./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe019_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe019_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:21:20,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:21:20,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:21:20,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:21:20,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:21:20,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:21:20,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:21:20,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:21:20,911 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:21:20,914 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:21:20,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:21:20,915 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:21:20,916 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:21:20,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:21:20,918 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:21:20,918 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:21:20,918 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:21:20,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:21:20,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:21:20,919 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:21:20,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:21:20,920 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:21:20,920 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:21:20,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:21:20,921 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:21:20,921 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:21:20,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:21:20,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:21:20,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:21:20,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:21:20,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:21:20,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:21:20,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:21:20,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:21:20,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:21:20,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:21:20,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:21:20,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:21:20,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:21:20,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:21:20,926 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:21:20,926 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:21:20,926 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:21:20,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:21:21,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:21:21,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:21:21,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:21:21,189 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:21:21,190 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:21:21,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-27 21:21:22,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:21:22,654 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:21:22,654 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-27 21:21:22,671 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b39dbaf/93945384ac2d4e5b9540995b96b1fa4a/FLAGcf2966551 [2024-06-27 21:21:22,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b39dbaf/93945384ac2d4e5b9540995b96b1fa4a [2024-06-27 21:21:22,685 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:21:22,686 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:21:22,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_rmo.oepc.yml/witness.yml [2024-06-27 21:21:22,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:21:22,937 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:21:22,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:21:22,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:21:22,943 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:21:22,944 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:21:22" (1/2) ... [2024-06-27 21:21:22,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e25aa1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:22, skipping insertion in model container [2024-06-27 21:21:22,945 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:21:22" (1/2) ... [2024-06-27 21:21:22,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20e98d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:21:22, skipping insertion in model container [2024-06-27 21:21:22,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:21:22" (2/2) ... [2024-06-27 21:21:22,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e25aa1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:22, skipping insertion in model container [2024-06-27 21:21:22,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:21:22" (2/2) ... [2024-06-27 21:21:22,948 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:21:23,171 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:21:23,172 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:21:23,172 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:21:23,184 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:21:23,184 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:21:23,184 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:21:23,184 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 21:21:23,242 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:21:23,610 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:21:23,624 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:21:23,760 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:21:23,802 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:21:23,802 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23 WrapperNode [2024-06-27 21:21:23,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:21:23,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:21:23,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:21:23,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:21:23,811 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 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,847 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 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,894 INFO L138 Inliner]: procedures = 176, calls = 94, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 256 [2024-06-27 21:21:23,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:21:23,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:21:23,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:21:23,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:21:23,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,950 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-27 21:21:23,951 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,951 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,973 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:21:23,984 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:21:23,992 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:21:23,992 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:21:23,993 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (1/1) ... [2024-06-27 21:21:23,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:21:24,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:21:24,020 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) [2024-06-27 21:21:24,042 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 [2024-06-27 21:21:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:21:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:21:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:21:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:21:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:21:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:21:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:21:24,060 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:21:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:21:24,061 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:21:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:21:24,061 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:21:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:21:24,062 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:21:24,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:21:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:21:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:21:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:21:24,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:21:24,066 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:21:24,229 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:21:24,231 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:21:24,828 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:21:24,829 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:21:25,291 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:21:25,292 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:21:25,297 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:21:25 BoogieIcfgContainer [2024-06-27 21:21:25,297 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:21:25,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:21:25,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:21:25,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:21:25,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:21:22" (1/4) ... [2024-06-27 21:21:25,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cb2df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:21:25, skipping insertion in model container [2024-06-27 21:21:25,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:21:22" (2/4) ... [2024-06-27 21:21:25,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cb2df4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:21:25, skipping insertion in model container [2024-06-27 21:21:25,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:21:23" (3/4) ... [2024-06-27 21:21:25,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cb2df4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:21:25, skipping insertion in model container [2024-06-27 21:21:25,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:21:25" (4/4) ... [2024-06-27 21:21:25,305 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.oepc.i [2024-06-27 21:21:25,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:21:25,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:21:25,322 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:21:25,395 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:21:25,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:21:25,473 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:21:25,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:21:25,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:21:25,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:21:25,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:21:25,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:21:25,502 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;@29801419, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:21:25,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:21:25,510 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:21:25,510 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:21:25,510 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:21:25,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:25,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:21:25,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:25,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash 778677720, now seen corresponding path program 1 times [2024-06-27 21:21:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298922142] [2024-06-27 21:21:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298922142] [2024-06-27 21:21:27,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298922142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:27,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:21:27,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725695361] [2024-06-27 21:21:27,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:21:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:21:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:21:27,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:21:27,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:27,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:27,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:21:27,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:29,605 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-27 21:21:29,606 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 21:21:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 6138 events. 4366/6138 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32201 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-27 21:21:29,659 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 21:21:29,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-27 21:21:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:21:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:21:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 21:21:29,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-27 21:21:29,675 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-27 21:21:29,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-27 21:21:29,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:29,686 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:21:29,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 21:21:29,692 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:21:29,692 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:21:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:29,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:29,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:29,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:21:29,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:29,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash 985009335, now seen corresponding path program 1 times [2024-06-27 21:21:29,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:29,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288003664] [2024-06-27 21:21:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:32,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288003664] [2024-06-27 21:21:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288003664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:32,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:32,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:21:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864079472] [2024-06-27 21:21:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:21:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:32,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:21:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:21:32,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:21:32,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:32,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:32,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:21:32,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:34,371 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-27 21:21:34,371 INFO L125 PetriNetUnfolderBase]: For 1244/1254 co-relation queries the response was YES. [2024-06-27 21:21:34,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1244/1254 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32007 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-27 21:21:34,409 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 21:21:34,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-27 21:21:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:21:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:21:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 21:21:34,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-27 21:21:34,412 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-27 21:21:34,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-27 21:21:34,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:21:34,414 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-27 21:21:34,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 21:21:34,415 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-27 21:21:34,416 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-27 21:21:34,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:34,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:34,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:21:34,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:34,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1197522764, now seen corresponding path program 1 times [2024-06-27 21:21:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963480991] [2024-06-27 21:21:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:37,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963480991] [2024-06-27 21:21:37,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963480991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:37,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:37,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:37,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833680818] [2024-06-27 21:21:37,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:37,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:37,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:37,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:37,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:21:37,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:37,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:37,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:21:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:40,090 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-27 21:21:40,090 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-27 21:21:40,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39846 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-27 21:21:40,131 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-27 21:21:40,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-27 21:21:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 21:21:40,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-27 21:21:40,135 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-27 21:21:40,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-27 21:21:40,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:40,139 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-27 21:21:40,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 21:21:40,140 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-27 21:21:40,140 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-27 21:21:40,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:40,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:40,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:40,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:21:40,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:40,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1223757090, now seen corresponding path program 1 times [2024-06-27 21:21:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:40,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938941699] [2024-06-27 21:21:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:41,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938941699] [2024-06-27 21:21:42,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938941699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:42,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:42,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:21:42,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186077866] [2024-06-27 21:21:42,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:42,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:21:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:21:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:21:42,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:42,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:42,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:42,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:42,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:43,975 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-27 21:21:43,975 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-27 21:21:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 9210 events. 6648/9210 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47489 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-27 21:21:44,025 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-27 21:21:44,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-27 21:21:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:21:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:21:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:21:44,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:21:44,029 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:21:44,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-27 21:21:44,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:44,040 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-27 21:21:44,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-27 21:21:44,042 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 21:21:44,042 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-27 21:21:44,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:44,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:44,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:44,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:21:44,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:44,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1901787101, now seen corresponding path program 1 times [2024-06-27 21:21:44,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:44,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159282936] [2024-06-27 21:21:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:44,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:47,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:47,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159282936] [2024-06-27 21:21:47,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159282936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:47,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:47,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103516379] [2024-06-27 21:21:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:47,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:47,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:47,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:47,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:47,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:47,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:47,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:49,419 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-27 21:21:49,419 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-27 21:21:49,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 9240 events. 6675/9240 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47662 event pairs, 3168 based on Foata normal form. 3/9238 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-27 21:21:49,474 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-27 21:21:49,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-27 21:21:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:21:49,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:21:49,486 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:21:49,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-27 21:21:49,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 21:21:49,494 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-27 21:21:49,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-27 21:21:49,497 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-27 21:21:49,497 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-27 21:21:49,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:49,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:49,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:49,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:21:49,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:49,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1249026463, now seen corresponding path program 2 times [2024-06-27 21:21:49,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:49,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373083217] [2024-06-27 21:21:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:52,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:52,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373083217] [2024-06-27 21:21:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373083217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:52,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:52,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095757958] [2024-06-27 21:21:52,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:52,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:52,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:52,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:52,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:52,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:52,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:54,434 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-27 21:21:54,434 INFO L125 PetriNetUnfolderBase]: For 20628/20641 co-relation queries the response was YES. [2024-06-27 21:21:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20628/20641 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47626 event pairs, 3185 based on Foata normal form. 13/9246 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-27 21:21:54,498 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 21:21:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-27 21:21:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 21:21:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:21:54,501 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-27 21:21:54,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-27 21:21:54,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:54,531 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-27 21:21:54,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 21:21:54,535 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 21:21:54,535 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-27 21:21:54,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:54,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:54,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:54,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:21:54,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:54,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash 790550909, now seen corresponding path program 1 times [2024-06-27 21:21:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:54,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246805230] [2024-06-27 21:21:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:54,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:56,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:56,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246805230] [2024-06-27 21:21:56,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246805230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:56,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:56,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:21:56,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213204918] [2024-06-27 21:21:56,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:56,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:21:56,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:21:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:21:56,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:21:56,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:56,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:56,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:21:56,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:58,654 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-27 21:21:58,655 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-27 21:21:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 9214 events. 6651/9214 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47446 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-27 21:21:58,717 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-27 21:21:58,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-27 21:21:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 21:21:58,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:21:58,720 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-27 21:21:58,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-27 21:21:58,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:58,746 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-27 21:21:58,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-27 21:21:58,747 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 21:21:58,747 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-27 21:21:58,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:58,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:58,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:58,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:21:58,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:21:58,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1440220937, now seen corresponding path program 1 times [2024-06-27 21:21:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:58,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587699244] [2024-06-27 21:21:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:58,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:02,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:02,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587699244] [2024-06-27 21:22:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587699244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:02,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:02,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284246526] [2024-06-27 21:22:02,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:02,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:02,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:02,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:02,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:02,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:04,597 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-27 21:22:04,598 INFO L125 PetriNetUnfolderBase]: For 30768/30770 co-relation queries the response was YES. [2024-06-27 21:22:04,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33868 conditions, 9305 events. 6697/9305 cut-off events. For 30768/30770 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48605 event pairs, 2838 based on Foata normal form. 7/9309 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-27 21:22:04,654 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-27 21:22:04,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-27 21:22:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:22:04,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:22:04,657 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:22:04,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-27 21:22:04,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:04,686 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-27 21:22:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-27 21:22:04,687 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-27 21:22:04,687 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-27 21:22:04,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:04,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:04,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:22:04,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:04,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1440100967, now seen corresponding path program 2 times [2024-06-27 21:22:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695564272] [2024-06-27 21:22:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695564272] [2024-06-27 21:22:07,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695564272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:07,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:07,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83938669] [2024-06-27 21:22:07,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:07,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:07,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:07,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:07,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:07,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:10,278 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-27 21:22:10,278 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-27 21:22:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36900 conditions, 9332 events. 6724/9332 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48207 event pairs, 2984 based on Foata normal form. 3/9330 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-27 21:22:10,319 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-27 21:22:10,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-27 21:22:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 21:22:10,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:22:10,321 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-27 21:22:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-27 21:22:10,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:10,346 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-27 21:22:10,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-27 21:22:10,347 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-27 21:22:10,347 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-27 21:22:10,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:10,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:10,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:10,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:22:10,348 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:10,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash 65116855, now seen corresponding path program 3 times [2024-06-27 21:22:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:10,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015665909] [2024-06-27 21:22:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:10,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:13,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015665909] [2024-06-27 21:22:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015665909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:13,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:13,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699871878] [2024-06-27 21:22:13,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:13,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:13,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:13,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:13,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 682 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:13,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:13,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:13,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:15,924 INFO L124 PetriNetUnfolderBase]: 6715/9323 cut-off events. [2024-06-27 21:22:15,924 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-27 21:22:15,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 9323 events. 6715/9323 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48124 event pairs, 3001 based on Foata normal form. 3/9318 useless extension candidates. Maximal degree in co-relation 39364. Up to 9050 conditions per place. [2024-06-27 21:22:15,969 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-27 21:22:15,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-27 21:22:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 21:22:15,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:22:15,972 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-27 21:22:15,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-27 21:22:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 21:22:16,005 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-27 21:22:16,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-27 21:22:16,006 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-27 21:22:16,006 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-27 21:22:16,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:16,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:16,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:16,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:22:16,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:16,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1467563330, now seen corresponding path program 1 times [2024-06-27 21:22:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:16,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57126661] [2024-06-27 21:22:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:16,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:18,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57126661] [2024-06-27 21:22:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57126661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:18,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:18,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:18,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774866116] [2024-06-27 21:22:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:18,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:18,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:18,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:18,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:18,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:21,181 INFO L124 PetriNetUnfolderBase]: 7004/9734 cut-off events. [2024-06-27 21:22:21,181 INFO L125 PetriNetUnfolderBase]: For 58857/58857 co-relation queries the response was YES. [2024-06-27 21:22:21,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42107 conditions, 9734 events. 7004/9734 cut-off events. For 58857/58857 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50316 event pairs, 2996 based on Foata normal form. 18/9747 useless extension candidates. Maximal degree in co-relation 42074. Up to 9352 conditions per place. [2024-06-27 21:22:21,235 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 136 selfloop transitions, 50 changer transitions 0/192 dead transitions. [2024-06-27 21:22:21,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 192 transitions, 1538 flow [2024-06-27 21:22:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:22:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:22:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 21:22:21,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:22:21,237 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 10 states and 235 transitions. [2024-06-27 21:22:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 192 transitions, 1538 flow [2024-06-27 21:22:21,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 192 transitions, 1452 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:21,280 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1064 flow [2024-06-27 21:22:21,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1064, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2024-06-27 21:22:21,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-27 21:22:21,282 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1064 flow [2024-06-27 21:22:21,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:21,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:21,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:22:21,282 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:21,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2038739330, now seen corresponding path program 2 times [2024-06-27 21:22:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669966689] [2024-06-27 21:22:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:24,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:24,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669966689] [2024-06-27 21:22:24,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669966689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:24,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878942511] [2024-06-27 21:22:24,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:24,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:24,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1064 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:24,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:24,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:24,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:27,199 INFO L124 PetriNetUnfolderBase]: 7048/9798 cut-off events. [2024-06-27 21:22:27,199 INFO L125 PetriNetUnfolderBase]: For 80810/80810 co-relation queries the response was YES. [2024-06-27 21:22:27,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47497 conditions, 9798 events. 7048/9798 cut-off events. For 80810/80810 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50774 event pairs, 2954 based on Foata normal form. 6/9799 useless extension candidates. Maximal degree in co-relation 47458. Up to 9465 conditions per place. [2024-06-27 21:22:27,285 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 132 selfloop transitions, 42 changer transitions 0/180 dead transitions. [2024-06-27 21:22:27,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1610 flow [2024-06-27 21:22:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 21:22:27,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-27 21:22:27,288 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1064 flow. Second operand 7 states and 170 transitions. [2024-06-27 21:22:27,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1610 flow [2024-06-27 21:22:27,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 180 transitions, 1564 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 21:22:27,352 INFO L231 Difference]: Finished difference. Result has 103 places, 134 transitions, 1186 flow [2024-06-27 21:22:27,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1186, PETRI_PLACES=103, PETRI_TRANSITIONS=134} [2024-06-27 21:22:27,353 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-27 21:22:27,353 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 134 transitions, 1186 flow [2024-06-27 21:22:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:27,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:27,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:27,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:22:27,354 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:27,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2018630654, now seen corresponding path program 3 times [2024-06-27 21:22:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:27,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965392913] [2024-06-27 21:22:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:30,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:30,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965392913] [2024-06-27 21:22:30,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965392913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:30,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:30,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:30,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228888402] [2024-06-27 21:22:30,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:30,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:30,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:30,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 134 transitions, 1186 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:30,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:30,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:30,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:32,393 INFO L124 PetriNetUnfolderBase]: 7092/9872 cut-off events. [2024-06-27 21:22:32,393 INFO L125 PetriNetUnfolderBase]: For 93943/93956 co-relation queries the response was YES. [2024-06-27 21:22:32,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49932 conditions, 9872 events. 7092/9872 cut-off events. For 93943/93956 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51221 event pairs, 2974 based on Foata normal form. 16/9881 useless extension candidates. Maximal degree in co-relation 49891. Up to 9567 conditions per place. [2024-06-27 21:22:32,461 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 40 changer transitions 0/181 dead transitions. [2024-06-27 21:22:32,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 181 transitions, 1718 flow [2024-06-27 21:22:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 21:22:32,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-27 21:22:32,463 INFO L175 Difference]: Start difference. First operand has 103 places, 134 transitions, 1186 flow. Second operand 7 states and 166 transitions. [2024-06-27 21:22:32,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 181 transitions, 1718 flow [2024-06-27 21:22:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 181 transitions, 1604 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:32,566 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 1213 flow [2024-06-27 21:22:32,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-06-27 21:22:32,567 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-27 21:22:32,567 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 1213 flow [2024-06-27 21:22:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:32,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:32,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:32,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:22:32,568 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:32,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -489720484, now seen corresponding path program 4 times [2024-06-27 21:22:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:32,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084924860] [2024-06-27 21:22:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:35,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084924860] [2024-06-27 21:22:35,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084924860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:35,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:35,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:22:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936269876] [2024-06-27 21:22:35,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:22:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:22:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:22:35,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:35,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:35,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:35,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:35,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:37,653 INFO L124 PetriNetUnfolderBase]: 7077/9851 cut-off events. [2024-06-27 21:22:37,653 INFO L125 PetriNetUnfolderBase]: For 106498/106511 co-relation queries the response was YES. [2024-06-27 21:22:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51354 conditions, 9851 events. 7077/9851 cut-off events. For 106498/106511 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51061 event pairs, 2729 based on Foata normal form. 16/9860 useless extension candidates. Maximal degree in co-relation 51312. Up to 9376 conditions per place. [2024-06-27 21:22:37,713 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 128 selfloop transitions, 50 changer transitions 0/184 dead transitions. [2024-06-27 21:22:37,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 1751 flow [2024-06-27 21:22:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:22:37,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-27 21:22:37,715 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 1213 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:22:37,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 1751 flow [2024-06-27 21:22:37,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 184 transitions, 1636 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:37,806 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1264 flow [2024-06-27 21:22:37,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-06-27 21:22:37,806 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-27 21:22:37,806 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1264 flow [2024-06-27 21:22:37,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:37,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:37,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:22:37,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:37,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:37,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1483308204, now seen corresponding path program 1 times [2024-06-27 21:22:37,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:37,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153594428] [2024-06-27 21:22:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:37,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153594428] [2024-06-27 21:22:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153594428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5753441] [2024-06-27 21:22:41,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:41,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:41,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:41,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:41,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:41,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:41,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:44,397 INFO L124 PetriNetUnfolderBase]: 7675/10735 cut-off events. [2024-06-27 21:22:44,398 INFO L125 PetriNetUnfolderBase]: For 136160/136162 co-relation queries the response was YES. [2024-06-27 21:22:44,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58144 conditions, 10735 events. 7675/10735 cut-off events. For 136160/136162 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57086 event pairs, 2379 based on Foata normal form. 32/10764 useless extension candidates. Maximal degree in co-relation 58101. Up to 9738 conditions per place. [2024-06-27 21:22:44,469 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 177 selfloop transitions, 43 changer transitions 0/226 dead transitions. [2024-06-27 21:22:44,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 226 transitions, 2156 flow [2024-06-27 21:22:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 21:22:44,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-27 21:22:44,471 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1264 flow. Second operand 9 states and 231 transitions. [2024-06-27 21:22:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 226 transitions, 2156 flow [2024-06-27 21:22:44,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 226 transitions, 2016 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:44,592 INFO L231 Difference]: Finished difference. Result has 112 places, 149 transitions, 1360 flow [2024-06-27 21:22:44,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1360, PETRI_PLACES=112, PETRI_TRANSITIONS=149} [2024-06-27 21:22:44,593 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-27 21:22:44,593 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 149 transitions, 1360 flow [2024-06-27 21:22:44,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:44,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:44,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:44,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:22:44,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:44,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1072780810, now seen corresponding path program 2 times [2024-06-27 21:22:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:44,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459723113] [2024-06-27 21:22:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:44,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459723113] [2024-06-27 21:22:48,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459723113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:48,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:48,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766322390] [2024-06-27 21:22:48,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:48,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:48,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:48,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:48,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 149 transitions, 1360 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:48,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:48,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:48,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:51,078 INFO L124 PetriNetUnfolderBase]: 7577/10597 cut-off events. [2024-06-27 21:22:51,079 INFO L125 PetriNetUnfolderBase]: For 148419/148421 co-relation queries the response was YES. [2024-06-27 21:22:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58707 conditions, 10597 events. 7577/10597 cut-off events. For 148419/148421 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 56215 event pairs, 2859 based on Foata normal form. 42/10636 useless extension candidates. Maximal degree in co-relation 58662. Up to 9994 conditions per place. [2024-06-27 21:22:51,150 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-27 21:22:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 212 transitions, 1993 flow [2024-06-27 21:22:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 21:22:51,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-27 21:22:51,152 INFO L175 Difference]: Start difference. First operand has 112 places, 149 transitions, 1360 flow. Second operand 8 states and 202 transitions. [2024-06-27 21:22:51,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 212 transitions, 1993 flow [2024-06-27 21:22:51,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 212 transitions, 1889 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:51,303 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1366 flow [2024-06-27 21:22:51,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-27 21:22:51,303 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-27 21:22:51,303 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1366 flow [2024-06-27 21:22:51,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:51,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:51,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:51,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:22:51,304 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:51,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash -957489640, now seen corresponding path program 3 times [2024-06-27 21:22:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:51,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514451947] [2024-06-27 21:22:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514451947] [2024-06-27 21:22:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514451947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:54,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494329947] [2024-06-27 21:22:54,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:54,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:54,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:22:54,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:54,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:54,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:22:54,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:57,775 INFO L124 PetriNetUnfolderBase]: 7733/10845 cut-off events. [2024-06-27 21:22:57,775 INFO L125 PetriNetUnfolderBase]: For 157440/157440 co-relation queries the response was YES. [2024-06-27 21:22:57,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60189 conditions, 10845 events. 7733/10845 cut-off events. For 157440/157440 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 58272 event pairs, 2900 based on Foata normal form. 24/10864 useless extension candidates. Maximal degree in co-relation 60142. Up to 10250 conditions per place. [2024-06-27 21:22:57,839 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 154 selfloop transitions, 51 changer transitions 0/211 dead transitions. [2024-06-27 21:22:57,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 211 transitions, 2014 flow [2024-06-27 21:22:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 21:22:57,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-27 21:22:57,842 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1366 flow. Second operand 8 states and 197 transitions. [2024-06-27 21:22:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 211 transitions, 2014 flow [2024-06-27 21:22:57,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 211 transitions, 1943 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:57,970 INFO L231 Difference]: Finished difference. Result has 117 places, 152 transitions, 1457 flow [2024-06-27 21:22:57,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1457, PETRI_PLACES=117, PETRI_TRANSITIONS=152} [2024-06-27 21:22:57,970 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-27 21:22:57,971 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 152 transitions, 1457 flow [2024-06-27 21:22:57,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:57,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:57,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:57,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:22:57,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:22:57,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1223588044, now seen corresponding path program 1 times [2024-06-27 21:22:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:57,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945258170] [2024-06-27 21:22:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:01,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945258170] [2024-06-27 21:23:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945258170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:01,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:01,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:01,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517150992] [2024-06-27 21:23:01,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:01,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:01,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:01,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 152 transitions, 1457 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:01,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:01,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:01,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:04,155 INFO L124 PetriNetUnfolderBase]: 7845/11037 cut-off events. [2024-06-27 21:23:04,155 INFO L125 PetriNetUnfolderBase]: For 176090/176090 co-relation queries the response was YES. [2024-06-27 21:23:04,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62535 conditions, 11037 events. 7845/11037 cut-off events. For 176090/176090 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 59755 event pairs, 2882 based on Foata normal form. 18/11050 useless extension candidates. Maximal degree in co-relation 62487. Up to 9982 conditions per place. [2024-06-27 21:23:04,231 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 154 selfloop transitions, 57 changer transitions 0/217 dead transitions. [2024-06-27 21:23:04,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 217 transitions, 2150 flow [2024-06-27 21:23:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 21:23:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-27 21:23:04,233 INFO L175 Difference]: Start difference. First operand has 117 places, 152 transitions, 1457 flow. Second operand 8 states and 199 transitions. [2024-06-27 21:23:04,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 217 transitions, 2150 flow [2024-06-27 21:23:04,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 217 transitions, 2026 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:04,397 INFO L231 Difference]: Finished difference. Result has 120 places, 155 transitions, 1546 flow [2024-06-27 21:23:04,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1546, PETRI_PLACES=120, PETRI_TRANSITIONS=155} [2024-06-27 21:23:04,398 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-27 21:23:04,398 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 155 transitions, 1546 flow [2024-06-27 21:23:04,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:04,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:04,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:04,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:23:04,399 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:04,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1847141450, now seen corresponding path program 4 times [2024-06-27 21:23:04,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:04,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309935580] [2024-06-27 21:23:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309935580] [2024-06-27 21:23:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309935580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:07,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103943323] [2024-06-27 21:23:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:07,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:07,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:07,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 155 transitions, 1546 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:07,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:07,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:07,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:10,873 INFO L124 PetriNetUnfolderBase]: 7942/11189 cut-off events. [2024-06-27 21:23:10,873 INFO L125 PetriNetUnfolderBase]: For 195160/195160 co-relation queries the response was YES. [2024-06-27 21:23:10,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64633 conditions, 11189 events. 7942/11189 cut-off events. For 195160/195160 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 60671 event pairs, 2960 based on Foata normal form. 24/11203 useless extension candidates. Maximal degree in co-relation 64583. Up to 10573 conditions per place. [2024-06-27 21:23:10,961 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 157 selfloop transitions, 50 changer transitions 0/213 dead transitions. [2024-06-27 21:23:10,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 2202 flow [2024-06-27 21:23:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 21:23:10,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-27 21:23:10,964 INFO L175 Difference]: Start difference. First operand has 120 places, 155 transitions, 1546 flow. Second operand 8 states and 193 transitions. [2024-06-27 21:23:10,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 2202 flow [2024-06-27 21:23:11,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 213 transitions, 2072 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:23:11,120 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1584 flow [2024-06-27 21:23:11,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1584, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-27 21:23:11,121 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-27 21:23:11,121 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1584 flow [2024-06-27 21:23:11,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:11,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:11,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:11,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:23:11,121 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:11,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1762360986, now seen corresponding path program 2 times [2024-06-27 21:23:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:11,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143317774] [2024-06-27 21:23:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:14,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143317774] [2024-06-27 21:23:14,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143317774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:14,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:14,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056517111] [2024-06-27 21:23:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:14,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:14,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1584 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:14,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:14,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:14,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:17,419 INFO L124 PetriNetUnfolderBase]: 8054/11381 cut-off events. [2024-06-27 21:23:17,419 INFO L125 PetriNetUnfolderBase]: For 213381/213381 co-relation queries the response was YES. [2024-06-27 21:23:17,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66583 conditions, 11381 events. 8054/11381 cut-off events. For 213381/213381 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 62126 event pairs, 2960 based on Foata normal form. 18/11389 useless extension candidates. Maximal degree in co-relation 66532. Up to 10555 conditions per place. [2024-06-27 21:23:17,490 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-27 21:23:17,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 219 transitions, 2272 flow [2024-06-27 21:23:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 21:23:17,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:23:17,492 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1584 flow. Second operand 8 states and 196 transitions. [2024-06-27 21:23:17,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 219 transitions, 2272 flow [2024-06-27 21:23:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 219 transitions, 2142 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:17,648 INFO L231 Difference]: Finished difference. Result has 125 places, 159 transitions, 1631 flow [2024-06-27 21:23:17,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1631, PETRI_PLACES=125, PETRI_TRANSITIONS=159} [2024-06-27 21:23:17,648 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-27 21:23:17,649 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 159 transitions, 1631 flow [2024-06-27 21:23:17,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:17,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:17,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:23:17,649 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:17,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1998536346, now seen corresponding path program 3 times [2024-06-27 21:23:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381826889] [2024-06-27 21:23:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:20,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:20,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381826889] [2024-06-27 21:23:20,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381826889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:20,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:20,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106679176] [2024-06-27 21:23:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:20,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:20,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:20,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 159 transitions, 1631 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:20,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:20,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:20,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:23,661 INFO L124 PetriNetUnfolderBase]: 8015/11324 cut-off events. [2024-06-27 21:23:23,661 INFO L125 PetriNetUnfolderBase]: For 225066/225066 co-relation queries the response was YES. [2024-06-27 21:23:23,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66723 conditions, 11324 events. 8015/11324 cut-off events. For 225066/225066 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61682 event pairs, 2585 based on Foata normal form. 18/11332 useless extension candidates. Maximal degree in co-relation 66671. Up to 9636 conditions per place. [2024-06-27 21:23:23,739 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 145 selfloop transitions, 68 changer transitions 0/219 dead transitions. [2024-06-27 21:23:23,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 219 transitions, 2271 flow [2024-06-27 21:23:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 21:23:23,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 21:23:23,741 INFO L175 Difference]: Start difference. First operand has 125 places, 159 transitions, 1631 flow. Second operand 8 states and 195 transitions. [2024-06-27 21:23:23,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 219 transitions, 2271 flow [2024-06-27 21:23:23,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 219 transitions, 2124 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:23,920 INFO L231 Difference]: Finished difference. Result has 126 places, 160 transitions, 1651 flow [2024-06-27 21:23:23,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1651, PETRI_PLACES=126, PETRI_TRANSITIONS=160} [2024-06-27 21:23:23,920 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-27 21:23:23,920 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 160 transitions, 1651 flow [2024-06-27 21:23:23,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:23,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:23,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:23,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:23:23,921 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -37978970, now seen corresponding path program 1 times [2024-06-27 21:23:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952585795] [2024-06-27 21:23:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:25,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952585795] [2024-06-27 21:23:25,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952585795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:25,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:25,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:23:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111290874] [2024-06-27 21:23:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:25,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:23:25,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:23:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:23:25,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:25,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 160 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:25,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:25,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:25,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:28,081 INFO L124 PetriNetUnfolderBase]: 7563/10826 cut-off events. [2024-06-27 21:23:28,081 INFO L125 PetriNetUnfolderBase]: For 228530/228532 co-relation queries the response was YES. [2024-06-27 21:23:28,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64285 conditions, 10826 events. 7563/10826 cut-off events. For 228530/228532 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 60536 event pairs, 2952 based on Foata normal form. 10/10778 useless extension candidates. Maximal degree in co-relation 64232. Up to 10307 conditions per place. [2024-06-27 21:23:28,159 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 155 selfloop transitions, 17 changer transitions 0/194 dead transitions. [2024-06-27 21:23:28,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 194 transitions, 2231 flow [2024-06-27 21:23:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:23:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:23:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 21:23:28,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:23:28,161 INFO L175 Difference]: Start difference. First operand has 126 places, 160 transitions, 1651 flow. Second operand 5 states and 125 transitions. [2024-06-27 21:23:28,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 194 transitions, 2231 flow [2024-06-27 21:23:28,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 194 transitions, 2050 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:28,340 INFO L231 Difference]: Finished difference. Result has 126 places, 170 transitions, 1639 flow [2024-06-27 21:23:28,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1639, PETRI_PLACES=126, PETRI_TRANSITIONS=170} [2024-06-27 21:23:28,341 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-27 21:23:28,341 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 170 transitions, 1639 flow [2024-06-27 21:23:28,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:28,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:28,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:28,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:23:28,341 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:28,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1182114796, now seen corresponding path program 1 times [2024-06-27 21:23:28,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312312728] [2024-06-27 21:23:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312312728] [2024-06-27 21:23:30,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312312728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:30,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:30,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:23:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103710800] [2024-06-27 21:23:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:23:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:23:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:23:30,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:30,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 170 transitions, 1639 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:30,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:30,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:30,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:33,164 INFO L124 PetriNetUnfolderBase]: 8060/11395 cut-off events. [2024-06-27 21:23:33,164 INFO L125 PetriNetUnfolderBase]: For 253088/253092 co-relation queries the response was YES. [2024-06-27 21:23:33,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70029 conditions, 11395 events. 8060/11395 cut-off events. For 253088/253092 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62180 event pairs, 2961 based on Foata normal form. 6/11397 useless extension candidates. Maximal degree in co-relation 69974. Up to 11135 conditions per place. [2024-06-27 21:23:33,244 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 180 selfloop transitions, 21 changer transitions 0/207 dead transitions. [2024-06-27 21:23:33,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 207 transitions, 2365 flow [2024-06-27 21:23:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:23:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:23:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 21:23:33,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-27 21:23:33,246 INFO L175 Difference]: Start difference. First operand has 126 places, 170 transitions, 1639 flow. Second operand 6 states and 139 transitions. [2024-06-27 21:23:33,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 207 transitions, 2365 flow [2024-06-27 21:23:33,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 207 transitions, 2307 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-27 21:23:33,448 INFO L231 Difference]: Finished difference. Result has 131 places, 178 transitions, 1792 flow [2024-06-27 21:23:33,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1792, PETRI_PLACES=131, PETRI_TRANSITIONS=178} [2024-06-27 21:23:33,449 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-27 21:23:33,449 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 178 transitions, 1792 flow [2024-06-27 21:23:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:33,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:33,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:33,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:23:33,449 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:33,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash -489527056, now seen corresponding path program 2 times [2024-06-27 21:23:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:33,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873128358] [2024-06-27 21:23:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:35,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:35,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873128358] [2024-06-27 21:23:35,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873128358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:35,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:35,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:23:35,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787539118] [2024-06-27 21:23:35,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:35,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:23:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:23:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:23:35,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:35,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 1792 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:35,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:35,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:35,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:37,715 INFO L124 PetriNetUnfolderBase]: 8053/11386 cut-off events. [2024-06-27 21:23:37,715 INFO L125 PetriNetUnfolderBase]: For 276814/276818 co-relation queries the response was YES. [2024-06-27 21:23:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72113 conditions, 11386 events. 8053/11386 cut-off events. For 276814/276818 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62150 event pairs, 2961 based on Foata normal form. 6/11388 useless extension candidates. Maximal degree in co-relation 72055. Up to 11139 conditions per place. [2024-06-27 21:23:37,806 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 177 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2024-06-27 21:23:37,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 2244 flow [2024-06-27 21:23:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:23:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:23:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:23:37,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 21:23:37,807 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 1792 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:23:37,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 2244 flow [2024-06-27 21:23:38,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 200 transitions, 2112 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-27 21:23:38,114 INFO L231 Difference]: Finished difference. Result has 134 places, 178 transitions, 1708 flow [2024-06-27 21:23:38,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1708, PETRI_PLACES=134, PETRI_TRANSITIONS=178} [2024-06-27 21:23:38,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-27 21:23:38,115 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 178 transitions, 1708 flow [2024-06-27 21:23:38,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:38,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:38,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:38,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:23:38,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:38,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1831832743, now seen corresponding path program 1 times [2024-06-27 21:23:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:38,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544223809] [2024-06-27 21:23:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:40,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544223809] [2024-06-27 21:23:40,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544223809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:40,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:40,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484597217] [2024-06-27 21:23:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:40,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:40,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:41,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:41,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 178 transitions, 1708 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:41,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:41,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:41,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:43,774 INFO L124 PetriNetUnfolderBase]: 8101/11570 cut-off events. [2024-06-27 21:23:43,774 INFO L125 PetriNetUnfolderBase]: For 304749/304777 co-relation queries the response was YES. [2024-06-27 21:23:43,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73798 conditions, 11570 events. 8101/11570 cut-off events. For 304749/304777 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64690 event pairs, 2917 based on Foata normal form. 20/11525 useless extension candidates. Maximal degree in co-relation 73738. Up to 10639 conditions per place. [2024-06-27 21:23:43,868 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 184 selfloop transitions, 51 changer transitions 0/257 dead transitions. [2024-06-27 21:23:43,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 257 transitions, 2780 flow [2024-06-27 21:23:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 21:23:43,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:23:43,870 INFO L175 Difference]: Start difference. First operand has 134 places, 178 transitions, 1708 flow. Second operand 9 states and 216 transitions. [2024-06-27 21:23:43,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 257 transitions, 2780 flow [2024-06-27 21:23:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 257 transitions, 2746 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:44,134 INFO L231 Difference]: Finished difference. Result has 141 places, 202 transitions, 2079 flow [2024-06-27 21:23:44,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2079, PETRI_PLACES=141, PETRI_TRANSITIONS=202} [2024-06-27 21:23:44,134 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-27 21:23:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 202 transitions, 2079 flow [2024-06-27 21:23:44,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:44,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:44,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:44,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:23:44,135 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:44,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1987366853, now seen corresponding path program 2 times [2024-06-27 21:23:44,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:44,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791074718] [2024-06-27 21:23:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:44,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:46,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:46,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791074718] [2024-06-27 21:23:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791074718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:46,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882602558] [2024-06-27 21:23:46,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:46,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:46,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:46,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 202 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:46,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:46,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:46,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:49,532 INFO L124 PetriNetUnfolderBase]: 8143/11628 cut-off events. [2024-06-27 21:23:49,532 INFO L125 PetriNetUnfolderBase]: For 334680/334708 co-relation queries the response was YES. [2024-06-27 21:23:49,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78135 conditions, 11628 events. 8143/11628 cut-off events. For 334680/334708 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65055 event pairs, 2897 based on Foata normal form. 20/11583 useless extension candidates. Maximal degree in co-relation 78072. Up to 10683 conditions per place. [2024-06-27 21:23:49,626 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 173 selfloop transitions, 52 changer transitions 0/247 dead transitions. [2024-06-27 21:23:49,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 247 transitions, 2799 flow [2024-06-27 21:23:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:23:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:23:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 21:23:49,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-27 21:23:49,628 INFO L175 Difference]: Start difference. First operand has 141 places, 202 transitions, 2079 flow. Second operand 7 states and 170 transitions. [2024-06-27 21:23:49,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 247 transitions, 2799 flow [2024-06-27 21:23:49,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 247 transitions, 2699 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-27 21:23:49,951 INFO L231 Difference]: Finished difference. Result has 147 places, 208 transitions, 2232 flow [2024-06-27 21:23:49,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2232, PETRI_PLACES=147, PETRI_TRANSITIONS=208} [2024-06-27 21:23:49,952 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-27 21:23:49,952 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 208 transitions, 2232 flow [2024-06-27 21:23:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:49,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:49,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:49,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:23:49,953 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:49,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash 841107063, now seen corresponding path program 3 times [2024-06-27 21:23:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:49,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644590974] [2024-06-27 21:23:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:49,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:52,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:52,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644590974] [2024-06-27 21:23:52,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644590974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:52,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:52,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379485548] [2024-06-27 21:23:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:52,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:52,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:52,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:23:52,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 208 transitions, 2232 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:52,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:52,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:23:52,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:55,626 INFO L124 PetriNetUnfolderBase]: 8227/11752 cut-off events. [2024-06-27 21:23:55,626 INFO L125 PetriNetUnfolderBase]: For 353859/353930 co-relation queries the response was YES. [2024-06-27 21:23:55,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80241 conditions, 11752 events. 8227/11752 cut-off events. For 353859/353930 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 65861 event pairs, 2926 based on Foata normal form. 31/11704 useless extension candidates. Maximal degree in co-relation 80175. Up to 10497 conditions per place. [2024-06-27 21:23:55,737 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 170 selfloop transitions, 64 changer transitions 0/256 dead transitions. [2024-06-27 21:23:55,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 256 transitions, 3118 flow [2024-06-27 21:23:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:23:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:23:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 21:23:55,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-27 21:23:55,738 INFO L175 Difference]: Start difference. First operand has 147 places, 208 transitions, 2232 flow. Second operand 6 states and 151 transitions. [2024-06-27 21:23:55,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 256 transitions, 3118 flow [2024-06-27 21:23:56,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 256 transitions, 2983 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:56,380 INFO L231 Difference]: Finished difference. Result has 150 places, 222 transitions, 2478 flow [2024-06-27 21:23:56,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2478, PETRI_PLACES=150, PETRI_TRANSITIONS=222} [2024-06-27 21:23:56,381 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-27 21:23:56,381 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 222 transitions, 2478 flow [2024-06-27 21:23:56,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:56,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:56,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:56,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:23:56,382 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:23:56,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2009148775, now seen corresponding path program 1 times [2024-06-27 21:23:56,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:56,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333407276] [2024-06-27 21:23:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333407276] [2024-06-27 21:23:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333407276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:58,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:58,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:23:58,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633050026] [2024-06-27 21:23:58,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:58,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:23:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:23:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:23:58,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:23:58,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 222 transitions, 2478 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:58,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:58,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:23:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:01,874 INFO L124 PetriNetUnfolderBase]: 8995/12645 cut-off events. [2024-06-27 21:24:01,875 INFO L125 PetriNetUnfolderBase]: For 366475/366475 co-relation queries the response was YES. [2024-06-27 21:24:01,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88269 conditions, 12645 events. 8995/12645 cut-off events. For 366475/366475 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 68715 event pairs, 3010 based on Foata normal form. 8/12648 useless extension candidates. Maximal degree in co-relation 88201. Up to 12043 conditions per place. [2024-06-27 21:24:01,992 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 241 selfloop transitions, 37 changer transitions 0/284 dead transitions. [2024-06-27 21:24:01,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 284 transitions, 3700 flow [2024-06-27 21:24:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 21:24:01,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:24:01,994 INFO L175 Difference]: Start difference. First operand has 150 places, 222 transitions, 2478 flow. Second operand 7 states and 175 transitions. [2024-06-27 21:24:01,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 284 transitions, 3700 flow [2024-06-27 21:24:02,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 284 transitions, 3592 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-27 21:24:02,458 INFO L231 Difference]: Finished difference. Result has 158 places, 237 transitions, 2738 flow [2024-06-27 21:24:02,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2738, PETRI_PLACES=158, PETRI_TRANSITIONS=237} [2024-06-27 21:24:02,459 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-06-27 21:24:02,459 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 237 transitions, 2738 flow [2024-06-27 21:24:02,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:02,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:02,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:24:02,460 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:02,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1987551365, now seen corresponding path program 2 times [2024-06-27 21:24:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:02,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872685118] [2024-06-27 21:24:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:04,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:04,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872685118] [2024-06-27 21:24:04,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872685118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:04,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:04,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:04,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301405780] [2024-06-27 21:24:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:04,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:04,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 237 transitions, 2738 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:04,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:04,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:04,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:07,549 INFO L124 PetriNetUnfolderBase]: 9073/12759 cut-off events. [2024-06-27 21:24:07,549 INFO L125 PetriNetUnfolderBase]: For 390784/390784 co-relation queries the response was YES. [2024-06-27 21:24:07,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89955 conditions, 12759 events. 9073/12759 cut-off events. For 390784/390784 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 69319 event pairs, 3019 based on Foata normal form. 8/12762 useless extension candidates. Maximal degree in co-relation 89882. Up to 12203 conditions per place. [2024-06-27 21:24:07,671 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 31 changer transitions 0/281 dead transitions. [2024-06-27 21:24:07,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 281 transitions, 3750 flow [2024-06-27 21:24:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 21:24:07,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-27 21:24:07,673 INFO L175 Difference]: Start difference. First operand has 158 places, 237 transitions, 2738 flow. Second operand 6 states and 151 transitions. [2024-06-27 21:24:07,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 281 transitions, 3750 flow [2024-06-27 21:24:08,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 281 transitions, 3605 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:08,188 INFO L231 Difference]: Finished difference. Result has 163 places, 243 transitions, 2807 flow [2024-06-27 21:24:08,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2807, PETRI_PLACES=163, PETRI_TRANSITIONS=243} [2024-06-27 21:24:08,189 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-27 21:24:08,189 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 243 transitions, 2807 flow [2024-06-27 21:24:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:08,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:08,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:08,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:24:08,190 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:08,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1987758755, now seen corresponding path program 3 times [2024-06-27 21:24:08,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:08,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592809470] [2024-06-27 21:24:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:08,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592809470] [2024-06-27 21:24:10,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592809470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:10,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:10,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:10,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80594279] [2024-06-27 21:24:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:10,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:10,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 243 transitions, 2807 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:10,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:10,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:10,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:13,708 INFO L124 PetriNetUnfolderBase]: 9099/12804 cut-off events. [2024-06-27 21:24:13,708 INFO L125 PetriNetUnfolderBase]: For 412334/412338 co-relation queries the response was YES. [2024-06-27 21:24:13,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91210 conditions, 12804 events. 9099/12804 cut-off events. For 412334/412338 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 69718 event pairs, 2991 based on Foata normal form. 12/12812 useless extension candidates. Maximal degree in co-relation 91134. Up to 12229 conditions per place. [2024-06-27 21:24:13,822 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 253 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-27 21:24:13,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 298 transitions, 3773 flow [2024-06-27 21:24:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 21:24:13,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-27 21:24:13,824 INFO L175 Difference]: Start difference. First operand has 163 places, 243 transitions, 2807 flow. Second operand 8 states and 194 transitions. [2024-06-27 21:24:13,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 298 transitions, 3773 flow [2024-06-27 21:24:14,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 298 transitions, 3639 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:14,237 INFO L231 Difference]: Finished difference. Result has 167 places, 248 transitions, 2865 flow [2024-06-27 21:24:14,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=167, PETRI_TRANSITIONS=248} [2024-06-27 21:24:14,238 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-27 21:24:14,238 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 248 transitions, 2865 flow [2024-06-27 21:24:14,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:14,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:14,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:14,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:24:14,238 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:14,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1987766691, now seen corresponding path program 1 times [2024-06-27 21:24:14,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:14,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501987625] [2024-06-27 21:24:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:17,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501987625] [2024-06-27 21:24:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501987625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:17,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:17,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:17,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314377170] [2024-06-27 21:24:17,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:17,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:17,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:17,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:24:17,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 248 transitions, 2865 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:17,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:17,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:24:17,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:20,383 INFO L124 PetriNetUnfolderBase]: 8508/12177 cut-off events. [2024-06-27 21:24:20,383 INFO L125 PetriNetUnfolderBase]: For 427737/427817 co-relation queries the response was YES. [2024-06-27 21:24:20,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87692 conditions, 12177 events. 8508/12177 cut-off events. For 427737/427817 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 68520 event pairs, 2944 based on Foata normal form. 20/12135 useless extension candidates. Maximal degree in co-relation 87615. Up to 11444 conditions per place. [2024-06-27 21:24:20,514 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 244 selfloop transitions, 20 changer transitions 0/286 dead transitions. [2024-06-27 21:24:20,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 286 transitions, 3669 flow [2024-06-27 21:24:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:24:20,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:24:20,516 INFO L175 Difference]: Start difference. First operand has 167 places, 248 transitions, 2865 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:24:20,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 286 transitions, 3669 flow [2024-06-27 21:24:21,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 286 transitions, 3521 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 21:24:21,141 INFO L231 Difference]: Finished difference. Result has 167 places, 251 transitions, 2850 flow [2024-06-27 21:24:21,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2850, PETRI_PLACES=167, PETRI_TRANSITIONS=251} [2024-06-27 21:24:21,141 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-27 21:24:21,142 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 251 transitions, 2850 flow [2024-06-27 21:24:21,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:21,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:21,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:21,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:24:21,142 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:21,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash 947473459, now seen corresponding path program 1 times [2024-06-27 21:24:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:21,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600019515] [2024-06-27 21:24:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:24,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600019515] [2024-06-27 21:24:24,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600019515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:24,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:24,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418982982] [2024-06-27 21:24:24,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:24,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:24,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:24,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:24,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 251 transitions, 2850 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:24,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:24,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:24,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:27,460 INFO L124 PetriNetUnfolderBase]: 9228/12975 cut-off events. [2024-06-27 21:24:27,460 INFO L125 PetriNetUnfolderBase]: For 478911/478923 co-relation queries the response was YES. [2024-06-27 21:24:27,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94312 conditions, 12975 events. 9228/12975 cut-off events. For 478911/478923 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70886 event pairs, 3086 based on Foata normal form. 14/12984 useless extension candidates. Maximal degree in co-relation 94234. Up to 12445 conditions per place. [2024-06-27 21:24:27,596 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 241 selfloop transitions, 61 changer transitions 0/308 dead transitions. [2024-06-27 21:24:27,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 308 transitions, 4142 flow [2024-06-27 21:24:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 21:24:27,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-27 21:24:27,598 INFO L175 Difference]: Start difference. First operand has 167 places, 251 transitions, 2850 flow. Second operand 7 states and 171 transitions. [2024-06-27 21:24:27,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 308 transitions, 4142 flow [2024-06-27 21:24:28,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 308 transitions, 4045 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:28,232 INFO L231 Difference]: Finished difference. Result has 170 places, 263 transitions, 3206 flow [2024-06-27 21:24:28,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3206, PETRI_PLACES=170, PETRI_TRANSITIONS=263} [2024-06-27 21:24:28,233 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-27 21:24:28,233 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 263 transitions, 3206 flow [2024-06-27 21:24:28,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:28,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:28,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:28,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:24:28,234 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:28,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash 952235059, now seen corresponding path program 2 times [2024-06-27 21:24:28,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:28,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800146284] [2024-06-27 21:24:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:31,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800146284] [2024-06-27 21:24:31,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800146284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:31,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:31,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:31,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189366439] [2024-06-27 21:24:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:31,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:31,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:31,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:31,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:31,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:31,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 263 transitions, 3206 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:31,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:31,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:31,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:34,521 INFO L124 PetriNetUnfolderBase]: 9266/13032 cut-off events. [2024-06-27 21:24:34,521 INFO L125 PetriNetUnfolderBase]: For 513508/513512 co-relation queries the response was YES. [2024-06-27 21:24:34,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96819 conditions, 13032 events. 9266/13032 cut-off events. For 513508/513512 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71180 event pairs, 3068 based on Foata normal form. 6/13035 useless extension candidates. Maximal degree in co-relation 96740. Up to 12591 conditions per place. [2024-06-27 21:24:34,634 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 263 selfloop transitions, 41 changer transitions 0/310 dead transitions. [2024-06-27 21:24:34,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 310 transitions, 4083 flow [2024-06-27 21:24:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:24:34,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-27 21:24:34,636 INFO L175 Difference]: Start difference. First operand has 170 places, 263 transitions, 3206 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:24:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 310 transitions, 4083 flow [2024-06-27 21:24:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 310 transitions, 3908 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:35,296 INFO L231 Difference]: Finished difference. Result has 175 places, 271 transitions, 3287 flow [2024-06-27 21:24:35,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3287, PETRI_PLACES=175, PETRI_TRANSITIONS=271} [2024-06-27 21:24:35,297 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-27 21:24:35,297 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 271 transitions, 3287 flow [2024-06-27 21:24:35,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:35,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:35,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:35,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:24:35,297 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:35,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2143583283, now seen corresponding path program 3 times [2024-06-27 21:24:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:35,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031539729] [2024-06-27 21:24:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:38,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:38,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031539729] [2024-06-27 21:24:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031539729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:38,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:38,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139795317] [2024-06-27 21:24:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:38,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:38,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:38,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:38,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:38,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:38,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 271 transitions, 3287 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:38,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:38,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:38,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:41,413 INFO L124 PetriNetUnfolderBase]: 9285/13062 cut-off events. [2024-06-27 21:24:41,413 INFO L125 PetriNetUnfolderBase]: For 534757/534797 co-relation queries the response was YES. [2024-06-27 21:24:41,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97137 conditions, 13062 events. 9285/13062 cut-off events. For 534757/534797 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71425 event pairs, 3086 based on Foata normal form. 31/13086 useless extension candidates. Maximal degree in co-relation 97056. Up to 12510 conditions per place. [2024-06-27 21:24:41,814 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 244 selfloop transitions, 68 changer transitions 0/318 dead transitions. [2024-06-27 21:24:41,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 318 transitions, 4401 flow [2024-06-27 21:24:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:24:41,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-27 21:24:41,816 INFO L175 Difference]: Start difference. First operand has 175 places, 271 transitions, 3287 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:24:41,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 318 transitions, 4401 flow [2024-06-27 21:24:42,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 318 transitions, 4255 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:42,392 INFO L231 Difference]: Finished difference. Result has 177 places, 275 transitions, 3385 flow [2024-06-27 21:24:42,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3385, PETRI_PLACES=177, PETRI_TRANSITIONS=275} [2024-06-27 21:24:42,393 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-27 21:24:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 275 transitions, 3385 flow [2024-06-27 21:24:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:42,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:24:42,393 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:42,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2140908493, now seen corresponding path program 4 times [2024-06-27 21:24:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:42,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751833127] [2024-06-27 21:24:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:42,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:45,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:45,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751833127] [2024-06-27 21:24:45,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751833127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:45,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:45,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:45,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57217205] [2024-06-27 21:24:45,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:45,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:45,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:45,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 275 transitions, 3385 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:45,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:45,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:48,464 INFO L124 PetriNetUnfolderBase]: 9304/13087 cut-off events. [2024-06-27 21:24:48,464 INFO L125 PetriNetUnfolderBase]: For 556964/556999 co-relation queries the response was YES. [2024-06-27 21:24:48,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98163 conditions, 13087 events. 9304/13087 cut-off events. For 556964/556999 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71550 event pairs, 3086 based on Foata normal form. 27/13107 useless extension candidates. Maximal degree in co-relation 98081. Up to 12530 conditions per place. [2024-06-27 21:24:48,598 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 235 selfloop transitions, 74 changer transitions 0/315 dead transitions. [2024-06-27 21:24:48,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 315 transitions, 4351 flow [2024-06-27 21:24:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:24:48,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:24:48,601 INFO L175 Difference]: Start difference. First operand has 177 places, 275 transitions, 3385 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:24:48,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 315 transitions, 4351 flow [2024-06-27 21:24:49,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 315 transitions, 4083 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 21:24:49,310 INFO L231 Difference]: Finished difference. Result has 178 places, 279 transitions, 3380 flow [2024-06-27 21:24:49,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3380, PETRI_PLACES=178, PETRI_TRANSITIONS=279} [2024-06-27 21:24:49,310 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-27 21:24:49,310 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 279 transitions, 3380 flow [2024-06-27 21:24:49,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:49,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:49,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:49,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:24:49,311 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:49,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:49,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1107754699, now seen corresponding path program 5 times [2024-06-27 21:24:49,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:49,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046681113] [2024-06-27 21:24:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:49,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046681113] [2024-06-27 21:24:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046681113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:51,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407740998] [2024-06-27 21:24:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:51,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:51,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:51,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:51,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 279 transitions, 3380 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:51,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:51,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:51,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:54,960 INFO L124 PetriNetUnfolderBase]: 9297/13069 cut-off events. [2024-06-27 21:24:54,960 INFO L125 PetriNetUnfolderBase]: For 577243/577265 co-relation queries the response was YES. [2024-06-27 21:24:55,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98431 conditions, 13069 events. 9297/13069 cut-off events. For 577243/577265 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71388 event pairs, 3109 based on Foata normal form. 17/13076 useless extension candidates. Maximal degree in co-relation 98349. Up to 12477 conditions per place. [2024-06-27 21:24:55,097 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 229 selfloop transitions, 80 changer transitions 0/315 dead transitions. [2024-06-27 21:24:55,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 315 transitions, 4250 flow [2024-06-27 21:24:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 21:24:55,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 21:24:55,099 INFO L175 Difference]: Start difference. First operand has 178 places, 279 transitions, 3380 flow. Second operand 6 states and 148 transitions. [2024-06-27 21:24:55,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 315 transitions, 4250 flow [2024-06-27 21:24:56,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 315 transitions, 4015 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:56,030 INFO L231 Difference]: Finished difference. Result has 180 places, 279 transitions, 3323 flow [2024-06-27 21:24:56,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3323, PETRI_PLACES=180, PETRI_TRANSITIONS=279} [2024-06-27 21:24:56,031 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-27 21:24:56,031 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 279 transitions, 3323 flow [2024-06-27 21:24:56,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:56,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:56,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:24:56,032 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:24:56,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash 304164091, now seen corresponding path program 6 times [2024-06-27 21:24:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:56,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129056288] [2024-06-27 21:24:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129056288] [2024-06-27 21:24:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129056288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:59,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:59,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843015458] [2024-06-27 21:24:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:59,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:24:59,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 279 transitions, 3323 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:59,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:59,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:24:59,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:02,683 INFO L124 PetriNetUnfolderBase]: 9290/13064 cut-off events. [2024-06-27 21:25:02,683 INFO L125 PetriNetUnfolderBase]: For 597931/597935 co-relation queries the response was YES. [2024-06-27 21:25:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98895 conditions, 13064 events. 9290/13064 cut-off events. For 597931/597935 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71321 event pairs, 3067 based on Foata normal form. 6/13067 useless extension candidates. Maximal degree in co-relation 98812. Up to 12470 conditions per place. [2024-06-27 21:25:02,818 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 247 selfloop transitions, 82 changer transitions 0/335 dead transitions. [2024-06-27 21:25:02,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 335 transitions, 4155 flow [2024-06-27 21:25:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 21:25:02,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:25:02,819 INFO L175 Difference]: Start difference. First operand has 180 places, 279 transitions, 3323 flow. Second operand 8 states and 196 transitions. [2024-06-27 21:25:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 335 transitions, 4155 flow [2024-06-27 21:25:03,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 335 transitions, 3865 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:03,676 INFO L231 Difference]: Finished difference. Result has 181 places, 279 transitions, 3240 flow [2024-06-27 21:25:03,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3240, PETRI_PLACES=181, PETRI_TRANSITIONS=279} [2024-06-27 21:25:03,676 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-27 21:25:03,677 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 279 transitions, 3240 flow [2024-06-27 21:25:03,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:03,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:03,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:03,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:25:03,677 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:03,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2143757517, now seen corresponding path program 1 times [2024-06-27 21:25:03,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:03,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892455383] [2024-06-27 21:25:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:03,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:06,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:06,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892455383] [2024-06-27 21:25:06,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892455383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:06,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:06,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:25:06,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724662998] [2024-06-27 21:25:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:06,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:25:06,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:06,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:25:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:25:06,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:06,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 279 transitions, 3240 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:06,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:06,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:09,901 INFO L124 PetriNetUnfolderBase]: 9322/13106 cut-off events. [2024-06-27 21:25:09,901 INFO L125 PetriNetUnfolderBase]: For 596019/596023 co-relation queries the response was YES. [2024-06-27 21:25:09,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99281 conditions, 13106 events. 9322/13106 cut-off events. For 596019/596023 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71606 event pairs, 2923 based on Foata normal form. 8/13110 useless extension candidates. Maximal degree in co-relation 99198. Up to 12681 conditions per place. [2024-06-27 21:25:10,030 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 290 selfloop transitions, 29 changer transitions 0/325 dead transitions. [2024-06-27 21:25:10,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 325 transitions, 4316 flow [2024-06-27 21:25:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:25:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:25:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:25:10,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-27 21:25:10,032 INFO L175 Difference]: Start difference. First operand has 181 places, 279 transitions, 3240 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:25:10,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 325 transitions, 4316 flow [2024-06-27 21:25:10,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 325 transitions, 4122 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:25:10,566 INFO L231 Difference]: Finished difference. Result has 180 places, 285 transitions, 3310 flow [2024-06-27 21:25:10,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3310, PETRI_PLACES=180, PETRI_TRANSITIONS=285} [2024-06-27 21:25:10,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-27 21:25:10,567 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 285 transitions, 3310 flow [2024-06-27 21:25:10,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:10,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:10,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:10,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:25:10,567 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:10,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:10,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1053830923, now seen corresponding path program 2 times [2024-06-27 21:25:10,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:10,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605105896] [2024-06-27 21:25:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:13,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:13,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605105896] [2024-06-27 21:25:13,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605105896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:13,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:13,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:25:13,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523808301] [2024-06-27 21:25:13,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:25:13,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:25:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:25:13,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:13,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 285 transitions, 3310 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:13,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:13,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:13,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:16,810 INFO L124 PetriNetUnfolderBase]: 9354/13151 cut-off events. [2024-06-27 21:25:16,810 INFO L125 PetriNetUnfolderBase]: For 582778/582782 co-relation queries the response was YES. [2024-06-27 21:25:16,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99573 conditions, 13151 events. 9354/13151 cut-off events. For 582778/582782 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71776 event pairs, 3073 based on Foata normal form. 8/13155 useless extension candidates. Maximal degree in co-relation 99490. Up to 12803 conditions per place. [2024-06-27 21:25:16,923 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 291 selfloop transitions, 24 changer transitions 0/321 dead transitions. [2024-06-27 21:25:16,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 321 transitions, 4132 flow [2024-06-27 21:25:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:25:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:25:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 21:25:16,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:25:16,925 INFO L175 Difference]: Start difference. First operand has 180 places, 285 transitions, 3310 flow. Second operand 7 states and 156 transitions. [2024-06-27 21:25:16,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 321 transitions, 4132 flow [2024-06-27 21:25:17,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 321 transitions, 3967 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-27 21:25:17,510 INFO L231 Difference]: Finished difference. Result has 184 places, 288 transitions, 3305 flow [2024-06-27 21:25:17,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3305, PETRI_PLACES=184, PETRI_TRANSITIONS=288} [2024-06-27 21:25:17,510 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-27 21:25:17,510 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 288 transitions, 3305 flow [2024-06-27 21:25:17,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:17,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:17,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:17,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:25:17,511 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:17,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1484547029, now seen corresponding path program 3 times [2024-06-27 21:25:17,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:17,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917014021] [2024-06-27 21:25:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:17,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:20,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:20,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917014021] [2024-06-27 21:25:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917014021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:20,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:20,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:25:20,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838385891] [2024-06-27 21:25:20,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:20,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:25:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:25:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:25:20,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:20,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 288 transitions, 3305 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:20,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:20,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:20,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:23,485 INFO L124 PetriNetUnfolderBase]: 9342/13134 cut-off events. [2024-06-27 21:25:23,485 INFO L125 PetriNetUnfolderBase]: For 602513/602517 co-relation queries the response was YES. [2024-06-27 21:25:23,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99580 conditions, 13134 events. 9342/13134 cut-off events. For 602513/602517 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71663 event pairs, 2921 based on Foata normal form. 8/13138 useless extension candidates. Maximal degree in co-relation 99495. Up to 12760 conditions per place. [2024-06-27 21:25:23,607 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 291 selfloop transitions, 23 changer transitions 0/320 dead transitions. [2024-06-27 21:25:23,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 320 transitions, 4025 flow [2024-06-27 21:25:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:25:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:25:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 21:25:23,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-27 21:25:23,609 INFO L175 Difference]: Start difference. First operand has 184 places, 288 transitions, 3305 flow. Second operand 6 states and 142 transitions. [2024-06-27 21:25:23,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 320 transitions, 4025 flow [2024-06-27 21:25:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 320 transitions, 3869 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:24,396 INFO L231 Difference]: Finished difference. Result has 185 places, 288 transitions, 3207 flow [2024-06-27 21:25:24,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3207, PETRI_PLACES=185, PETRI_TRANSITIONS=288} [2024-06-27 21:25:24,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-27 21:25:24,397 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 288 transitions, 3207 flow [2024-06-27 21:25:24,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:24,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:24,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:24,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:25:24,398 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:24,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1741166529, now seen corresponding path program 1 times [2024-06-27 21:25:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462312342] [2024-06-27 21:25:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:26,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462312342] [2024-06-27 21:25:26,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462312342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:26,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:26,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:25:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002934254] [2024-06-27 21:25:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:26,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:25:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:25:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:25:26,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:25:26,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 288 transitions, 3207 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:26,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:26,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:25:26,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:29,360 INFO L124 PetriNetUnfolderBase]: 8183/11869 cut-off events. [2024-06-27 21:25:29,360 INFO L125 PetriNetUnfolderBase]: For 618973/619431 co-relation queries the response was YES. [2024-06-27 21:25:29,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92140 conditions, 11869 events. 8183/11869 cut-off events. For 618973/619431 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 68913 event pairs, 2808 based on Foata normal form. 8/11686 useless extension candidates. Maximal degree in co-relation 92054. Up to 10877 conditions per place. [2024-06-27 21:25:29,463 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 227 selfloop transitions, 18 changer transitions 0/306 dead transitions. [2024-06-27 21:25:29,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 306 transitions, 3745 flow [2024-06-27 21:25:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:25:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:25:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 21:25:29,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 21:25:29,465 INFO L175 Difference]: Start difference. First operand has 185 places, 288 transitions, 3207 flow. Second operand 5 states and 122 transitions. [2024-06-27 21:25:29,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 306 transitions, 3745 flow [2024-06-27 21:25:30,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 306 transitions, 3677 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:30,114 INFO L231 Difference]: Finished difference. Result has 185 places, 288 transitions, 3185 flow [2024-06-27 21:25:30,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3185, PETRI_PLACES=185, PETRI_TRANSITIONS=288} [2024-06-27 21:25:30,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-27 21:25:30,115 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 288 transitions, 3185 flow [2024-06-27 21:25:30,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:30,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:30,116 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] [2024-06-27 21:25:30,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:25:30,116 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:25:30,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1222861511, now seen corresponding path program 1 times [2024-06-27 21:25:30,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:30,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837007143] [2024-06-27 21:25:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:34,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837007143] [2024-06-27 21:25:34,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837007143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:34,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:34,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621766383] [2024-06-27 21:25:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:34,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:34,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:34,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:25:34,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 288 transitions, 3185 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:34,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:34,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:25:34,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand