./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe003_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.opt.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-76401ed-m [2024-06-20 16:48:47,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:48:47,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:48:47,821 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:48:47,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:48:47,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:48:47,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:48:47,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:48:47,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:48:47,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:48:47,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:48:47,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:48:47,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:48:47,838 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:48:47,838 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:48:47,838 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:48:47,839 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:48:47,839 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:48:47,839 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:48:47,839 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:48:47,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:48:47,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:48:47,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:48:47,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:48:47,841 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:48:47,841 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:48:47,841 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:48:47,841 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:48:47,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:48:47,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:48:47,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:48:47,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:48:47,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:48:47,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:48:47,843 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:48:47,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:48:47,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:48:47,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:48:48,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:48:48,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:48:48,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:48:48,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:48:48,075 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:48:48,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-20 16:48:49,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:48:49,264 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:48:49,265 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-20 16:48:49,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e94cc969/1758a175837e47d6a6d7458b40daf3f2/FLAG674c29015 [2024-06-20 16:48:49,290 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e94cc969/1758a175837e47d6a6d7458b40daf3f2 [2024-06-20 16:48:49,292 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:48:49,297 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:48:49,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe003_power.opt.yml/witness.yml [2024-06-20 16:48:49,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:48:49,475 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:48:49,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:48:49,477 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:48:49,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:48:49,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:48:49" (1/2) ... [2024-06-20 16:48:49,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f50c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:49, skipping insertion in model container [2024-06-20 16:48:49,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:48:49" (1/2) ... [2024-06-20 16:48:49,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2602130f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:49, skipping insertion in model container [2024-06-20 16:48:49,483 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:48:49" (2/2) ... [2024-06-20 16:48:49,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f50c2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:49, skipping insertion in model container [2024-06-20 16:48:49,484 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:48:49" (2/2) ... [2024-06-20 16:48:49,484 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:48:49,596 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:48:49,597 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-20 16:48:49,598 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-20 16:48:49,598 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-20 16:48:49,598 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:48:49,598 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-20 16:48:49,635 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:48:49,973 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:48:49,983 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:48:50,094 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:48:50,124 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:48:50,124 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50 WrapperNode [2024-06-20 16:48:50,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:48:50,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:48:50,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:48:50,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:48:50,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,176 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-20 16:48:50,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:48:50,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:48:50,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:48:50,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:48:50,201 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,205 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,225 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-20 16:48:50,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,225 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,240 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:48:50,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:48:50,252 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:48:50,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:48:50,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (1/1) ... [2024-06-20 16:48:50,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:48:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:48:50,285 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) [2024-06-20 16:48:50,306 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 [2024-06-20 16:48:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 16:48:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 16:48:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 16:48:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 16:48:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:48:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:48:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:48:50,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:48:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:48:50,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:48:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:48:50,334 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:48:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:48:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 16:48:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:48:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:48:50,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:48:50,340 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:48:50,504 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:48:50,505 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:48:50,970 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:48:50,970 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:48:51,402 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:48:51,402 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:48:51,403 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:48:51 BoogieIcfgContainer [2024-06-20 16:48:51,403 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:48:51,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:48:51,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:48:51,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:48:51,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:48:49" (1/4) ... [2024-06-20 16:48:51,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b58204f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:48:51, skipping insertion in model container [2024-06-20 16:48:51,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:48:49" (2/4) ... [2024-06-20 16:48:51,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b58204f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:48:51, skipping insertion in model container [2024-06-20 16:48:51,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:50" (3/4) ... [2024-06-20 16:48:51,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b58204f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:48:51, skipping insertion in model container [2024-06-20 16:48:51,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:48:51" (4/4) ... [2024-06-20 16:48:51,411 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.opt.i [2024-06-20 16:48:51,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:48:51,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:48:51,427 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:48:51,522 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:48:51,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:48:51,573 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:48:51,574 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:48:51,576 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 56 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. [2024-06-20 16:48:51,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:48:51,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:48:51,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:48:51,598 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;@49c00d1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:48:51,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:48:51,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:48:51,603 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:48:51,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:48:51,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:51,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:48:51,604 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)] === [2024-06-20 16:48:51,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash 848284857, now seen corresponding path program 1 times [2024-06-20 16:48:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:51,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682621789] [2024-06-20 16:48:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:53,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682621789] [2024-06-20 16:48:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682621789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:48:53,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420522967] [2024-06-20 16:48:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:53,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:48:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:48:53,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:48:53,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:48:53,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:53,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:53,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:48:53,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:53,783 INFO L124 PetriNetUnfolderBase]: 1217/1862 cut-off events. [2024-06-20 16:48:53,783 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 16:48:53,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3809 conditions, 1862 events. 1217/1862 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8623 event pairs, 713 based on Foata normal form. 2/1816 useless extension candidates. Maximal degree in co-relation 3797. Up to 1843 conditions per place. [2024-06-20 16:48:53,795 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-20 16:48:53,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-20 16:48:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:48:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:48:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 16:48:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 16:48:53,805 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-20 16:48:53,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-20 16:48:53,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:53,809 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:48:53,811 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} [2024-06-20 16:48:53,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:48:53,813 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:48:53,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:53,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:53,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:53,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:48:53,814 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)] === [2024-06-20 16:48:53,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash -842003272, now seen corresponding path program 1 times [2024-06-20 16:48:53,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529674518] [2024-06-20 16:48:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:53,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:55,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529674518] [2024-06-20 16:48:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529674518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:55,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:55,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:48:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926942419] [2024-06-20 16:48:55,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:48:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:48:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:48:55,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:55,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:55,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:55,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:55,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:55,624 INFO L124 PetriNetUnfolderBase]: 1709/2563 cut-off events. [2024-06-20 16:48:55,625 INFO L125 PetriNetUnfolderBase]: For 386/386 co-relation queries the response was YES. [2024-06-20 16:48:55,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5867 conditions, 2563 events. 1709/2563 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11573 event pairs, 1050 based on Foata normal form. 3/2564 useless extension candidates. Maximal degree in co-relation 5855. Up to 2530 conditions per place. [2024-06-20 16:48:55,635 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-20 16:48:55,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 278 flow [2024-06-20 16:48:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:48:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:48:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-20 16:48:55,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:48:55,637 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 84 transitions. [2024-06-20 16:48:55,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 278 flow [2024-06-20 16:48:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:48:55,639 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-20 16:48:55,639 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-20 16:48:55,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-20 16:48:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-20 16:48:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:55,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:48:55,641 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)] === [2024-06-20 16:48:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -332296489, now seen corresponding path program 1 times [2024-06-20 16:48:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467009996] [2024-06-20 16:48:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:56,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:56,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467009996] [2024-06-20 16:48:56,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467009996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:56,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:56,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:48:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213739657] [2024-06-20 16:48:56,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:56,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:48:56,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:48:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:48:56,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:56,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:56,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:56,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:56,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:57,514 INFO L124 PetriNetUnfolderBase]: 1703/2554 cut-off events. [2024-06-20 16:48:57,514 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-20 16:48:57,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6489 conditions, 2554 events. 1703/2554 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11499 event pairs, 899 based on Foata normal form. 3/2555 useless extension candidates. Maximal degree in co-relation 6474. Up to 2502 conditions per place. [2024-06-20 16:48:57,524 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-20 16:48:57,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 368 flow [2024-06-20 16:48:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:48:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:48:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-20 16:48:57,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-20 16:48:57,526 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 103 transitions. [2024-06-20 16:48:57,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 368 flow [2024-06-20 16:48:57,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 366 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 16:48:57,529 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 200 flow [2024-06-20 16:48:57,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-20 16:48:57,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 16:48:57,530 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 200 flow [2024-06-20 16:48:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:57,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:48:57,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1711255369, now seen corresponding path program 1 times [2024-06-20 16:48:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107754864] [2024-06-20 16:48:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:59,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107754864] [2024-06-20 16:48:59,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107754864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:59,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:59,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:48:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181022453] [2024-06-20 16:48:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:59,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:48:59,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:48:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:48:59,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:59,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2024-06-20 16:48:59,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:59,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:59,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:59,816 INFO L124 PetriNetUnfolderBase]: 1697/2545 cut-off events. [2024-06-20 16:48:59,816 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2024-06-20 16:48:59,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7103 conditions, 2545 events. 1697/2545 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11440 event pairs, 748 based on Foata normal form. 3/2546 useless extension candidates. Maximal degree in co-relation 7085. Up to 2474 conditions per place. [2024-06-20 16:48:59,829 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-20 16:48:59,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 464 flow [2024-06-20 16:48:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-20 16:48:59,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-20 16:48:59,831 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 200 flow. Second operand 6 states and 122 transitions. [2024-06-20 16:48:59,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 464 flow [2024-06-20 16:48:59,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:59,834 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 236 flow [2024-06-20 16:48:59,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-20 16:48:59,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 16:48:59,835 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 236 flow [2024-06-20 16:48:59,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2024-06-20 16:48:59,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:59,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:48:59,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:59,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1509307658, now seen corresponding path program 1 times [2024-06-20 16:48:59,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:59,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980689451] [2024-06-20 16:48:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:01,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:01,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980689451] [2024-06-20 16:49:01,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980689451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:01,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:01,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:01,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888790119] [2024-06-20 16:49:01,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:01,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:01,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:01,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:01,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:01,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:01,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:01,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:02,316 INFO L124 PetriNetUnfolderBase]: 1688/2530 cut-off events. [2024-06-20 16:49:02,316 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-06-20 16:49:02,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 2530 events. 1688/2530 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11335 event pairs, 579 based on Foata normal form. 6/2534 useless extension candidates. Maximal degree in co-relation 7607. Up to 2421 conditions per place. [2024-06-20 16:49:02,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-20 16:49:02,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 520 flow [2024-06-20 16:49:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:49:02,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-20 16:49:02,351 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 236 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:49:02,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 520 flow [2024-06-20 16:49:02,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 488 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:02,360 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 253 flow [2024-06-20 16:49:02,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-20 16:49:02,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 16:49:02,362 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 253 flow [2024-06-20 16:49:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:02,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:02,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:02,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:49:02,363 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)] === [2024-06-20 16:49:02,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2018931377, now seen corresponding path program 1 times [2024-06-20 16:49:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523043228] [2024-06-20 16:49:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:02,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:04,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:04,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523043228] [2024-06-20 16:49:04,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523043228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:04,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:04,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:49:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425808407] [2024-06-20 16:49:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:49:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:49:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:49:04,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:49:04,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 253 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) [2024-06-20 16:49:04,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:04,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:49:04,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:05,019 INFO L124 PetriNetUnfolderBase]: 1340/2089 cut-off events. [2024-06-20 16:49:05,020 INFO L125 PetriNetUnfolderBase]: For 4185/4233 co-relation queries the response was YES. [2024-06-20 16:49:05,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6558 conditions, 2089 events. 1340/2089 cut-off events. For 4185/4233 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9935 event pairs, 506 based on Foata normal form. 4/2010 useless extension candidates. Maximal degree in co-relation 6537. Up to 1959 conditions per place. [2024-06-20 16:49:05,031 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-20 16:49:05,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 417 flow [2024-06-20 16:49:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:49:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:49:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-20 16:49:05,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:49:05,033 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 253 flow. Second operand 5 states and 91 transitions. [2024-06-20 16:49:05,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 417 flow [2024-06-20 16:49:05,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 376 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:05,036 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 257 flow [2024-06-20 16:49:05,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-20 16:49:05,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 16:49:05,039 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 257 flow [2024-06-20 16:49:05,039 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) [2024-06-20 16:49:05,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:05,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:05,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:49:05,040 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)] === [2024-06-20 16:49:05,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1858194646, now seen corresponding path program 1 times [2024-06-20 16:49:05,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:05,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027096265] [2024-06-20 16:49:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027096265] [2024-06-20 16:49:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027096265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864253134] [2024-06-20 16:49:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:07,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:07,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:07,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:07,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:07,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:08,086 INFO L124 PetriNetUnfolderBase]: 1696/2547 cut-off events. [2024-06-20 16:49:08,087 INFO L125 PetriNetUnfolderBase]: For 6371/6381 co-relation queries the response was YES. [2024-06-20 16:49:08,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 2547 events. 1696/2547 cut-off events. For 6371/6381 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11419 event pairs, 583 based on Foata normal form. 16/2560 useless extension candidates. Maximal degree in co-relation 8539. Up to 2400 conditions per place. [2024-06-20 16:49:08,104 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-20 16:49:08,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 553 flow [2024-06-20 16:49:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 16:49:08,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-20 16:49:08,106 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 257 flow. Second operand 6 states and 103 transitions. [2024-06-20 16:49:08,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 553 flow [2024-06-20 16:49:08,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 530 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:08,110 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 346 flow [2024-06-20 16:49:08,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-20 16:49:08,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-20 16:49:08,111 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 346 flow [2024-06-20 16:49:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:08,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:08,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:08,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:49:08,112 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)] === [2024-06-20 16:49:08,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 280032688, now seen corresponding path program 1 times [2024-06-20 16:49:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557089639] [2024-06-20 16:49:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557089639] [2024-06-20 16:49:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557089639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:09,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:09,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084913893] [2024-06-20 16:49:09,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:09,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:09,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:09,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:09,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:09,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:09,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:10,853 INFO L124 PetriNetUnfolderBase]: 1760/2646 cut-off events. [2024-06-20 16:49:10,853 INFO L125 PetriNetUnfolderBase]: For 8849/8849 co-relation queries the response was YES. [2024-06-20 16:49:10,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 2646 events. 1760/2646 cut-off events. For 8849/8849 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11911 event pairs, 599 based on Foata normal form. 2/2644 useless extension candidates. Maximal degree in co-relation 9913. Up to 2447 conditions per place. [2024-06-20 16:49:10,865 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 78 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-20 16:49:10,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 788 flow [2024-06-20 16:49:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:49:10,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:49:10,867 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 346 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:49:10,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 788 flow [2024-06-20 16:49:10,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 753 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:10,874 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-20 16:49:10,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-20 16:49:10,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 16:49:10,874 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-20 16:49:10,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:10,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:10,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:10,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:49:10,875 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)] === [2024-06-20 16:49:10,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1126509966, now seen corresponding path program 2 times [2024-06-20 16:49:10,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:10,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778234331] [2024-06-20 16:49:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:10,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:12,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778234331] [2024-06-20 16:49:12,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778234331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:12,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:12,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347894386] [2024-06-20 16:49:12,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:12,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:12,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:12,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:12,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:12,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:13,672 INFO L124 PetriNetUnfolderBase]: 1782/2679 cut-off events. [2024-06-20 16:49:13,673 INFO L125 PetriNetUnfolderBase]: For 10793/10793 co-relation queries the response was YES. [2024-06-20 16:49:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10614 conditions, 2679 events. 1782/2679 cut-off events. For 10793/10793 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12042 event pairs, 623 based on Foata normal form. 3/2678 useless extension candidates. Maximal degree in co-relation 10584. Up to 2461 conditions per place. [2024-06-20 16:49:13,687 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2024-06-20 16:49:13,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 911 flow [2024-06-20 16:49:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:49:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:49:13,688 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:49:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 911 flow [2024-06-20 16:49:13,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 871 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:13,700 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 634 flow [2024-06-20 16:49:13,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2024-06-20 16:49:13,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 16:49:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 634 flow [2024-06-20 16:49:13,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:13,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:13,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:13,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:49:13,702 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)] === [2024-06-20 16:49:13,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1790902896, now seen corresponding path program 3 times [2024-06-20 16:49:13,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:13,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286424709] [2024-06-20 16:49:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:13,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:15,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:15,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286424709] [2024-06-20 16:49:15,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286424709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:15,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:15,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:15,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002217039] [2024-06-20 16:49:15,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:15,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:15,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:15,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:15,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:15,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:15,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:15,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:16,536 INFO L124 PetriNetUnfolderBase]: 1752/2635 cut-off events. [2024-06-20 16:49:16,536 INFO L125 PetriNetUnfolderBase]: For 13085/13095 co-relation queries the response was YES. [2024-06-20 16:49:16,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10613 conditions, 2635 events. 1752/2635 cut-off events. For 13085/13095 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11800 event pairs, 605 based on Foata normal form. 17/2648 useless extension candidates. Maximal degree in co-relation 10581. Up to 2435 conditions per place. [2024-06-20 16:49:16,550 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 70 selfloop transitions, 30 changer transitions 0/103 dead transitions. [2024-06-20 16:49:16,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 900 flow [2024-06-20 16:49:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:49:16,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 16:49:16,551 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 634 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:49:16,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 900 flow [2024-06-20 16:49:16,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 814 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:16,566 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 622 flow [2024-06-20 16:49:16,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=622, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-20 16:49:16,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-20 16:49:16,567 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 622 flow [2024-06-20 16:49:16,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:16,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:16,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:16,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:49:16,568 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)] === [2024-06-20 16:49:16,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash 26120073, now seen corresponding path program 1 times [2024-06-20 16:49:16,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:16,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683609758] [2024-06-20 16:49:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:16,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:18,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:18,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683609758] [2024-06-20 16:49:18,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683609758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:18,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:18,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:18,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060653317] [2024-06-20 16:49:18,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:18,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:18,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:18,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:18,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:18,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:18,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 622 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:18,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:19,468 INFO L124 PetriNetUnfolderBase]: 1778/2671 cut-off events. [2024-06-20 16:49:19,468 INFO L125 PetriNetUnfolderBase]: For 12867/12867 co-relation queries the response was YES. [2024-06-20 16:49:19,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10705 conditions, 2671 events. 1778/2671 cut-off events. For 12867/12867 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11990 event pairs, 620 based on Foata normal form. 4/2673 useless extension candidates. Maximal degree in co-relation 10673. Up to 2576 conditions per place. [2024-06-20 16:49:19,481 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-06-20 16:49:19,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 968 flow [2024-06-20 16:49:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:49:19,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:49:19,483 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 622 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:49:19,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 968 flow [2024-06-20 16:49:19,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 918 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:19,494 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 640 flow [2024-06-20 16:49:19,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=640, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-20 16:49:19,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-20 16:49:19,495 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 640 flow [2024-06-20 16:49:19,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:19,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:19,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:19,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:49:19,495 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)] === [2024-06-20 16:49:19,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash -987947365, now seen corresponding path program 2 times [2024-06-20 16:49:19,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:19,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125153308] [2024-06-20 16:49:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:19,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:21,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125153308] [2024-06-20 16:49:21,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125153308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:21,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:21,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:21,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91740634] [2024-06-20 16:49:21,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:21,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:21,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:21,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:21,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:21,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:21,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 640 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:21,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:21,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:22,908 INFO L124 PetriNetUnfolderBase]: 2062/3086 cut-off events. [2024-06-20 16:49:22,908 INFO L125 PetriNetUnfolderBase]: For 17289/17289 co-relation queries the response was YES. [2024-06-20 16:49:22,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12814 conditions, 3086 events. 2062/3086 cut-off events. For 17289/17289 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14197 event pairs, 605 based on Foata normal form. 2/3084 useless extension candidates. Maximal degree in co-relation 12781. Up to 2545 conditions per place. [2024-06-20 16:49:22,922 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 87 selfloop transitions, 49 changer transitions 0/139 dead transitions. [2024-06-20 16:49:22,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 139 transitions, 1148 flow [2024-06-20 16:49:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:49:22,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:49:22,923 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 640 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:49:22,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 139 transitions, 1148 flow [2024-06-20 16:49:22,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 139 transitions, 1097 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:22,938 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 811 flow [2024-06-20 16:49:22,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=811, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-20 16:49:22,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-20 16:49:22,938 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 811 flow [2024-06-20 16:49:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:22,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:22,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:22,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:49:22,939 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)] === [2024-06-20 16:49:22,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash -301389745, now seen corresponding path program 3 times [2024-06-20 16:49:22,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:22,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959656401] [2024-06-20 16:49:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:24,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:24,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959656401] [2024-06-20 16:49:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959656401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:24,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247283628] [2024-06-20 16:49:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:24,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:24,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:24,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 811 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:24,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:24,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:24,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:25,976 INFO L124 PetriNetUnfolderBase]: 2096/3135 cut-off events. [2024-06-20 16:49:25,976 INFO L125 PetriNetUnfolderBase]: For 22277/22290 co-relation queries the response was YES. [2024-06-20 16:49:25,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 3135 events. 2096/3135 cut-off events. For 22277/22290 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14345 event pairs, 661 based on Foata normal form. 18/3149 useless extension candidates. Maximal degree in co-relation 15003. Up to 2879 conditions per place. [2024-06-20 16:49:25,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-06-20 16:49:25,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1222 flow [2024-06-20 16:49:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:49:25,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 16:49:25,996 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 811 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:49:25,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1222 flow [2024-06-20 16:49:26,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 131 transitions, 1148 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:26,020 INFO L231 Difference]: Finished difference. Result has 84 places, 103 transitions, 904 flow [2024-06-20 16:49:26,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=84, PETRI_TRANSITIONS=103} [2024-06-20 16:49:26,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-20 16:49:26,021 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 103 transitions, 904 flow [2024-06-20 16:49:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:26,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:26,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:26,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:49:26,022 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)] === [2024-06-20 16:49:26,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash 739450279, now seen corresponding path program 1 times [2024-06-20 16:49:26,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:26,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741991395] [2024-06-20 16:49:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:28,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741991395] [2024-06-20 16:49:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741991395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:28,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:28,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:28,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122144657] [2024-06-20 16:49:28,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:28,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:28,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:28,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:28,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 103 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:28,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:28,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:28,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:29,808 INFO L124 PetriNetUnfolderBase]: 2108/3155 cut-off events. [2024-06-20 16:49:29,808 INFO L125 PetriNetUnfolderBase]: For 25804/25817 co-relation queries the response was YES. [2024-06-20 16:49:29,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15934 conditions, 3155 events. 2108/3155 cut-off events. For 25804/25817 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14492 event pairs, 598 based on Foata normal form. 18/3169 useless extension candidates. Maximal degree in co-relation 15898. Up to 2911 conditions per place. [2024-06-20 16:49:29,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 36 changer transitions 0/134 dead transitions. [2024-06-20 16:49:29,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 134 transitions, 1283 flow [2024-06-20 16:49:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:49:29,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:49:29,826 INFO L175 Difference]: Start difference. First operand has 84 places, 103 transitions, 904 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:49:29,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 134 transitions, 1283 flow [2024-06-20 16:49:29,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 134 transitions, 1190 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:29,849 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 930 flow [2024-06-20 16:49:29,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-20 16:49:29,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-20 16:49:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 930 flow [2024-06-20 16:49:29,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:29,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:29,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:49:29,850 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)] === [2024-06-20 16:49:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash -406162941, now seen corresponding path program 1 times [2024-06-20 16:49:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290436467] [2024-06-20 16:49:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:32,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:32,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290436467] [2024-06-20 16:49:32,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290436467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:32,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:32,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030227397] [2024-06-20 16:49:32,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:32,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:32,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:32,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:32,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:32,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 930 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:32,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:32,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:32,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:33,474 INFO L124 PetriNetUnfolderBase]: 2121/3172 cut-off events. [2024-06-20 16:49:33,475 INFO L125 PetriNetUnfolderBase]: For 28628/28628 co-relation queries the response was YES. [2024-06-20 16:49:33,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16505 conditions, 3172 events. 2121/3172 cut-off events. For 28628/28628 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14518 event pairs, 666 based on Foata normal form. 2/3172 useless extension candidates. Maximal degree in co-relation 16468. Up to 3069 conditions per place. [2024-06-20 16:49:33,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-20 16:49:33,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 150 transitions, 1378 flow [2024-06-20 16:49:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:49:33,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:49:33,493 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 930 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:49:33,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 150 transitions, 1378 flow [2024-06-20 16:49:33,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 150 transitions, 1286 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:33,520 INFO L231 Difference]: Finished difference. Result has 89 places, 109 transitions, 926 flow [2024-06-20 16:49:33,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=926, PETRI_PLACES=89, PETRI_TRANSITIONS=109} [2024-06-20 16:49:33,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 16:49:33,521 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 109 transitions, 926 flow [2024-06-20 16:49:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:33,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:33,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:49:33,522 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)] === [2024-06-20 16:49:33,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash 244236114, now seen corresponding path program 1 times [2024-06-20 16:49:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:33,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187251130] [2024-06-20 16:49:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:33,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:35,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:35,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187251130] [2024-06-20 16:49:35,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187251130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:35,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:35,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430933692] [2024-06-20 16:49:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:35,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:35,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 109 transitions, 926 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:35,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:35,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:35,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:36,728 INFO L124 PetriNetUnfolderBase]: 2147/3212 cut-off events. [2024-06-20 16:49:36,728 INFO L125 PetriNetUnfolderBase]: For 33032/33045 co-relation queries the response was YES. [2024-06-20 16:49:36,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17024 conditions, 3212 events. 2147/3212 cut-off events. For 33032/33045 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14770 event pairs, 661 based on Foata normal form. 14/3222 useless extension candidates. Maximal degree in co-relation 16986. Up to 3104 conditions per place. [2024-06-20 16:49:36,746 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2024-06-20 16:49:36,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 145 transitions, 1354 flow [2024-06-20 16:49:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:49:36,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 16:49:36,748 INFO L175 Difference]: Start difference. First operand has 89 places, 109 transitions, 926 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:49:36,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 145 transitions, 1354 flow [2024-06-20 16:49:36,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 145 transitions, 1290 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:36,774 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 976 flow [2024-06-20 16:49:36,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=976, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-20 16:49:36,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-20 16:49:36,774 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 976 flow [2024-06-20 16:49:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:36,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:36,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:36,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:49:36,775 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)] === [2024-06-20 16:49:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 813443281, now seen corresponding path program 2 times [2024-06-20 16:49:36,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:36,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315076767] [2024-06-20 16:49:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:38,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:38,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315076767] [2024-06-20 16:49:38,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315076767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:38,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:38,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:38,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337924847] [2024-06-20 16:49:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:38,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:38,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:38,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:38,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 976 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:38,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:38,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:40,135 INFO L124 PetriNetUnfolderBase]: 2160/3231 cut-off events. [2024-06-20 16:49:40,135 INFO L125 PetriNetUnfolderBase]: For 37045/37045 co-relation queries the response was YES. [2024-06-20 16:49:40,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17688 conditions, 3231 events. 2160/3231 cut-off events. For 37045/37045 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14827 event pairs, 628 based on Foata normal form. 2/3231 useless extension candidates. Maximal degree in co-relation 17648. Up to 3045 conditions per place. [2024-06-20 16:49:40,150 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 38 changer transitions 0/161 dead transitions. [2024-06-20 16:49:40,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 161 transitions, 1522 flow [2024-06-20 16:49:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:49:40,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:49:40,152 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 976 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:49:40,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 161 transitions, 1522 flow [2024-06-20 16:49:40,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 161 transitions, 1470 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:40,184 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1188 flow [2024-06-20 16:49:40,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2024-06-20 16:49:40,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 16:49:40,184 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1188 flow [2024-06-20 16:49:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:40,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:40,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:40,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:49:40,185 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)] === [2024-06-20 16:49:40,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash -561595140, now seen corresponding path program 2 times [2024-06-20 16:49:40,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:40,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113485407] [2024-06-20 16:49:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:40,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:42,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:42,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113485407] [2024-06-20 16:49:42,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113485407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:42,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:42,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:42,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092931728] [2024-06-20 16:49:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:42,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:42,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:42,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1188 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:42,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:42,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:42,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:43,013 INFO L124 PetriNetUnfolderBase]: 2181/3261 cut-off events. [2024-06-20 16:49:43,014 INFO L125 PetriNetUnfolderBase]: For 43049/43062 co-relation queries the response was YES. [2024-06-20 16:49:43,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18752 conditions, 3261 events. 2181/3261 cut-off events. For 43049/43062 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14985 event pairs, 614 based on Foata normal form. 16/3273 useless extension candidates. Maximal degree in co-relation 18708. Up to 2979 conditions per place. [2024-06-20 16:49:43,034 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 44 changer transitions 0/170 dead transitions. [2024-06-20 16:49:43,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1836 flow [2024-06-20 16:49:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:49:43,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 16:49:43,036 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1188 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:49:43,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1836 flow [2024-06-20 16:49:43,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 170 transitions, 1758 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:43,072 INFO L231 Difference]: Finished difference. Result has 102 places, 139 transitions, 1393 flow [2024-06-20 16:49:43,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1393, PETRI_PLACES=102, PETRI_TRANSITIONS=139} [2024-06-20 16:49:43,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-20 16:49:43,073 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 139 transitions, 1393 flow [2024-06-20 16:49:43,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:43,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:43,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:49:43,073 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)] === [2024-06-20 16:49:43,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1043238826, now seen corresponding path program 3 times [2024-06-20 16:49:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701612026] [2024-06-20 16:49:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:45,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:45,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701612026] [2024-06-20 16:49:45,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701612026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:45,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:45,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755815439] [2024-06-20 16:49:45,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:45,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:45,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:45,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:45,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 139 transitions, 1393 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:45,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:45,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:45,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:46,404 INFO L124 PetriNetUnfolderBase]: 2166/3241 cut-off events. [2024-06-20 16:49:46,405 INFO L125 PetriNetUnfolderBase]: For 48032/48045 co-relation queries the response was YES. [2024-06-20 16:49:46,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19386 conditions, 3241 events. 2166/3241 cut-off events. For 48032/48045 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14894 event pairs, 612 based on Foata normal form. 16/3253 useless extension candidates. Maximal degree in co-relation 19339. Up to 2920 conditions per place. [2024-06-20 16:49:46,423 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 64 changer transitions 0/183 dead transitions. [2024-06-20 16:49:46,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 183 transitions, 1951 flow [2024-06-20 16:49:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:49:46,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:49:46,427 INFO L175 Difference]: Start difference. First operand has 102 places, 139 transitions, 1393 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:49:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 183 transitions, 1951 flow [2024-06-20 16:49:46,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 183 transitions, 1832 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:46,474 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1548 flow [2024-06-20 16:49:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1548, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-20 16:49:46,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-20 16:49:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1548 flow [2024-06-20 16:49:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:49:46,475 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)] === [2024-06-20 16:49:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 388270639, now seen corresponding path program 3 times [2024-06-20 16:49:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410986967] [2024-06-20 16:49:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410986967] [2024-06-20 16:49:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410986967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:49,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:49,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904749106] [2024-06-20 16:49:49,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:49,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:49,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1548 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:49,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:49,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:49,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:50,537 INFO L124 PetriNetUnfolderBase]: 2187/3272 cut-off events. [2024-06-20 16:49:50,537 INFO L125 PetriNetUnfolderBase]: For 53131/53144 co-relation queries the response was YES. [2024-06-20 16:49:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20339 conditions, 3272 events. 2187/3272 cut-off events. For 53131/53144 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15060 event pairs, 618 based on Foata normal form. 16/3284 useless extension candidates. Maximal degree in co-relation 20288. Up to 2971 conditions per place. [2024-06-20 16:49:50,557 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 129 selfloop transitions, 50 changer transitions 0/182 dead transitions. [2024-06-20 16:49:50,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 182 transitions, 2066 flow [2024-06-20 16:49:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:49:50,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:49:50,559 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1548 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:49:50,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 182 transitions, 2066 flow [2024-06-20 16:49:50,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 182 transitions, 1945 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:50,605 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1608 flow [2024-06-20 16:49:50,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-06-20 16:49:50,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-20 16:49:50,606 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1608 flow [2024-06-20 16:49:50,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-20 16:49:50,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:50,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:50,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:49:50,606 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)] === [2024-06-20 16:49:50,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash -671208216, now seen corresponding path program 1 times [2024-06-20 16:49:50,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:50,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880379586] [2024-06-20 16:49:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:50,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:53,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:53,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880379586] [2024-06-20 16:49:53,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880379586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:53,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:53,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035008163] [2024-06-20 16:49:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:53,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:53,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1608 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:49:53,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:53,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:53,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:54,461 INFO L124 PetriNetUnfolderBase]: 2359/3554 cut-off events. [2024-06-20 16:49:54,462 INFO L125 PetriNetUnfolderBase]: For 65830/65834 co-relation queries the response was YES. [2024-06-20 16:49:54,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22971 conditions, 3554 events. 2359/3554 cut-off events. For 65830/65834 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16857 event pairs, 502 based on Foata normal form. 4/3556 useless extension candidates. Maximal degree in co-relation 22919. Up to 2864 conditions per place. [2024-06-20 16:49:54,486 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 135 selfloop transitions, 71 changer transitions 0/209 dead transitions. [2024-06-20 16:49:54,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 209 transitions, 2364 flow [2024-06-20 16:49:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:49:54,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:49:54,488 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1608 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:49:54,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 209 transitions, 2364 flow [2024-06-20 16:49:54,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 209 transitions, 2219 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:54,554 INFO L231 Difference]: Finished difference. Result has 117 places, 155 transitions, 1704 flow [2024-06-20 16:49:54,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1704, PETRI_PLACES=117, PETRI_TRANSITIONS=155} [2024-06-20 16:49:54,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-20 16:49:54,554 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 155 transitions, 1704 flow [2024-06-20 16:49:54,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:49:54,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:54,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:54,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:49:54,555 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:54,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -521103242, now seen corresponding path program 1 times [2024-06-20 16:49:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:54,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651045851] [2024-06-20 16:49:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:54,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651045851] [2024-06-20 16:49:56,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651045851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:56,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:56,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:56,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842647541] [2024-06-20 16:49:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:56,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:56,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:49:56,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 155 transitions, 1704 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:56,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:56,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:49:56,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:58,188 INFO L124 PetriNetUnfolderBase]: 2421/3647 cut-off events. [2024-06-20 16:49:58,188 INFO L125 PetriNetUnfolderBase]: For 75395/75420 co-relation queries the response was YES. [2024-06-20 16:49:58,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24072 conditions, 3647 events. 2421/3647 cut-off events. For 75395/75420 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17431 event pairs, 655 based on Foata normal form. 22/3665 useless extension candidates. Maximal degree in co-relation 24019. Up to 3088 conditions per place. [2024-06-20 16:49:58,210 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 126 selfloop transitions, 74 changer transitions 0/203 dead transitions. [2024-06-20 16:49:58,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 203 transitions, 2431 flow [2024-06-20 16:49:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:49:58,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:49:58,212 INFO L175 Difference]: Start difference. First operand has 117 places, 155 transitions, 1704 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:49:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 203 transitions, 2431 flow [2024-06-20 16:49:58,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 2296 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:58,277 INFO L231 Difference]: Finished difference. Result has 120 places, 161 transitions, 1843 flow [2024-06-20 16:49:58,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1843, PETRI_PLACES=120, PETRI_TRANSITIONS=161} [2024-06-20 16:49:58,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-20 16:49:58,278 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 161 transitions, 1843 flow [2024-06-20 16:49:58,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:58,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:58,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:58,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:49:58,278 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)] === [2024-06-20 16:49:58,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:58,279 INFO L85 PathProgramCache]: Analyzing trace with hash -671147766, now seen corresponding path program 2 times [2024-06-20 16:49:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:58,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332530348] [2024-06-20 16:49:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:58,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:00,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:00,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332530348] [2024-06-20 16:50:00,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332530348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:00,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:00,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:00,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140982511] [2024-06-20 16:50:00,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:00,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:00,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 161 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:02,243 INFO L124 PetriNetUnfolderBase]: 2441/3676 cut-off events. [2024-06-20 16:50:02,243 INFO L125 PetriNetUnfolderBase]: For 81776/81780 co-relation queries the response was YES. [2024-06-20 16:50:02,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24909 conditions, 3676 events. 2441/3676 cut-off events. For 81776/81780 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17519 event pairs, 617 based on Foata normal form. 4/3678 useless extension candidates. Maximal degree in co-relation 24854. Up to 3262 conditions per place. [2024-06-20 16:50:02,267 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 139 selfloop transitions, 68 changer transitions 0/210 dead transitions. [2024-06-20 16:50:02,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 210 transitions, 2437 flow [2024-06-20 16:50:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:50:02,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:50:02,269 INFO L175 Difference]: Start difference. First operand has 120 places, 161 transitions, 1843 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:50:02,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 210 transitions, 2437 flow [2024-06-20 16:50:02,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 210 transitions, 2306 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:02,389 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1901 flow [2024-06-20 16:50:02,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-20 16:50:02,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 16:50:02,389 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1901 flow [2024-06-20 16:50:02,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:02,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:02,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:02,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:50:02,390 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)] === [2024-06-20 16:50:02,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1129440404, now seen corresponding path program 3 times [2024-06-20 16:50:02,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:02,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865871853] [2024-06-20 16:50:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:02,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865871853] [2024-06-20 16:50:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865871853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:05,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737785342] [2024-06-20 16:50:05,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:05,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:05,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1901 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:05,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:05,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:05,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:06,852 INFO L124 PetriNetUnfolderBase]: 2433/3660 cut-off events. [2024-06-20 16:50:06,853 INFO L125 PetriNetUnfolderBase]: For 86320/86320 co-relation queries the response was YES. [2024-06-20 16:50:06,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25177 conditions, 3660 events. 2433/3660 cut-off events. For 86320/86320 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17409 event pairs, 586 based on Foata normal form. 4/3662 useless extension candidates. Maximal degree in co-relation 25120. Up to 3543 conditions per place. [2024-06-20 16:50:06,876 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 183 selfloop transitions, 22 changer transitions 0/208 dead transitions. [2024-06-20 16:50:06,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 208 transitions, 2485 flow [2024-06-20 16:50:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:50:06,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:50:06,877 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1901 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:50:06,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 208 transitions, 2485 flow [2024-06-20 16:50:06,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 208 transitions, 2318 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:06,965 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1839 flow [2024-06-20 16:50:06,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1839, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-20 16:50:06,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-20 16:50:06,966 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1839 flow [2024-06-20 16:50:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:06,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:06,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:06,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:50:06,966 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)] === [2024-06-20 16:50:06,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1129440280, now seen corresponding path program 2 times [2024-06-20 16:50:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063611648] [2024-06-20 16:50:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:10,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063611648] [2024-06-20 16:50:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063611648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:10,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141435134] [2024-06-20 16:50:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:10,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:10,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1839 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:10,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:10,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:10,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:11,444 INFO L124 PetriNetUnfolderBase]: 2423/3648 cut-off events. [2024-06-20 16:50:11,444 INFO L125 PetriNetUnfolderBase]: For 91248/91261 co-relation queries the response was YES. [2024-06-20 16:50:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25043 conditions, 3648 events. 2423/3648 cut-off events. For 91248/91261 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17371 event pairs, 570 based on Foata normal form. 14/3658 useless extension candidates. Maximal degree in co-relation 24985. Up to 3495 conditions per place. [2024-06-20 16:50:11,468 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-20 16:50:11,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2445 flow [2024-06-20 16:50:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:50:11,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:50:11,470 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1839 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:50:11,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2445 flow [2024-06-20 16:50:11,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 209 transitions, 2348 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 16:50:11,565 INFO L231 Difference]: Finished difference. Result has 128 places, 168 transitions, 1871 flow [2024-06-20 16:50:11,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1871, PETRI_PLACES=128, PETRI_TRANSITIONS=168} [2024-06-20 16:50:11,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-20 16:50:11,566 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 168 transitions, 1871 flow [2024-06-20 16:50:11,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:11,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:11,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:11,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:50:11,566 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)] === [2024-06-20 16:50:11,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:11,566 INFO L85 PathProgramCache]: Analyzing trace with hash -552882332, now seen corresponding path program 3 times [2024-06-20 16:50:11,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:11,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794277445] [2024-06-20 16:50:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:11,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:13,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794277445] [2024-06-20 16:50:13,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794277445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:13,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:13,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:13,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432750236] [2024-06-20 16:50:13,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:13,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:13,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:13,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 168 transitions, 1871 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:13,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:13,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:13,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:15,414 INFO L124 PetriNetUnfolderBase]: 2530/3804 cut-off events. [2024-06-20 16:50:15,414 INFO L125 PetriNetUnfolderBase]: For 101857/101870 co-relation queries the response was YES. [2024-06-20 16:50:15,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26615 conditions, 3804 events. 2530/3804 cut-off events. For 101857/101870 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18273 event pairs, 519 based on Foata normal form. 14/3814 useless extension candidates. Maximal degree in co-relation 26557. Up to 3119 conditions per place. [2024-06-20 16:50:15,441 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 138 selfloop transitions, 85 changer transitions 0/226 dead transitions. [2024-06-20 16:50:15,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 226 transitions, 2723 flow [2024-06-20 16:50:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:50:15,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:50:15,442 INFO L175 Difference]: Start difference. First operand has 128 places, 168 transitions, 1871 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:50:15,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 226 transitions, 2723 flow [2024-06-20 16:50:15,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 226 transitions, 2622 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:15,526 INFO L231 Difference]: Finished difference. Result has 131 places, 181 transitions, 2193 flow [2024-06-20 16:50:15,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2193, PETRI_PLACES=131, PETRI_TRANSITIONS=181} [2024-06-20 16:50:15,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 16:50:15,527 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 181 transitions, 2193 flow [2024-06-20 16:50:15,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:15,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:15,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:15,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:50:15,528 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)] === [2024-06-20 16:50:15,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2021185044, now seen corresponding path program 4 times [2024-06-20 16:50:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098907348] [2024-06-20 16:50:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098907348] [2024-06-20 16:50:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098907348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:17,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837367625] [2024-06-20 16:50:17,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:17,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:17,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:17,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 181 transitions, 2193 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:17,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:17,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:17,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:19,090 INFO L124 PetriNetUnfolderBase]: 2556/3842 cut-off events. [2024-06-20 16:50:19,090 INFO L125 PetriNetUnfolderBase]: For 112941/112954 co-relation queries the response was YES. [2024-06-20 16:50:19,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28804 conditions, 3842 events. 2556/3842 cut-off events. For 112941/112954 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18405 event pairs, 611 based on Foata normal form. 14/3852 useless extension candidates. Maximal degree in co-relation 28744. Up to 3335 conditions per place. [2024-06-20 16:50:19,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 142 selfloop transitions, 73 changer transitions 0/218 dead transitions. [2024-06-20 16:50:19,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 218 transitions, 2893 flow [2024-06-20 16:50:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:50:19,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 16:50:19,120 INFO L175 Difference]: Start difference. First operand has 131 places, 181 transitions, 2193 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:50:19,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 218 transitions, 2893 flow [2024-06-20 16:50:19,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 218 transitions, 2787 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:19,248 INFO L231 Difference]: Finished difference. Result has 134 places, 184 transitions, 2300 flow [2024-06-20 16:50:19,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2300, PETRI_PLACES=134, PETRI_TRANSITIONS=184} [2024-06-20 16:50:19,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-20 16:50:19,249 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 184 transitions, 2300 flow [2024-06-20 16:50:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:19,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:19,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:19,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:50:19,249 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)] === [2024-06-20 16:50:19,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158956, now seen corresponding path program 4 times [2024-06-20 16:50:19,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:19,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348493996] [2024-06-20 16:50:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:19,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348493996] [2024-06-20 16:50:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348493996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777006806] [2024-06-20 16:50:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:21,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:21,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 184 transitions, 2300 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:21,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:21,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:21,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:23,163 INFO L124 PetriNetUnfolderBase]: 2576/3874 cut-off events. [2024-06-20 16:50:23,163 INFO L125 PetriNetUnfolderBase]: For 120201/120205 co-relation queries the response was YES. [2024-06-20 16:50:23,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29494 conditions, 3874 events. 2576/3874 cut-off events. For 120201/120205 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18623 event pairs, 611 based on Foata normal form. 8/3880 useless extension candidates. Maximal degree in co-relation 29432. Up to 3666 conditions per place. [2024-06-20 16:50:23,193 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 40 changer transitions 0/226 dead transitions. [2024-06-20 16:50:23,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 226 transitions, 2910 flow [2024-06-20 16:50:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:50:23,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:50:23,194 INFO L175 Difference]: Start difference. First operand has 134 places, 184 transitions, 2300 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:50:23,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 226 transitions, 2910 flow [2024-06-20 16:50:23,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 226 transitions, 2720 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:23,313 INFO L231 Difference]: Finished difference. Result has 137 places, 186 transitions, 2247 flow [2024-06-20 16:50:23,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2247, PETRI_PLACES=137, PETRI_TRANSITIONS=186} [2024-06-20 16:50:23,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 16:50:23,314 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 186 transitions, 2247 flow [2024-06-20 16:50:23,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:23,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:23,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:50:23,314 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)] === [2024-06-20 16:50:23,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1014144460, now seen corresponding path program 5 times [2024-06-20 16:50:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:23,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375515754] [2024-06-20 16:50:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:25,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375515754] [2024-06-20 16:50:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375515754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844338664] [2024-06-20 16:50:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:25,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:25,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:25,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 186 transitions, 2247 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:25,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:25,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:25,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:27,257 INFO L124 PetriNetUnfolderBase]: 2566/3860 cut-off events. [2024-06-20 16:50:27,257 INFO L125 PetriNetUnfolderBase]: For 125304/125317 co-relation queries the response was YES. [2024-06-20 16:50:27,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29306 conditions, 3860 events. 2566/3860 cut-off events. For 125304/125317 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 18524 event pairs, 615 based on Foata normal form. 14/3870 useless extension candidates. Maximal degree in co-relation 29243. Up to 3477 conditions per place. [2024-06-20 16:50:27,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 62 changer transitions 0/217 dead transitions. [2024-06-20 16:50:27,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 217 transitions, 2773 flow [2024-06-20 16:50:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:50:27,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:50:27,290 INFO L175 Difference]: Start difference. First operand has 137 places, 186 transitions, 2247 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:50:27,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 217 transitions, 2773 flow [2024-06-20 16:50:27,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 2632 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:27,416 INFO L231 Difference]: Finished difference. Result has 138 places, 186 transitions, 2240 flow [2024-06-20 16:50:27,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2240, PETRI_PLACES=138, PETRI_TRANSITIONS=186} [2024-06-20 16:50:27,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 16:50:27,417 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 186 transitions, 2240 flow [2024-06-20 16:50:27,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:27,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:27,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:50:27,417 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)] === [2024-06-20 16:50:27,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1933602790, now seen corresponding path program 1 times [2024-06-20 16:50:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133674132] [2024-06-20 16:50:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:30,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:30,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133674132] [2024-06-20 16:50:30,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133674132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:30,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:30,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724677286] [2024-06-20 16:50:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:30,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:30,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:30,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:30,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 186 transitions, 2240 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:30,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:30,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:30,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:31,687 INFO L124 PetriNetUnfolderBase]: 2586/3892 cut-off events. [2024-06-20 16:50:31,688 INFO L125 PetriNetUnfolderBase]: For 132549/132562 co-relation queries the response was YES. [2024-06-20 16:50:31,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29694 conditions, 3892 events. 2586/3892 cut-off events. For 132549/132562 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18713 event pairs, 601 based on Foata normal form. 14/3902 useless extension candidates. Maximal degree in co-relation 29630. Up to 3666 conditions per place. [2024-06-20 16:50:31,718 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 39 changer transitions 0/214 dead transitions. [2024-06-20 16:50:31,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 214 transitions, 2792 flow [2024-06-20 16:50:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:50:31,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 16:50:31,719 INFO L175 Difference]: Start difference. First operand has 138 places, 186 transitions, 2240 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:50:31,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 214 transitions, 2792 flow [2024-06-20 16:50:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 214 transitions, 2633 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:31,838 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 2223 flow [2024-06-20 16:50:31,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2223, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2024-06-20 16:50:31,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 16:50:31,839 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 2223 flow [2024-06-20 16:50:31,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:31,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:31,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:31,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:50:31,839 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)] === [2024-06-20 16:50:31,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:31,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1942173670, now seen corresponding path program 2 times [2024-06-20 16:50:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:31,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537318804] [2024-06-20 16:50:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:34,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:34,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537318804] [2024-06-20 16:50:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537318804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:34,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335720118] [2024-06-20 16:50:34,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:34,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:34,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 2223 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:34,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:34,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:34,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:36,135 INFO L124 PetriNetUnfolderBase]: 2578/3880 cut-off events. [2024-06-20 16:50:36,135 INFO L125 PetriNetUnfolderBase]: For 138153/138166 co-relation queries the response was YES. [2024-06-20 16:50:36,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29708 conditions, 3880 events. 2578/3880 cut-off events. For 138153/138166 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18715 event pairs, 540 based on Foata normal form. 14/3890 useless extension candidates. Maximal degree in co-relation 29643. Up to 3582 conditions per place. [2024-06-20 16:50:36,171 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 175 selfloop transitions, 39 changer transitions 0/217 dead transitions. [2024-06-20 16:50:36,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 217 transitions, 2785 flow [2024-06-20 16:50:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:50:36,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-20 16:50:36,173 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 2223 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:50:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 217 transitions, 2785 flow [2024-06-20 16:50:36,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 217 transitions, 2669 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:36,314 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 2252 flow [2024-06-20 16:50:36,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2252, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-20 16:50:36,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-20 16:50:36,314 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 2252 flow [2024-06-20 16:50:36,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:36,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:36,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:50:36,315 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)] === [2024-06-20 16:50:36,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:36,315 INFO L85 PathProgramCache]: Analyzing trace with hash -237376552, now seen corresponding path program 5 times [2024-06-20 16:50:36,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:36,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882615455] [2024-06-20 16:50:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882615455] [2024-06-20 16:50:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882615455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:38,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969714481] [2024-06-20 16:50:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:38,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:38,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 2252 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:38,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:38,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:38,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:40,318 INFO L124 PetriNetUnfolderBase]: 2534/3812 cut-off events. [2024-06-20 16:50:40,318 INFO L125 PetriNetUnfolderBase]: For 143705/143718 co-relation queries the response was YES. [2024-06-20 16:50:40,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28892 conditions, 3812 events. 2534/3812 cut-off events. For 143705/143718 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18210 event pairs, 579 based on Foata normal form. 34/3842 useless extension candidates. Maximal degree in co-relation 28826. Up to 3343 conditions per place. [2024-06-20 16:50:40,347 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 184 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-20 16:50:40,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 241 transitions, 2922 flow [2024-06-20 16:50:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-20 16:50:40,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-20 16:50:40,349 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 2252 flow. Second operand 11 states and 178 transitions. [2024-06-20 16:50:40,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 241 transitions, 2922 flow [2024-06-20 16:50:40,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 241 transitions, 2795 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:40,531 INFO L231 Difference]: Finished difference. Result has 146 places, 190 transitions, 2241 flow [2024-06-20 16:50:40,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2241, PETRI_PLACES=146, PETRI_TRANSITIONS=190} [2024-06-20 16:50:40,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-20 16:50:40,532 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 190 transitions, 2241 flow [2024-06-20 16:50:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-06-20 16:50:40,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:40,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:40,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:50:40,532 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)] === [2024-06-20 16:50:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 667383887, now seen corresponding path program 1 times [2024-06-20 16:50:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723841626] [2024-06-20 16:50:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723841626] [2024-06-20 16:50:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723841626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:43,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:43,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:43,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551855233] [2024-06-20 16:50:43,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:43,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:43,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:43,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:43,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 190 transitions, 2241 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:43,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:43,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:43,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:44,854 INFO L124 PetriNetUnfolderBase]: 2726/4137 cut-off events. [2024-06-20 16:50:44,854 INFO L125 PetriNetUnfolderBase]: For 166196/166219 co-relation queries the response was YES. [2024-06-20 16:50:44,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31823 conditions, 4137 events. 2726/4137 cut-off events. For 166196/166219 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20666 event pairs, 549 based on Foata normal form. 32/4165 useless extension candidates. Maximal degree in co-relation 31756. Up to 2880 conditions per place. [2024-06-20 16:50:44,888 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 87 changer transitions 0/247 dead transitions. [2024-06-20 16:50:44,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 247 transitions, 3157 flow [2024-06-20 16:50:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:50:44,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 16:50:44,890 INFO L175 Difference]: Start difference. First operand has 146 places, 190 transitions, 2241 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:50:44,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 247 transitions, 3157 flow [2024-06-20 16:50:45,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 247 transitions, 2956 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-20 16:50:45,091 INFO L231 Difference]: Finished difference. Result has 143 places, 192 transitions, 2306 flow [2024-06-20 16:50:45,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2306, PETRI_PLACES=143, PETRI_TRANSITIONS=192} [2024-06-20 16:50:45,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-20 16:50:45,091 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 192 transitions, 2306 flow [2024-06-20 16:50:45,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:45,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:45,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:45,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:50:45,092 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:45,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 669261557, now seen corresponding path program 2 times [2024-06-20 16:50:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394113466] [2024-06-20 16:50:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:47,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:47,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394113466] [2024-06-20 16:50:47,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394113466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:47,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:47,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:47,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753622748] [2024-06-20 16:50:47,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:47,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:47,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 192 transitions, 2306 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:47,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:47,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:47,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:49,503 INFO L124 PetriNetUnfolderBase]: 2814/4280 cut-off events. [2024-06-20 16:50:49,503 INFO L125 PetriNetUnfolderBase]: For 177721/177734 co-relation queries the response was YES. [2024-06-20 16:50:49,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33024 conditions, 4280 events. 2814/4280 cut-off events. For 177721/177734 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 21504 event pairs, 660 based on Foata normal form. 30/4306 useless extension candidates. Maximal degree in co-relation 32958. Up to 4007 conditions per place. [2024-06-20 16:50:49,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 216 selfloop transitions, 23 changer transitions 0/242 dead transitions. [2024-06-20 16:50:49,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 242 transitions, 3014 flow [2024-06-20 16:50:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:50:49,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 16:50:49,541 INFO L175 Difference]: Start difference. First operand has 143 places, 192 transitions, 2306 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:50:49,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 242 transitions, 3014 flow [2024-06-20 16:50:49,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 242 transitions, 2882 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:49,756 INFO L231 Difference]: Finished difference. Result has 147 places, 193 transitions, 2273 flow [2024-06-20 16:50:49,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2273, PETRI_PLACES=147, PETRI_TRANSITIONS=193} [2024-06-20 16:50:49,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-20 16:50:49,756 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 193 transitions, 2273 flow [2024-06-20 16:50:49,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:49,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:49,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:49,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:50:49,757 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)] === [2024-06-20 16:50:49,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:49,757 INFO L85 PathProgramCache]: Analyzing trace with hash 669257837, now seen corresponding path program 3 times [2024-06-20 16:50:49,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:49,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116846799] [2024-06-20 16:50:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:49,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:52,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:52,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116846799] [2024-06-20 16:50:52,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116846799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:52,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:52,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:52,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319378813] [2024-06-20 16:50:52,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:52,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:52,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:52,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:52,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:52,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 193 transitions, 2273 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:52,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:52,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:52,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:53,909 INFO L124 PetriNetUnfolderBase]: 2882/4402 cut-off events. [2024-06-20 16:50:53,909 INFO L125 PetriNetUnfolderBase]: For 187341/187364 co-relation queries the response was YES. [2024-06-20 16:50:53,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33821 conditions, 4402 events. 2882/4402 cut-off events. For 187341/187364 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22518 event pairs, 689 based on Foata normal form. 32/4430 useless extension candidates. Maximal degree in co-relation 33753. Up to 3536 conditions per place. [2024-06-20 16:50:53,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 83 changer transitions 0/247 dead transitions. [2024-06-20 16:50:53,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 247 transitions, 3029 flow [2024-06-20 16:50:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:50:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:50:53,947 INFO L175 Difference]: Start difference. First operand has 147 places, 193 transitions, 2273 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:50:53,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 247 transitions, 3029 flow [2024-06-20 16:50:54,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 247 transitions, 2972 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:54,162 INFO L231 Difference]: Finished difference. Result has 149 places, 194 transitions, 2434 flow [2024-06-20 16:50:54,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2434, PETRI_PLACES=149, PETRI_TRANSITIONS=194} [2024-06-20 16:50:54,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-20 16:50:54,163 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 194 transitions, 2434 flow [2024-06-20 16:50:54,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:54,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:54,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:50:54,163 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)] === [2024-06-20 16:50:54,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1109638675, now seen corresponding path program 4 times [2024-06-20 16:50:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:54,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756113406] [2024-06-20 16:50:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756113406] [2024-06-20 16:50:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756113406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273078775] [2024-06-20 16:50:57,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:57,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:50:57,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 194 transitions, 2434 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:57,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:57,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:50:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:59,025 INFO L124 PetriNetUnfolderBase]: 3046/4677 cut-off events. [2024-06-20 16:50:59,025 INFO L125 PetriNetUnfolderBase]: For 211215/211238 co-relation queries the response was YES. [2024-06-20 16:50:59,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36694 conditions, 4677 events. 3046/4677 cut-off events. For 211215/211238 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24562 event pairs, 705 based on Foata normal form. 36/4709 useless extension candidates. Maximal degree in co-relation 36625. Up to 3920 conditions per place. [2024-06-20 16:50:59,062 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 58 changer transitions 0/249 dead transitions. [2024-06-20 16:50:59,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 249 transitions, 3386 flow [2024-06-20 16:50:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:50:59,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 16:50:59,064 INFO L175 Difference]: Start difference. First operand has 149 places, 194 transitions, 2434 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:50:59,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 249 transitions, 3386 flow [2024-06-20 16:50:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 249 transitions, 3198 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:59,355 INFO L231 Difference]: Finished difference. Result has 151 places, 196 transitions, 2458 flow [2024-06-20 16:50:59,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2458, PETRI_PLACES=151, PETRI_TRANSITIONS=196} [2024-06-20 16:50:59,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-20 16:50:59,356 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 196 transitions, 2458 flow [2024-06-20 16:50:59,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:59,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:59,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:50:59,356 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)] === [2024-06-20 16:50:59,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1109634955, now seen corresponding path program 5 times [2024-06-20 16:50:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776758645] [2024-06-20 16:50:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:02,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776758645] [2024-06-20 16:51:02,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776758645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:02,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:02,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:02,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001812049] [2024-06-20 16:51:02,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:02,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:02,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:02,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 196 transitions, 2458 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:02,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:02,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:02,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:04,761 INFO L124 PetriNetUnfolderBase]: 3002/4604 cut-off events. [2024-06-20 16:51:04,761 INFO L125 PetriNetUnfolderBase]: For 208570/208583 co-relation queries the response was YES. [2024-06-20 16:51:04,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35357 conditions, 4604 events. 3002/4604 cut-off events. For 208570/208583 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23964 event pairs, 694 based on Foata normal form. 34/4634 useless extension candidates. Maximal degree in co-relation 35287. Up to 4271 conditions per place. [2024-06-20 16:51:04,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 26 changer transitions 0/248 dead transitions. [2024-06-20 16:51:04,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 3160 flow [2024-06-20 16:51:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:51:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:51:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 16:51:04,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 16:51:04,796 INFO L175 Difference]: Start difference. First operand has 151 places, 196 transitions, 2458 flow. Second operand 10 states and 162 transitions. [2024-06-20 16:51:04,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 3160 flow [2024-06-20 16:51:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 248 transitions, 3056 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:05,053 INFO L231 Difference]: Finished difference. Result has 156 places, 196 transitions, 2414 flow [2024-06-20 16:51:05,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2414, PETRI_PLACES=156, PETRI_TRANSITIONS=196} [2024-06-20 16:51:05,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 16:51:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 196 transitions, 2414 flow [2024-06-20 16:51:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:05,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:05,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:51:05,055 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)] === [2024-06-20 16:51:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1762049365, now seen corresponding path program 1 times [2024-06-20 16:51:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467691573] [2024-06-20 16:51:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:08,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:08,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467691573] [2024-06-20 16:51:08,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467691573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:08,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:08,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:08,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194495131] [2024-06-20 16:51:08,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:08,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:08,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:08,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:08,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:08,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:08,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 196 transitions, 2414 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:08,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:08,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:08,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:09,519 INFO L124 PetriNetUnfolderBase]: 3022/4636 cut-off events. [2024-06-20 16:51:09,519 INFO L125 PetriNetUnfolderBase]: For 200276/200289 co-relation queries the response was YES. [2024-06-20 16:51:09,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35568 conditions, 4636 events. 3022/4636 cut-off events. For 200276/200289 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24180 event pairs, 620 based on Foata normal form. 14/4646 useless extension candidates. Maximal degree in co-relation 35496. Up to 4364 conditions per place. [2024-06-20 16:51:09,556 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 45 changer transitions 0/230 dead transitions. [2024-06-20 16:51:09,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 230 transitions, 2998 flow [2024-06-20 16:51:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:51:09,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:51:09,558 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 2414 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:51:09,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 230 transitions, 2998 flow [2024-06-20 16:51:09,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 230 transitions, 2941 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:51:09,808 INFO L231 Difference]: Finished difference. Result has 155 places, 198 transitions, 2496 flow [2024-06-20 16:51:09,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2496, PETRI_PLACES=155, PETRI_TRANSITIONS=198} [2024-06-20 16:51:09,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-20 16:51:09,808 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 198 transitions, 2496 flow [2024-06-20 16:51:09,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:09,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:09,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:09,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:51:09,809 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)] === [2024-06-20 16:51:09,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:09,809 INFO L85 PathProgramCache]: Analyzing trace with hash 40726633, now seen corresponding path program 2 times [2024-06-20 16:51:09,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:09,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198252457] [2024-06-20 16:51:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198252457] [2024-06-20 16:51:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198252457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:12,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591322314] [2024-06-20 16:51:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:12,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:12,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 198 transitions, 2496 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:12,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:12,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:12,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:14,101 INFO L124 PetriNetUnfolderBase]: 3014/4624 cut-off events. [2024-06-20 16:51:14,102 INFO L125 PetriNetUnfolderBase]: For 206938/206951 co-relation queries the response was YES. [2024-06-20 16:51:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35772 conditions, 4624 events. 3014/4624 cut-off events. For 206938/206951 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24154 event pairs, 707 based on Foata normal form. 14/4634 useless extension candidates. Maximal degree in co-relation 35699. Up to 4363 conditions per place. [2024-06-20 16:51:14,134 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-20 16:51:14,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 230 transitions, 3055 flow [2024-06-20 16:51:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:51:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:51:14,136 INFO L175 Difference]: Start difference. First operand has 155 places, 198 transitions, 2496 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:51:14,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 230 transitions, 3055 flow [2024-06-20 16:51:14,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 230 transitions, 2946 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:14,370 INFO L231 Difference]: Finished difference. Result has 157 places, 199 transitions, 2512 flow [2024-06-20 16:51:14,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2512, PETRI_PLACES=157, PETRI_TRANSITIONS=199} [2024-06-20 16:51:14,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 16:51:14,370 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 199 transitions, 2512 flow [2024-06-20 16:51:14,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:14,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:14,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:51:14,371 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)] === [2024-06-20 16:51:14,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 35012341, now seen corresponding path program 6 times [2024-06-20 16:51:14,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:14,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426872172] [2024-06-20 16:51:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:16,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426872172] [2024-06-20 16:51:16,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426872172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:16,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:16,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118233712] [2024-06-20 16:51:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:16,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:16,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 199 transitions, 2512 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:16,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:16,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:16,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:18,376 INFO L124 PetriNetUnfolderBase]: 3102/4772 cut-off events. [2024-06-20 16:51:18,376 INFO L125 PetriNetUnfolderBase]: For 233256/233269 co-relation queries the response was YES. [2024-06-20 16:51:18,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 4772 events. 3102/4772 cut-off events. For 233256/233269 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25237 event pairs, 729 based on Foata normal form. 30/4798 useless extension candidates. Maximal degree in co-relation 36930. Up to 4125 conditions per place. [2024-06-20 16:51:18,416 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 74 changer transitions 0/242 dead transitions. [2024-06-20 16:51:18,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 242 transitions, 3208 flow [2024-06-20 16:51:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:51:18,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:51:18,417 INFO L175 Difference]: Start difference. First operand has 157 places, 199 transitions, 2512 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:51:18,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 242 transitions, 3208 flow [2024-06-20 16:51:18,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 242 transitions, 3070 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:18,689 INFO L231 Difference]: Finished difference. Result has 160 places, 200 transitions, 2577 flow [2024-06-20 16:51:18,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2577, PETRI_PLACES=160, PETRI_TRANSITIONS=200} [2024-06-20 16:51:18,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 16:51:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 200 transitions, 2577 flow [2024-06-20 16:51:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:18,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:18,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:51:18,691 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)] === [2024-06-20 16:51:18,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 40518871, now seen corresponding path program 7 times [2024-06-20 16:51:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449790980] [2024-06-20 16:51:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:21,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:21,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449790980] [2024-06-20 16:51:21,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449790980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:21,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:21,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641211959] [2024-06-20 16:51:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:21,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:21,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:21,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:21,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:21,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:21,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 200 transitions, 2577 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:21,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:21,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:21,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:22,806 INFO L124 PetriNetUnfolderBase]: 3190/4919 cut-off events. [2024-06-20 16:51:22,806 INFO L125 PetriNetUnfolderBase]: For 249242/249255 co-relation queries the response was YES. [2024-06-20 16:51:22,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38377 conditions, 4919 events. 3190/4919 cut-off events. For 249242/249255 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26315 event pairs, 771 based on Foata normal form. 30/4945 useless extension candidates. Maximal degree in co-relation 38302. Up to 4507 conditions per place. [2024-06-20 16:51:22,847 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 195 selfloop transitions, 54 changer transitions 0/252 dead transitions. [2024-06-20 16:51:22,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 252 transitions, 3315 flow [2024-06-20 16:51:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:51:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:51:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-20 16:51:22,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 16:51:22,850 INFO L175 Difference]: Start difference. First operand has 160 places, 200 transitions, 2577 flow. Second operand 11 states and 175 transitions. [2024-06-20 16:51:22,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 252 transitions, 3315 flow [2024-06-20 16:51:23,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 252 transitions, 3152 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:51:23,160 INFO L231 Difference]: Finished difference. Result has 164 places, 201 transitions, 2579 flow [2024-06-20 16:51:23,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2579, PETRI_PLACES=164, PETRI_TRANSITIONS=201} [2024-06-20 16:51:23,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 16:51:23,161 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 201 transitions, 2579 flow [2024-06-20 16:51:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:23,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:23,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:23,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:51:23,162 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)] === [2024-06-20 16:51:23,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1830431831, now seen corresponding path program 8 times [2024-06-20 16:51:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373559038] [2024-06-20 16:51:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:25,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:25,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373559038] [2024-06-20 16:51:25,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373559038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:25,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:25,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:25,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560509802] [2024-06-20 16:51:25,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:25,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:25,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:25,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 201 transitions, 2579 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:25,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:25,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:25,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:27,321 INFO L124 PetriNetUnfolderBase]: 3250/5024 cut-off events. [2024-06-20 16:51:27,321 INFO L125 PetriNetUnfolderBase]: For 258144/258157 co-relation queries the response was YES. [2024-06-20 16:51:27,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38944 conditions, 5024 events. 3250/5024 cut-off events. For 258144/258157 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 27096 event pairs, 769 based on Foata normal form. 30/5050 useless extension candidates. Maximal degree in co-relation 38868. Up to 4495 conditions per place. [2024-06-20 16:51:27,358 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 65 changer transitions 0/249 dead transitions. [2024-06-20 16:51:27,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 249 transitions, 3303 flow [2024-06-20 16:51:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:51:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:51:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 16:51:27,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 16:51:27,359 INFO L175 Difference]: Start difference. First operand has 164 places, 201 transitions, 2579 flow. Second operand 10 states and 162 transitions. [2024-06-20 16:51:27,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 249 transitions, 3303 flow [2024-06-20 16:51:27,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 249 transitions, 3169 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 16:51:27,651 INFO L231 Difference]: Finished difference. Result has 165 places, 202 transitions, 2634 flow [2024-06-20 16:51:27,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2634, PETRI_PLACES=165, PETRI_TRANSITIONS=202} [2024-06-20 16:51:27,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-20 16:51:27,652 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 202 transitions, 2634 flow [2024-06-20 16:51:27,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:27,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:27,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:27,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:51:27,652 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:27,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:27,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1830579701, now seen corresponding path program 9 times [2024-06-20 16:51:27,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:27,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076712810] [2024-06-20 16:51:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:27,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:30,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:30,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076712810] [2024-06-20 16:51:30,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076712810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:30,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:30,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924995911] [2024-06-20 16:51:30,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:30,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:30,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:30,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:30,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 202 transitions, 2634 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:30,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:30,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:30,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:31,837 INFO L124 PetriNetUnfolderBase]: 3222/4980 cut-off events. [2024-06-20 16:51:31,837 INFO L125 PetriNetUnfolderBase]: For 249497/249510 co-relation queries the response was YES. [2024-06-20 16:51:31,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38102 conditions, 4980 events. 3222/4980 cut-off events. For 249497/249510 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26686 event pairs, 717 based on Foata normal form. 26/5002 useless extension candidates. Maximal degree in co-relation 38025. Up to 3727 conditions per place. [2024-06-20 16:51:31,878 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 79 changer transitions 0/247 dead transitions. [2024-06-20 16:51:31,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 247 transitions, 3318 flow [2024-06-20 16:51:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:51:31,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 16:51:31,880 INFO L175 Difference]: Start difference. First operand has 165 places, 202 transitions, 2634 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:51:31,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 247 transitions, 3318 flow [2024-06-20 16:51:32,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 247 transitions, 3159 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:51:32,216 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 2640 flow [2024-06-20 16:51:32,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2640, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2024-06-20 16:51:32,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 16:51:32,217 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 2640 flow [2024-06-20 16:51:32,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:32,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:32,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:32,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:51:32,217 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:32,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1830425879, now seen corresponding path program 3 times [2024-06-20 16:51:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:32,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535966396] [2024-06-20 16:51:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:34,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535966396] [2024-06-20 16:51:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535966396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:34,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064402928] [2024-06-20 16:51:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:35,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:35,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 2640 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:35,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:35,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:36,504 INFO L124 PetriNetUnfolderBase]: 3242/5012 cut-off events. [2024-06-20 16:51:36,504 INFO L125 PetriNetUnfolderBase]: For 246033/246046 co-relation queries the response was YES. [2024-06-20 16:51:36,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38454 conditions, 5012 events. 3242/5012 cut-off events. For 246033/246046 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27097 event pairs, 761 based on Foata normal form. 14/5022 useless extension candidates. Maximal degree in co-relation 38376. Up to 4641 conditions per place. [2024-06-20 16:51:36,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 61 changer transitions 0/235 dead transitions. [2024-06-20 16:51:36,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 235 transitions, 3254 flow [2024-06-20 16:51:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:51:36,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:51:36,541 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 2640 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:51:36,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 235 transitions, 3254 flow [2024-06-20 16:51:36,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 235 transitions, 3053 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:51:36,824 INFO L231 Difference]: Finished difference. Result has 166 places, 204 transitions, 2632 flow [2024-06-20 16:51:36,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2632, PETRI_PLACES=166, PETRI_TRANSITIONS=204} [2024-06-20 16:51:36,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 16:51:36,824 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 204 transitions, 2632 flow [2024-06-20 16:51:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:36,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:36,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:36,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:51:36,825 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)] === [2024-06-20 16:51:36,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:36,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2026867267, now seen corresponding path program 1 times [2024-06-20 16:51:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:36,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010797824] [2024-06-20 16:51:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:38,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010797824] [2024-06-20 16:51:38,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010797824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:38,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:38,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:51:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151605546] [2024-06-20 16:51:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:38,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:51:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:51:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:51:38,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:38,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 204 transitions, 2632 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:38,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:38,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:38,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:39,602 INFO L124 PetriNetUnfolderBase]: 3247/5017 cut-off events. [2024-06-20 16:51:39,603 INFO L125 PetriNetUnfolderBase]: For 249566/249566 co-relation queries the response was YES. [2024-06-20 16:51:39,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38412 conditions, 5017 events. 3247/5017 cut-off events. For 249566/249566 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27180 event pairs, 753 based on Foata normal form. 1/5016 useless extension candidates. Maximal degree in co-relation 38333. Up to 4959 conditions per place. [2024-06-20 16:51:39,647 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 19 changer transitions 0/233 dead transitions. [2024-06-20 16:51:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 233 transitions, 3332 flow [2024-06-20 16:51:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:51:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:51:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 16:51:39,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-20 16:51:39,648 INFO L175 Difference]: Start difference. First operand has 166 places, 204 transitions, 2632 flow. Second operand 6 states and 97 transitions. [2024-06-20 16:51:39,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 233 transitions, 3332 flow [2024-06-20 16:51:40,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 233 transitions, 3157 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:40,053 INFO L231 Difference]: Finished difference. Result has 167 places, 213 transitions, 2614 flow [2024-06-20 16:51:40,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2614, PETRI_PLACES=167, PETRI_TRANSITIONS=213} [2024-06-20 16:51:40,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-20 16:51:40,053 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 213 transitions, 2614 flow [2024-06-20 16:51:40,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:40,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:40,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:40,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:51:40,054 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:40,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 68639333, now seen corresponding path program 4 times [2024-06-20 16:51:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023318667] [2024-06-20 16:51:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:40,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:43,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023318667] [2024-06-20 16:51:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023318667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:43,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:43,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:43,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970965903] [2024-06-20 16:51:43,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:43,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:43,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:43,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:43,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:43,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 213 transitions, 2614 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:43,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:43,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:43,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:44,643 INFO L124 PetriNetUnfolderBase]: 3239/5007 cut-off events. [2024-06-20 16:51:44,643 INFO L125 PetriNetUnfolderBase]: For 257821/257837 co-relation queries the response was YES. [2024-06-20 16:51:44,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38288 conditions, 5007 events. 3239/5007 cut-off events. For 257821/257837 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27000 event pairs, 757 based on Foata normal form. 16/5019 useless extension candidates. Maximal degree in co-relation 38207. Up to 4723 conditions per place. [2024-06-20 16:51:44,686 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2024-06-20 16:51:44,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 246 transitions, 3256 flow [2024-06-20 16:51:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:51:44,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:51:44,687 INFO L175 Difference]: Start difference. First operand has 167 places, 213 transitions, 2614 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:51:44,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 246 transitions, 3256 flow [2024-06-20 16:51:45,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 246 transitions, 3218 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-20 16:51:45,054 INFO L231 Difference]: Finished difference. Result has 174 places, 215 transitions, 2748 flow [2024-06-20 16:51:45,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2748, PETRI_PLACES=174, PETRI_TRANSITIONS=215} [2024-06-20 16:51:45,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 16:51:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 215 transitions, 2748 flow [2024-06-20 16:51:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:45,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:45,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:51:45,055 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)] === [2024-06-20 16:51:45,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 68646773, now seen corresponding path program 5 times [2024-06-20 16:51:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940254418] [2024-06-20 16:51:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:47,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:47,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940254418] [2024-06-20 16:51:47,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940254418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:47,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:47,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:47,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710002726] [2024-06-20 16:51:47,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:47,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:47,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:47,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 215 transitions, 2748 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:47,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:47,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:47,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:49,473 INFO L124 PetriNetUnfolderBase]: 3259/5039 cut-off events. [2024-06-20 16:51:49,473 INFO L125 PetriNetUnfolderBase]: For 269776/269792 co-relation queries the response was YES. [2024-06-20 16:51:49,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39085 conditions, 5039 events. 3259/5039 cut-off events. For 269776/269792 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27249 event pairs, 757 based on Foata normal form. 16/5051 useless extension candidates. Maximal degree in co-relation 39001. Up to 4785 conditions per place. [2024-06-20 16:51:49,523 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 41 changer transitions 0/249 dead transitions. [2024-06-20 16:51:49,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 249 transitions, 3376 flow [2024-06-20 16:51:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:51:49,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:51:49,524 INFO L175 Difference]: Start difference. First operand has 174 places, 215 transitions, 2748 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:51:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 249 transitions, 3376 flow [2024-06-20 16:51:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 249 transitions, 3224 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:49,882 INFO L231 Difference]: Finished difference. Result has 176 places, 217 transitions, 2731 flow [2024-06-20 16:51:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2731, PETRI_PLACES=176, PETRI_TRANSITIONS=217} [2024-06-20 16:51:49,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-20 16:51:49,882 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 217 transitions, 2731 flow [2024-06-20 16:51:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:49,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:49,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:49,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:51:49,883 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)] === [2024-06-20 16:51:49,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash -180444427, now seen corresponding path program 6 times [2024-06-20 16:51:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:49,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57486972] [2024-06-20 16:51:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57486972] [2024-06-20 16:51:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57486972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:52,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:52,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556646231] [2024-06-20 16:51:52,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:52,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:52,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:52,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:52,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 217 transitions, 2731 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:52,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:52,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:52,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:53,912 INFO L124 PetriNetUnfolderBase]: 3251/5027 cut-off events. [2024-06-20 16:51:53,913 INFO L125 PetriNetUnfolderBase]: For 275323/275339 co-relation queries the response was YES. [2024-06-20 16:51:53,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38971 conditions, 5027 events. 3251/5027 cut-off events. For 275323/275339 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27069 event pairs, 668 based on Foata normal form. 16/5039 useless extension candidates. Maximal degree in co-relation 38886. Up to 4701 conditions per place. [2024-06-20 16:51:53,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 41 changer transitions 0/251 dead transitions. [2024-06-20 16:51:53,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 3341 flow [2024-06-20 16:51:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:51:53,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:51:53,962 INFO L175 Difference]: Start difference. First operand has 176 places, 217 transitions, 2731 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:51:53,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 3341 flow [2024-06-20 16:51:54,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 251 transitions, 3236 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:54,366 INFO L231 Difference]: Finished difference. Result has 178 places, 218 transitions, 2737 flow [2024-06-20 16:51:54,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2737, PETRI_PLACES=178, PETRI_TRANSITIONS=218} [2024-06-20 16:51:54,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 16:51:54,367 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 218 transitions, 2737 flow [2024-06-20 16:51:54,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:54,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:54,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:51:54,367 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:54,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -346975237, now seen corresponding path program 2 times [2024-06-20 16:51:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225761132] [2024-06-20 16:51:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225761132] [2024-06-20 16:51:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225761132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:51:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859068538] [2024-06-20 16:51:55,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:51:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:51:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:51:55,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:55,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 218 transitions, 2737 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:55,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:55,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:55,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:57,293 INFO L124 PetriNetUnfolderBase]: 3258/5035 cut-off events. [2024-06-20 16:51:57,293 INFO L125 PetriNetUnfolderBase]: For 283954/283954 co-relation queries the response was YES. [2024-06-20 16:51:57,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39269 conditions, 5035 events. 3258/5035 cut-off events. For 283954/283954 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27260 event pairs, 757 based on Foata normal form. 3/5036 useless extension candidates. Maximal degree in co-relation 39183. Up to 4969 conditions per place. [2024-06-20 16:51:57,332 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 21 changer transitions 0/241 dead transitions. [2024-06-20 16:51:57,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3325 flow [2024-06-20 16:51:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:51:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:51:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 16:51:57,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:51:57,334 INFO L175 Difference]: Start difference. First operand has 178 places, 218 transitions, 2737 flow. Second operand 5 states and 90 transitions. [2024-06-20 16:51:57,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3325 flow [2024-06-20 16:51:57,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 3202 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:57,797 INFO L231 Difference]: Finished difference. Result has 177 places, 221 transitions, 2725 flow [2024-06-20 16:51:57,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2725, PETRI_PLACES=177, PETRI_TRANSITIONS=221} [2024-06-20 16:51:57,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 16:51:57,797 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 221 transitions, 2725 flow [2024-06-20 16:51:57,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:57,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:57,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:51:57,798 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:57,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:57,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2118195668, now seen corresponding path program 1 times [2024-06-20 16:51:57,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:57,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374823187] [2024-06-20 16:51:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:59,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:59,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374823187] [2024-06-20 16:51:59,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374823187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:59,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:59,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:51:59,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777473005] [2024-06-20 16:51:59,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:59,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:51:59,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:51:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:51:59,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:51:59,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 221 transitions, 2725 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:59,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:59,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:51:59,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:00,808 INFO L124 PetriNetUnfolderBase]: 3255/5031 cut-off events. [2024-06-20 16:52:00,808 INFO L125 PetriNetUnfolderBase]: For 288374/288374 co-relation queries the response was YES. [2024-06-20 16:52:00,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39468 conditions, 5031 events. 3255/5031 cut-off events. For 288374/288374 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 27246 event pairs, 756 based on Foata normal form. 1/5030 useless extension candidates. Maximal degree in co-relation 39381. Up to 4938 conditions per place. [2024-06-20 16:52:00,854 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 227 selfloop transitions, 26 changer transitions 0/256 dead transitions. [2024-06-20 16:52:00,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 256 transitions, 3503 flow [2024-06-20 16:52:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:52:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:52:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:52:00,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:52:00,855 INFO L175 Difference]: Start difference. First operand has 177 places, 221 transitions, 2725 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:52:00,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 256 transitions, 3503 flow [2024-06-20 16:52:01,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 3458 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:52:01,287 INFO L231 Difference]: Finished difference. Result has 182 places, 227 transitions, 2852 flow [2024-06-20 16:52:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2852, PETRI_PLACES=182, PETRI_TRANSITIONS=227} [2024-06-20 16:52:01,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 16:52:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 227 transitions, 2852 flow [2024-06-20 16:52:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:01,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:52:01,289 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)] === [2024-06-20 16:52:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash 537718471, now seen corresponding path program 1 times [2024-06-20 16:52:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482716045] [2024-06-20 16:52:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482716045] [2024-06-20 16:52:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482716045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:04,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:52:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217823494] [2024-06-20 16:52:04,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:52:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:52:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:52:04,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:04,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 227 transitions, 2852 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:04,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:04,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:04,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:06,468 INFO L124 PetriNetUnfolderBase]: 3303/5117 cut-off events. [2024-06-20 16:52:06,469 INFO L125 PetriNetUnfolderBase]: For 313896/313916 co-relation queries the response was YES. [2024-06-20 16:52:06,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40665 conditions, 5117 events. 3303/5117 cut-off events. For 313896/313916 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 27841 event pairs, 699 based on Foata normal form. 26/5139 useless extension candidates. Maximal degree in co-relation 40576. Up to 4761 conditions per place. [2024-06-20 16:52:06,520 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 46 changer transitions 0/268 dead transitions. [2024-06-20 16:52:06,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 268 transitions, 3558 flow [2024-06-20 16:52:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:52:06,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:52:06,522 INFO L175 Difference]: Start difference. First operand has 182 places, 227 transitions, 2852 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:52:06,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 268 transitions, 3558 flow [2024-06-20 16:52:07,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 268 transitions, 3480 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:52:07,175 INFO L231 Difference]: Finished difference. Result has 187 places, 228 transitions, 2924 flow [2024-06-20 16:52:07,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2924, PETRI_PLACES=187, PETRI_TRANSITIONS=228} [2024-06-20 16:52:07,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 16:52:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 228 transitions, 2924 flow [2024-06-20 16:52:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:07,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:07,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:07,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:52:07,176 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:07,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash -736135563, now seen corresponding path program 2 times [2024-06-20 16:52:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392836509] [2024-06-20 16:52:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:10,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:10,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392836509] [2024-06-20 16:52:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392836509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:10,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800804455] [2024-06-20 16:52:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:10,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:10,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 228 transitions, 2924 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-20 16:52:10,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:10,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:10,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:11,923 INFO L124 PetriNetUnfolderBase]: 3351/5201 cut-off events. [2024-06-20 16:52:11,924 INFO L125 PetriNetUnfolderBase]: For 329302/329322 co-relation queries the response was YES. [2024-06-20 16:52:11,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41627 conditions, 5201 events. 3351/5201 cut-off events. For 329302/329322 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28615 event pairs, 780 based on Foata normal form. 26/5223 useless extension candidates. Maximal degree in co-relation 41537. Up to 4856 conditions per place. [2024-06-20 16:52:11,967 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 53 changer transitions 0/278 dead transitions. [2024-06-20 16:52:11,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 278 transitions, 3680 flow [2024-06-20 16:52:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:52:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:52:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-20 16:52:11,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-20 16:52:11,969 INFO L175 Difference]: Start difference. First operand has 187 places, 228 transitions, 2924 flow. Second operand 11 states and 172 transitions. [2024-06-20 16:52:11,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 278 transitions, 3680 flow [2024-06-20 16:52:12,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 278 transitions, 3556 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:12,510 INFO L231 Difference]: Finished difference. Result has 191 places, 229 transitions, 2966 flow [2024-06-20 16:52:12,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2966, PETRI_PLACES=191, PETRI_TRANSITIONS=229} [2024-06-20 16:52:12,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:52:12,510 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 229 transitions, 2966 flow [2024-06-20 16:52:12,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2024-06-20 16:52:12,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:12,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:52:12,511 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:12,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1038325951, now seen corresponding path program 3 times [2024-06-20 16:52:12,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:12,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653878158] [2024-06-20 16:52:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:15,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:15,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653878158] [2024-06-20 16:52:15,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653878158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:15,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:15,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:52:15,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545318429] [2024-06-20 16:52:15,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:15,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:52:15,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:52:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:52:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:15,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 229 transitions, 2966 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:15,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:15,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:15,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:17,541 INFO L124 PetriNetUnfolderBase]: 3399/5285 cut-off events. [2024-06-20 16:52:17,541 INFO L125 PetriNetUnfolderBase]: For 342205/342225 co-relation queries the response was YES. [2024-06-20 16:52:17,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42295 conditions, 5285 events. 3399/5285 cut-off events. For 342205/342225 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 29271 event pairs, 814 based on Foata normal form. 26/5307 useless extension candidates. Maximal degree in co-relation 42204. Up to 4830 conditions per place. [2024-06-20 16:52:17,591 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 62 changer transitions 0/269 dead transitions. [2024-06-20 16:52:17,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 269 transitions, 3676 flow [2024-06-20 16:52:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:52:17,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:52:17,593 INFO L175 Difference]: Start difference. First operand has 191 places, 229 transitions, 2966 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:52:17,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 269 transitions, 3676 flow [2024-06-20 16:52:18,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 269 transitions, 3536 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-20 16:52:18,137 INFO L231 Difference]: Finished difference. Result has 191 places, 230 transitions, 3012 flow [2024-06-20 16:52:18,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3012, PETRI_PLACES=191, PETRI_TRANSITIONS=230} [2024-06-20 16:52:18,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:52:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 230 transitions, 3012 flow [2024-06-20 16:52:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:18,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:18,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:52:18,138 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)] === [2024-06-20 16:52:18,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1616646584, now seen corresponding path program 1 times [2024-06-20 16:52:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:18,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963541932] [2024-06-20 16:52:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:19,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963541932] [2024-06-20 16:52:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963541932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:19,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729703901] [2024-06-20 16:52:19,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:19,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:19,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:19,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:19,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 230 transitions, 3012 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:19,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:19,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:19,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:21,634 INFO L124 PetriNetUnfolderBase]: 3409/5297 cut-off events. [2024-06-20 16:52:21,635 INFO L125 PetriNetUnfolderBase]: For 337483/337483 co-relation queries the response was YES. [2024-06-20 16:52:21,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42483 conditions, 5297 events. 3409/5297 cut-off events. For 337483/337483 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 29294 event pairs, 823 based on Foata normal form. 2/5297 useless extension candidates. Maximal degree in co-relation 42391. Up to 5211 conditions per place. [2024-06-20 16:52:21,678 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 228 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-20 16:52:21,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 260 transitions, 3816 flow [2024-06-20 16:52:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:52:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:52:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 16:52:21,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:52:21,680 INFO L175 Difference]: Start difference. First operand has 191 places, 230 transitions, 3012 flow. Second operand 7 states and 112 transitions. [2024-06-20 16:52:21,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 260 transitions, 3816 flow [2024-06-20 16:52:22,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 260 transitions, 3656 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:22,315 INFO L231 Difference]: Finished difference. Result has 191 places, 236 transitions, 3030 flow [2024-06-20 16:52:22,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3030, PETRI_PLACES=191, PETRI_TRANSITIONS=236} [2024-06-20 16:52:22,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:52:22,315 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 236 transitions, 3030 flow [2024-06-20 16:52:22,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:22,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:22,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:22,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:52:22,316 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)] === [2024-06-20 16:52:22,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2118494198, now seen corresponding path program 2 times [2024-06-20 16:52:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749375619] [2024-06-20 16:52:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749375619] [2024-06-20 16:52:23,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749375619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:23,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:23,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:23,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777861272] [2024-06-20 16:52:23,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:23,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:23,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:23,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 236 transitions, 3030 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:23,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:23,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:23,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:25,506 INFO L124 PetriNetUnfolderBase]: 3414/5304 cut-off events. [2024-06-20 16:52:25,507 INFO L125 PetriNetUnfolderBase]: For 344600/344600 co-relation queries the response was YES. [2024-06-20 16:52:25,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42609 conditions, 5304 events. 3414/5304 cut-off events. For 344600/344600 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29375 event pairs, 823 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 42516. Up to 5244 conditions per place. [2024-06-20 16:52:25,562 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 22 changer transitions 0/259 dead transitions. [2024-06-20 16:52:25,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 259 transitions, 3652 flow [2024-06-20 16:52:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:52:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:52:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-20 16:52:25,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-20 16:52:25,564 INFO L175 Difference]: Start difference. First operand has 191 places, 236 transitions, 3030 flow. Second operand 7 states and 106 transitions. [2024-06-20 16:52:25,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 259 transitions, 3652 flow [2024-06-20 16:52:26,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 259 transitions, 3601 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:52:26,256 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 3087 flow [2024-06-20 16:52:26,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3087, PETRI_PLACES=195, PETRI_TRANSITIONS=239} [2024-06-20 16:52:26,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 16:52:26,257 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 3087 flow [2024-06-20 16:52:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:26,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:26,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:52:26,258 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:26,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1534983353, now seen corresponding path program 4 times [2024-06-20 16:52:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339850102] [2024-06-20 16:52:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:26,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:30,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339850102] [2024-06-20 16:52:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339850102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:30,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:30,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:52:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477363775] [2024-06-20 16:52:30,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:30,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:52:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:52:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:52:30,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:30,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 239 transitions, 3087 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:30,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:30,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:30,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:32,153 INFO L124 PetriNetUnfolderBase]: 3462/5390 cut-off events. [2024-06-20 16:52:32,154 INFO L125 PetriNetUnfolderBase]: For 374364/374387 co-relation queries the response was YES. [2024-06-20 16:52:32,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43441 conditions, 5390 events. 3462/5390 cut-off events. For 374364/374387 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30008 event pairs, 817 based on Foata normal form. 28/5414 useless extension candidates. Maximal degree in co-relation 43346. Up to 4809 conditions per place. [2024-06-20 16:52:32,211 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 55 changer transitions 0/295 dead transitions. [2024-06-20 16:52:32,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 295 transitions, 3941 flow [2024-06-20 16:52:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:52:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:52:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-20 16:52:32,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-20 16:52:32,212 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 3087 flow. Second operand 11 states and 180 transitions. [2024-06-20 16:52:32,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 295 transitions, 3941 flow [2024-06-20 16:52:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 295 transitions, 3879 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:32,828 INFO L231 Difference]: Finished difference. Result has 201 places, 240 transitions, 3199 flow [2024-06-20 16:52:32,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3199, PETRI_PLACES=201, PETRI_TRANSITIONS=240} [2024-06-20 16:52:32,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 16:52:32,828 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 240 transitions, 3199 flow [2024-06-20 16:52:32,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:32,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:32,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:52:32,829 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:32,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1409110783, now seen corresponding path program 5 times [2024-06-20 16:52:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:32,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606106934] [2024-06-20 16:52:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:32,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:36,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606106934] [2024-06-20 16:52:36,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606106934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:36,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:36,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:52:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757083225] [2024-06-20 16:52:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:36,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:52:36,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:52:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:52:36,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 240 transitions, 3199 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:36,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:36,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:36,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:38,035 INFO L124 PetriNetUnfolderBase]: 3510/5474 cut-off events. [2024-06-20 16:52:38,036 INFO L125 PetriNetUnfolderBase]: For 391779/391802 co-relation queries the response was YES. [2024-06-20 16:52:38,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44533 conditions, 5474 events. 3510/5474 cut-off events. For 391779/391802 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30725 event pairs, 825 based on Foata normal form. 28/5498 useless extension candidates. Maximal degree in co-relation 44437. Up to 5136 conditions per place. [2024-06-20 16:52:38,094 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 244 selfloop transitions, 44 changer transitions 0/291 dead transitions. [2024-06-20 16:52:38,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 3991 flow [2024-06-20 16:52:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:52:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:52:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-20 16:52:38,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-20 16:52:38,096 INFO L175 Difference]: Start difference. First operand has 201 places, 240 transitions, 3199 flow. Second operand 11 states and 171 transitions. [2024-06-20 16:52:38,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 3991 flow [2024-06-20 16:52:38,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 291 transitions, 3843 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 16:52:38,703 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 3205 flow [2024-06-20 16:52:38,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3205, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-20 16:52:38,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 16:52:38,704 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 3205 flow [2024-06-20 16:52:38,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:38,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:38,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:52:38,704 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:38,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1881815515, now seen corresponding path program 6 times [2024-06-20 16:52:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477498145] [2024-06-20 16:52:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:38,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:42,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:42,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477498145] [2024-06-20 16:52:42,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477498145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:42,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:42,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:52:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082813804] [2024-06-20 16:52:42,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:52:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:52:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:52:42,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:42,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 3205 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:42,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:42,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:42,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:43,668 INFO L124 PetriNetUnfolderBase]: 3490/5442 cut-off events. [2024-06-20 16:52:43,668 INFO L125 PetriNetUnfolderBase]: For 384560/384583 co-relation queries the response was YES. [2024-06-20 16:52:43,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43565 conditions, 5442 events. 3490/5442 cut-off events. For 384560/384583 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30409 event pairs, 728 based on Foata normal form. 28/5466 useless extension candidates. Maximal degree in co-relation 43468. Up to 5032 conditions per place. [2024-06-20 16:52:43,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 42 changer transitions 0/281 dead transitions. [2024-06-20 16:52:43,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3785 flow [2024-06-20 16:52:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 16:52:43,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-20 16:52:43,729 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 3205 flow. Second operand 9 states and 142 transitions. [2024-06-20 16:52:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3785 flow [2024-06-20 16:52:44,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 281 transitions, 3657 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-20 16:52:44,414 INFO L231 Difference]: Finished difference. Result has 202 places, 240 transitions, 3061 flow [2024-06-20 16:52:44,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3061, PETRI_PLACES=202, PETRI_TRANSITIONS=240} [2024-06-20 16:52:44,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 16:52:44,414 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 240 transitions, 3061 flow [2024-06-20 16:52:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:44,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:44,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:52:44,415 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)] === [2024-06-20 16:52:44,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash 751440302, now seen corresponding path program 3 times [2024-06-20 16:52:44,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:44,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985148603] [2024-06-20 16:52:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:44,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:45,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:45,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985148603] [2024-06-20 16:52:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985148603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:45,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:45,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786507028] [2024-06-20 16:52:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:45,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:45,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:46,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:46,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 240 transitions, 3061 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:46,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:46,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:46,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:47,585 INFO L124 PetriNetUnfolderBase]: 3497/5450 cut-off events. [2024-06-20 16:52:47,585 INFO L125 PetriNetUnfolderBase]: For 379424/379424 co-relation queries the response was YES. [2024-06-20 16:52:47,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43579 conditions, 5450 events. 3497/5450 cut-off events. For 379424/379424 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30469 event pairs, 844 based on Foata normal form. 3/5451 useless extension candidates. Maximal degree in co-relation 43481. Up to 5356 conditions per place. [2024-06-20 16:52:47,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 32 changer transitions 0/279 dead transitions. [2024-06-20 16:52:47,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 279 transitions, 3865 flow [2024-06-20 16:52:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:52:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:52:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:52:47,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:52:47,635 INFO L175 Difference]: Start difference. First operand has 202 places, 240 transitions, 3061 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:52:47,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 279 transitions, 3865 flow [2024-06-20 16:52:48,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 279 transitions, 3626 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 16:52:48,515 INFO L231 Difference]: Finished difference. Result has 201 places, 251 transitions, 3110 flow [2024-06-20 16:52:48,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3110, PETRI_PLACES=201, PETRI_TRANSITIONS=251} [2024-06-20 16:52:48,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 16:52:48,516 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 251 transitions, 3110 flow [2024-06-20 16:52:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:48,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:48,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:48,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:52:48,516 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)] === [2024-06-20 16:52:48,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2026726554, now seen corresponding path program 2 times [2024-06-20 16:52:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:48,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172794479] [2024-06-20 16:52:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:48,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172794479] [2024-06-20 16:52:50,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172794479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:50,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:50,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:50,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406815116] [2024-06-20 16:52:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:50,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:50,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 251 transitions, 3110 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:50,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:50,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:50,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:51,744 INFO L124 PetriNetUnfolderBase]: 3491/5442 cut-off events. [2024-06-20 16:52:51,744 INFO L125 PetriNetUnfolderBase]: For 381980/381980 co-relation queries the response was YES. [2024-06-20 16:52:51,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43269 conditions, 5442 events. 3491/5442 cut-off events. For 381980/381980 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 30458 event pairs, 844 based on Foata normal form. 2/5442 useless extension candidates. Maximal degree in co-relation 43170. Up to 5370 conditions per place. [2024-06-20 16:52:51,804 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 28 changer transitions 0/271 dead transitions. [2024-06-20 16:52:51,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 271 transitions, 3710 flow [2024-06-20 16:52:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:52:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:52:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 16:52:51,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 16:52:51,805 INFO L175 Difference]: Start difference. First operand has 201 places, 251 transitions, 3110 flow. Second operand 6 states and 100 transitions. [2024-06-20 16:52:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 271 transitions, 3710 flow [2024-06-20 16:52:52,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 271 transitions, 3614 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-20 16:52:52,373 INFO L231 Difference]: Finished difference. Result has 206 places, 251 transitions, 3076 flow [2024-06-20 16:52:52,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3014, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3076, PETRI_PLACES=206, PETRI_TRANSITIONS=251} [2024-06-20 16:52:52,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 16:52:52,373 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 251 transitions, 3076 flow [2024-06-20 16:52:52,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:52,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:52,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:52:52,374 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)] === [2024-06-20 16:52:52,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1297938656, now seen corresponding path program 1 times [2024-06-20 16:52:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:52,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168529963] [2024-06-20 16:52:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:54,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:54,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168529963] [2024-06-20 16:52:54,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168529963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:54,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:54,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:54,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639698197] [2024-06-20 16:52:54,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:54,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:54,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:54,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 251 transitions, 3076 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:54,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:54,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:54,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:56,348 INFO L124 PetriNetUnfolderBase]: 3527/5494 cut-off events. [2024-06-20 16:52:56,349 INFO L125 PetriNetUnfolderBase]: For 402341/402370 co-relation queries the response was YES. [2024-06-20 16:52:56,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43951 conditions, 5494 events. 3527/5494 cut-off events. For 402341/402370 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30756 event pairs, 845 based on Foata normal form. 24/5514 useless extension candidates. Maximal degree in co-relation 43849. Up to 5200 conditions per place. [2024-06-20 16:52:56,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 50 changer transitions 0/291 dead transitions. [2024-06-20 16:52:56,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 291 transitions, 4198 flow [2024-06-20 16:52:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:52:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:52:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:52:56,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:52:56,400 INFO L175 Difference]: Start difference. First operand has 206 places, 251 transitions, 3076 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:52:56,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 291 transitions, 4198 flow [2024-06-20 16:52:57,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 291 transitions, 4104 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:57,097 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3340 flow [2024-06-20 16:52:57,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3340, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-20 16:52:57,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-20 16:52:57,097 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3340 flow [2024-06-20 16:52:57,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:57,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:57,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:57,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:52:57,098 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)] === [2024-06-20 16:52:57,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1999156880, now seen corresponding path program 2 times [2024-06-20 16:52:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:57,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127174061] [2024-06-20 16:52:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:59,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:59,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127174061] [2024-06-20 16:52:59,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127174061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:59,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:59,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471694742] [2024-06-20 16:52:59,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:59,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:52:59,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3340 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:59,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:59,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:52:59,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:01,105 INFO L124 PetriNetUnfolderBase]: 3686/5714 cut-off events. [2024-06-20 16:53:01,105 INFO L125 PetriNetUnfolderBase]: For 450755/450755 co-relation queries the response was YES. [2024-06-20 16:53:01,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47248 conditions, 5714 events. 3686/5714 cut-off events. For 450755/450755 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 31955 event pairs, 845 based on Foata normal form. 12/5724 useless extension candidates. Maximal degree in co-relation 47144. Up to 5546 conditions per place. [2024-06-20 16:53:01,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 38 changer transitions 0/310 dead transitions. [2024-06-20 16:53:01,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 310 transitions, 4548 flow [2024-06-20 16:53:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:53:01,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:53:01,171 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3340 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:53:01,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 310 transitions, 4548 flow [2024-06-20 16:53:01,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 310 transitions, 4454 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-20 16:53:02,000 INFO L231 Difference]: Finished difference. Result has 216 places, 284 transitions, 3725 flow [2024-06-20 16:53:02,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3725, PETRI_PLACES=216, PETRI_TRANSITIONS=284} [2024-06-20 16:53:02,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 16:53:02,000 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 284 transitions, 3725 flow [2024-06-20 16:53:02,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:02,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:02,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:02,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:53:02,001 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)] === [2024-06-20 16:53:02,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash -491501246, now seen corresponding path program 3 times [2024-06-20 16:53:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100851544] [2024-06-20 16:53:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:04,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100851544] [2024-06-20 16:53:04,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100851544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:04,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:04,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666618326] [2024-06-20 16:53:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:04,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:04,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 284 transitions, 3725 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:04,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:04,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:04,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:06,223 INFO L124 PetriNetUnfolderBase]: 3814/5893 cut-off events. [2024-06-20 16:53:06,223 INFO L125 PetriNetUnfolderBase]: For 483522/483522 co-relation queries the response was YES. [2024-06-20 16:53:06,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50122 conditions, 5893 events. 3814/5893 cut-off events. For 483522/483522 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33008 event pairs, 840 based on Foata normal form. 12/5903 useless extension candidates. Maximal degree in co-relation 50015. Up to 5435 conditions per place. [2024-06-20 16:53:06,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 95 changer transitions 0/339 dead transitions. [2024-06-20 16:53:06,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 339 transitions, 4998 flow [2024-06-20 16:53:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:53:06,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:53:06,293 INFO L175 Difference]: Start difference. First operand has 216 places, 284 transitions, 3725 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:53:06,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 339 transitions, 4998 flow [2024-06-20 16:53:07,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 339 transitions, 4852 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:07,176 INFO L231 Difference]: Finished difference. Result has 222 places, 299 transitions, 4207 flow [2024-06-20 16:53:07,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4207, PETRI_PLACES=222, PETRI_TRANSITIONS=299} [2024-06-20 16:53:07,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 16:53:07,176 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 299 transitions, 4207 flow [2024-06-20 16:53:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:07,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:07,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:07,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:53:07,177 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)] === [2024-06-20 16:53:07,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1555334534, now seen corresponding path program 1 times [2024-06-20 16:53:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:07,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450335024] [2024-06-20 16:53:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:07,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450335024] [2024-06-20 16:53:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450335024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501681582] [2024-06-20 16:53:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:09,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:09,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 299 transitions, 4207 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:09,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:09,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:09,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:11,041 INFO L124 PetriNetUnfolderBase]: 3809/5886 cut-off events. [2024-06-20 16:53:11,041 INFO L125 PetriNetUnfolderBase]: For 483208/483208 co-relation queries the response was YES. [2024-06-20 16:53:11,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51172 conditions, 5886 events. 3809/5886 cut-off events. For 483208/483208 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32911 event pairs, 899 based on Foata normal form. 2/5886 useless extension candidates. Maximal degree in co-relation 51062. Up to 5851 conditions per place. [2024-06-20 16:53:11,104 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 296 selfloop transitions, 13 changer transitions 0/312 dead transitions. [2024-06-20 16:53:11,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4895 flow [2024-06-20 16:53:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:53:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:53:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-20 16:53:11,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-20 16:53:11,106 INFO L175 Difference]: Start difference. First operand has 222 places, 299 transitions, 4207 flow. Second operand 5 states and 78 transitions. [2024-06-20 16:53:11,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4895 flow [2024-06-20 16:53:11,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 312 transitions, 4747 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:11,855 INFO L231 Difference]: Finished difference. Result has 223 places, 301 transitions, 4134 flow [2024-06-20 16:53:11,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4134, PETRI_PLACES=223, PETRI_TRANSITIONS=301} [2024-06-20 16:53:11,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-20 16:53:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 301 transitions, 4134 flow [2024-06-20 16:53:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:11,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:11,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:53:11,856 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)] === [2024-06-20 16:53:11,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1239289176, now seen corresponding path program 1 times [2024-06-20 16:53:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107248067] [2024-06-20 16:53:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:14,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:14,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107248067] [2024-06-20 16:53:14,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107248067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:14,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:14,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:14,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359493522] [2024-06-20 16:53:14,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:14,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:14,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:14,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:14,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:14,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:14,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 301 transitions, 4134 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:14,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:14,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:14,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:15,854 INFO L124 PetriNetUnfolderBase]: 3814/5893 cut-off events. [2024-06-20 16:53:15,855 INFO L125 PetriNetUnfolderBase]: For 460471/460471 co-relation queries the response was YES. [2024-06-20 16:53:15,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50216 conditions, 5893 events. 3814/5893 cut-off events. For 460471/460471 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33010 event pairs, 892 based on Foata normal form. 1/5892 useless extension candidates. Maximal degree in co-relation 50104. Up to 5770 conditions per place. [2024-06-20 16:53:15,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 305 selfloop transitions, 38 changer transitions 0/346 dead transitions. [2024-06-20 16:53:15,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 346 transitions, 5162 flow [2024-06-20 16:53:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:53:15,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:53:15,925 INFO L175 Difference]: Start difference. First operand has 223 places, 301 transitions, 4134 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:53:15,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 346 transitions, 5162 flow [2024-06-20 16:53:16,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 346 transitions, 5105 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:16,984 INFO L231 Difference]: Finished difference. Result has 229 places, 307 transitions, 4274 flow [2024-06-20 16:53:16,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4274, PETRI_PLACES=229, PETRI_TRANSITIONS=307} [2024-06-20 16:53:16,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 16:53:16,985 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 307 transitions, 4274 flow [2024-06-20 16:53:16,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:16,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:16,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:16,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:53:16,985 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)] === [2024-06-20 16:53:16,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1239558287, now seen corresponding path program 1 times [2024-06-20 16:53:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874789474] [2024-06-20 16:53:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:16,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:18,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874789474] [2024-06-20 16:53:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874789474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:18,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:18,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256496140] [2024-06-20 16:53:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:18,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:18,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:18,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:18,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:18,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 307 transitions, 4274 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:18,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:18,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:18,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:20,632 INFO L124 PetriNetUnfolderBase]: 3824/5907 cut-off events. [2024-06-20 16:53:20,633 INFO L125 PetriNetUnfolderBase]: For 478188/478188 co-relation queries the response was YES. [2024-06-20 16:53:20,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50981 conditions, 5907 events. 3824/5907 cut-off events. For 478188/478188 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33081 event pairs, 873 based on Foata normal form. 2/5907 useless extension candidates. Maximal degree in co-relation 50868. Up to 5770 conditions per place. [2024-06-20 16:53:20,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 302 selfloop transitions, 48 changer transitions 0/353 dead transitions. [2024-06-20 16:53:20,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 353 transitions, 5436 flow [2024-06-20 16:53:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:53:20,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:53:20,692 INFO L175 Difference]: Start difference. First operand has 229 places, 307 transitions, 4274 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:53:20,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 353 transitions, 5436 flow [2024-06-20 16:53:21,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 353 transitions, 5337 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:21,875 INFO L231 Difference]: Finished difference. Result has 234 places, 320 transitions, 4568 flow [2024-06-20 16:53:21,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4568, PETRI_PLACES=234, PETRI_TRANSITIONS=320} [2024-06-20 16:53:21,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-20 16:53:21,875 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 320 transitions, 4568 flow [2024-06-20 16:53:21,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:21,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:21,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:53:21,876 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)] === [2024-06-20 16:53:21,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash -854334214, now seen corresponding path program 1 times [2024-06-20 16:53:21,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:21,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919692877] [2024-06-20 16:53:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:21,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:24,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919692877] [2024-06-20 16:53:24,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919692877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:24,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:24,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:24,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568719723] [2024-06-20 16:53:24,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:24,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:24,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:24,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:24,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:24,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 320 transitions, 4568 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:24,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:24,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:24,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:25,967 INFO L124 PetriNetUnfolderBase]: 3845/5938 cut-off events. [2024-06-20 16:53:25,967 INFO L125 PetriNetUnfolderBase]: For 498121/498125 co-relation queries the response was YES. [2024-06-20 16:53:26,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52303 conditions, 5938 events. 3845/5938 cut-off events. For 498121/498125 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33347 event pairs, 923 based on Foata normal form. 1/5937 useless extension candidates. Maximal degree in co-relation 52186. Up to 5589 conditions per place. [2024-06-20 16:53:26,050 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-20 16:53:26,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 361 transitions, 5987 flow [2024-06-20 16:53:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:53:26,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:53:26,051 INFO L175 Difference]: Start difference. First operand has 234 places, 320 transitions, 4568 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:53:26,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 361 transitions, 5987 flow [2024-06-20 16:53:27,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 361 transitions, 5899 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:27,245 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 4914 flow [2024-06-20 16:53:27,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4914, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-06-20 16:53:27,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 16:53:27,246 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 4914 flow [2024-06-20 16:53:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:27,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:27,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:27,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:53:27,246 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)] === [2024-06-20 16:53:27,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1448920578, now seen corresponding path program 2 times [2024-06-20 16:53:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:27,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524117809] [2024-06-20 16:53:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:27,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:29,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:29,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524117809] [2024-06-20 16:53:29,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524117809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:29,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:29,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:29,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395313749] [2024-06-20 16:53:29,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:29,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:29,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:29,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:29,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 4914 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:29,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:29,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:29,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:31,318 INFO L124 PetriNetUnfolderBase]: 3858/5957 cut-off events. [2024-06-20 16:53:31,318 INFO L125 PetriNetUnfolderBase]: For 516183/516187 co-relation queries the response was YES. [2024-06-20 16:53:31,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53165 conditions, 5957 events. 3858/5957 cut-off events. For 516183/516187 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33452 event pairs, 927 based on Foata normal form. 1/5956 useless extension candidates. Maximal degree in co-relation 53045. Up to 5602 conditions per place. [2024-06-20 16:53:31,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 83 changer transitions 0/360 dead transitions. [2024-06-20 16:53:31,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 360 transitions, 6169 flow [2024-06-20 16:53:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:53:31,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:53:31,394 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 4914 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:53:31,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 360 transitions, 6169 flow [2024-06-20 16:53:32,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 360 transitions, 6044 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 16:53:32,402 INFO L231 Difference]: Finished difference. Result has 244 places, 335 transitions, 5030 flow [2024-06-20 16:53:32,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5030, PETRI_PLACES=244, PETRI_TRANSITIONS=335} [2024-06-20 16:53:32,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 16:53:32,403 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 335 transitions, 5030 flow [2024-06-20 16:53:32,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:32,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:32,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:32,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:53:32,403 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)] === [2024-06-20 16:53:32,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:32,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1248823877, now seen corresponding path program 2 times [2024-06-20 16:53:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:32,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372201776] [2024-06-20 16:53:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:32,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:34,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:34,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372201776] [2024-06-20 16:53:34,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372201776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:34,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:34,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:34,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609382798] [2024-06-20 16:53:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:34,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:34,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:34,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 335 transitions, 5030 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:34,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:34,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:36,274 INFO L124 PetriNetUnfolderBase]: 3868/5968 cut-off events. [2024-06-20 16:53:36,274 INFO L125 PetriNetUnfolderBase]: For 533838/533838 co-relation queries the response was YES. [2024-06-20 16:53:36,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53580 conditions, 5968 events. 3868/5968 cut-off events. For 533838/533838 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33509 event pairs, 889 based on Foata normal form. 2/5968 useless extension candidates. Maximal degree in co-relation 53458. Up to 5893 conditions per place. [2024-06-20 16:53:36,342 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 34 changer transitions 0/363 dead transitions. [2024-06-20 16:53:36,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 363 transitions, 5944 flow [2024-06-20 16:53:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 16:53:36,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-20 16:53:36,343 INFO L175 Difference]: Start difference. First operand has 244 places, 335 transitions, 5030 flow. Second operand 8 states and 118 transitions. [2024-06-20 16:53:36,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 363 transitions, 5944 flow [2024-06-20 16:53:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 363 transitions, 5792 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:37,583 INFO L231 Difference]: Finished difference. Result has 249 places, 341 transitions, 5090 flow [2024-06-20 16:53:37,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5090, PETRI_PLACES=249, PETRI_TRANSITIONS=341} [2024-06-20 16:53:37,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-20 16:53:37,584 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 341 transitions, 5090 flow [2024-06-20 16:53:37,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:37,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:37,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:37,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:53:37,584 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)] === [2024-06-20 16:53:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1248812376, now seen corresponding path program 2 times [2024-06-20 16:53:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657294898] [2024-06-20 16:53:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:39,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:39,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657294898] [2024-06-20 16:53:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657294898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:39,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076338870] [2024-06-20 16:53:39,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:39,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:39,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 341 transitions, 5090 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:39,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:39,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:39,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:41,468 INFO L124 PetriNetUnfolderBase]: 3873/5975 cut-off events. [2024-06-20 16:53:41,468 INFO L125 PetriNetUnfolderBase]: For 545723/545723 co-relation queries the response was YES. [2024-06-20 16:53:41,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53581 conditions, 5975 events. 3873/5975 cut-off events. For 545723/545723 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33524 event pairs, 888 based on Foata normal form. 1/5974 useless extension candidates. Maximal degree in co-relation 53458. Up to 5912 conditions per place. [2024-06-20 16:53:41,545 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 25 changer transitions 0/365 dead transitions. [2024-06-20 16:53:41,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 365 transitions, 5920 flow [2024-06-20 16:53:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-20 16:53:41,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-20 16:53:41,546 INFO L175 Difference]: Start difference. First operand has 249 places, 341 transitions, 5090 flow. Second operand 8 states and 115 transitions. [2024-06-20 16:53:41,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 365 transitions, 5920 flow [2024-06-20 16:53:42,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 365 transitions, 5785 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:42,898 INFO L231 Difference]: Finished difference. Result has 252 places, 344 transitions, 5063 flow [2024-06-20 16:53:42,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5063, PETRI_PLACES=252, PETRI_TRANSITIONS=344} [2024-06-20 16:53:42,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 16:53:42,898 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 344 transitions, 5063 flow [2024-06-20 16:53:42,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:42,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:42,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:42,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:53:42,899 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)] === [2024-06-20 16:53:42,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1248812717, now seen corresponding path program 3 times [2024-06-20 16:53:42,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:42,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113554481] [2024-06-20 16:53:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:42,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:44,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113554481] [2024-06-20 16:53:44,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113554481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:44,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:44,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:44,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927673418] [2024-06-20 16:53:44,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:44,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:44,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:44,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:44,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:44,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 344 transitions, 5063 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:44,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:44,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:44,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:46,804 INFO L124 PetriNetUnfolderBase]: 3883/5989 cut-off events. [2024-06-20 16:53:46,804 INFO L125 PetriNetUnfolderBase]: For 562784/562784 co-relation queries the response was YES. [2024-06-20 16:53:46,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 5989 events. 3883/5989 cut-off events. For 562784/562784 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 33574 event pairs, 870 based on Foata normal form. 2/5989 useless extension candidates. Maximal degree in co-relation 53768. Up to 5905 conditions per place. [2024-06-20 16:53:46,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 39 changer transitions 0/370 dead transitions. [2024-06-20 16:53:46,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 370 transitions, 5948 flow [2024-06-20 16:53:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 16:53:46,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 16:53:46,873 INFO L175 Difference]: Start difference. First operand has 252 places, 344 transitions, 5063 flow. Second operand 8 states and 121 transitions. [2024-06-20 16:53:46,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 370 transitions, 5948 flow [2024-06-20 16:53:48,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 370 transitions, 5879 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:48,365 INFO L231 Difference]: Finished difference. Result has 255 places, 347 transitions, 5157 flow [2024-06-20 16:53:48,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5157, PETRI_PLACES=255, PETRI_TRANSITIONS=347} [2024-06-20 16:53:48,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 16:53:48,366 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 347 transitions, 5157 flow [2024-06-20 16:53:48,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:53:48,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:48,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:53:48,367 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)] === [2024-06-20 16:53:48,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1589107514, now seen corresponding path program 3 times [2024-06-20 16:53:48,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:48,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024702465] [2024-06-20 16:53:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:50,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024702465] [2024-06-20 16:53:50,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024702465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:50,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:50,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:50,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003404164] [2024-06-20 16:53:50,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:50,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:50,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:50,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:50,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 347 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:50,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:50,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:50,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:52,822 INFO L124 PetriNetUnfolderBase]: 3874/5979 cut-off events. [2024-06-20 16:53:52,822 INFO L125 PetriNetUnfolderBase]: For 574829/574858 co-relation queries the response was YES. [2024-06-20 16:53:52,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53866 conditions, 5979 events. 3874/5979 cut-off events. For 574829/574858 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33581 event pairs, 872 based on Foata normal form. 23/5998 useless extension candidates. Maximal degree in co-relation 53741. Up to 5630 conditions per place. [2024-06-20 16:53:53,021 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 75 changer transitions 0/373 dead transitions. [2024-06-20 16:53:53,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 373 transitions, 6267 flow [2024-06-20 16:53:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:53:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:53:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:53:53,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:53:53,022 INFO L175 Difference]: Start difference. First operand has 255 places, 347 transitions, 5157 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:53:53,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 373 transitions, 6267 flow [2024-06-20 16:53:54,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 373 transitions, 6111 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:53:54,268 INFO L231 Difference]: Finished difference. Result has 256 places, 347 transitions, 5161 flow [2024-06-20 16:53:54,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5161, PETRI_PLACES=256, PETRI_TRANSITIONS=347} [2024-06-20 16:53:54,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-20 16:53:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 347 transitions, 5161 flow [2024-06-20 16:53:54,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:54,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:54,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:53:54,269 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)] === [2024-06-20 16:53:54,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1844327208, now seen corresponding path program 4 times [2024-06-20 16:53:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:54,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790702792] [2024-06-20 16:53:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:54,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790702792] [2024-06-20 16:53:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790702792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:56,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:53:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804970407] [2024-06-20 16:53:56,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:56,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:53:56,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:53:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:53:56,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:53:56,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 347 transitions, 5161 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:56,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:56,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:53:56,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:58,386 INFO L124 PetriNetUnfolderBase]: 3835/5924 cut-off events. [2024-06-20 16:53:58,387 INFO L125 PetriNetUnfolderBase]: For 580944/580944 co-relation queries the response was YES. [2024-06-20 16:53:58,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53089 conditions, 5924 events. 3835/5924 cut-off events. For 580944/580944 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33252 event pairs, 831 based on Foata normal form. 9/5931 useless extension candidates. Maximal degree in co-relation 52963. Up to 5778 conditions per place. [2024-06-20 16:53:58,460 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 40 changer transitions 0/371 dead transitions. [2024-06-20 16:53:58,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 371 transitions, 6018 flow [2024-06-20 16:53:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:53:58,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 16:53:58,461 INFO L175 Difference]: Start difference. First operand has 256 places, 347 transitions, 5161 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:53:58,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 371 transitions, 6018 flow [2024-06-20 16:53:59,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 5818 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:59,903 INFO L231 Difference]: Finished difference. Result has 259 places, 347 transitions, 5056 flow [2024-06-20 16:53:59,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5056, PETRI_PLACES=259, PETRI_TRANSITIONS=347} [2024-06-20 16:53:59,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 16:53:59,904 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 347 transitions, 5056 flow [2024-06-20 16:53:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:59,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:59,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:59,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:53:59,904 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)] === [2024-06-20 16:53:59,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1595992152, now seen corresponding path program 5 times [2024-06-20 16:53:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112723654] [2024-06-20 16:53:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112723654] [2024-06-20 16:54:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112723654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:02,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:02,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:54:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735770814] [2024-06-20 16:54:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:02,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:54:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:54:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:54:02,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:02,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 347 transitions, 5056 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:02,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:02,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:02,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:04,262 INFO L124 PetriNetUnfolderBase]: 3842/5934 cut-off events. [2024-06-20 16:54:04,262 INFO L125 PetriNetUnfolderBase]: For 577677/577679 co-relation queries the response was YES. [2024-06-20 16:54:04,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53046 conditions, 5934 events. 3842/5934 cut-off events. For 577677/577679 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33298 event pairs, 829 based on Foata normal form. 5/5937 useless extension candidates. Maximal degree in co-relation 52919. Up to 5487 conditions per place. [2024-06-20 16:54:04,328 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 99 changer transitions 0/385 dead transitions. [2024-06-20 16:54:04,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 385 transitions, 6176 flow [2024-06-20 16:54:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:54:04,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 16:54:04,329 INFO L175 Difference]: Start difference. First operand has 259 places, 347 transitions, 5056 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:54:04,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 385 transitions, 6176 flow [2024-06-20 16:54:05,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 385 transitions, 6072 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:54:05,779 INFO L231 Difference]: Finished difference. Result has 259 places, 350 transitions, 5244 flow [2024-06-20 16:54:05,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=259, PETRI_TRANSITIONS=350} [2024-06-20 16:54:05,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 16:54:05,780 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 350 transitions, 5244 flow [2024-06-20 16:54:05,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:05,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:05,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:05,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:54:05,780 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)] === [2024-06-20 16:54:05,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash 963090042, now seen corresponding path program 6 times [2024-06-20 16:54:05,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:05,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085946589] [2024-06-20 16:54:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:08,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:08,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085946589] [2024-06-20 16:54:08,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085946589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:08,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:08,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:54:08,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854474604] [2024-06-20 16:54:08,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:08,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:54:08,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:54:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:54:08,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:08,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 350 transitions, 5244 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:08,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:08,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:08,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:10,563 INFO L124 PetriNetUnfolderBase]: 3803/5879 cut-off events. [2024-06-20 16:54:10,564 INFO L125 PetriNetUnfolderBase]: For 585374/585374 co-relation queries the response was YES. [2024-06-20 16:54:10,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52449 conditions, 5879 events. 3803/5879 cut-off events. For 585374/585374 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33035 event pairs, 834 based on Foata normal form. 9/5886 useless extension candidates. Maximal degree in co-relation 52321. Up to 5456 conditions per place. [2024-06-20 16:54:10,642 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 98 changer transitions 0/388 dead transitions. [2024-06-20 16:54:10,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 388 transitions, 6162 flow [2024-06-20 16:54:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:54:10,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:54:10,643 INFO L175 Difference]: Start difference. First operand has 259 places, 350 transitions, 5244 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:54:10,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 388 transitions, 6162 flow [2024-06-20 16:54:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 388 transitions, 5922 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:12,306 INFO L231 Difference]: Finished difference. Result has 262 places, 350 transitions, 5241 flow [2024-06-20 16:54:12,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5241, PETRI_PLACES=262, PETRI_TRANSITIONS=350} [2024-06-20 16:54:12,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 16:54:12,307 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 350 transitions, 5241 flow [2024-06-20 16:54:12,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:12,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:12,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:12,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:54:12,308 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)] === [2024-06-20 16:54:12,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1400662234, now seen corresponding path program 3 times [2024-06-20 16:54:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462268739] [2024-06-20 16:54:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:14,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462268739] [2024-06-20 16:54:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462268739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:14,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:14,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089614520] [2024-06-20 16:54:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:14,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:14,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:14,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:14,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 350 transitions, 5241 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:14,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:14,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:14,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:16,255 INFO L124 PetriNetUnfolderBase]: 3810/5889 cut-off events. [2024-06-20 16:54:16,255 INFO L125 PetriNetUnfolderBase]: For 567477/567477 co-relation queries the response was YES. [2024-06-20 16:54:16,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52433 conditions, 5889 events. 3810/5889 cut-off events. For 567477/567477 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 33052 event pairs, 857 based on Foata normal form. 3/5890 useless extension candidates. Maximal degree in co-relation 52305. Up to 5765 conditions per place. [2024-06-20 16:54:16,330 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 347 selfloop transitions, 41 changer transitions 0/391 dead transitions. [2024-06-20 16:54:16,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 391 transitions, 6209 flow [2024-06-20 16:54:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:54:16,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 16:54:16,331 INFO L175 Difference]: Start difference. First operand has 262 places, 350 transitions, 5241 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:54:16,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 391 transitions, 6209 flow [2024-06-20 16:54:18,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 391 transitions, 5877 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 16:54:18,091 INFO L231 Difference]: Finished difference. Result has 259 places, 353 transitions, 5080 flow [2024-06-20 16:54:18,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5080, PETRI_PLACES=259, PETRI_TRANSITIONS=353} [2024-06-20 16:54:18,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 16:54:18,092 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 353 transitions, 5080 flow [2024-06-20 16:54:18,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:18,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:18,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:18,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:54:18,092 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)] === [2024-06-20 16:54:18,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash 957383655, now seen corresponding path program 4 times [2024-06-20 16:54:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:18,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309321290] [2024-06-20 16:54:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:18,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309321290] [2024-06-20 16:54:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309321290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:19,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:19,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:19,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548862880] [2024-06-20 16:54:19,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:19,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:19,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:19,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:19,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:19,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 353 transitions, 5080 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:19,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:19,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:19,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:21,709 INFO L124 PetriNetUnfolderBase]: 3812/5892 cut-off events. [2024-06-20 16:54:21,710 INFO L125 PetriNetUnfolderBase]: For 547147/547147 co-relation queries the response was YES. [2024-06-20 16:54:21,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52098 conditions, 5892 events. 3812/5892 cut-off events. For 547147/547147 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33056 event pairs, 843 based on Foata normal form. 2/5892 useless extension candidates. Maximal degree in co-relation 51971. Up to 5825 conditions per place. [2024-06-20 16:54:21,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 29 changer transitions 0/377 dead transitions. [2024-06-20 16:54:21,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 377 transitions, 5973 flow [2024-06-20 16:54:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 16:54:21,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 16:54:21,781 INFO L175 Difference]: Start difference. First operand has 259 places, 353 transitions, 5080 flow. Second operand 7 states and 108 transitions. [2024-06-20 16:54:21,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 377 transitions, 5973 flow [2024-06-20 16:54:22,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 377 transitions, 5867 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:22,935 INFO L231 Difference]: Finished difference. Result has 262 places, 356 transitions, 5125 flow [2024-06-20 16:54:22,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5125, PETRI_PLACES=262, PETRI_TRANSITIONS=356} [2024-06-20 16:54:22,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 16:54:22,935 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 356 transitions, 5125 flow [2024-06-20 16:54:22,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:22,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:22,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:22,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:54:22,936 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)] === [2024-06-20 16:54:22,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1595995779, now seen corresponding path program 5 times [2024-06-20 16:54:22,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:22,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263210121] [2024-06-20 16:54:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:22,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:24,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:24,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263210121] [2024-06-20 16:54:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263210121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:24,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:24,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708999794] [2024-06-20 16:54:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:24,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:24,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:24,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 356 transitions, 5125 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:24,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:24,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:24,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:26,632 INFO L124 PetriNetUnfolderBase]: 3806/5884 cut-off events. [2024-06-20 16:54:26,632 INFO L125 PetriNetUnfolderBase]: For 555917/555917 co-relation queries the response was YES. [2024-06-20 16:54:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51986 conditions, 5884 events. 3806/5884 cut-off events. For 555917/555917 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33031 event pairs, 856 based on Foata normal form. 2/5884 useless extension candidates. Maximal degree in co-relation 51858. Up to 5775 conditions per place. [2024-06-20 16:54:26,704 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 42 changer transitions 0/386 dead transitions. [2024-06-20 16:54:26,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 386 transitions, 5991 flow [2024-06-20 16:54:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:54:26,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:54:26,705 INFO L175 Difference]: Start difference. First operand has 262 places, 356 transitions, 5125 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:54:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 386 transitions, 5991 flow [2024-06-20 16:54:27,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 386 transitions, 5808 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:27,890 INFO L231 Difference]: Finished difference. Result has 264 places, 356 transitions, 5032 flow [2024-06-20 16:54:27,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4942, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5032, PETRI_PLACES=264, PETRI_TRANSITIONS=356} [2024-06-20 16:54:27,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 16:54:27,891 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 356 transitions, 5032 flow [2024-06-20 16:54:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:27,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:27,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:27,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:54:27,892 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)] === [2024-06-20 16:54:27,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1581390653, now seen corresponding path program 1 times [2024-06-20 16:54:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555763761] [2024-06-20 16:54:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:30,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555763761] [2024-06-20 16:54:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555763761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:30,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:30,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:30,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991513360] [2024-06-20 16:54:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:30,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:30,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:30,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:30,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 356 transitions, 5032 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:30,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:30,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:30,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:32,649 INFO L124 PetriNetUnfolderBase]: 3878/5986 cut-off events. [2024-06-20 16:54:32,649 INFO L125 PetriNetUnfolderBase]: For 597589/597615 co-relation queries the response was YES. [2024-06-20 16:54:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53272 conditions, 5986 events. 3878/5986 cut-off events. For 597589/597615 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33660 event pairs, 841 based on Foata normal form. 26/6008 useless extension candidates. Maximal degree in co-relation 53143. Up to 5292 conditions per place. [2024-06-20 16:54:32,711 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 118 changer transitions 0/399 dead transitions. [2024-06-20 16:54:32,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 399 transitions, 6522 flow [2024-06-20 16:54:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:54:32,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:54:32,712 INFO L175 Difference]: Start difference. First operand has 264 places, 356 transitions, 5032 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:54:32,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 399 transitions, 6522 flow [2024-06-20 16:54:34,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 399 transitions, 6373 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:34,173 INFO L231 Difference]: Finished difference. Result has 267 places, 368 transitions, 5484 flow [2024-06-20 16:54:34,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5484, PETRI_PLACES=267, PETRI_TRANSITIONS=368} [2024-06-20 16:54:34,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-20 16:54:34,174 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 368 transitions, 5484 flow [2024-06-20 16:54:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:34,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:34,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:34,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:54:34,175 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)] === [2024-06-20 16:54:34,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1577671583, now seen corresponding path program 2 times [2024-06-20 16:54:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:34,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889548979] [2024-06-20 16:54:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:34,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:36,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:36,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889548979] [2024-06-20 16:54:36,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889548979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:36,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:36,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136302626] [2024-06-20 16:54:36,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:36,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:36,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:36,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 368 transitions, 5484 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:36,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:36,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:36,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:38,802 INFO L124 PetriNetUnfolderBase]: 3998/6150 cut-off events. [2024-06-20 16:54:38,802 INFO L125 PetriNetUnfolderBase]: For 648848/648848 co-relation queries the response was YES. [2024-06-20 16:54:38,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56955 conditions, 6150 events. 3998/6150 cut-off events. For 648848/648848 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 34539 event pairs, 855 based on Foata normal form. 8/6156 useless extension candidates. Maximal degree in co-relation 56824. Up to 5906 conditions per place. [2024-06-20 16:54:38,888 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 50 changer transitions 0/408 dead transitions. [2024-06-20 16:54:38,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 408 transitions, 7017 flow [2024-06-20 16:54:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:54:38,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 16:54:38,889 INFO L175 Difference]: Start difference. First operand has 267 places, 368 transitions, 5484 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:54:38,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 408 transitions, 7017 flow [2024-06-20 16:54:40,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 408 transitions, 6864 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-20 16:54:40,829 INFO L231 Difference]: Finished difference. Result has 274 places, 379 transitions, 5755 flow [2024-06-20 16:54:40,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5755, PETRI_PLACES=274, PETRI_TRANSITIONS=379} [2024-06-20 16:54:40,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 16:54:40,829 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 379 transitions, 5755 flow [2024-06-20 16:54:40,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:40,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:40,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:40,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:54:40,830 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)] === [2024-06-20 16:54:40,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash 963098133, now seen corresponding path program 3 times [2024-06-20 16:54:40,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:40,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811385252] [2024-06-20 16:54:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:43,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:43,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811385252] [2024-06-20 16:54:43,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811385252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:43,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:43,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120320946] [2024-06-20 16:54:43,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:43,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:43,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 379 transitions, 5755 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:43,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:43,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:45,950 INFO L124 PetriNetUnfolderBase]: 4086/6272 cut-off events. [2024-06-20 16:54:45,950 INFO L125 PetriNetUnfolderBase]: For 680934/680934 co-relation queries the response was YES. [2024-06-20 16:54:46,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58352 conditions, 6272 events. 4086/6272 cut-off events. For 680934/680934 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 35253 event pairs, 843 based on Foata normal form. 8/6278 useless extension candidates. Maximal degree in co-relation 58218. Up to 5639 conditions per place. [2024-06-20 16:54:46,028 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 126 changer transitions 0/432 dead transitions. [2024-06-20 16:54:46,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 432 transitions, 7345 flow [2024-06-20 16:54:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:54:46,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:54:46,030 INFO L175 Difference]: Start difference. First operand has 274 places, 379 transitions, 5755 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:54:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 432 transitions, 7345 flow [2024-06-20 16:54:47,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 432 transitions, 7237 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:47,593 INFO L231 Difference]: Finished difference. Result has 280 places, 389 transitions, 6257 flow [2024-06-20 16:54:47,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5647, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6257, PETRI_PLACES=280, PETRI_TRANSITIONS=389} [2024-06-20 16:54:47,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 16:54:47,593 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 389 transitions, 6257 flow [2024-06-20 16:54:47,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:54:47,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:47,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:47,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:54:47,594 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)] === [2024-06-20 16:54:47,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash 155280311, now seen corresponding path program 1 times [2024-06-20 16:54:47,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:47,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349725295] [2024-06-20 16:54:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:49,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:49,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349725295] [2024-06-20 16:54:49,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349725295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:49,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:49,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:49,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658298170] [2024-06-20 16:54:49,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:49,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:49,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:50,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:50,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 389 transitions, 6257 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:50,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:50,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:50,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:52,154 INFO L124 PetriNetUnfolderBase]: 4094/6284 cut-off events. [2024-06-20 16:54:52,154 INFO L125 PetriNetUnfolderBase]: For 682304/682304 co-relation queries the response was YES. [2024-06-20 16:54:52,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59401 conditions, 6284 events. 4094/6284 cut-off events. For 682304/682304 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35211 event pairs, 808 based on Foata normal form. 2/6284 useless extension candidates. Maximal degree in co-relation 59264. Up to 6102 conditions per place. [2024-06-20 16:54:52,239 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 45 changer transitions 0/438 dead transitions. [2024-06-20 16:54:52,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 438 transitions, 7497 flow [2024-06-20 16:54:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:54:52,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:54:52,241 INFO L175 Difference]: Start difference. First operand has 280 places, 389 transitions, 6257 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:54:52,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 438 transitions, 7497 flow [2024-06-20 16:54:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 438 transitions, 7371 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:53,725 INFO L231 Difference]: Finished difference. Result has 285 places, 393 transitions, 6324 flow [2024-06-20 16:54:53,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6324, PETRI_PLACES=285, PETRI_TRANSITIONS=393} [2024-06-20 16:54:53,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-20 16:54:53,726 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 393 transitions, 6324 flow [2024-06-20 16:54:53,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:53,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:53,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:53,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:54:53,726 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)] === [2024-06-20 16:54:53,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash 155519631, now seen corresponding path program 1 times [2024-06-20 16:54:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:53,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317077536] [2024-06-20 16:54:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:53,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:56,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317077536] [2024-06-20 16:54:56,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317077536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:56,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:56,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493303683] [2024-06-20 16:54:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:54:56,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 393 transitions, 6324 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:56,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:56,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:54:56,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:58,164 INFO L124 PetriNetUnfolderBase]: 4117/6316 cut-off events. [2024-06-20 16:54:58,164 INFO L125 PetriNetUnfolderBase]: For 685972/685972 co-relation queries the response was YES. [2024-06-20 16:54:58,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59766 conditions, 6316 events. 4117/6316 cut-off events. For 685972/685972 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35539 event pairs, 928 based on Foata normal form. 2/6316 useless extension candidates. Maximal degree in co-relation 59627. Up to 6097 conditions per place. [2024-06-20 16:54:58,246 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 363 selfloop transitions, 79 changer transitions 0/445 dead transitions. [2024-06-20 16:54:58,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 445 transitions, 7681 flow [2024-06-20 16:54:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:54:58,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 16:54:58,247 INFO L175 Difference]: Start difference. First operand has 285 places, 393 transitions, 6324 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:54:58,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 445 transitions, 7681 flow [2024-06-20 16:54:59,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 445 transitions, 7566 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:59,902 INFO L231 Difference]: Finished difference. Result has 290 places, 402 transitions, 6558 flow [2024-06-20 16:54:59,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6558, PETRI_PLACES=290, PETRI_TRANSITIONS=402} [2024-06-20 16:54:59,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 16:54:59,903 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 402 transitions, 6558 flow [2024-06-20 16:54:59,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:59,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:59,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:59,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:54:59,903 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)] === [2024-06-20 16:54:59,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash -236739499, now seen corresponding path program 2 times [2024-06-20 16:54:59,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:59,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305312502] [2024-06-20 16:54:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:02,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:02,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305312502] [2024-06-20 16:55:02,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305312502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:02,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:02,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:02,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515922748] [2024-06-20 16:55:02,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:02,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:02,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:02,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:02,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 402 transitions, 6558 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:02,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:02,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:02,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:04,303 INFO L124 PetriNetUnfolderBase]: 4125/6328 cut-off events. [2024-06-20 16:55:04,303 INFO L125 PetriNetUnfolderBase]: For 705213/705213 co-relation queries the response was YES. [2024-06-20 16:55:04,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60484 conditions, 6328 events. 4125/6328 cut-off events. For 705213/705213 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 35596 event pairs, 929 based on Foata normal form. 2/6328 useless extension candidates. Maximal degree in co-relation 60342. Up to 6198 conditions per place. [2024-06-20 16:55:04,395 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 45 changer transitions 0/443 dead transitions. [2024-06-20 16:55:04,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 443 transitions, 7580 flow [2024-06-20 16:55:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:55:04,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 16:55:04,396 INFO L175 Difference]: Start difference. First operand has 290 places, 402 transitions, 6558 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:55:04,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 443 transitions, 7580 flow [2024-06-20 16:55:06,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 443 transitions, 7435 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:06,154 INFO L231 Difference]: Finished difference. Result has 295 places, 404 transitions, 6542 flow [2024-06-20 16:55:06,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6413, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6542, PETRI_PLACES=295, PETRI_TRANSITIONS=404} [2024-06-20 16:55:06,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-20 16:55:06,154 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 404 transitions, 6542 flow [2024-06-20 16:55:06,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:06,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:06,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:55:06,155 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)] === [2024-06-20 16:55:06,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 158140247, now seen corresponding path program 1 times [2024-06-20 16:55:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110025570] [2024-06-20 16:55:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:06,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110025570] [2024-06-20 16:55:08,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110025570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:08,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:08,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:08,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118462090] [2024-06-20 16:55:08,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:08,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:08,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 404 transitions, 6542 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:08,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:08,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:10,941 INFO L124 PetriNetUnfolderBase]: 4138/6346 cut-off events. [2024-06-20 16:55:10,942 INFO L125 PetriNetUnfolderBase]: For 721688/721688 co-relation queries the response was YES. [2024-06-20 16:55:11,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60941 conditions, 6346 events. 4138/6346 cut-off events. For 721688/721688 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35735 event pairs, 928 based on Foata normal form. 1/6345 useless extension candidates. Maximal degree in co-relation 60797. Up to 6231 conditions per place. [2024-06-20 16:55:11,037 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 37 changer transitions 0/444 dead transitions. [2024-06-20 16:55:11,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 444 transitions, 7796 flow [2024-06-20 16:55:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:55:11,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:55:11,038 INFO L175 Difference]: Start difference. First operand has 295 places, 404 transitions, 6542 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:55:11,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 444 transitions, 7796 flow [2024-06-20 16:55:12,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 444 transitions, 7697 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:12,961 INFO L231 Difference]: Finished difference. Result has 296 places, 410 transitions, 6649 flow [2024-06-20 16:55:12,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6443, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6649, PETRI_PLACES=296, PETRI_TRANSITIONS=410} [2024-06-20 16:55:12,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 16:55:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 410 transitions, 6649 flow [2024-06-20 16:55:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:55:12,962 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)] === [2024-06-20 16:55:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash 163854167, now seen corresponding path program 2 times [2024-06-20 16:55:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6774306] [2024-06-20 16:55:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:15,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:15,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6774306] [2024-06-20 16:55:15,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6774306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:15,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:15,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672131052] [2024-06-20 16:55:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:15,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:15,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 410 transitions, 6649 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:15,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:15,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:15,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:17,477 INFO L124 PetriNetUnfolderBase]: 4143/6353 cut-off events. [2024-06-20 16:55:17,477 INFO L125 PetriNetUnfolderBase]: For 740171/740171 co-relation queries the response was YES. [2024-06-20 16:55:17,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61424 conditions, 6353 events. 4143/6353 cut-off events. For 740171/740171 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35760 event pairs, 928 based on Foata normal form. 1/6352 useless extension candidates. Maximal degree in co-relation 61280. Up to 6257 conditions per place. [2024-06-20 16:55:17,570 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 32 changer transitions 0/442 dead transitions. [2024-06-20 16:55:17,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 442 transitions, 7677 flow [2024-06-20 16:55:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:55:17,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 16:55:17,572 INFO L175 Difference]: Start difference. First operand has 296 places, 410 transitions, 6649 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:55:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 442 transitions, 7677 flow [2024-06-20 16:55:19,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 442 transitions, 7536 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:19,345 INFO L231 Difference]: Finished difference. Result has 300 places, 413 transitions, 6650 flow [2024-06-20 16:55:19,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6534, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=300, PETRI_TRANSITIONS=413} [2024-06-20 16:55:19,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 16:55:19,346 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 413 transitions, 6650 flow [2024-06-20 16:55:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:19,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:19,346 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] [2024-06-20 16:55:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:55:19,346 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)] === [2024-06-20 16:55:19,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash -228397089, now seen corresponding path program 2 times [2024-06-20 16:55:19,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:19,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633224316] [2024-06-20 16:55:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:19,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633224316] [2024-06-20 16:55:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633224316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:21,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37384804] [2024-06-20 16:55:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:21,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:21,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 413 transitions, 6650 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:21,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:21,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:21,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:23,828 INFO L124 PetriNetUnfolderBase]: 4153/6367 cut-off events. [2024-06-20 16:55:23,829 INFO L125 PetriNetUnfolderBase]: For 760758/760758 co-relation queries the response was YES. [2024-06-20 16:55:23,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61763 conditions, 6367 events. 4153/6367 cut-off events. For 760758/760758 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35845 event pairs, 913 based on Foata normal form. 2/6367 useless extension candidates. Maximal degree in co-relation 61617. Up to 6218 conditions per place. [2024-06-20 16:55:23,907 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 384 selfloop transitions, 63 changer transitions 0/450 dead transitions. [2024-06-20 16:55:23,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 450 transitions, 7738 flow [2024-06-20 16:55:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:55:23,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 16:55:23,908 INFO L175 Difference]: Start difference. First operand has 300 places, 413 transitions, 6650 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:55:23,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 450 transitions, 7738 flow [2024-06-20 16:55:25,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 450 transitions, 7650 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:55:25,976 INFO L231 Difference]: Finished difference. Result has 303 places, 416 transitions, 6770 flow [2024-06-20 16:55:25,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6770, PETRI_PLACES=303, PETRI_TRANSITIONS=416} [2024-06-20 16:55:25,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-20 16:55:25,977 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 416 transitions, 6770 flow [2024-06-20 16:55:25,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:25,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:25,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:25,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:55:25,977 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:25,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:25,978 INFO L85 PathProgramCache]: Analyzing trace with hash -228407319, now seen corresponding path program 3 times [2024-06-20 16:55:25,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:25,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249411743] [2024-06-20 16:55:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:25,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:28,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249411743] [2024-06-20 16:55:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249411743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:28,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:28,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827562776] [2024-06-20 16:55:28,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:28,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:28,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 416 transitions, 6770 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:28,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:28,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:28,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:30,593 INFO L124 PetriNetUnfolderBase]: 4163/6381 cut-off events. [2024-06-20 16:55:30,593 INFO L125 PetriNetUnfolderBase]: For 779129/779129 co-relation queries the response was YES. [2024-06-20 16:55:30,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62220 conditions, 6381 events. 4163/6381 cut-off events. For 779129/779129 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35975 event pairs, 927 based on Foata normal form. 2/6381 useless extension candidates. Maximal degree in co-relation 62073. Up to 6223 conditions per place. [2024-06-20 16:55:30,683 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 382 selfloop transitions, 69 changer transitions 0/454 dead transitions. [2024-06-20 16:55:30,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 454 transitions, 7874 flow [2024-06-20 16:55:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:55:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:55:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-20 16:55:30,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 16:55:30,685 INFO L175 Difference]: Start difference. First operand has 303 places, 416 transitions, 6770 flow. Second operand 10 states and 150 transitions. [2024-06-20 16:55:30,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 454 transitions, 7874 flow [2024-06-20 16:55:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 454 transitions, 7700 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:32,310 INFO L231 Difference]: Finished difference. Result has 306 places, 419 transitions, 6826 flow [2024-06-20 16:55:32,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6826, PETRI_PLACES=306, PETRI_TRANSITIONS=419} [2024-06-20 16:55:32,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-20 16:55:32,310 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 419 transitions, 6826 flow [2024-06-20 16:55:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:55:32,311 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)] === [2024-06-20 16:55:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -228407629, now seen corresponding path program 3 times [2024-06-20 16:55:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965171386] [2024-06-20 16:55:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965171386] [2024-06-20 16:55:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965171386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509566202] [2024-06-20 16:55:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:34,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:34,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:34,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 419 transitions, 6826 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:34,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:34,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:34,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:36,946 INFO L124 PetriNetUnfolderBase]: 4171/6393 cut-off events. [2024-06-20 16:55:36,946 INFO L125 PetriNetUnfolderBase]: For 796540/796540 co-relation queries the response was YES. [2024-06-20 16:55:37,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62487 conditions, 6393 events. 4171/6393 cut-off events. For 796540/796540 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36045 event pairs, 907 based on Foata normal form. 2/6393 useless extension candidates. Maximal degree in co-relation 62339. Up to 6291 conditions per place. [2024-06-20 16:55:37,037 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 34 changer transitions 0/452 dead transitions. [2024-06-20 16:55:37,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 452 transitions, 7846 flow [2024-06-20 16:55:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-20 16:55:37,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-20 16:55:37,038 INFO L175 Difference]: Start difference. First operand has 306 places, 419 transitions, 6826 flow. Second operand 9 states and 134 transitions. [2024-06-20 16:55:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 452 transitions, 7846 flow [2024-06-20 16:55:39,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 452 transitions, 7636 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:39,395 INFO L231 Difference]: Finished difference. Result has 306 places, 421 transitions, 6727 flow [2024-06-20 16:55:39,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6616, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6727, PETRI_PLACES=306, PETRI_TRANSITIONS=421} [2024-06-20 16:55:39,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-20 16:55:39,395 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 421 transitions, 6727 flow [2024-06-20 16:55:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:39,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:39,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:55:39,395 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)] === [2024-06-20 16:55:39,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -118827403, now seen corresponding path program 3 times [2024-06-20 16:55:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:39,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167319392] [2024-06-20 16:55:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167319392] [2024-06-20 16:55:41,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167319392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:41,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:41,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93044421] [2024-06-20 16:55:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:41,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:41,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:41,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 421 transitions, 6727 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:41,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:41,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:43,798 INFO L124 PetriNetUnfolderBase]: 4176/6402 cut-off events. [2024-06-20 16:55:43,798 INFO L125 PetriNetUnfolderBase]: For 794253/794257 co-relation queries the response was YES. [2024-06-20 16:55:43,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62374 conditions, 6402 events. 4176/6402 cut-off events. For 794253/794257 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36158 event pairs, 912 based on Foata normal form. 5/6405 useless extension candidates. Maximal degree in co-relation 62225. Up to 6132 conditions per place. [2024-06-20 16:55:43,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 75 changer transitions 0/479 dead transitions. [2024-06-20 16:55:43,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 479 transitions, 8734 flow [2024-06-20 16:55:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:55:43,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:55:43,875 INFO L175 Difference]: Start difference. First operand has 306 places, 421 transitions, 6727 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:55:43,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 479 transitions, 8734 flow [2024-06-20 16:55:45,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 479 transitions, 8643 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:45,950 INFO L231 Difference]: Finished difference. Result has 310 places, 446 transitions, 7393 flow [2024-06-20 16:55:45,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7393, PETRI_PLACES=310, PETRI_TRANSITIONS=446} [2024-06-20 16:55:45,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-20 16:55:45,950 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 446 transitions, 7393 flow [2024-06-20 16:55:45,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:45,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:45,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:45,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:55:45,951 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)] === [2024-06-20 16:55:45,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1349363877, now seen corresponding path program 1 times [2024-06-20 16:55:45,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:45,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546458052] [2024-06-20 16:55:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546458052] [2024-06-20 16:55:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546458052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:48,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:48,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:48,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647302872] [2024-06-20 16:55:48,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:48,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:48,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:48,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:48,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:48,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 446 transitions, 7393 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:48,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:48,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:48,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:51,243 INFO L124 PetriNetUnfolderBase]: 4186/6416 cut-off events. [2024-06-20 16:55:51,244 INFO L125 PetriNetUnfolderBase]: For 818957/818961 co-relation queries the response was YES. [2024-06-20 16:55:51,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63621 conditions, 6416 events. 4186/6416 cut-off events. For 818957/818961 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 36195 event pairs, 943 based on Foata normal form. 2/6416 useless extension candidates. Maximal degree in co-relation 63468. Up to 6077 conditions per place. [2024-06-20 16:55:51,487 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 104 changer transitions 0/479 dead transitions. [2024-06-20 16:55:51,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 479 transitions, 8889 flow [2024-06-20 16:55:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:55:51,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:55:51,489 INFO L175 Difference]: Start difference. First operand has 310 places, 446 transitions, 7393 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:55:51,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 479 transitions, 8889 flow [2024-06-20 16:55:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 479 transitions, 8731 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 16:55:53,890 INFO L231 Difference]: Finished difference. Result has 315 places, 451 transitions, 7584 flow [2024-06-20 16:55:53,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7584, PETRI_PLACES=315, PETRI_TRANSITIONS=451} [2024-06-20 16:55:53,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 16:55:53,891 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 451 transitions, 7584 flow [2024-06-20 16:55:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:53,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:53,891 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] [2024-06-20 16:55:53,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:55:53,891 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)] === [2024-06-20 16:55:53,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:53,892 INFO L85 PathProgramCache]: Analyzing trace with hash 393888071, now seen corresponding path program 4 times [2024-06-20 16:55:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:53,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739350250] [2024-06-20 16:55:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:53,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:56,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:56,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739350250] [2024-06-20 16:55:56,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739350250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:56,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:56,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:56,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494045905] [2024-06-20 16:55:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:56,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:56,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:56,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:55:56,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 451 transitions, 7584 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:55:56,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:56,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:55:56,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:58,299 INFO L124 PetriNetUnfolderBase]: 4191/6423 cut-off events. [2024-06-20 16:55:58,299 INFO L125 PetriNetUnfolderBase]: For 834817/834821 co-relation queries the response was YES. [2024-06-20 16:55:58,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64051 conditions, 6423 events. 4191/6423 cut-off events. For 834817/834821 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 36264 event pairs, 922 based on Foata normal form. 5/6426 useless extension candidates. Maximal degree in co-relation 63896. Up to 6181 conditions per place. [2024-06-20 16:55:58,394 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 74 changer transitions 0/482 dead transitions. [2024-06-20 16:55:58,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 482 transitions, 9008 flow [2024-06-20 16:55:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:55:58,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:55:58,395 INFO L175 Difference]: Start difference. First operand has 315 places, 451 transitions, 7584 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:55:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 482 transitions, 9008 flow [2024-06-20 16:56:01,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 482 transitions, 8750 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:01,157 INFO L231 Difference]: Finished difference. Result has 319 places, 454 transitions, 7538 flow [2024-06-20 16:56:01,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7326, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7538, PETRI_PLACES=319, PETRI_TRANSITIONS=454} [2024-06-20 16:56:01,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 16:56:01,157 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 454 transitions, 7538 flow [2024-06-20 16:56:01,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:01,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:01,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:01,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:56:01,158 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)] === [2024-06-20 16:56:01,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash 52173929, now seen corresponding path program 1 times [2024-06-20 16:56:01,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:01,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991840608] [2024-06-20 16:56:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:01,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:03,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:03,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991840608] [2024-06-20 16:56:03,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991840608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:03,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:03,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:03,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848747178] [2024-06-20 16:56:03,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:03,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:03,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:03,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:03,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 454 transitions, 7538 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:03,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:03,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:03,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:06,285 INFO L124 PetriNetUnfolderBase]: 4233/6482 cut-off events. [2024-06-20 16:56:06,285 INFO L125 PetriNetUnfolderBase]: For 873342/873346 co-relation queries the response was YES. [2024-06-20 16:56:06,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65138 conditions, 6482 events. 4233/6482 cut-off events. For 873342/873346 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36563 event pairs, 935 based on Foata normal form. 2/6482 useless extension candidates. Maximal degree in co-relation 64981. Up to 5607 conditions per place. [2024-06-20 16:56:06,388 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 163 changer transitions 0/497 dead transitions. [2024-06-20 16:56:06,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 497 transitions, 9418 flow [2024-06-20 16:56:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:56:06,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:56:06,389 INFO L175 Difference]: Start difference. First operand has 319 places, 454 transitions, 7538 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:56:06,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 497 transitions, 9418 flow [2024-06-20 16:56:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 497 transitions, 9288 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:08,871 INFO L231 Difference]: Finished difference. Result has 322 places, 463 transitions, 7986 flow [2024-06-20 16:56:08,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7986, PETRI_PLACES=322, PETRI_TRANSITIONS=463} [2024-06-20 16:56:08,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-20 16:56:08,872 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 463 transitions, 7986 flow [2024-06-20 16:56:08,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:08,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:08,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:56:08,873 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)] === [2024-06-20 16:56:08,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 58840169, now seen corresponding path program 2 times [2024-06-20 16:56:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219923729] [2024-06-20 16:56:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:08,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:11,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:11,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219923729] [2024-06-20 16:56:11,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219923729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:11,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:11,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:11,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871714611] [2024-06-20 16:56:11,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:11,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:11,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 463 transitions, 7986 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:11,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:11,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:11,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:13,708 INFO L124 PetriNetUnfolderBase]: 4275/6541 cut-off events. [2024-06-20 16:56:13,709 INFO L125 PetriNetUnfolderBase]: For 914357/914361 co-relation queries the response was YES. [2024-06-20 16:56:13,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66873 conditions, 6541 events. 4275/6541 cut-off events. For 914357/914361 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36961 event pairs, 943 based on Foata normal form. 2/6541 useless extension candidates. Maximal degree in co-relation 66714. Up to 5637 conditions per place. [2024-06-20 16:56:13,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 171 changer transitions 0/500 dead transitions. [2024-06-20 16:56:13,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 500 transitions, 9805 flow [2024-06-20 16:56:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:56:13,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:56:13,795 INFO L175 Difference]: Start difference. First operand has 322 places, 463 transitions, 7986 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:56:13,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 500 transitions, 9805 flow [2024-06-20 16:56:15,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 500 transitions, 9537 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:15,834 INFO L231 Difference]: Finished difference. Result has 326 places, 469 transitions, 8239 flow [2024-06-20 16:56:15,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8239, PETRI_PLACES=326, PETRI_TRANSITIONS=469} [2024-06-20 16:56:15,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-20 16:56:15,834 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 469 transitions, 8239 flow [2024-06-20 16:56:15,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:15,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:15,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:15,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:56:15,834 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)] === [2024-06-20 16:56:15,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash -737727707, now seen corresponding path program 5 times [2024-06-20 16:56:15,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799983077] [2024-06-20 16:56:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:15,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:18,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799983077] [2024-06-20 16:56:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799983077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:18,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:18,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593196955] [2024-06-20 16:56:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:18,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:18,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 469 transitions, 8239 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:18,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:18,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:18,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:20,438 INFO L124 PetriNetUnfolderBase]: 4280/6544 cut-off events. [2024-06-20 16:56:20,439 INFO L125 PetriNetUnfolderBase]: For 929910/929910 co-relation queries the response was YES. [2024-06-20 16:56:20,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67184 conditions, 6544 events. 4280/6544 cut-off events. For 929910/929910 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36943 event pairs, 893 based on Foata normal form. 1/6543 useless extension candidates. Maximal degree in co-relation 67024. Up to 6481 conditions per place. [2024-06-20 16:56:20,520 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 25 changer transitions 0/493 dead transitions. [2024-06-20 16:56:20,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 493 transitions, 9325 flow [2024-06-20 16:56:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-20 16:56:20,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-20 16:56:20,521 INFO L175 Difference]: Start difference. First operand has 326 places, 469 transitions, 8239 flow. Second operand 8 states and 115 transitions. [2024-06-20 16:56:20,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 493 transitions, 9325 flow [2024-06-20 16:56:22,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 493 transitions, 8990 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:22,885 INFO L231 Difference]: Finished difference. Result has 330 places, 472 transitions, 8012 flow [2024-06-20 16:56:22,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8012, PETRI_PLACES=330, PETRI_TRANSITIONS=472} [2024-06-20 16:56:22,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 16:56:22,886 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 472 transitions, 8012 flow [2024-06-20 16:56:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:22,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:22,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:56:22,886 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)] === [2024-06-20 16:56:22,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash -737607365, now seen corresponding path program 3 times [2024-06-20 16:56:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:22,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248489083] [2024-06-20 16:56:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:25,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:25,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248489083] [2024-06-20 16:56:25,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248489083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:25,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:25,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843012686] [2024-06-20 16:56:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:25,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:25,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 472 transitions, 8012 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:25,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:25,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:25,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:27,889 INFO L124 PetriNetUnfolderBase]: 4274/6540 cut-off events. [2024-06-20 16:56:27,889 INFO L125 PetriNetUnfolderBase]: For 944026/944030 co-relation queries the response was YES. [2024-06-20 16:56:27,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66257 conditions, 6540 events. 4274/6540 cut-off events. For 944026/944030 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36923 event pairs, 942 based on Foata normal form. 2/6540 useless extension candidates. Maximal degree in co-relation 66096. Up to 5641 conditions per place. [2024-06-20 16:56:27,993 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 168 changer transitions 0/504 dead transitions. [2024-06-20 16:56:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 504 transitions, 9689 flow [2024-06-20 16:56:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:56:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:56:27,995 INFO L175 Difference]: Start difference. First operand has 330 places, 472 transitions, 8012 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:56:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 504 transitions, 9689 flow [2024-06-20 16:56:30,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 504 transitions, 9609 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:30,450 INFO L231 Difference]: Finished difference. Result has 332 places, 472 transitions, 8274 flow [2024-06-20 16:56:30,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7932, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8274, PETRI_PLACES=332, PETRI_TRANSITIONS=472} [2024-06-20 16:56:30,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 16:56:30,450 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 472 transitions, 8274 flow [2024-06-20 16:56:30,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:30,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:30,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:30,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:56:30,451 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)] === [2024-06-20 16:56:30,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 20197483, now seen corresponding path program 2 times [2024-06-20 16:56:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380378939] [2024-06-20 16:56:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:32,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:32,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380378939] [2024-06-20 16:56:32,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380378939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:32,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:32,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:32,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486264168] [2024-06-20 16:56:32,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:32,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:32,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:32,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:32,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 472 transitions, 8274 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:32,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:32,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:32,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:35,541 INFO L124 PetriNetUnfolderBase]: 4284/6554 cut-off events. [2024-06-20 16:56:35,541 INFO L125 PetriNetUnfolderBase]: For 968448/968452 co-relation queries the response was YES. [2024-06-20 16:56:35,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67331 conditions, 6554 events. 4284/6554 cut-off events. For 968448/968452 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37063 event pairs, 941 based on Foata normal form. 2/6554 useless extension candidates. Maximal degree in co-relation 67169. Up to 6209 conditions per place. [2024-06-20 16:56:35,637 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 112 changer transitions 0/503 dead transitions. [2024-06-20 16:56:35,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 503 transitions, 9832 flow [2024-06-20 16:56:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-20 16:56:35,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-20 16:56:35,639 INFO L175 Difference]: Start difference. First operand has 332 places, 472 transitions, 8274 flow. Second operand 9 states and 139 transitions. [2024-06-20 16:56:35,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 503 transitions, 9832 flow [2024-06-20 16:56:37,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 503 transitions, 9491 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:37,939 INFO L231 Difference]: Finished difference. Result has 336 places, 477 transitions, 8288 flow [2024-06-20 16:56:37,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7939, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8288, PETRI_PLACES=336, PETRI_TRANSITIONS=477} [2024-06-20 16:56:37,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 16:56:37,939 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 477 transitions, 8288 flow [2024-06-20 16:56:37,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:37,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:37,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:37,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:56:37,940 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)] === [2024-06-20 16:56:37,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash -737607737, now seen corresponding path program 6 times [2024-06-20 16:56:37,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:37,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480709362] [2024-06-20 16:56:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:37,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480709362] [2024-06-20 16:56:40,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480709362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:40,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:40,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803530270] [2024-06-20 16:56:40,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:40,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:40,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:40,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:40,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 477 transitions, 8288 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:40,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:40,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:40,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:42,581 INFO L124 PetriNetUnfolderBase]: 4289/6561 cut-off events. [2024-06-20 16:56:42,581 INFO L125 PetriNetUnfolderBase]: For 981716/981720 co-relation queries the response was YES. [2024-06-20 16:56:42,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67169 conditions, 6561 events. 4289/6561 cut-off events. For 981716/981720 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 37114 event pairs, 947 based on Foata normal form. 1/6560 useless extension candidates. Maximal degree in co-relation 67006. Up to 6213 conditions per place. [2024-06-20 16:56:42,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 115 changer transitions 0/503 dead transitions. [2024-06-20 16:56:42,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 503 transitions, 9767 flow [2024-06-20 16:56:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:56:42,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:56:42,673 INFO L175 Difference]: Start difference. First operand has 336 places, 477 transitions, 8288 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:56:42,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 503 transitions, 9767 flow [2024-06-20 16:56:45,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 503 transitions, 9539 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:45,340 INFO L231 Difference]: Finished difference. Result has 339 places, 480 transitions, 8360 flow [2024-06-20 16:56:45,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8060, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8360, PETRI_PLACES=339, PETRI_TRANSITIONS=480} [2024-06-20 16:56:45,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 16:56:45,341 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 480 transitions, 8360 flow [2024-06-20 16:56:45,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:56:45,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:45,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:56:45,341 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)] === [2024-06-20 16:56:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -737361287, now seen corresponding path program 1 times [2024-06-20 16:56:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94455381] [2024-06-20 16:56:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:45,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:47,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:47,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94455381] [2024-06-20 16:56:47,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94455381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:47,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:47,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:47,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129874512] [2024-06-20 16:56:47,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:47,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:47,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:47,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:47,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 480 transitions, 8360 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:47,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:47,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:47,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:50,510 INFO L124 PetriNetUnfolderBase]: 4297/6569 cut-off events. [2024-06-20 16:56:50,510 INFO L125 PetriNetUnfolderBase]: For 1005944/1005944 co-relation queries the response was YES. [2024-06-20 16:56:50,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67522 conditions, 6569 events. 4297/6569 cut-off events. For 1005944/1005944 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 37129 event pairs, 891 based on Foata normal form. 2/6569 useless extension candidates. Maximal degree in co-relation 67357. Up to 6480 conditions per place. [2024-06-20 16:56:50,593 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 462 selfloop transitions, 39 changer transitions 0/504 dead transitions. [2024-06-20 16:56:50,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 504 transitions, 9488 flow [2024-06-20 16:56:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 16:56:50,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 16:56:50,594 INFO L175 Difference]: Start difference. First operand has 339 places, 480 transitions, 8360 flow. Second operand 8 states and 120 transitions. [2024-06-20 16:56:50,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 504 transitions, 9488 flow [2024-06-20 16:56:52,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 504 transitions, 9298 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:52,377 INFO L231 Difference]: Finished difference. Result has 343 places, 482 transitions, 8321 flow [2024-06-20 16:56:52,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8321, PETRI_PLACES=343, PETRI_TRANSITIONS=482} [2024-06-20 16:56:52,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-20 16:56:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 482 transitions, 8321 flow [2024-06-20 16:56:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:52,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:52,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:56:52,379 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)] === [2024-06-20 16:56:52,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash 58848663, now seen corresponding path program 1 times [2024-06-20 16:56:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771839711] [2024-06-20 16:56:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:54,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:54,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771839711] [2024-06-20 16:56:54,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771839711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:54,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:54,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:54,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787650605] [2024-06-20 16:56:54,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:54,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:54,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:54,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:54,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:54,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:56:54,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 482 transitions, 8321 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:54,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:54,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:56:54,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:57,158 INFO L124 PetriNetUnfolderBase]: 4302/6576 cut-off events. [2024-06-20 16:56:57,158 INFO L125 PetriNetUnfolderBase]: For 1019443/1019443 co-relation queries the response was YES. [2024-06-20 16:56:57,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67693 conditions, 6576 events. 4302/6576 cut-off events. For 1019443/1019443 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 37113 event pairs, 884 based on Foata normal form. 1/6575 useless extension candidates. Maximal degree in co-relation 67527. Up to 6484 conditions per place. [2024-06-20 16:56:57,262 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 45 changer transitions 0/507 dead transitions. [2024-06-20 16:56:57,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 507 transitions, 9463 flow [2024-06-20 16:56:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 16:56:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 16:56:57,265 INFO L175 Difference]: Start difference. First operand has 343 places, 482 transitions, 8321 flow. Second operand 8 states and 121 transitions. [2024-06-20 16:56:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 507 transitions, 9463 flow [2024-06-20 16:56:59,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 507 transitions, 9334 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:59,914 INFO L231 Difference]: Finished difference. Result has 345 places, 485 transitions, 8366 flow [2024-06-20 16:56:59,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8366, PETRI_PLACES=345, PETRI_TRANSITIONS=485} [2024-06-20 16:56:59,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-20 16:56:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 485 transitions, 8366 flow [2024-06-20 16:56:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:59,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:59,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:59,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:56:59,915 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)] === [2024-06-20 16:56:59,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash 58836201, now seen corresponding path program 4 times [2024-06-20 16:56:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068893039] [2024-06-20 16:56:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:02,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:02,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068893039] [2024-06-20 16:57:02,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068893039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:02,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:02,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:02,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373568936] [2024-06-20 16:57:02,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:02,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:02,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:02,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:02,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 485 transitions, 8366 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:02,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:02,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:02,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:04,570 INFO L124 PetriNetUnfolderBase]: 4312/6590 cut-off events. [2024-06-20 16:57:04,570 INFO L125 PetriNetUnfolderBase]: For 1045381/1045381 co-relation queries the response was YES. [2024-06-20 16:57:04,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68108 conditions, 6590 events. 4312/6590 cut-off events. For 1045381/1045381 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 37227 event pairs, 897 based on Foata normal form. 2/6590 useless extension candidates. Maximal degree in co-relation 67941. Up to 6507 conditions per place. [2024-06-20 16:57:04,664 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 37 changer transitions 0/512 dead transitions. [2024-06-20 16:57:04,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 512 transitions, 9540 flow [2024-06-20 16:57:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-20 16:57:04,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-20 16:57:04,665 INFO L175 Difference]: Start difference. First operand has 345 places, 485 transitions, 8366 flow. Second operand 9 states and 129 transitions. [2024-06-20 16:57:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 512 transitions, 9540 flow [2024-06-20 16:57:07,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 512 transitions, 9414 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:07,136 INFO L231 Difference]: Finished difference. Result has 347 places, 488 transitions, 8403 flow [2024-06-20 16:57:07,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8403, PETRI_PLACES=347, PETRI_TRANSITIONS=488} [2024-06-20 16:57:07,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-20 16:57:07,137 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 488 transitions, 8403 flow [2024-06-20 16:57:07,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:07,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:07,137 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] [2024-06-20 16:57:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:57:07,138 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)] === [2024-06-20 16:57:07,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash 450738831, now seen corresponding path program 5 times [2024-06-20 16:57:07,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:07,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499890886] [2024-06-20 16:57:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:07,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:09,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:09,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499890886] [2024-06-20 16:57:09,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499890886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:09,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:09,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232014445] [2024-06-20 16:57:09,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:09,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:09,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:09,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:09,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 488 transitions, 8403 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:09,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:09,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:09,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:12,050 INFO L124 PetriNetUnfolderBase]: 4322/6604 cut-off events. [2024-06-20 16:57:12,050 INFO L125 PetriNetUnfolderBase]: For 1046948/1046948 co-relation queries the response was YES. [2024-06-20 16:57:12,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68245 conditions, 6604 events. 4322/6604 cut-off events. For 1046948/1046948 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37275 event pairs, 893 based on Foata normal form. 2/6604 useless extension candidates. Maximal degree in co-relation 68078. Up to 6499 conditions per place. [2024-06-20 16:57:12,137 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 48 changer transitions 0/518 dead transitions. [2024-06-20 16:57:12,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 518 transitions, 9617 flow [2024-06-20 16:57:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-20 16:57:12,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-06-20 16:57:12,138 INFO L175 Difference]: Start difference. First operand has 347 places, 488 transitions, 8403 flow. Second operand 10 states and 144 transitions. [2024-06-20 16:57:12,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 518 transitions, 9617 flow [2024-06-20 16:57:14,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 518 transitions, 9490 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:14,862 INFO L231 Difference]: Finished difference. Result has 350 places, 491 transitions, 8467 flow [2024-06-20 16:57:14,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8467, PETRI_PLACES=350, PETRI_TRANSITIONS=491} [2024-06-20 16:57:14,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-20 16:57:14,862 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 491 transitions, 8467 flow [2024-06-20 16:57:14,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:14,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:14,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:14,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:57:14,862 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)] === [2024-06-20 16:57:14,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash 450738521, now seen corresponding path program 4 times [2024-06-20 16:57:14,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:14,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063792610] [2024-06-20 16:57:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:14,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063792610] [2024-06-20 16:57:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063792610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:17,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706284510] [2024-06-20 16:57:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:17,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:17,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 491 transitions, 8467 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:17,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:17,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:17,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:19,423 INFO L124 PetriNetUnfolderBase]: 4330/6616 cut-off events. [2024-06-20 16:57:19,423 INFO L125 PetriNetUnfolderBase]: For 1065650/1065650 co-relation queries the response was YES. [2024-06-20 16:57:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68520 conditions, 6616 events. 4330/6616 cut-off events. For 1065650/1065650 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37320 event pairs, 898 based on Foata normal form. 2/6616 useless extension candidates. Maximal degree in co-relation 68352. Up to 6547 conditions per place. [2024-06-20 16:57:19,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 27 changer transitions 0/516 dead transitions. [2024-06-20 16:57:19,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 516 transitions, 9595 flow [2024-06-20 16:57:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-20 16:57:19,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2024-06-20 16:57:19,530 INFO L175 Difference]: Start difference. First operand has 350 places, 491 transitions, 8467 flow. Second operand 9 states and 125 transitions. [2024-06-20 16:57:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 516 transitions, 9595 flow [2024-06-20 16:57:22,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 516 transitions, 9440 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 16:57:22,454 INFO L231 Difference]: Finished difference. Result has 351 places, 493 transitions, 8413 flow [2024-06-20 16:57:22,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8312, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8413, PETRI_PLACES=351, PETRI_TRANSITIONS=493} [2024-06-20 16:57:22,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-20 16:57:22,455 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 493 transitions, 8413 flow [2024-06-20 16:57:22,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:22,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:22,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:57:22,456 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)] === [2024-06-20 16:57:22,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1778481825, now seen corresponding path program 3 times [2024-06-20 16:57:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:22,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255992641] [2024-06-20 16:57:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255992641] [2024-06-20 16:57:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255992641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404105982] [2024-06-20 16:57:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:24,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:24,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:24,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 493 transitions, 8413 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:24,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:24,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:24,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:27,597 INFO L124 PetriNetUnfolderBase]: 4324/6610 cut-off events. [2024-06-20 16:57:27,597 INFO L125 PetriNetUnfolderBase]: For 1078924/1078950 co-relation queries the response was YES. [2024-06-20 16:57:27,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68353 conditions, 6610 events. 4324/6610 cut-off events. For 1078924/1078950 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37302 event pairs, 892 based on Foata normal form. 20/6626 useless extension candidates. Maximal degree in co-relation 68184. Up to 6270 conditions per place. [2024-06-20 16:57:27,697 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 108 changer transitions 0/518 dead transitions. [2024-06-20 16:57:27,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 518 transitions, 9712 flow [2024-06-20 16:57:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:57:27,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:57:27,698 INFO L175 Difference]: Start difference. First operand has 351 places, 493 transitions, 8413 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:57:27,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 518 transitions, 9712 flow [2024-06-20 16:57:31,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 518 transitions, 9599 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:31,823 INFO L231 Difference]: Finished difference. Result has 352 places, 493 transitions, 8525 flow [2024-06-20 16:57:31,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8525, PETRI_PLACES=352, PETRI_TRANSITIONS=493} [2024-06-20 16:57:31,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 16:57:31,824 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 493 transitions, 8525 flow [2024-06-20 16:57:31,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:31,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:31,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:31,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:57:31,825 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)] === [2024-06-20 16:57:31,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2017989561, now seen corresponding path program 7 times [2024-06-20 16:57:31,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:31,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521122062] [2024-06-20 16:57:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:34,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521122062] [2024-06-20 16:57:34,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521122062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:34,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:34,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:34,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386849121] [2024-06-20 16:57:34,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:34,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:34,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:34,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 493 transitions, 8525 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:34,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:34,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:34,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:36,444 INFO L124 PetriNetUnfolderBase]: 4355/6653 cut-off events. [2024-06-20 16:57:36,444 INFO L125 PetriNetUnfolderBase]: For 1116178/1116204 co-relation queries the response was YES. [2024-06-20 16:57:36,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69393 conditions, 6653 events. 4355/6653 cut-off events. For 1116178/1116204 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 37573 event pairs, 901 based on Foata normal form. 21/6670 useless extension candidates. Maximal degree in co-relation 69223. Up to 6211 conditions per place. [2024-06-20 16:57:36,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 120 changer transitions 0/534 dead transitions. [2024-06-20 16:57:36,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 534 transitions, 10300 flow [2024-06-20 16:57:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:57:36,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:57:36,538 INFO L175 Difference]: Start difference. First operand has 352 places, 493 transitions, 8525 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:57:36,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 534 transitions, 10300 flow [2024-06-20 16:57:39,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 534 transitions, 10064 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:40,005 INFO L231 Difference]: Finished difference. Result has 355 places, 504 transitions, 8809 flow [2024-06-20 16:57:40,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8289, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8809, PETRI_PLACES=355, PETRI_TRANSITIONS=504} [2024-06-20 16:57:40,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-20 16:57:40,006 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 504 transitions, 8809 flow [2024-06-20 16:57:40,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:40,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:40,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:57:40,007 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)] === [2024-06-20 16:57:40,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2017691031, now seen corresponding path program 8 times [2024-06-20 16:57:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:40,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726558480] [2024-06-20 16:57:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:40,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:42,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:42,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726558480] [2024-06-20 16:57:42,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726558480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:42,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:42,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488137104] [2024-06-20 16:57:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:42,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:42,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:42,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:42,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:42,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 504 transitions, 8809 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:42,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:42,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:42,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:45,382 INFO L124 PetriNetUnfolderBase]: 4449/6784 cut-off events. [2024-06-20 16:57:45,382 INFO L125 PetriNetUnfolderBase]: For 1191571/1191597 co-relation queries the response was YES. [2024-06-20 16:57:45,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72408 conditions, 6784 events. 4449/6784 cut-off events. For 1191571/1191597 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 38384 event pairs, 830 based on Foata normal form. 22/6802 useless extension candidates. Maximal degree in co-relation 72236. Up to 5686 conditions per place. [2024-06-20 16:57:45,488 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 345 selfloop transitions, 226 changer transitions 0/574 dead transitions. [2024-06-20 16:57:45,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 574 transitions, 11167 flow [2024-06-20 16:57:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:57:45,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-20 16:57:45,490 INFO L175 Difference]: Start difference. First operand has 355 places, 504 transitions, 8809 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:57:45,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 574 transitions, 11167 flow [2024-06-20 16:57:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 574 transitions, 10852 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-20 16:57:49,696 INFO L231 Difference]: Finished difference. Result has 362 places, 531 transitions, 9645 flow [2024-06-20 16:57:49,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8580, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9645, PETRI_PLACES=362, PETRI_TRANSITIONS=531} [2024-06-20 16:57:49,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-20 16:57:49,697 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 531 transitions, 9645 flow [2024-06-20 16:57:49,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:49,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:49,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:49,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:57:49,697 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)] === [2024-06-20 16:57:49,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:49,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1693829621, now seen corresponding path program 4 times [2024-06-20 16:57:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:49,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212710409] [2024-06-20 16:57:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:52,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:52,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212710409] [2024-06-20 16:57:52,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212710409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:52,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:52,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:57:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657964826] [2024-06-20 16:57:52,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:52,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:57:52,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:57:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:57:52,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:57:52,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 531 transitions, 9645 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:52,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:52,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:57:52,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:54,906 INFO L124 PetriNetUnfolderBase]: 4431/6760 cut-off events. [2024-06-20 16:57:54,906 INFO L125 PetriNetUnfolderBase]: For 1205271/1205297 co-relation queries the response was YES. [2024-06-20 16:57:54,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74165 conditions, 6760 events. 4431/6760 cut-off events. For 1205271/1205297 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 38176 event pairs, 848 based on Foata normal form. 24/6780 useless extension candidates. Maximal degree in co-relation 73990. Up to 5873 conditions per place. [2024-06-20 16:57:55,006 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 396 selfloop transitions, 163 changer transitions 0/562 dead transitions. [2024-06-20 16:57:55,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 562 transitions, 11306 flow [2024-06-20 16:57:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:57:55,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:57:55,007 INFO L175 Difference]: Start difference. First operand has 362 places, 531 transitions, 9645 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:57:55,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 562 transitions, 11306 flow [2024-06-20 16:57:58,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 562 transitions, 11055 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-20 16:57:58,579 INFO L231 Difference]: Finished difference. Result has 366 places, 531 transitions, 9734 flow [2024-06-20 16:57:58,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9400, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9734, PETRI_PLACES=366, PETRI_TRANSITIONS=531} [2024-06-20 16:57:58,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-20 16:57:58,579 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 531 transitions, 9734 flow [2024-06-20 16:57:58,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:57:58,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:58,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:58,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:57:58,580 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)] === [2024-06-20 16:57:58,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1693829807, now seen corresponding path program 4 times [2024-06-20 16:57:58,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:58,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521849069] [2024-06-20 16:57:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:58,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:01,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:01,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521849069] [2024-06-20 16:58:01,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521849069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:01,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:01,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:01,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64439691] [2024-06-20 16:58:01,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:01,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:01,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:01,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 531 transitions, 9734 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:01,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:03,788 INFO L124 PetriNetUnfolderBase]: 4425/6752 cut-off events. [2024-06-20 16:58:03,788 INFO L125 PetriNetUnfolderBase]: For 1199867/1199893 co-relation queries the response was YES. [2024-06-20 16:58:03,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74166 conditions, 6752 events. 4425/6752 cut-off events. For 1199867/1199893 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 38230 event pairs, 883 based on Foata normal form. 20/6768 useless extension candidates. Maximal degree in co-relation 73989. Up to 6415 conditions per place. [2024-06-20 16:58:03,886 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 104 changer transitions 0/555 dead transitions. [2024-06-20 16:58:03,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 555 transitions, 10919 flow [2024-06-20 16:58:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:58:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:58:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:58:03,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 16:58:03,887 INFO L175 Difference]: Start difference. First operand has 366 places, 531 transitions, 9734 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:58:03,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 555 transitions, 10919 flow [2024-06-20 16:58:07,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 555 transitions, 10278 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-20 16:58:07,331 INFO L231 Difference]: Finished difference. Result has 364 places, 531 transitions, 9309 flow [2024-06-20 16:58:07,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9093, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9309, PETRI_PLACES=364, PETRI_TRANSITIONS=531} [2024-06-20 16:58:07,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-20 16:58:07,331 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 531 transitions, 9309 flow [2024-06-20 16:58:07,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:58:07,332 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)] === [2024-06-20 16:58:07,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1339566581, now seen corresponding path program 5 times [2024-06-20 16:58:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412138011] [2024-06-20 16:58:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:09,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:09,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412138011] [2024-06-20 16:58:09,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412138011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:09,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:09,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751229421] [2024-06-20 16:58:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:09,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:09,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:09,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 531 transitions, 9309 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:09,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:09,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:09,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:12,410 INFO L124 PetriNetUnfolderBase]: 4439/6771 cut-off events. [2024-06-20 16:58:12,410 INFO L125 PetriNetUnfolderBase]: For 1222905/1222905 co-relation queries the response was YES. [2024-06-20 16:58:12,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73734 conditions, 6771 events. 4439/6771 cut-off events. For 1222905/1222905 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 38302 event pairs, 859 based on Foata normal form. 6/6775 useless extension candidates. Maximal degree in co-relation 73556. Up to 6519 conditions per place. [2024-06-20 16:58:12,503 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 57 changer transitions 0/565 dead transitions. [2024-06-20 16:58:12,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 565 transitions, 11097 flow [2024-06-20 16:58:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:58:12,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 16:58:12,505 INFO L175 Difference]: Start difference. First operand has 364 places, 531 transitions, 9309 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:58:12,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 565 transitions, 11097 flow [2024-06-20 16:58:15,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 565 transitions, 10820 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:58:15,060 INFO L231 Difference]: Finished difference. Result has 365 places, 534 transitions, 9245 flow [2024-06-20 16:58:15,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9035, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9245, PETRI_PLACES=365, PETRI_TRANSITIONS=534} [2024-06-20 16:58:15,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 16:58:15,060 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 534 transitions, 9245 flow [2024-06-20 16:58:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:15,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:15,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:58:15,061 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)] === [2024-06-20 16:58:15,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:15,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1339566953, now seen corresponding path program 9 times [2024-06-20 16:58:15,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:15,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506903243] [2024-06-20 16:58:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:15,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:17,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506903243] [2024-06-20 16:58:17,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506903243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:17,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:17,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:17,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843808272] [2024-06-20 16:58:17,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:17,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:17,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:17,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 534 transitions, 9245 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:17,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:17,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:17,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:19,968 INFO L124 PetriNetUnfolderBase]: 4484/6834 cut-off events. [2024-06-20 16:58:19,968 INFO L125 PetriNetUnfolderBase]: For 1259146/1259146 co-relation queries the response was YES. [2024-06-20 16:58:20,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74592 conditions, 6834 events. 4484/6834 cut-off events. For 1259146/1259146 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38657 event pairs, 870 based on Foata normal form. 9/6841 useless extension candidates. Maximal degree in co-relation 74414. Up to 6729 conditions per place. [2024-06-20 16:58:20,076 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 532 selfloop transitions, 50 changer transitions 0/585 dead transitions. [2024-06-20 16:58:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 585 transitions, 11064 flow [2024-06-20 16:58:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 16:58:20,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-20 16:58:20,078 INFO L175 Difference]: Start difference. First operand has 365 places, 534 transitions, 9245 flow. Second operand 9 states and 132 transitions. [2024-06-20 16:58:20,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 585 transitions, 11064 flow [2024-06-20 16:58:25,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 585 transitions, 10884 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:25,238 INFO L231 Difference]: Finished difference. Result has 371 places, 563 transitions, 9831 flow [2024-06-20 16:58:25,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9081, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9831, PETRI_PLACES=371, PETRI_TRANSITIONS=563} [2024-06-20 16:58:25,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-20 16:58:25,238 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 563 transitions, 9831 flow [2024-06-20 16:58:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:25,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:25,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:58:25,239 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)] === [2024-06-20 16:58:25,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -386229613, now seen corresponding path program 10 times [2024-06-20 16:58:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:25,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47062896] [2024-06-20 16:58:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:27,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:27,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47062896] [2024-06-20 16:58:27,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47062896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:27,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:27,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:27,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288928249] [2024-06-20 16:58:27,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:27,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:27,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:27,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 563 transitions, 9831 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:27,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:27,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:27,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:30,304 INFO L124 PetriNetUnfolderBase]: 4491/6843 cut-off events. [2024-06-20 16:58:30,304 INFO L125 PetriNetUnfolderBase]: For 1251446/1251446 co-relation queries the response was YES. [2024-06-20 16:58:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76162 conditions, 6843 events. 4491/6843 cut-off events. For 1251446/1251446 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 38715 event pairs, 866 based on Foata normal form. 3/6844 useless extension candidates. Maximal degree in co-relation 75979. Up to 6727 conditions per place. [2024-06-20 16:58:30,409 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 556 selfloop transitions, 41 changer transitions 0/600 dead transitions. [2024-06-20 16:58:30,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 600 transitions, 11230 flow [2024-06-20 16:58:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:58:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:58:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:58:30,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:58:30,410 INFO L175 Difference]: Start difference. First operand has 371 places, 563 transitions, 9831 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:58:30,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 600 transitions, 11230 flow [2024-06-20 16:58:34,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 600 transitions, 10974 flow, removed 123 selfloop flow, removed 2 redundant places. [2024-06-20 16:58:34,535 INFO L231 Difference]: Finished difference. Result has 376 places, 566 transitions, 9764 flow [2024-06-20 16:58:34,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9575, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9764, PETRI_PLACES=376, PETRI_TRANSITIONS=566} [2024-06-20 16:58:34,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-20 16:58:34,535 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 566 transitions, 9764 flow [2024-06-20 16:58:34,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:34,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:34,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:34,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:58:34,536 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)] === [2024-06-20 16:58:34,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -208978123, now seen corresponding path program 11 times [2024-06-20 16:58:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:34,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138103410] [2024-06-20 16:58:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:34,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138103410] [2024-06-20 16:58:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138103410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:36,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:36,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905136493] [2024-06-20 16:58:36,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:36,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:36,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:36,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:36,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 566 transitions, 9764 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:36,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:36,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:36,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:39,863 INFO L124 PetriNetUnfolderBase]: 4538/6909 cut-off events. [2024-06-20 16:58:39,863 INFO L125 PetriNetUnfolderBase]: For 1311783/1311783 co-relation queries the response was YES. [2024-06-20 16:58:39,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77090 conditions, 6909 events. 4538/6909 cut-off events. For 1311783/1311783 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 39149 event pairs, 864 based on Foata normal form. 11/6918 useless extension candidates. Maximal degree in co-relation 76905. Up to 6457 conditions per place. [2024-06-20 16:58:39,964 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 496 selfloop transitions, 141 changer transitions 0/640 dead transitions. [2024-06-20 16:58:39,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 640 transitions, 11924 flow [2024-06-20 16:58:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:58:39,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:58:39,966 INFO L175 Difference]: Start difference. First operand has 376 places, 566 transitions, 9764 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:58:39,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 640 transitions, 11924 flow [2024-06-20 16:58:44,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 640 transitions, 11779 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:44,875 INFO L231 Difference]: Finished difference. Result has 382 places, 593 transitions, 10755 flow [2024-06-20 16:58:44,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9619, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10755, PETRI_PLACES=382, PETRI_TRANSITIONS=593} [2024-06-20 16:58:44,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-20 16:58:44,875 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 593 transitions, 10755 flow [2024-06-20 16:58:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:44,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:44,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:58:44,876 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)] === [2024-06-20 16:58:44,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 107089479, now seen corresponding path program 12 times [2024-06-20 16:58:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:44,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353760718] [2024-06-20 16:58:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:47,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353760718] [2024-06-20 16:58:47,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353760718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:47,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:47,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:47,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458433560] [2024-06-20 16:58:47,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:47,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:47,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:47,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:47,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:47,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:47,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 593 transitions, 10755 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:47,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:47,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:47,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:49,797 INFO L124 PetriNetUnfolderBase]: 4545/6919 cut-off events. [2024-06-20 16:58:49,798 INFO L125 PetriNetUnfolderBase]: For 1295524/1295526 co-relation queries the response was YES. [2024-06-20 16:58:49,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79053 conditions, 6919 events. 4545/6919 cut-off events. For 1295524/1295526 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 39184 event pairs, 883 based on Foata normal form. 5/6922 useless extension candidates. Maximal degree in co-relation 78865. Up to 6653 conditions per place. [2024-06-20 16:58:49,895 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 542 selfloop transitions, 99 changer transitions 0/644 dead transitions. [2024-06-20 16:58:49,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 644 transitions, 12511 flow [2024-06-20 16:58:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:58:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:58:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:58:49,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:58:49,896 INFO L175 Difference]: Start difference. First operand has 382 places, 593 transitions, 10755 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:58:49,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 644 transitions, 12511 flow [2024-06-20 16:58:55,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 644 transitions, 12157 flow, removed 108 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:55,301 INFO L231 Difference]: Finished difference. Result has 388 places, 609 transitions, 11109 flow [2024-06-20 16:58:55,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10427, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11109, PETRI_PLACES=388, PETRI_TRANSITIONS=609} [2024-06-20 16:58:55,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-20 16:58:55,301 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 609 transitions, 11109 flow [2024-06-20 16:58:55,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:55,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:55,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:55,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:58:55,302 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)] === [2024-06-20 16:58:55,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash -385872121, now seen corresponding path program 6 times [2024-06-20 16:58:55,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:55,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586193501] [2024-06-20 16:58:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:55,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:57,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586193501] [2024-06-20 16:58:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586193501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749851220] [2024-06-20 16:58:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:57,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:58:57,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 609 transitions, 11109 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:58:57,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:57,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:58:57,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:00,419 INFO L124 PetriNetUnfolderBase]: 4587/6979 cut-off events. [2024-06-20 16:59:00,419 INFO L125 PetriNetUnfolderBase]: For 1316038/1316040 co-relation queries the response was YES. [2024-06-20 16:59:00,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80214 conditions, 6979 events. 4587/6979 cut-off events. For 1316038/1316040 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 39505 event pairs, 855 based on Foata normal form. 4/6981 useless extension candidates. Maximal degree in co-relation 80022. Up to 6296 conditions per place. [2024-06-20 16:59:00,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 483 selfloop transitions, 163 changer transitions 0/649 dead transitions. [2024-06-20 16:59:00,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 649 transitions, 13395 flow [2024-06-20 16:59:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:59:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:59:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:59:00,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:59:00,541 INFO L175 Difference]: Start difference. First operand has 388 places, 609 transitions, 11109 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:59:00,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 649 transitions, 13395 flow [2024-06-20 16:59:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 649 transitions, 13218 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-20 16:59:06,882 INFO L231 Difference]: Finished difference. Result has 393 places, 615 transitions, 11449 flow [2024-06-20 16:59:06,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10938, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11449, PETRI_PLACES=393, PETRI_TRANSITIONS=615} [2024-06-20 16:59:06,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-20 16:59:06,883 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 615 transitions, 11449 flow [2024-06-20 16:59:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:59:06,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:06,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:06,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:59:06,883 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)] === [2024-06-20 16:59:06,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2063852859, now seen corresponding path program 7 times [2024-06-20 16:59:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629654241] [2024-06-20 16:59:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:09,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:09,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629654241] [2024-06-20 16:59:09,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629654241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:09,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:09,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:59:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700543247] [2024-06-20 16:59:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:59:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:59:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:59:09,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:59:09,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 615 transitions, 11449 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:59:09,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:09,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:59:09,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:12,088 INFO L124 PetriNetUnfolderBase]: 4581/6970 cut-off events. [2024-06-20 16:59:12,088 INFO L125 PetriNetUnfolderBase]: For 1307790/1307792 co-relation queries the response was YES. [2024-06-20 16:59:12,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80427 conditions, 6970 events. 4581/6970 cut-off events. For 1307790/1307792 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 39469 event pairs, 854 based on Foata normal form. 4/6972 useless extension candidates. Maximal degree in co-relation 80234. Up to 6293 conditions per place. [2024-06-20 16:59:12,223 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 486 selfloop transitions, 163 changer transitions 0/652 dead transitions. [2024-06-20 16:59:12,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 652 transitions, 13355 flow [2024-06-20 16:59:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:59:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:59:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:59:12,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:59:12,224 INFO L175 Difference]: Start difference. First operand has 393 places, 615 transitions, 11449 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:59:12,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 652 transitions, 13355 flow [2024-06-20 16:59:16,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 652 transitions, 12922 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-20 16:59:16,666 INFO L231 Difference]: Finished difference. Result has 396 places, 615 transitions, 11348 flow [2024-06-20 16:59:16,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11016, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11348, PETRI_PLACES=396, PETRI_TRANSITIONS=615} [2024-06-20 16:59:16,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-20 16:59:16,667 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 615 transitions, 11348 flow [2024-06-20 16:59:16,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:59:16,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:16,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:16,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:59:16,667 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)] === [2024-06-20 16:59:16,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1085146811, now seen corresponding path program 8 times [2024-06-20 16:59:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228061402] [2024-06-20 16:59:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228061402] [2024-06-20 16:59:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228061402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:19,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:19,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:59:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624317176] [2024-06-20 16:59:19,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:59:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:59:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:59:19,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:59:19,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 615 transitions, 11348 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:59:19,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:19,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:59:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:22,177 INFO L124 PetriNetUnfolderBase]: 4563/6945 cut-off events. [2024-06-20 16:59:22,177 INFO L125 PetriNetUnfolderBase]: For 1315724/1315724 co-relation queries the response was YES. [2024-06-20 16:59:22,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79351 conditions, 6945 events. 4563/6945 cut-off events. For 1315724/1315724 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 39333 event pairs, 839 based on Foata normal form. 6/6949 useless extension candidates. Maximal degree in co-relation 79158. Up to 6282 conditions per place. [2024-06-20 16:59:22,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 162 changer transitions 0/657 dead transitions. [2024-06-20 16:59:22,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 657 transitions, 13284 flow [2024-06-20 16:59:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:59:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:59:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:59:22,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 16:59:22,293 INFO L175 Difference]: Start difference. First operand has 396 places, 615 transitions, 11348 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:59:22,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 657 transitions, 13284 flow [2024-06-20 16:59:26,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 657 transitions, 12885 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 16:59:26,973 INFO L231 Difference]: Finished difference. Result has 396 places, 615 transitions, 11287 flow [2024-06-20 16:59:26,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10949, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11287, PETRI_PLACES=396, PETRI_TRANSITIONS=615} [2024-06-20 16:59:26,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-20 16:59:26,973 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 615 transitions, 11287 flow [2024-06-20 16:59:26,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-20 16:59:26,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:26,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:26,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:59:26,974 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)] === [2024-06-20 16:59:26,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash 27443253, now seen corresponding path program 2 times [2024-06-20 16:59:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:26,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558132586] [2024-06-20 16:59:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:26,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558132586] [2024-06-20 16:59:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558132586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:29,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:29,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671877964] [2024-06-20 16:59:29,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:29,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:29,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:59:29,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 615 transitions, 11287 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:29,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:29,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:59:29,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:31,924 INFO L124 PetriNetUnfolderBase]: 4568/6952 cut-off events. [2024-06-20 16:59:31,924 INFO L125 PetriNetUnfolderBase]: For 1310330/1310330 co-relation queries the response was YES. [2024-06-20 16:59:32,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79575 conditions, 6952 events. 4568/6952 cut-off events. For 1310330/1310330 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 39393 event pairs, 877 based on Foata normal form. 1/6951 useless extension candidates. Maximal degree in co-relation 79381. Up to 6847 conditions per place. [2024-06-20 16:59:32,229 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 604 selfloop transitions, 39 changer transitions 0/646 dead transitions. [2024-06-20 16:59:32,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 646 transitions, 12751 flow [2024-06-20 16:59:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:59:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:59:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:59:32,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:59:32,230 INFO L175 Difference]: Start difference. First operand has 396 places, 615 transitions, 11287 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:59:32,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 646 transitions, 12751 flow [2024-06-20 16:59:37,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 646 transitions, 12186 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-20 16:59:37,625 INFO L231 Difference]: Finished difference. Result has 391 places, 618 transitions, 10914 flow [2024-06-20 16:59:37,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10722, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10914, PETRI_PLACES=391, PETRI_TRANSITIONS=618} [2024-06-20 16:59:37,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-20 16:59:37,626 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 618 transitions, 10914 flow [2024-06-20 16:59:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:37,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:37,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:37,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:59:37,627 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)] === [2024-06-20 16:59:37,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2076134997, now seen corresponding path program 2 times [2024-06-20 16:59:37,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:37,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225995283] [2024-06-20 16:59:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225995283] [2024-06-20 16:59:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225995283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:40,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:40,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462887247] [2024-06-20 16:59:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:40,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:40,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:59:40,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 618 transitions, 10914 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:40,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:40,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:59:40,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:42,700 INFO L124 PetriNetUnfolderBase]: 4589/6983 cut-off events. [2024-06-20 16:59:42,700 INFO L125 PetriNetUnfolderBase]: For 1325895/1325895 co-relation queries the response was YES. [2024-06-20 16:59:42,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79551 conditions, 6983 events. 4589/6983 cut-off events. For 1325895/1325895 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 39526 event pairs, 890 based on Foata normal form. 2/6983 useless extension candidates. Maximal degree in co-relation 79357. Up to 6894 conditions per place. [2024-06-20 16:59:42,823 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 611 selfloop transitions, 31 changer transitions 0/645 dead transitions. [2024-06-20 16:59:42,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 645 transitions, 12614 flow [2024-06-20 16:59:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:59:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:59:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 16:59:42,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-20 16:59:42,825 INFO L175 Difference]: Start difference. First operand has 391 places, 618 transitions, 10914 flow. Second operand 7 states and 111 transitions. [2024-06-20 16:59:42,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 645 transitions, 12614 flow [2024-06-20 16:59:49,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 645 transitions, 12517 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 16:59:49,397 INFO L231 Difference]: Finished difference. Result has 394 places, 622 transitions, 11030 flow [2024-06-20 16:59:49,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10817, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11030, PETRI_PLACES=394, PETRI_TRANSITIONS=622} [2024-06-20 16:59:49,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 16:59:49,397 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 622 transitions, 11030 flow [2024-06-20 16:59:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:49,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:49,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:49,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:59:49,398 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)] === [2024-06-20 16:59:49,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 27443687, now seen corresponding path program 3 times [2024-06-20 16:59:49,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068090310] [2024-06-20 16:59:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:51,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:51,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068090310] [2024-06-20 16:59:51,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068090310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:51,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:51,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:51,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135747730] [2024-06-20 16:59:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:51,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:51,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:52,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 16:59:52,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 622 transitions, 11030 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:52,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:52,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 16:59:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:54,712 INFO L124 PetriNetUnfolderBase]: 4584/6976 cut-off events. [2024-06-20 16:59:54,712 INFO L125 PetriNetUnfolderBase]: For 1338766/1338766 co-relation queries the response was YES. [2024-06-20 16:59:54,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79560 conditions, 6976 events. 4584/6976 cut-off events. For 1338766/1338766 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 39496 event pairs, 891 based on Foata normal form. 2/6976 useless extension candidates. Maximal degree in co-relation 79365. Up to 6904 conditions per place. [2024-06-20 16:59:54,821 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 612 selfloop transitions, 27 changer transitions 0/642 dead transitions. [2024-06-20 16:59:54,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 642 transitions, 12366 flow [2024-06-20 16:59:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:59:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:59:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 16:59:54,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:59:54,822 INFO L175 Difference]: Start difference. First operand has 394 places, 622 transitions, 11030 flow. Second operand 6 states and 99 transitions. [2024-06-20 16:59:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 642 transitions, 12366 flow [2024-06-20 17:00:01,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 642 transitions, 12222 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 17:00:01,615 INFO L231 Difference]: Finished difference. Result has 397 places, 622 transitions, 10945 flow [2024-06-20 17:00:01,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10886, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10945, PETRI_PLACES=397, PETRI_TRANSITIONS=622} [2024-06-20 17:00:01,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-20 17:00:01,616 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 622 transitions, 10945 flow [2024-06-20 17:00:01,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:01,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:01,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:01,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:00:01,616 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)] === [2024-06-20 17:00:01,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:01,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2063740081, now seen corresponding path program 6 times [2024-06-20 17:00:01,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:01,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004940642] [2024-06-20 17:00:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:01,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:04,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004940642] [2024-06-20 17:00:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004940642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:04,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:04,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846340129] [2024-06-20 17:00:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:04,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:00:04,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 622 transitions, 10945 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:04,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:04,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:00:04,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:06,785 INFO L124 PetriNetUnfolderBase]: 4594/6990 cut-off events. [2024-06-20 17:00:06,785 INFO L125 PetriNetUnfolderBase]: For 1360507/1360507 co-relation queries the response was YES. [2024-06-20 17:00:06,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79819 conditions, 6990 events. 4594/6990 cut-off events. For 1360507/1360507 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 39558 event pairs, 888 based on Foata normal form. 2/6990 useless extension candidates. Maximal degree in co-relation 79622. Up to 6873 conditions per place. [2024-06-20 17:00:06,932 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 609 selfloop transitions, 45 changer transitions 0/657 dead transitions. [2024-06-20 17:00:06,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 657 transitions, 12472 flow [2024-06-20 17:00:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:00:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:00:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:00:06,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:00:06,933 INFO L175 Difference]: Start difference. First operand has 397 places, 622 transitions, 10945 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:00:06,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 657 transitions, 12472 flow [2024-06-20 17:00:11,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 657 transitions, 12413 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:00:11,892 INFO L231 Difference]: Finished difference. Result has 400 places, 625 transitions, 11076 flow [2024-06-20 17:00:11,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10886, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11076, PETRI_PLACES=400, PETRI_TRANSITIONS=625} [2024-06-20 17:00:11,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-20 17:00:11,893 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 625 transitions, 11076 flow [2024-06-20 17:00:11,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:11,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:11,893 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] [2024-06-20 17:00:11,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:00:11,893 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)] === [2024-06-20 17:00:11,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash 470858003, now seen corresponding path program 5 times [2024-06-20 17:00:11,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:11,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141931997] [2024-06-20 17:00:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:14,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:14,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141931997] [2024-06-20 17:00:14,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141931997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:14,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:14,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:14,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804753848] [2024-06-20 17:00:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:14,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:00:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 625 transitions, 11076 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:00:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:17,183 INFO L124 PetriNetUnfolderBase]: 4633/7051 cut-off events. [2024-06-20 17:00:17,183 INFO L125 PetriNetUnfolderBase]: For 1445684/1445684 co-relation queries the response was YES. [2024-06-20 17:00:17,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80630 conditions, 7051 events. 4633/7051 cut-off events. For 1445684/1445684 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39895 event pairs, 772 based on Foata normal form. 14/7063 useless extension candidates. Maximal degree in co-relation 80432. Up to 6831 conditions per place. [2024-06-20 17:00:17,312 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 626 selfloop transitions, 46 changer transitions 0/675 dead transitions. [2024-06-20 17:00:17,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 675 transitions, 12719 flow [2024-06-20 17:00:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:00:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:00:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:00:17,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:00:17,313 INFO L175 Difference]: Start difference. First operand has 400 places, 625 transitions, 11076 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:00:17,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 675 transitions, 12719 flow [2024-06-20 17:00:21,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 675 transitions, 12543 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 17:00:21,754 INFO L231 Difference]: Finished difference. Result has 402 places, 626 transitions, 11046 flow [2024-06-20 17:00:21,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10900, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11046, PETRI_PLACES=402, PETRI_TRANSITIONS=626} [2024-06-20 17:00:21,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-20 17:00:21,755 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 626 transitions, 11046 flow [2024-06-20 17:00:21,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:21,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:21,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:21,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:00:21,755 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)] === [2024-06-20 17:00:21,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2063729851, now seen corresponding path program 7 times [2024-06-20 17:00:21,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:21,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938833218] [2024-06-20 17:00:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:21,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938833218] [2024-06-20 17:00:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938833218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:23,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:23,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104363691] [2024-06-20 17:00:23,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:23,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:23,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:24,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:00:24,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 626 transitions, 11046 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:24,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:24,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:00:24,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:26,822 INFO L124 PetriNetUnfolderBase]: 4651/7076 cut-off events. [2024-06-20 17:00:26,822 INFO L125 PetriNetUnfolderBase]: For 1408175/1408175 co-relation queries the response was YES. [2024-06-20 17:00:26,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81288 conditions, 7076 events. 4651/7076 cut-off events. For 1408175/1408175 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40172 event pairs, 893 based on Foata normal form. 2/7076 useless extension candidates. Maximal degree in co-relation 81089. Up to 6887 conditions per place. [2024-06-20 17:00:26,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 601 selfloop transitions, 74 changer transitions 0/678 dead transitions. [2024-06-20 17:00:26,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 678 transitions, 13290 flow [2024-06-20 17:00:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:00:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:00:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:00:26,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:00:26,939 INFO L175 Difference]: Start difference. First operand has 402 places, 626 transitions, 11046 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:00:26,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 678 transitions, 13290 flow [2024-06-20 17:00:32,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 678 transitions, 13186 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:00:32,630 INFO L231 Difference]: Finished difference. Result has 406 places, 635 transitions, 11447 flow [2024-06-20 17:00:32,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10942, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11447, PETRI_PLACES=406, PETRI_TRANSITIONS=635} [2024-06-20 17:00:32,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-20 17:00:32,631 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 635 transitions, 11447 flow [2024-06-20 17:00:32,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:32,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:32,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:32,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:00:32,631 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)] === [2024-06-20 17:00:32,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 471227399, now seen corresponding path program 4 times [2024-06-20 17:00:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:32,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084494323] [2024-06-20 17:00:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:32,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:35,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084494323] [2024-06-20 17:00:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084494323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:35,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:35,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888188370] [2024-06-20 17:00:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:35,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:35,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:00:35,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 635 transitions, 11447 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:35,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:35,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:00:35,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:38,112 INFO L124 PetriNetUnfolderBase]: 4646/7069 cut-off events. [2024-06-20 17:00:38,112 INFO L125 PetriNetUnfolderBase]: For 1424571/1424571 co-relation queries the response was YES. [2024-06-20 17:00:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81730 conditions, 7069 events. 4646/7069 cut-off events. For 1424571/1424571 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40152 event pairs, 899 based on Foata normal form. 2/7069 useless extension candidates. Maximal degree in co-relation 81528. Up to 6991 conditions per place. [2024-06-20 17:00:38,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 623 selfloop transitions, 32 changer transitions 0/658 dead transitions. [2024-06-20 17:00:38,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 658 transitions, 12896 flow [2024-06-20 17:00:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:00:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:00:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 17:00:38,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 17:00:38,443 INFO L175 Difference]: Start difference. First operand has 406 places, 635 transitions, 11447 flow. Second operand 7 states and 110 transitions. [2024-06-20 17:00:38,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 658 transitions, 12896 flow [2024-06-20 17:00:43,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 658 transitions, 12714 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 17:00:43,705 INFO L231 Difference]: Finished difference. Result has 409 places, 637 transitions, 11417 flow [2024-06-20 17:00:43,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11265, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11417, PETRI_PLACES=409, PETRI_TRANSITIONS=637} [2024-06-20 17:00:43,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-20 17:00:43,706 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 637 transitions, 11417 flow [2024-06-20 17:00:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:43,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:43,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:00:43,706 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)] === [2024-06-20 17:00:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash -385876089, now seen corresponding path program 8 times [2024-06-20 17:00:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:43,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202866747] [2024-06-20 17:00:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:45,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:45,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202866747] [2024-06-20 17:00:45,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202866747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:45,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:45,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:45,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500010345] [2024-06-20 17:00:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:45,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:45,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:45,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:45,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:00:45,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 637 transitions, 11417 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:45,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:45,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:00:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:48,657 INFO L124 PetriNetUnfolderBase]: 4647/7071 cut-off events. [2024-06-20 17:00:48,658 INFO L125 PetriNetUnfolderBase]: For 1439108/1439108 co-relation queries the response was YES. [2024-06-20 17:00:48,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81615 conditions, 7071 events. 4647/7071 cut-off events. For 1439108/1439108 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40129 event pairs, 898 based on Foata normal form. 3/7072 useless extension candidates. Maximal degree in co-relation 81412. Up to 6977 conditions per place. [2024-06-20 17:00:48,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 617 selfloop transitions, 44 changer transitions 0/664 dead transitions. [2024-06-20 17:00:48,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 664 transitions, 13138 flow [2024-06-20 17:00:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:00:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:00:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:00:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-20 17:00:48,794 INFO L175 Difference]: Start difference. First operand has 409 places, 637 transitions, 11417 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:00:48,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 664 transitions, 13138 flow [2024-06-20 17:00:54,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 664 transitions, 12977 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 17:00:54,514 INFO L231 Difference]: Finished difference. Result has 412 places, 640 transitions, 11447 flow [2024-06-20 17:00:54,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11256, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11447, PETRI_PLACES=412, PETRI_TRANSITIONS=640} [2024-06-20 17:00:54,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-20 17:00:54,514 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 640 transitions, 11447 flow [2024-06-20 17:00:54,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:54,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:54,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:54,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:00:54,515 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)] === [2024-06-20 17:00:54,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash -385863627, now seen corresponding path program 3 times [2024-06-20 17:00:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692771115] [2024-06-20 17:00:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:56,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692771115] [2024-06-20 17:00:56,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692771115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:56,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:56,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:00:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548386327] [2024-06-20 17:00:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:56,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:00:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:00:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:00:56,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:00:56,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 640 transitions, 11447 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:56,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:56,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:00:56,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:59,683 INFO L124 PetriNetUnfolderBase]: 4642/7064 cut-off events. [2024-06-20 17:00:59,683 INFO L125 PetriNetUnfolderBase]: For 1443207/1443207 co-relation queries the response was YES. [2024-06-20 17:00:59,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81474 conditions, 7064 events. 4642/7064 cut-off events. For 1443207/1443207 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40130 event pairs, 898 based on Foata normal form. 1/7063 useless extension candidates. Maximal degree in co-relation 81270. Up to 6983 conditions per place. [2024-06-20 17:00:59,794 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 620 selfloop transitions, 38 changer transitions 0/661 dead transitions. [2024-06-20 17:00:59,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 661 transitions, 12832 flow [2024-06-20 17:00:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:00:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:00:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 17:00:59,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-20 17:00:59,796 INFO L175 Difference]: Start difference. First operand has 412 places, 640 transitions, 11447 flow. Second operand 7 states and 111 transitions. [2024-06-20 17:00:59,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 661 transitions, 12832 flow [2024-06-20 17:01:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 661 transitions, 12578 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-20 17:01:05,220 INFO L231 Difference]: Finished difference. Result has 413 places, 640 transitions, 11281 flow [2024-06-20 17:01:05,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11193, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11281, PETRI_PLACES=413, PETRI_TRANSITIONS=640} [2024-06-20 17:01:05,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-20 17:01:05,221 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 640 transitions, 11281 flow [2024-06-20 17:01:05,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:05,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:05,221 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] [2024-06-20 17:01:05,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:01:05,221 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)] === [2024-06-20 17:01:05,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1457468819, now seen corresponding path program 1 times [2024-06-20 17:01:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:05,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340956640] [2024-06-20 17:01:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:05,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:08,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:08,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340956640] [2024-06-20 17:01:08,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340956640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:08,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:08,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:08,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401870563] [2024-06-20 17:01:08,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:08,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:08,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:08,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:08,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:01:08,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 640 transitions, 11281 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:08,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:01:08,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:11,691 INFO L124 PetriNetUnfolderBase]: 4671/7109 cut-off events. [2024-06-20 17:01:11,691 INFO L125 PetriNetUnfolderBase]: For 1501812/1501841 co-relation queries the response was YES. [2024-06-20 17:01:11,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82126 conditions, 7109 events. 4671/7109 cut-off events. For 1501812/1501841 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40350 event pairs, 802 based on Foata normal form. 24/7129 useless extension candidates. Maximal degree in co-relation 81921. Up to 6680 conditions per place. [2024-06-20 17:01:11,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 557 selfloop transitions, 115 changer transitions 0/675 dead transitions. [2024-06-20 17:01:11,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 675 transitions, 13083 flow [2024-06-20 17:01:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:01:11,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:01:11,816 INFO L175 Difference]: Start difference. First operand has 413 places, 640 transitions, 11281 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:01:11,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 675 transitions, 13083 flow [2024-06-20 17:01:18,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 675 transitions, 12997 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:01:18,096 INFO L231 Difference]: Finished difference. Result has 414 places, 646 transitions, 11589 flow [2024-06-20 17:01:18,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11197, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11589, PETRI_PLACES=414, PETRI_TRANSITIONS=646} [2024-06-20 17:01:18,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-20 17:01:18,096 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 646 transitions, 11589 flow [2024-06-20 17:01:18,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:18,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:18,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:18,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:01:18,097 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)] === [2024-06-20 17:01:18,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1781269407, now seen corresponding path program 2 times [2024-06-20 17:01:18,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:18,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049600395] [2024-06-20 17:01:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:18,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:21,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:21,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049600395] [2024-06-20 17:01:21,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049600395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:21,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:21,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:21,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73925512] [2024-06-20 17:01:21,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:21,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:21,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:21,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:01:21,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 646 transitions, 11589 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:21,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:21,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:01:21,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:24,448 INFO L124 PetriNetUnfolderBase]: 4687/7133 cut-off events. [2024-06-20 17:01:24,449 INFO L125 PetriNetUnfolderBase]: For 1504767/1504796 co-relation queries the response was YES. [2024-06-20 17:01:24,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82837 conditions, 7133 events. 4687/7133 cut-off events. For 1504767/1504796 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40557 event pairs, 886 based on Foata normal form. 24/7153 useless extension candidates. Maximal degree in co-relation 82632. Up to 6784 conditions per place. [2024-06-20 17:01:24,565 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 559 selfloop transitions, 111 changer transitions 0/673 dead transitions. [2024-06-20 17:01:24,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 673 transitions, 13088 flow [2024-06-20 17:01:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:01:24,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 17:01:24,566 INFO L175 Difference]: Start difference. First operand has 414 places, 646 transitions, 11589 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:01:24,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 673 transitions, 13088 flow [2024-06-20 17:01:31,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 673 transitions, 12825 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-20 17:01:31,325 INFO L231 Difference]: Finished difference. Result has 418 places, 649 transitions, 11641 flow [2024-06-20 17:01:31,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11360, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11641, PETRI_PLACES=418, PETRI_TRANSITIONS=649} [2024-06-20 17:01:31,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-20 17:01:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 649 transitions, 11641 flow [2024-06-20 17:01:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:31,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:31,326 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] [2024-06-20 17:01:31,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:01:31,326 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)] === [2024-06-20 17:01:31,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1663181727, now seen corresponding path program 3 times [2024-06-20 17:01:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:31,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231894538] [2024-06-20 17:01:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231894538] [2024-06-20 17:01:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231894538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:34,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828066160] [2024-06-20 17:01:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:34,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:01:34,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 649 transitions, 11641 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:01:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:37,426 INFO L124 PetriNetUnfolderBase]: 4791/7291 cut-off events. [2024-06-20 17:01:37,426 INFO L125 PetriNetUnfolderBase]: For 1690155/1690155 co-relation queries the response was YES. [2024-06-20 17:01:37,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84330 conditions, 7291 events. 4791/7291 cut-off events. For 1690155/1690155 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41599 event pairs, 907 based on Foata normal form. 28/7317 useless extension candidates. Maximal degree in co-relation 84123. Up to 7030 conditions per place. [2024-06-20 17:01:37,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 617 selfloop transitions, 63 changer transitions 0/683 dead transitions. [2024-06-20 17:01:37,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 683 transitions, 13334 flow [2024-06-20 17:01:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:01:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:01:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:01:37,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 17:01:37,551 INFO L175 Difference]: Start difference. First operand has 418 places, 649 transitions, 11641 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:01:37,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 683 transitions, 13334 flow [2024-06-20 17:01:44,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 683 transitions, 13088 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:01:44,120 INFO L231 Difference]: Finished difference. Result has 421 places, 654 transitions, 11654 flow [2024-06-20 17:01:44,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11397, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11654, PETRI_PLACES=421, PETRI_TRANSITIONS=654} [2024-06-20 17:01:44,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-20 17:01:44,122 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 654 transitions, 11654 flow [2024-06-20 17:01:44,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:44,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:44,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:44,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:01:44,124 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)] === [2024-06-20 17:01:44,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1662997029, now seen corresponding path program 1 times [2024-06-20 17:01:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:44,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898065995] [2024-06-20 17:01:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898065995] [2024-06-20 17:01:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898065995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:47,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:47,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:01:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44641740] [2024-06-20 17:01:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:01:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:01:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:01:47,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:01:47,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 654 transitions, 11654 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:47,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:47,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:01:47,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:50,507 INFO L124 PetriNetUnfolderBase]: 4799/7304 cut-off events. [2024-06-20 17:01:50,507 INFO L125 PetriNetUnfolderBase]: For 1545695/1545695 co-relation queries the response was YES. [2024-06-20 17:01:50,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84649 conditions, 7304 events. 4799/7304 cut-off events. For 1545695/1545695 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41692 event pairs, 905 based on Foata normal form. 2/7304 useless extension candidates. Maximal degree in co-relation 84441. Up to 7235 conditions per place. [2024-06-20 17:01:50,634 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 641 selfloop transitions, 31 changer transitions 0/675 dead transitions. [2024-06-20 17:01:50,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 675 transitions, 13113 flow [2024-06-20 17:01:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-20 17:01:50,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-20 17:01:50,635 INFO L175 Difference]: Start difference. First operand has 421 places, 654 transitions, 11654 flow. Second operand 8 states and 116 transitions. [2024-06-20 17:01:50,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 675 transitions, 13113 flow [2024-06-20 17:01:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 675 transitions, 12970 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:01:57,697 INFO L231 Difference]: Finished difference. Result has 424 places, 657 transitions, 11655 flow [2024-06-20 17:01:57,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11511, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11655, PETRI_PLACES=424, PETRI_TRANSITIONS=657} [2024-06-20 17:01:57,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-20 17:01:57,697 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 657 transitions, 11655 flow [2024-06-20 17:01:57,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:57,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:57,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:57,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:01:57,698 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)] === [2024-06-20 17:01:57,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash 120444651, now seen corresponding path program 2 times [2024-06-20 17:01:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:57,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61699889] [2024-06-20 17:01:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61699889] [2024-06-20 17:02:00,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61699889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:00,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:00,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:00,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874813836] [2024-06-20 17:02:00,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:00,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:02:00,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 657 transitions, 11655 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:00,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:00,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:02:00,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:03,439 INFO L124 PetriNetUnfolderBase]: 4807/7317 cut-off events. [2024-06-20 17:02:03,439 INFO L125 PetriNetUnfolderBase]: For 1568920/1568922 co-relation queries the response was YES. [2024-06-20 17:02:03,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84682 conditions, 7317 events. 4807/7317 cut-off events. For 1568920/1568922 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41737 event pairs, 912 based on Foata normal form. 4/7319 useless extension candidates. Maximal degree in co-relation 84472. Up to 7224 conditions per place. [2024-06-20 17:02:03,570 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 641 selfloop transitions, 31 changer transitions 0/675 dead transitions. [2024-06-20 17:02:03,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 675 transitions, 13379 flow [2024-06-20 17:02:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:02:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:02:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-20 17:02:03,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-20 17:02:03,571 INFO L175 Difference]: Start difference. First operand has 424 places, 657 transitions, 11655 flow. Second operand 6 states and 91 transitions. [2024-06-20 17:02:03,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 675 transitions, 13379 flow [2024-06-20 17:02:09,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 675 transitions, 13266 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:09,837 INFO L231 Difference]: Finished difference. Result has 425 places, 661 transitions, 11725 flow [2024-06-20 17:02:09,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11542, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11725, PETRI_PLACES=425, PETRI_TRANSITIONS=661} [2024-06-20 17:02:09,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-20 17:02:09,837 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 661 transitions, 11725 flow [2024-06-20 17:02:09,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:09,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:09,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:02:09,838 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)] === [2024-06-20 17:02:09,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 27628199, now seen corresponding path program 3 times [2024-06-20 17:02:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:09,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434612729] [2024-06-20 17:02:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:09,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:12,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434612729] [2024-06-20 17:02:12,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434612729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:12,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:12,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495993126] [2024-06-20 17:02:12,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:12,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:02:12,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 661 transitions, 11725 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:12,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:12,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:02:12,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:15,539 INFO L124 PetriNetUnfolderBase]: 4802/7309 cut-off events. [2024-06-20 17:02:15,539 INFO L125 PetriNetUnfolderBase]: For 1579694/1579694 co-relation queries the response was YES. [2024-06-20 17:02:15,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84612 conditions, 7309 events. 4802/7309 cut-off events. For 1579694/1579694 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41739 event pairs, 904 based on Foata normal form. 2/7309 useless extension candidates. Maximal degree in co-relation 84401. Up to 7234 conditions per place. [2024-06-20 17:02:15,674 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 643 selfloop transitions, 31 changer transitions 0/677 dead transitions. [2024-06-20 17:02:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 677 transitions, 13117 flow [2024-06-20 17:02:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:02:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:02:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-20 17:02:15,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-20 17:02:15,675 INFO L175 Difference]: Start difference. First operand has 425 places, 661 transitions, 11725 flow. Second operand 6 states and 95 transitions. [2024-06-20 17:02:15,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 677 transitions, 13117 flow [2024-06-20 17:02:22,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 677 transitions, 12995 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-20 17:02:22,764 INFO L231 Difference]: Finished difference. Result has 429 places, 661 transitions, 11673 flow [2024-06-20 17:02:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11603, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11673, PETRI_PLACES=429, PETRI_TRANSITIONS=661} [2024-06-20 17:02:22,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-20 17:02:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 661 transitions, 11673 flow [2024-06-20 17:02:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:22,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:02:22,765 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)] === [2024-06-20 17:02:22,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -208731859, now seen corresponding path program 4 times [2024-06-20 17:02:22,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:22,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898423924] [2024-06-20 17:02:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:22,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:25,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:25,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898423924] [2024-06-20 17:02:25,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898423924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:25,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:25,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:25,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154004587] [2024-06-20 17:02:25,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:25,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:25,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-20 17:02:25,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 661 transitions, 11673 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:25,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:25,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-20 17:02:25,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:29,056 INFO L124 PetriNetUnfolderBase]: 4893/7449 cut-off events. [2024-06-20 17:02:29,056 INFO L125 PetriNetUnfolderBase]: For 1775753/1775753 co-relation queries the response was YES. [2024-06-20 17:02:29,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85878 conditions, 7449 events. 4893/7449 cut-off events. For 1775753/1775753 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 42542 event pairs, 792 based on Foata normal form. 28/7475 useless extension candidates. Maximal degree in co-relation 85665. Up to 6750 conditions per place. [2024-06-20 17:02:29,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 150 changer transitions 0/711 dead transitions. [2024-06-20 17:02:29,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 711 transitions, 13443 flow [2024-06-20 17:02:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:02:29,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:02:29,188 INFO L175 Difference]: Start difference. First operand has 429 places, 661 transitions, 11673 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:02:29,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 711 transitions, 13443 flow Killed by 15