03:57:59,387 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:57:59,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -933911491, now seen corresponding path program 15 times [2024-06-28 03:57:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770205572] [2024-06-28 03:57:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:01,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:01,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770205572] [2024-06-28 03:58:01,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770205572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:01,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:01,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112950426] [2024-06-28 03:58:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:01,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:58:01,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 777 transitions, 11386 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:01,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:01,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:58:01,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:05,119 INFO L124 PetriNetUnfolderBase]: 5045/8282 cut-off events. [2024-06-28 03:58:05,120 INFO L125 PetriNetUnfolderBase]: For 854735/854735 co-relation queries the response was YES. [2024-06-28 03:58:05,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63040 conditions, 8282 events. 5045/8282 cut-off events. For 854735/854735 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 56263 event pairs, 976 based on Foata normal form. 2/8279 useless extension candidates. Maximal degree in co-relation 62847. Up to 6086 conditions per place. [2024-06-28 03:58:05,257 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 406 selfloop transitions, 406 changer transitions 0/817 dead transitions. [2024-06-28 03:58:05,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 817 transitions, 13665 flow [2024-06-28 03:58:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:58:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:58:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-28 03:58:05,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-28 03:58:05,259 INFO L175 Difference]: Start difference. First operand has 466 places, 777 transitions, 11386 flow. Second operand 11 states and 197 transitions. [2024-06-28 03:58:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 817 transitions, 13665 flow [2024-06-28 03:58:11,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 817 transitions, 12721 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-28 03:58:11,125 INFO L231 Difference]: Finished difference. Result has 465 places, 777 transitions, 11261 flow [2024-06-28 03:58:11,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11261, PETRI_PLACES=465, PETRI_TRANSITIONS=777} [2024-06-28 03:58:11,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-28 03:58:11,133 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 777 transitions, 11261 flow [2024-06-28 03:58:11,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:11,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:11,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:11,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 03:58:11,133 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:11,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash -165457240, now seen corresponding path program 3 times [2024-06-28 03:58:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828553171] [2024-06-28 03:58:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:11,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:14,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:14,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828553171] [2024-06-28 03:58:14,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828553171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:14,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:14,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:14,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690335613] [2024-06-28 03:58:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:14,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:58:14,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 777 transitions, 11261 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:14,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:14,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:58:14,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:17,398 INFO L124 PetriNetUnfolderBase]: 5039/8286 cut-off events. [2024-06-28 03:58:17,398 INFO L125 PetriNetUnfolderBase]: For 851438/851444 co-relation queries the response was YES. [2024-06-28 03:58:17,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62752 conditions, 8286 events. 5039/8286 cut-off events. For 851438/851444 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 56462 event pairs, 1274 based on Foata normal form. 8/8289 useless extension candidates. Maximal degree in co-relation 62558. Up to 7236 conditions per place. [2024-06-28 03:58:17,530 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 632 selfloop transitions, 176 changer transitions 0/813 dead transitions. [2024-06-28 03:58:17,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 813 transitions, 13280 flow [2024-06-28 03:58:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:58:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:58:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-28 03:58:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-28 03:58:17,532 INFO L175 Difference]: Start difference. First operand has 465 places, 777 transitions, 11261 flow. Second operand 11 states and 189 transitions. [2024-06-28 03:58:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 813 transitions, 13280 flow [2024-06-28 03:58:21,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 813 transitions, 12362 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-28 03:58:21,912 INFO L231 Difference]: Finished difference. Result has 464 places, 777 transitions, 10702 flow [2024-06-28 03:58:21,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10702, PETRI_PLACES=464, PETRI_TRANSITIONS=777} [2024-06-28 03:58:21,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-28 03:58:21,912 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 777 transitions, 10702 flow [2024-06-28 03:58:21,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:21,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:21,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:21,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 03:58:21,913 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:21,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:21,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1069587901, now seen corresponding path program 16 times [2024-06-28 03:58:21,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:21,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739866220] [2024-06-28 03:58:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:21,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:24,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:24,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739866220] [2024-06-28 03:58:24,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739866220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:24,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:24,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223655575] [2024-06-28 03:58:24,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:24,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:24,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:24,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:58:24,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 777 transitions, 10702 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:24,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:24,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:58:24,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:27,952 INFO L124 PetriNetUnfolderBase]: 5059/8304 cut-off events. [2024-06-28 03:58:27,952 INFO L125 PetriNetUnfolderBase]: For 875753/875757 co-relation queries the response was YES. [2024-06-28 03:58:28,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62177 conditions, 8304 events. 5059/8304 cut-off events. For 875753/875757 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 56611 event pairs, 1192 based on Foata normal form. 8/8310 useless extension candidates. Maximal degree in co-relation 61982. Up to 7322 conditions per place. [2024-06-28 03:58:28,079 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 646 selfloop transitions, 175 changer transitions 0/826 dead transitions. [2024-06-28 03:58:28,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 826 transitions, 12893 flow [2024-06-28 03:58:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:58:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:58:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 03:58:28,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:58:28,081 INFO L175 Difference]: Start difference. First operand has 464 places, 777 transitions, 10702 flow. Second operand 11 states and 187 transitions. [2024-06-28 03:58:28,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 826 transitions, 12893 flow [2024-06-28 03:58:33,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 826 transitions, 12499 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-28 03:58:33,320 INFO L231 Difference]: Finished difference. Result has 464 places, 783 transitions, 10808 flow [2024-06-28 03:58:33,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10310, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10808, PETRI_PLACES=464, PETRI_TRANSITIONS=783} [2024-06-28 03:58:33,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-28 03:58:33,321 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 783 transitions, 10808 flow [2024-06-28 03:58:33,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:33,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:33,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 03:58:33,322 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:33,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1811336893, now seen corresponding path program 17 times [2024-06-28 03:58:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:33,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254696104] [2024-06-28 03:58:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:36,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254696104] [2024-06-28 03:58:36,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254696104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:36,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:36,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:58:36,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883347606] [2024-06-28 03:58:36,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:58:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:58:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:58:36,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:58:36,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 783 transitions, 10808 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:36,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:58:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:39,676 INFO L124 PetriNetUnfolderBase]: 5063/8312 cut-off events. [2024-06-28 03:58:39,676 INFO L125 PetriNetUnfolderBase]: For 873253/873257 co-relation queries the response was YES. [2024-06-28 03:58:39,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62180 conditions, 8312 events. 5063/8312 cut-off events. For 873253/873257 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 56613 event pairs, 1186 based on Foata normal form. 8/8318 useless extension candidates. Maximal degree in co-relation 61984. Up to 7327 conditions per place. [2024-06-28 03:58:39,803 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 649 selfloop transitions, 172 changer transitions 0/826 dead transitions. [2024-06-28 03:58:39,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 826 transitions, 12936 flow [2024-06-28 03:58:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:58:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:58:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 03:58:39,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-28 03:58:39,804 INFO L175 Difference]: Start difference. First operand has 464 places, 783 transitions, 10808 flow. Second operand 11 states and 184 transitions. [2024-06-28 03:58:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 826 transitions, 12936 flow [2024-06-28 03:58:45,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 826 transitions, 12549 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-28 03:58:45,086 INFO L231 Difference]: Finished difference. Result has 466 places, 786 transitions, 10863 flow [2024-06-28 03:58:45,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10432, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10863, PETRI_PLACES=466, PETRI_TRANSITIONS=786} [2024-06-28 03:58:45,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-28 03:58:45,087 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 786 transitions, 10863 flow [2024-06-28 03:58:45,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:45,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:45,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 03:58:45,088 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:58:45,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -391472929, now seen corresponding path program 18 times [2024-06-28 03:58:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:45,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532701341] [2024-06-28 03:58:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15