./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.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/safe027_power.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/safe027_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe027_power.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 21:28:57,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:28:58,036 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:28:58,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:28:58,048 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:28:58,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:28:58,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:28:58,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:28:58,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:28:58,091 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:28:58,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:28:58,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:28:58,092 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:28:58,093 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:28:58,094 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:28:58,094 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:28:58,094 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:28:58,094 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:28:58,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:28:58,095 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:28:58,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:28:58,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:28:58,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:28:58,097 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:28:58,097 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:28:58,097 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:28:58,098 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:28:58,098 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:28:58,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:28:58,099 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:28:58,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:28:58,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:28:58,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:28:58,100 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:28:58,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:28:58,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:28:58,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:28:58,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:28:58,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:28:58,102 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:28:58,102 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:28:58,102 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:28:58,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:28:58,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:28:58,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:28:58,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:28:58,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:28:58,380 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:28:58,381 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:28:58,382 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-27 21:28:59,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:28:59,814 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:28:59,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-27 21:28:59,840 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3e0573f/b4518839d4c7446f80252970d88fd5c2/FLAGc0d9b3249 [2024-06-27 21:28:59,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3e0573f/b4518839d4c7446f80252970d88fd5c2 [2024-06-27 21:28:59,855 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:28:59,860 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:28:59,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe027_power.oepc.yml/witness.yml [2024-06-27 21:29:00,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:29:00,162 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:29:00,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:29:00,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:29:00,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:29:00,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:28:59" (1/2) ... [2024-06-27 21:29:00,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b41e379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:29:00, skipping insertion in model container [2024-06-27 21:29:00,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:28:59" (1/2) ... [2024-06-27 21:29:00,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61facd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:29:00, skipping insertion in model container [2024-06-27 21:29:00,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:29:00" (2/2) ... [2024-06-27 21:29:00,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b41e379 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:29:00, skipping insertion in model container [2024-06-27 21:29:00,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:29:00" (2/2) ... [2024-06-27 21:29:00,174 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:29:00,408 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:29:00,410 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:29:00,410 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_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))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:29:00,410 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:29:00,411 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_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))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 21:29:00,411 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:29:00,412 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-27 21:29:00,457 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:29:00,838 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:29:00,852 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 21:29:01,006 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:29:01,039 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:29:01,039 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:29:01 WrapperNode [2024-06-27 21:29:01,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:29:01,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:29:01,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:29:01,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:29:01,047 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,087 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,127 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 198 [2024-06-27 21:29:01,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:29:01,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:29:01,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:29:01,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:29:01,139 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,139 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,144 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,169 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 21:29:01,169 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,170 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,207 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,262 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,275 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,277 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:29:01,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:29:01,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:29:01,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:29:01,289 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 09:29:01" (1/1) ... [2024-06-27 21:29:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:29:01,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:29:01,321 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 21:29:01,350 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 21:29:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:29:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:29:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:29:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:29:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:29:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:29:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:29:01,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:29:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:29:01,375 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:29:01,375 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:29:01,375 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:29:01,375 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:29:01,376 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:29:01,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:29:01,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:29:01,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:29:01,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:29:01,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:29:01,379 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 21:29:01,554 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:29:01,556 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:29:02,121 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:29:02,122 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:29:02,552 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:29:02,553 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:29:02,553 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:29:02 BoogieIcfgContainer [2024-06-27 21:29:02,553 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:29:02,555 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:29:02,555 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:29:02,559 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:29:02,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:28:59" (1/4) ... [2024-06-27 21:29:02,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9325b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:29:02, skipping insertion in model container [2024-06-27 21:29:02,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:29:00" (2/4) ... [2024-06-27 21:29:02,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9325b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:29:02, skipping insertion in model container [2024-06-27 21:29:02,560 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 09:29:01" (3/4) ... [2024-06-27 21:29:02,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9325b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:29:02, skipping insertion in model container [2024-06-27 21:29:02,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:29:02" (4/4) ... [2024-06-27 21:29:02,562 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2024-06-27 21:29:02,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:29:02,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:29:02,580 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:29:02,694 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:29:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:29:02,779 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:29:02,779 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:29:02,781 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 21:29:02,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:29:02,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:29:02,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:29:02,807 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;@1f351c06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:29:02,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:29:02,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:29:02,815 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:29:02,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:29:02,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:02,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:29:02,817 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 21:29:02,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 768987070, now seen corresponding path program 1 times [2024-06-27 21:29:02,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:02,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085837043] [2024-06-27 21:29:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:02,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:05,155 INFO 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 21:29:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085837043] [2024-06-27 21:29:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085837043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:05,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:05,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:29:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689017731] [2024-06-27 21:29:05,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:05,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:29:05,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:05,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:29:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:29:05,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 21:29:05,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 21:29:05,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:05,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 21:29:05,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:06,813 INFO L124 PetriNetUnfolderBase]: 3447/4934 cut-off events. [2024-06-27 21:29:06,813 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-27 21:29:06,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 4934 events. 3447/4934 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26307 event pairs, 2102 based on Foata normal form. 2/4844 useless extension candidates. Maximal degree in co-relation 9919. Up to 4797 conditions per place. [2024-06-27 21:29:06,849 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-27 21:29:06,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 241 flow [2024-06-27 21:29:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:29:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:29:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-27 21:29:06,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 21:29:06,862 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-27 21:29:06,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 241 flow [2024-06-27 21:29:06,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:06,868 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:29:06,870 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 21:29:06,873 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:29:06,874 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:29:06,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 21:29:06,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:06,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:29:06,875 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 21:29:06,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash 262241565, now seen corresponding path program 1 times [2024-06-27 21:29:06,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:06,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926266059] [2024-06-27 21:29:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:10,370 INFO 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 21:29:10,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:10,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926266059] [2024-06-27 21:29:10,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926266059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:10,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:10,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:29:10,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442908787] [2024-06-27 21:29:10,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:10,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:29:10,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:29:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:29:10,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 21:29:10,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:10,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:10,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 21:29:10,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:12,083 INFO L124 PetriNetUnfolderBase]: 3430/4977 cut-off events. [2024-06-27 21:29:12,084 INFO L125 PetriNetUnfolderBase]: For 1039/1067 co-relation queries the response was YES. [2024-06-27 21:29:12,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11562 conditions, 4977 events. 3430/4977 cut-off events. For 1039/1067 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26759 event pairs, 1986 based on Foata normal form. 6/4964 useless extension candidates. Maximal degree in co-relation 11550. Up to 4730 conditions per place. [2024-06-27 21:29:12,120 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-06-27 21:29:12,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 349 flow [2024-06-27 21:29:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:29:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:29:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-27 21:29:12,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 21:29:12,124 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 128 transitions. [2024-06-27 21:29:12,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 349 flow [2024-06-27 21:29:12,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:29:12,132 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-27 21:29:12,133 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 21:29:12,134 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-27 21:29:12,134 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-27 21:29:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:12,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:12,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:29:12,140 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 21:29:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -105677146, now seen corresponding path program 1 times [2024-06-27 21:29:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726791834] [2024-06-27 21:29:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:16,258 INFO 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 21:29:16,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726791834] [2024-06-27 21:29:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726791834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:16,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:16,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:29:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014857428] [2024-06-27 21:29:16,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:16,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:29:16,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:29:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:29:16,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:29:16,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 21:29:16,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:16,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:29:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:18,568 INFO L124 PetriNetUnfolderBase]: 4421/6343 cut-off events. [2024-06-27 21:29:18,569 INFO L125 PetriNetUnfolderBase]: For 3844/3904 co-relation queries the response was YES. [2024-06-27 21:29:18,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16595 conditions, 6343 events. 4421/6343 cut-off events. For 3844/3904 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33932 event pairs, 1887 based on Foata normal form. 24/6347 useless extension candidates. Maximal degree in co-relation 16581. Up to 5862 conditions per place. [2024-06-27 21:29:18,609 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-27 21:29:18,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 111 transitions, 552 flow [2024-06-27 21:29:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:29:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:29:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 21:29:18,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 21:29:18,613 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 184 transitions. [2024-06-27 21:29:18,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 111 transitions, 552 flow [2024-06-27 21:29:18,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 524 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:29:18,617 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 231 flow [2024-06-27 21:29:18,617 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=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 21:29:18,618 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-27 21:29:18,618 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 231 flow [2024-06-27 21:29:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 21:29:18,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:18,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:29:18,619 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 21:29:18,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1475752419, now seen corresponding path program 1 times [2024-06-27 21:29:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052462857] [2024-06-27 21:29:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:18,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:20,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052462857] [2024-06-27 21:29:20,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052462857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:20,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:20,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:29:20,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045505540] [2024-06-27 21:29:20,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:20,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:29:20,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:29:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:29:20,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:20,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:20,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:20,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:20,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:22,900 INFO L124 PetriNetUnfolderBase]: 5539/7855 cut-off events. [2024-06-27 21:29:22,900 INFO L125 PetriNetUnfolderBase]: For 8059/8059 co-relation queries the response was YES. [2024-06-27 21:29:22,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22197 conditions, 7855 events. 5539/7855 cut-off events. For 8059/8059 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41383 event pairs, 2800 based on Foata normal form. 3/7855 useless extension candidates. Maximal degree in co-relation 22180. Up to 7625 conditions per place. [2024-06-27 21:29:22,944 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 21:29:22,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 480 flow [2024-06-27 21:29:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:29:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:29:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 21:29:22,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 21:29:22,947 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 231 flow. Second operand 5 states and 122 transitions. [2024-06-27 21:29:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 480 flow [2024-06-27 21:29:22,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:22,960 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 290 flow [2024-06-27 21:29:22,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 21:29:22,962 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 21:29:22,963 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 290 flow [2024-06-27 21:29:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:22,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:22,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:22,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:29:22,964 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 21:29:22,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash -15968452, now seen corresponding path program 1 times [2024-06-27 21:29:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:22,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954951645] [2024-06-27 21:29:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:26,478 INFO 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 21:29:26,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:26,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954951645] [2024-06-27 21:29:26,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954951645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:26,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:26,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:29:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924625924] [2024-06-27 21:29:26,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:26,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:29:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:29:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:29:26,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:26,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:26,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:26,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:26,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:28,751 INFO L124 PetriNetUnfolderBase]: 5566/7887 cut-off events. [2024-06-27 21:29:28,751 INFO L125 PetriNetUnfolderBase]: For 11592/11592 co-relation queries the response was YES. [2024-06-27 21:29:28,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24329 conditions, 7887 events. 5566/7887 cut-off events. For 11592/11592 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41581 event pairs, 2657 based on Foata normal form. 3/7885 useless extension candidates. Maximal degree in co-relation 24309. Up to 7594 conditions per place. [2024-06-27 21:29:28,802 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 85 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-27 21:29:28,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 112 transitions, 675 flow [2024-06-27 21:29:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:29:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:29:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 21:29:28,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-27 21:29:28,805 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 290 flow. Second operand 6 states and 155 transitions. [2024-06-27 21:29:28,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 112 transitions, 675 flow [2024-06-27 21:29:28,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 21:29:28,813 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 413 flow [2024-06-27 21:29:28,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-27 21:29:28,814 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-27 21:29:28,814 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 413 flow [2024-06-27 21:29:28,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:28,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:28,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:28,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:29:28,815 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 21:29:28,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash -5641732, now seen corresponding path program 2 times [2024-06-27 21:29:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:28,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441031875] [2024-06-27 21:29:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:31,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:31,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441031875] [2024-06-27 21:29:31,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441031875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:31,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:31,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:29:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656426044] [2024-06-27 21:29:31,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:31,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:29:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:31,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:29:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:29:31,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:31,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:31,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:31,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:31,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:34,038 INFO L124 PetriNetUnfolderBase]: 5557/7885 cut-off events. [2024-06-27 21:29:34,038 INFO L125 PetriNetUnfolderBase]: For 16948/16961 co-relation queries the response was YES. [2024-06-27 21:29:34,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26600 conditions, 7885 events. 5557/7885 cut-off events. For 16948/16961 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41518 event pairs, 2675 based on Foata normal form. 13/7893 useless extension candidates. Maximal degree in co-relation 26576. Up to 7585 conditions per place. [2024-06-27 21:29:34,089 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 78 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-06-27 21:29:34,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 694 flow [2024-06-27 21:29:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:29:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:29:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 21:29:34,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 21:29:34,092 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 413 flow. Second operand 6 states and 148 transitions. [2024-06-27 21:29:34,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 694 flow [2024-06-27 21:29:34,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:34,117 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 427 flow [2024-06-27 21:29:34,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 21:29:34,118 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 21:29:34,118 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 427 flow [2024-06-27 21:29:34,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:34,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:34,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:34,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:29:34,119 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 21:29:34,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash -858823556, now seen corresponding path program 1 times [2024-06-27 21:29:34,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314996235] [2024-06-27 21:29:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:36,372 INFO 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 21:29:36,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:36,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314996235] [2024-06-27 21:29:36,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314996235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:36,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:36,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:29:36,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568871210] [2024-06-27 21:29:36,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:36,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:29:36,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:29:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:29:36,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:36,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:36,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:36,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:36,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:38,401 INFO L124 PetriNetUnfolderBase]: 5542/7863 cut-off events. [2024-06-27 21:29:38,401 INFO L125 PetriNetUnfolderBase]: For 19247/19247 co-relation queries the response was YES. [2024-06-27 21:29:38,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26763 conditions, 7863 events. 5542/7863 cut-off events. For 19247/19247 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41360 event pairs, 2523 based on Foata normal form. 6/7866 useless extension candidates. Maximal degree in co-relation 26738. Up to 7591 conditions per place. [2024-06-27 21:29:38,435 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-27 21:29:38,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 733 flow [2024-06-27 21:29:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:29:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:29:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 21:29:38,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-27 21:29:38,437 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 427 flow. Second operand 6 states and 146 transitions. [2024-06-27 21:29:38,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 733 flow [2024-06-27 21:29:38,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:38,449 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 458 flow [2024-06-27 21:29:38,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-27 21:29:38,450 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 21:29:38,450 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 458 flow [2024-06-27 21:29:38,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:38,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:38,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:38,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:29:38,451 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 21:29:38,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1031107476, now seen corresponding path program 1 times [2024-06-27 21:29:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:38,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263751370] [2024-06-27 21:29:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:38,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:42,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263751370] [2024-06-27 21:29:42,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263751370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:42,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:42,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:42,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817953136] [2024-06-27 21:29:42,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:42,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:42,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:42,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:42,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:42,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:42,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:42,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:42,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:42,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:44,536 INFO L124 PetriNetUnfolderBase]: 5607/7986 cut-off events. [2024-06-27 21:29:44,536 INFO L125 PetriNetUnfolderBase]: For 24976/24976 co-relation queries the response was YES. [2024-06-27 21:29:44,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28619 conditions, 7986 events. 5607/7986 cut-off events. For 24976/24976 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 42746 event pairs, 2297 based on Foata normal form. 7/7989 useless extension candidates. Maximal degree in co-relation 28592. Up to 7544 conditions per place. [2024-06-27 21:29:44,576 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 25 changer transitions 0/136 dead transitions. [2024-06-27 21:29:44,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 884 flow [2024-06-27 21:29:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 21:29:44,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-27 21:29:44,578 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 458 flow. Second operand 7 states and 186 transitions. [2024-06-27 21:29:44,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 884 flow [2024-06-27 21:29:44,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 846 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:44,593 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 528 flow [2024-06-27 21:29:44,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-27 21:29:44,594 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-27 21:29:44,594 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 528 flow [2024-06-27 21:29:44,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:44,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:44,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:44,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:29:44,595 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 21:29:44,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1031102826, now seen corresponding path program 2 times [2024-06-27 21:29:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:44,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391611807] [2024-06-27 21:29:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:44,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:48,119 INFO 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 21:29:48,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:48,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391611807] [2024-06-27 21:29:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391611807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:48,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:48,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845229053] [2024-06-27 21:29:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:48,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:48,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:48,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:48,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:48,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:48,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:50,478 INFO L124 PetriNetUnfolderBase]: 5634/8008 cut-off events. [2024-06-27 21:29:50,478 INFO L125 PetriNetUnfolderBase]: For 32173/32173 co-relation queries the response was YES. [2024-06-27 21:29:50,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31347 conditions, 8008 events. 5634/8008 cut-off events. For 32173/32173 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42405 event pairs, 2484 based on Foata normal form. 3/8006 useless extension candidates. Maximal degree in co-relation 31319. Up to 7601 conditions per place. [2024-06-27 21:29:50,518 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-27 21:29:50,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 144 transitions, 1094 flow [2024-06-27 21:29:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 21:29:50,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-27 21:29:50,520 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 528 flow. Second operand 7 states and 181 transitions. [2024-06-27 21:29:50,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 144 transitions, 1094 flow [2024-06-27 21:29:50,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 144 transitions, 998 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:50,537 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 686 flow [2024-06-27 21:29:50,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=686, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2024-06-27 21:29:50,538 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-27 21:29:50,539 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 686 flow [2024-06-27 21:29:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:50,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:50,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:29:50,539 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 21:29:50,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 336181492, now seen corresponding path program 3 times [2024-06-27 21:29:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:50,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503531507] [2024-06-27 21:29:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:54,096 INFO 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 21:29:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503531507] [2024-06-27 21:29:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503531507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396012590] [2024-06-27 21:29:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:54,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:54,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 686 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:54,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:54,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:54,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:56,479 INFO L124 PetriNetUnfolderBase]: 5625/7999 cut-off events. [2024-06-27 21:29:56,480 INFO L125 PetriNetUnfolderBase]: For 41308/41308 co-relation queries the response was YES. [2024-06-27 21:29:56,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33415 conditions, 7999 events. 5625/7999 cut-off events. For 41308/41308 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42223 event pairs, 2501 based on Foata normal form. 3/7994 useless extension candidates. Maximal degree in co-relation 33384. Up to 7592 conditions per place. [2024-06-27 21:29:56,527 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 96 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-27 21:29:56,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 138 transitions, 1057 flow [2024-06-27 21:29:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 21:29:56,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-27 21:29:56,529 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 686 flow. Second operand 7 states and 174 transitions. [2024-06-27 21:29:56,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 138 transitions, 1057 flow [2024-06-27 21:29:56,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 21:29:56,558 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 714 flow [2024-06-27 21:29:56,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=714, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-27 21:29:56,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-27 21:29:56,559 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 714 flow [2024-06-27 21:29:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:56,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:56,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:29:56,560 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 21:29:56,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash 544731709, now seen corresponding path program 1 times [2024-06-27 21:29:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:56,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128235683] [2024-06-27 21:29:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:56,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:58,988 INFO 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 21:29:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128235683] [2024-06-27 21:29:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128235683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802798179] [2024-06-27 21:29:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:58,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:59,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:29:59,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 714 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:29:59,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:59,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:29:59,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:01,809 INFO L124 PetriNetUnfolderBase]: 5958/8466 cut-off events. [2024-06-27 21:30:01,809 INFO L125 PetriNetUnfolderBase]: For 49000/49000 co-relation queries the response was YES. [2024-06-27 21:30:01,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36263 conditions, 8466 events. 5958/8466 cut-off events. For 49000/49000 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44672 event pairs, 2504 based on Foata normal form. 18/8479 useless extension candidates. Maximal degree in co-relation 36230. Up to 7924 conditions per place. [2024-06-27 21:30:01,854 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 138 selfloop transitions, 54 changer transitions 0/199 dead transitions. [2024-06-27 21:30:01,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 1616 flow [2024-06-27 21:30:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:30:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:30:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-27 21:30:01,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597902097902098 [2024-06-27 21:30:01,857 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 714 flow. Second operand 11 states and 263 transitions. [2024-06-27 21:30:01,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 1616 flow [2024-06-27 21:30:01,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 199 transitions, 1530 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:30:01,914 INFO L231 Difference]: Finished difference. Result has 99 places, 134 transitions, 1116 flow [2024-06-27 21:30:01,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=99, PETRI_TRANSITIONS=134} [2024-06-27 21:30:01,915 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 21:30:01,915 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 134 transitions, 1116 flow [2024-06-27 21:30:01,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:01,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:01,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:01,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:30:01,916 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 21:30:01,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1834230235, now seen corresponding path program 2 times [2024-06-27 21:30:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808787172] [2024-06-27 21:30:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:05,348 INFO 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 21:30:05,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808787172] [2024-06-27 21:30:05,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808787172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:05,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:05,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:05,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873016843] [2024-06-27 21:30:05,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:05,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:05,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:05,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:05,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 1116 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:05,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:05,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:05,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:07,710 INFO L124 PetriNetUnfolderBase]: 6002/8534 cut-off events. [2024-06-27 21:30:07,711 INFO L125 PetriNetUnfolderBase]: For 66184/66184 co-relation queries the response was YES. [2024-06-27 21:30:07,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 8534 events. 6002/8534 cut-off events. For 66184/66184 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45202 event pairs, 2470 based on Foata normal form. 6/8535 useless extension candidates. Maximal degree in co-relation 40074. Up to 8063 conditions per place. [2024-06-27 21:30:07,791 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 136 selfloop transitions, 42 changer transitions 0/185 dead transitions. [2024-06-27 21:30:07,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 185 transitions, 1670 flow [2024-06-27 21:30:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:30:07,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:30:07,793 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 1116 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:30:07,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 185 transitions, 1670 flow [2024-06-27 21:30:07,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1612 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 21:30:07,857 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1226 flow [2024-06-27 21:30:07,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-27 21:30:07,858 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-27 21:30:07,858 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1226 flow [2024-06-27 21:30:07,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:07,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:07,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:07,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:30:07,859 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 21:30:07,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1831698813, now seen corresponding path program 3 times [2024-06-27 21:30:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:07,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583442608] [2024-06-27 21:30:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:11,297 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 21:30:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583442608] [2024-06-27 21:30:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583442608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:11,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637147726] [2024-06-27 21:30:11,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:11,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:11,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1226 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:11,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:11,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:11,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:13,594 INFO L124 PetriNetUnfolderBase]: 6046/8608 cut-off events. [2024-06-27 21:30:13,594 INFO L125 PetriNetUnfolderBase]: For 77022/77035 co-relation queries the response was YES. [2024-06-27 21:30:13,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42199 conditions, 8608 events. 6046/8608 cut-off events. For 77022/77035 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45590 event pairs, 2490 based on Foata normal form. 16/8617 useless extension candidates. Maximal degree in co-relation 42158. Up to 8165 conditions per place. [2024-06-27 21:30:13,668 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2024-06-27 21:30:13,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 1766 flow [2024-06-27 21:30:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 21:30:13,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-27 21:30:13,670 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1226 flow. Second operand 7 states and 172 transitions. [2024-06-27 21:30:13,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 1766 flow [2024-06-27 21:30:13,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1652 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:13,764 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1253 flow [2024-06-27 21:30:13,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1253, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-27 21:30:13,765 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-27 21:30:13,765 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1253 flow [2024-06-27 21:30:13,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:13,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:13,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:30:13,766 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 21:30:13,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -695680997, now seen corresponding path program 4 times [2024-06-27 21:30:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631043908] [2024-06-27 21:30:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:16,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:16,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631043908] [2024-06-27 21:30:16,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631043908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:16,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:16,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:16,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978211650] [2024-06-27 21:30:16,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:16,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:16,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:16,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:16,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1253 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:16,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:16,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:18,820 INFO L124 PetriNetUnfolderBase]: 6031/8595 cut-off events. [2024-06-27 21:30:18,820 INFO L125 PetriNetUnfolderBase]: For 87165/87178 co-relation queries the response was YES. [2024-06-27 21:30:18,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43340 conditions, 8595 events. 6031/8595 cut-off events. For 87165/87178 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45687 event pairs, 2285 based on Foata normal form. 16/8604 useless extension candidates. Maximal degree in co-relation 43298. Up to 7974 conditions per place. [2024-06-27 21:30:18,882 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 132 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-27 21:30:18,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1799 flow [2024-06-27 21:30:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 21:30:18,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-27 21:30:18,884 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1253 flow. Second operand 7 states and 173 transitions. [2024-06-27 21:30:18,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1799 flow [2024-06-27 21:30:18,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 189 transitions, 1668 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:18,953 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1288 flow [2024-06-27 21:30:18,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1288, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-27 21:30:18,953 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-27 21:30:18,954 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1288 flow [2024-06-27 21:30:18,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:30:18,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:18,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:18,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:30:18,954 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 21:30:18,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1497248609, now seen corresponding path program 1 times [2024-06-27 21:30:18,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:18,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95885316] [2024-06-27 21:30:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:18,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:22,692 INFO 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 21:30:22,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:22,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95885316] [2024-06-27 21:30:22,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95885316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:22,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:22,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:22,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621309899] [2024-06-27 21:30:22,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:22,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:22,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:22,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:22,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:22,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1288 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:22,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:22,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:22,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:25,588 INFO L124 PetriNetUnfolderBase]: 7473/10766 cut-off events. [2024-06-27 21:30:25,588 INFO L125 PetriNetUnfolderBase]: For 130456/130456 co-relation queries the response was YES. [2024-06-27 21:30:25,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 10766 events. 7473/10766 cut-off events. For 130456/130456 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 61237 event pairs, 2129 based on Foata normal form. 78/10840 useless extension candidates. Maximal degree in co-relation 55367. Up to 8230 conditions per place. [2024-06-27 21:30:25,659 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 192 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-27 21:30:25,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 239 transitions, 2224 flow [2024-06-27 21:30:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 21:30:25,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-27 21:30:25,662 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1288 flow. Second operand 9 states and 248 transitions. [2024-06-27 21:30:25,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 239 transitions, 2224 flow [2024-06-27 21:30:25,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 239 transitions, 2084 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:25,790 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1357 flow [2024-06-27 21:30:25,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-06-27 21:30:25,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-27 21:30:25,791 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1357 flow [2024-06-27 21:30:25,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:25,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:25,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:25,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:30:25,792 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 21:30:25,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1243199403, now seen corresponding path program 2 times [2024-06-27 21:30:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:25,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830321774] [2024-06-27 21:30:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:25,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:29,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:29,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830321774] [2024-06-27 21:30:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830321774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:29,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:29,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354867969] [2024-06-27 21:30:29,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:29,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:29,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:29,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:29,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1357 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:29,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:29,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:29,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:32,063 INFO L124 PetriNetUnfolderBase]: 7247/10474 cut-off events. [2024-06-27 21:30:32,063 INFO L125 PetriNetUnfolderBase]: For 137805/137805 co-relation queries the response was YES. [2024-06-27 21:30:32,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54164 conditions, 10474 events. 7247/10474 cut-off events. For 137805/137805 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59667 event pairs, 2633 based on Foata normal form. 92/10562 useless extension candidates. Maximal degree in co-relation 54119. Up to 9080 conditions per place. [2024-06-27 21:30:32,140 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 178 selfloop transitions, 36 changer transitions 0/221 dead transitions. [2024-06-27 21:30:32,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 221 transitions, 2024 flow [2024-06-27 21:30:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 21:30:32,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-27 21:30:32,142 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1357 flow. Second operand 8 states and 215 transitions. [2024-06-27 21:30:32,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 221 transitions, 2024 flow [2024-06-27 21:30:32,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 221 transitions, 1940 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:32,320 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1381 flow [2024-06-27 21:30:32,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-27 21:30:32,321 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-27 21:30:32,321 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1381 flow [2024-06-27 21:30:32,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:32,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:32,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:32,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:30:32,322 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 21:30:32,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1247668053, now seen corresponding path program 3 times [2024-06-27 21:30:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58640773] [2024-06-27 21:30:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:36,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:36,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58640773] [2024-06-27 21:30:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58640773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:36,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:36,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:36,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078566307] [2024-06-27 21:30:36,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:36,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:36,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:36,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:36,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:36,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:36,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:36,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:36,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:38,976 INFO L124 PetriNetUnfolderBase]: 7532/10877 cut-off events. [2024-06-27 21:30:38,977 INFO L125 PetriNetUnfolderBase]: For 137379/137382 co-relation queries the response was YES. [2024-06-27 21:30:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56458 conditions, 10877 events. 7532/10877 cut-off events. For 137379/137382 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 62279 event pairs, 2784 based on Foata normal form. 24/10888 useless extension candidates. Maximal degree in co-relation 56411. Up to 10000 conditions per place. [2024-06-27 21:30:39,053 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 157 selfloop transitions, 70 changer transitions 0/234 dead transitions. [2024-06-27 21:30:39,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 234 transitions, 2333 flow [2024-06-27 21:30:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 21:30:39,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-06-27 21:30:39,056 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1381 flow. Second operand 9 states and 218 transitions. [2024-06-27 21:30:39,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 234 transitions, 2333 flow [2024-06-27 21:30:39,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 2242 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:39,172 INFO L231 Difference]: Finished difference. Result has 123 places, 176 transitions, 1818 flow [2024-06-27 21:30:39,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1818, PETRI_PLACES=123, PETRI_TRANSITIONS=176} [2024-06-27 21:30:39,173 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-27 21:30:39,173 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 176 transitions, 1818 flow [2024-06-27 21:30:39,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:39,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:39,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:39,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:30:39,174 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 21:30:39,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1026563607, now seen corresponding path program 1 times [2024-06-27 21:30:39,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710900778] [2024-06-27 21:30:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:43,491 INFO 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 21:30:43,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:43,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710900778] [2024-06-27 21:30:43,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710900778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:43,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:43,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985121018] [2024-06-27 21:30:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:43,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:43,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:43,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:43,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 176 transitions, 1818 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:43,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:43,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:46,355 INFO L124 PetriNetUnfolderBase]: 7854/11385 cut-off events. [2024-06-27 21:30:46,355 INFO L125 PetriNetUnfolderBase]: For 161989/161989 co-relation queries the response was YES. [2024-06-27 21:30:46,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61281 conditions, 11385 events. 7854/11385 cut-off events. For 161989/161989 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 65850 event pairs, 2781 based on Foata normal form. 18/11398 useless extension candidates. Maximal degree in co-relation 61229. Up to 9772 conditions per place. [2024-06-27 21:30:46,446 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 159 selfloop transitions, 79 changer transitions 0/245 dead transitions. [2024-06-27 21:30:46,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 245 transitions, 2725 flow [2024-06-27 21:30:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 21:30:46,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-27 21:30:46,449 INFO L175 Difference]: Start difference. First operand has 123 places, 176 transitions, 1818 flow. Second operand 8 states and 209 transitions. [2024-06-27 21:30:46,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 245 transitions, 2725 flow [2024-06-27 21:30:46,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 245 transitions, 2642 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 21:30:46,671 INFO L231 Difference]: Finished difference. Result has 130 places, 181 transitions, 2051 flow [2024-06-27 21:30:46,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2051, PETRI_PLACES=130, PETRI_TRANSITIONS=181} [2024-06-27 21:30:46,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-27 21:30:46,672 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 181 transitions, 2051 flow [2024-06-27 21:30:46,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:46,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:46,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:46,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:30:46,673 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 21:30:46,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:46,674 INFO L85 PathProgramCache]: Analyzing trace with hash 947310429, now seen corresponding path program 4 times [2024-06-27 21:30:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:46,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028581148] [2024-06-27 21:30:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:50,384 INFO 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 21:30:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028581148] [2024-06-27 21:30:50,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028581148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:50,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701615331] [2024-06-27 21:30:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:50,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:50,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:50,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:50,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 181 transitions, 2051 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:50,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:50,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:50,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:53,411 INFO L124 PetriNetUnfolderBase]: 7951/11555 cut-off events. [2024-06-27 21:30:53,411 INFO L125 PetriNetUnfolderBase]: For 181782/181784 co-relation queries the response was YES. [2024-06-27 21:30:53,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63603 conditions, 11555 events. 7951/11555 cut-off events. For 181782/181784 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67186 event pairs, 2858 based on Foata normal form. 24/11566 useless extension candidates. Maximal degree in co-relation 63548. Up to 10637 conditions per place. [2024-06-27 21:30:53,497 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 162 selfloop transitions, 69 changer transitions 0/238 dead transitions. [2024-06-27 21:30:53,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 238 transitions, 2749 flow [2024-06-27 21:30:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 21:30:53,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:30:53,500 INFO L175 Difference]: Start difference. First operand has 130 places, 181 transitions, 2051 flow. Second operand 8 states and 200 transitions. [2024-06-27 21:30:53,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 238 transitions, 2749 flow [2024-06-27 21:30:53,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 238 transitions, 2638 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:30:53,681 INFO L231 Difference]: Finished difference. Result has 134 places, 183 transitions, 2146 flow [2024-06-27 21:30:53,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2146, PETRI_PLACES=134, PETRI_TRANSITIONS=183} [2024-06-27 21:30:53,681 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-27 21:30:53,681 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 183 transitions, 2146 flow [2024-06-27 21:30:53,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:53,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:53,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:30:53,682 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 21:30:53,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1192202741, now seen corresponding path program 2 times [2024-06-27 21:30:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:53,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59095585] [2024-06-27 21:30:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:57,473 INFO 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 21:30:57,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:57,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59095585] [2024-06-27 21:30:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59095585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:57,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:57,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729682923] [2024-06-27 21:30:57,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:57,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:57,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:57,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:30:57,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 183 transitions, 2146 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:30:57,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:57,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:30:57,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:00,524 INFO L124 PetriNetUnfolderBase]: 8063/11747 cut-off events. [2024-06-27 21:31:00,524 INFO L125 PetriNetUnfolderBase]: For 197443/197445 co-relation queries the response was YES. [2024-06-27 21:31:00,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65851 conditions, 11747 events. 8063/11747 cut-off events. For 197443/197445 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 68649 event pairs, 2858 based on Foata normal form. 18/11752 useless extension candidates. Maximal degree in co-relation 65794. Up to 10619 conditions per place. [2024-06-27 21:31:00,608 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 165 selfloop transitions, 72 changer transitions 0/244 dead transitions. [2024-06-27 21:31:00,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 244 transitions, 2876 flow [2024-06-27 21:31:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 21:31:00,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-27 21:31:00,610 INFO L175 Difference]: Start difference. First operand has 134 places, 183 transitions, 2146 flow. Second operand 8 states and 203 transitions. [2024-06-27 21:31:00,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 244 transitions, 2876 flow [2024-06-27 21:31:00,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 244 transitions, 2710 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:00,787 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 2195 flow [2024-06-27 21:31:00,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2195, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-27 21:31:00,788 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-27 21:31:00,788 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 2195 flow [2024-06-27 21:31:00,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:00,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:00,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:00,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:31:00,789 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 21:31:00,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash -91273257, now seen corresponding path program 3 times [2024-06-27 21:31:00,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:00,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515901005] [2024-06-27 21:31:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:00,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:04,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515901005] [2024-06-27 21:31:04,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515901005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:04,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:04,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531083302] [2024-06-27 21:31:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:04,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:04,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:04,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:04,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 2195 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:04,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:04,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:04,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:07,312 INFO L124 PetriNetUnfolderBase]: 8024/11690 cut-off events. [2024-06-27 21:31:07,312 INFO L125 PetriNetUnfolderBase]: For 206452/206454 co-relation queries the response was YES. [2024-06-27 21:31:07,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65862 conditions, 11690 events. 8024/11690 cut-off events. For 206452/206454 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 67435 event pairs, 2543 based on Foata normal form. 18/11695 useless extension candidates. Maximal degree in co-relation 65804. Up to 9426 conditions per place. [2024-06-27 21:31:07,406 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 151 selfloop transitions, 89 changer transitions 0/247 dead transitions. [2024-06-27 21:31:07,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 247 transitions, 3011 flow [2024-06-27 21:31:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 21:31:07,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-27 21:31:07,408 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 2195 flow. Second operand 8 states and 205 transitions. [2024-06-27 21:31:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 247 transitions, 3011 flow [2024-06-27 21:31:07,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 247 transitions, 2826 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:07,612 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 2263 flow [2024-06-27 21:31:07,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2263, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-27 21:31:07,613 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-27 21:31:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 2263 flow [2024-06-27 21:31:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:07,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:31:07,614 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash -293369485, now seen corresponding path program 5 times [2024-06-27 21:31:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282040197] [2024-06-27 21:31:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:10,537 INFO 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 21:31:10,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:10,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282040197] [2024-06-27 21:31:10,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282040197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:10,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:10,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614537528] [2024-06-27 21:31:10,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:10,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:10,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:10,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 2263 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:10,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:10,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:10,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:13,832 INFO L124 PetriNetUnfolderBase]: 8244/12024 cut-off events. [2024-06-27 21:31:13,832 INFO L125 PetriNetUnfolderBase]: For 220731/220731 co-relation queries the response was YES. [2024-06-27 21:31:13,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68229 conditions, 12024 events. 8244/12024 cut-off events. For 220731/220731 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 70701 event pairs, 2852 based on Foata normal form. 24/12043 useless extension candidates. Maximal degree in co-relation 68170. Up to 10858 conditions per place. [2024-06-27 21:31:13,920 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 172 selfloop transitions, 100 changer transitions 0/279 dead transitions. [2024-06-27 21:31:13,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 279 transitions, 3326 flow [2024-06-27 21:31:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 21:31:13,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-27 21:31:13,922 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 2263 flow. Second operand 9 states and 231 transitions. [2024-06-27 21:31:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 279 transitions, 3326 flow [2024-06-27 21:31:14,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 279 transitions, 3033 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:14,219 INFO L231 Difference]: Finished difference. Result has 142 places, 215 transitions, 2590 flow [2024-06-27 21:31:14,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2590, PETRI_PLACES=142, PETRI_TRANSITIONS=215} [2024-06-27 21:31:14,219 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-27 21:31:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 215 transitions, 2590 flow [2024-06-27 21:31:14,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:14,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:14,220 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 21:31:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:31:14,220 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 21:31:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1169710274, now seen corresponding path program 1 times [2024-06-27 21:31:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656591723] [2024-06-27 21:31:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:16,209 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 21:31:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:16,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656591723] [2024-06-27 21:31:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656591723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:16,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:16,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:31:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612829008] [2024-06-27 21:31:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:31:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:31:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:31:16,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:16,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 215 transitions, 2590 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 21:31:16,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:16,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:19,056 INFO L124 PetriNetUnfolderBase]: 8282/12088 cut-off events. [2024-06-27 21:31:19,056 INFO L125 PetriNetUnfolderBase]: For 223839/223839 co-relation queries the response was YES. [2024-06-27 21:31:19,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68773 conditions, 12088 events. 8282/12088 cut-off events. For 223839/223839 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71165 event pairs, 3014 based on Foata normal form. 4/12086 useless extension candidates. Maximal degree in co-relation 68711. Up to 11532 conditions per place. [2024-06-27 21:31:19,166 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 225 selfloop transitions, 22 changer transitions 0/254 dead transitions. [2024-06-27 21:31:19,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 254 transitions, 3396 flow [2024-06-27 21:31:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:31:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:31:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 21:31:19,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:31:19,168 INFO L175 Difference]: Start difference. First operand has 142 places, 215 transitions, 2590 flow. Second operand 6 states and 147 transitions. [2024-06-27 21:31:19,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 254 transitions, 3396 flow [2024-06-27 21:31:19,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 254 transitions, 3239 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:19,494 INFO L231 Difference]: Finished difference. Result has 143 places, 223 transitions, 2622 flow [2024-06-27 21:31:19,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2622, PETRI_PLACES=143, PETRI_TRANSITIONS=223} [2024-06-27 21:31:19,494 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-27 21:31:19,494 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 223 transitions, 2622 flow [2024-06-27 21:31:19,494 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 21:31:19,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:19,495 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 21:31:19,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:31:19,495 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 21:31:19,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:19,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1079202498, now seen corresponding path program 2 times [2024-06-27 21:31:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:19,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407361177] [2024-06-27 21:31:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:19,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:21,505 INFO 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 21:31:21,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407361177] [2024-06-27 21:31:21,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407361177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:21,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:21,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:31:21,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103670403] [2024-06-27 21:31:21,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:21,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:31:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:31:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:31:21,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:21,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 223 transitions, 2622 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 21:31:21,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:21,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:21,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:24,024 INFO L124 PetriNetUnfolderBase]: 8268/12068 cut-off events. [2024-06-27 21:31:24,024 INFO L125 PetriNetUnfolderBase]: For 239706/239706 co-relation queries the response was YES. [2024-06-27 21:31:24,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70206 conditions, 12068 events. 8268/12068 cut-off events. For 239706/239706 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 71048 event pairs, 3010 based on Foata normal form. 4/12066 useless extension candidates. Maximal degree in co-relation 70143. Up to 11542 conditions per place. [2024-06-27 21:31:24,114 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 221 selfloop transitions, 18 changer transitions 0/246 dead transitions. [2024-06-27 21:31:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 246 transitions, 3172 flow [2024-06-27 21:31:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:31:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:31:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 21:31:24,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-27 21:31:24,116 INFO L175 Difference]: Start difference. First operand has 143 places, 223 transitions, 2622 flow. Second operand 5 states and 124 transitions. [2024-06-27 21:31:24,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 246 transitions, 3172 flow [2024-06-27 21:31:24,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 246 transitions, 3067 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 21:31:24,370 INFO L231 Difference]: Finished difference. Result has 146 places, 223 transitions, 2567 flow [2024-06-27 21:31:24,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2567, PETRI_PLACES=146, PETRI_TRANSITIONS=223} [2024-06-27 21:31:24,371 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-27 21:31:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 223 transitions, 2567 flow [2024-06-27 21:31:24,371 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 21:31:24,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:24,371 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 21:31:24,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:31:24,371 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 21:31:24,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 904678307, now seen corresponding path program 1 times [2024-06-27 21:31:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687898118] [2024-06-27 21:31:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:27,327 INFO 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 21:31:27,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:27,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687898118] [2024-06-27 21:31:27,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687898118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:27,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:27,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:27,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293888669] [2024-06-27 21:31:27,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:27,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:27,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:27,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:31:27,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 223 transitions, 2567 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:27,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:27,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:31:27,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:29,697 INFO L124 PetriNetUnfolderBase]: 7841/11539 cut-off events. [2024-06-27 21:31:29,697 INFO L125 PetriNetUnfolderBase]: For 248205/248231 co-relation queries the response was YES. [2024-06-27 21:31:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67445 conditions, 11539 events. 7841/11539 cut-off events. For 248205/248231 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 69144 event pairs, 2936 based on Foata normal form. 10/11470 useless extension candidates. Maximal degree in co-relation 67380. Up to 10799 conditions per place. [2024-06-27 21:31:29,801 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 207 selfloop transitions, 13 changer transitions 0/245 dead transitions. [2024-06-27 21:31:29,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 245 transitions, 3123 flow [2024-06-27 21:31:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:31:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:31:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 21:31:29,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 21:31:29,803 INFO L175 Difference]: Start difference. First operand has 146 places, 223 transitions, 2567 flow. Second operand 5 states and 122 transitions. [2024-06-27 21:31:29,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 245 transitions, 3123 flow [2024-06-27 21:31:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 245 transitions, 3087 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:30,122 INFO L231 Difference]: Finished difference. Result has 147 places, 226 transitions, 2629 flow [2024-06-27 21:31:30,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2629, PETRI_PLACES=147, PETRI_TRANSITIONS=226} [2024-06-27 21:31:30,123 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-27 21:31:30,123 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 226 transitions, 2629 flow [2024-06-27 21:31:30,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:31:30,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:30,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:30,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:31:30,124 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 21:31:30,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1052156381, now seen corresponding path program 1 times [2024-06-27 21:31:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:30,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341724963] [2024-06-27 21:31:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:33,702 INFO 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 21:31:33,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341724963] [2024-06-27 21:31:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341724963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:33,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:33,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223988102] [2024-06-27 21:31:33,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:33,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:33,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:33,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:33,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 226 transitions, 2629 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 21:31:33,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:33,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:33,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:36,953 INFO L124 PetriNetUnfolderBase]: 8346/12174 cut-off events. [2024-06-27 21:31:36,954 INFO L125 PetriNetUnfolderBase]: For 271589/271589 co-relation queries the response was YES. [2024-06-27 21:31:37,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72813 conditions, 12174 events. 8346/12174 cut-off events. For 271589/271589 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 71628 event pairs, 2820 based on Foata normal form. 4/12171 useless extension candidates. Maximal degree in co-relation 72747. Up to 11313 conditions per place. [2024-06-27 21:31:37,053 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 214 selfloop transitions, 65 changer transitions 0/286 dead transitions. [2024-06-27 21:31:37,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 286 transitions, 3783 flow [2024-06-27 21:31:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 21:31:37,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-27 21:31:37,055 INFO L175 Difference]: Start difference. First operand has 147 places, 226 transitions, 2629 flow. Second operand 7 states and 181 transitions. [2024-06-27 21:31:37,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 286 transitions, 3783 flow [2024-06-27 21:31:37,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 286 transitions, 3709 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:31:37,329 INFO L231 Difference]: Finished difference. Result has 151 places, 238 transitions, 2939 flow [2024-06-27 21:31:37,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2939, PETRI_PLACES=151, PETRI_TRANSITIONS=238} [2024-06-27 21:31:37,330 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-27 21:31:37,330 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 238 transitions, 2939 flow [2024-06-27 21:31:37,330 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 21:31:37,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:37,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:37,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:31:37,330 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 21:31:37,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash 60109947, now seen corresponding path program 2 times [2024-06-27 21:31:37,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:37,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383375272] [2024-06-27 21:31:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:37,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:40,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:40,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383375272] [2024-06-27 21:31:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383375272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:40,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:40,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:40,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207233795] [2024-06-27 21:31:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:40,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:40,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:40,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:40,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 238 transitions, 2939 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 21:31:40,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:40,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:40,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:43,578 INFO L124 PetriNetUnfolderBase]: 8498/12424 cut-off events. [2024-06-27 21:31:43,578 INFO L125 PetriNetUnfolderBase]: For 296865/296865 co-relation queries the response was YES. [2024-06-27 21:31:43,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76438 conditions, 12424 events. 8498/12424 cut-off events. For 296865/296865 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 73522 event pairs, 2671 based on Foata normal form. 4/12424 useless extension candidates. Maximal degree in co-relation 76371. Up to 11589 conditions per place. [2024-06-27 21:31:43,678 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 235 selfloop transitions, 54 changer transitions 0/296 dead transitions. [2024-06-27 21:31:43,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 296 transitions, 3860 flow [2024-06-27 21:31:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 21:31:43,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-27 21:31:43,680 INFO L175 Difference]: Start difference. First operand has 151 places, 238 transitions, 2939 flow. Second operand 7 states and 173 transitions. [2024-06-27 21:31:43,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 296 transitions, 3860 flow [2024-06-27 21:31:44,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 296 transitions, 3742 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 21:31:44,119 INFO L231 Difference]: Finished difference. Result has 156 places, 253 transitions, 3141 flow [2024-06-27 21:31:44,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3141, PETRI_PLACES=156, PETRI_TRANSITIONS=253} [2024-06-27 21:31:44,120 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2024-06-27 21:31:44,120 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 253 transitions, 3141 flow [2024-06-27 21:31:44,120 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 21:31:44,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:44,120 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 21:31:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:31:44,121 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 21:31:44,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash 544417539, now seen corresponding path program 3 times [2024-06-27 21:31:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:44,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565348484] [2024-06-27 21:31:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:44,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:47,007 INFO 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 21:31:47,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:47,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565348484] [2024-06-27 21:31:47,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565348484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:47,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:47,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934314635] [2024-06-27 21:31:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:47,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:47,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:47,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:47,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 253 transitions, 3141 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 21:31:47,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:47,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:47,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:50,019 INFO L124 PetriNetUnfolderBase]: 8536/12484 cut-off events. [2024-06-27 21:31:50,019 INFO L125 PetriNetUnfolderBase]: For 312647/312679 co-relation queries the response was YES. [2024-06-27 21:31:50,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77184 conditions, 12484 events. 8536/12484 cut-off events. For 312647/312679 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 73884 event pairs, 2799 based on Foata normal form. 28/12502 useless extension candidates. Maximal degree in co-relation 77115. Up to 11503 conditions per place. [2024-06-27 21:31:50,142 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 223 selfloop transitions, 73 changer transitions 0/303 dead transitions. [2024-06-27 21:31:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 303 transitions, 4197 flow [2024-06-27 21:31:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 21:31:50,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-27 21:31:50,144 INFO L175 Difference]: Start difference. First operand has 156 places, 253 transitions, 3141 flow. Second operand 7 states and 177 transitions. [2024-06-27 21:31:50,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 303 transitions, 4197 flow [2024-06-27 21:31:50,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 303 transitions, 4078 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 21:31:50,619 INFO L231 Difference]: Finished difference. Result has 160 places, 257 transitions, 3258 flow [2024-06-27 21:31:50,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3258, PETRI_PLACES=160, PETRI_TRANSITIONS=257} [2024-06-27 21:31:50,620 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-27 21:31:50,620 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 257 transitions, 3258 flow [2024-06-27 21:31:50,620 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 21:31:50,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:50,620 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 21:31:50,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:31:50,621 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 21:31:50,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash 544773729, now seen corresponding path program 4 times [2024-06-27 21:31:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:50,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326110594] [2024-06-27 21:31:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:50,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:53,491 INFO 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 21:31:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326110594] [2024-06-27 21:31:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326110594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229731912] [2024-06-27 21:31:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:53,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:53,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 257 transitions, 3258 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 21:31:53,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:53,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:53,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:56,585 INFO L124 PetriNetUnfolderBase]: 8574/12534 cut-off events. [2024-06-27 21:31:56,585 INFO L125 PetriNetUnfolderBase]: For 329170/329202 co-relation queries the response was YES. [2024-06-27 21:31:56,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78215 conditions, 12534 events. 8574/12534 cut-off events. For 329170/329202 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 74151 event pairs, 2799 based on Foata normal form. 28/12552 useless extension candidates. Maximal degree in co-relation 78145. Up to 11537 conditions per place. [2024-06-27 21:31:56,726 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 213 selfloop transitions, 80 changer transitions 0/300 dead transitions. [2024-06-27 21:31:56,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 300 transitions, 4178 flow [2024-06-27 21:31:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 21:31:56,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-27 21:31:56,728 INFO L175 Difference]: Start difference. First operand has 160 places, 257 transitions, 3258 flow. Second operand 7 states and 171 transitions. [2024-06-27 21:31:56,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 300 transitions, 4178 flow [2024-06-27 21:31:57,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 300 transitions, 3920 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:57,291 INFO L231 Difference]: Finished difference. Result has 161 places, 261 transitions, 3257 flow [2024-06-27 21:31:57,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3257, PETRI_PLACES=161, PETRI_TRANSITIONS=261} [2024-06-27 21:31:57,292 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-27 21:31:57,293 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 261 transitions, 3257 flow [2024-06-27 21:31:57,293 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 21:31:57,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:57,293 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 21:31:57,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:31:57,293 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 21:31:57,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash 195698775, now seen corresponding path program 5 times [2024-06-27 21:31:57,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:57,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841817229] [2024-06-27 21:31:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:57,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:00,402 INFO 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 21:32:00,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:00,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841817229] [2024-06-27 21:32:00,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841817229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:00,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:00,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:00,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045735245] [2024-06-27 21:32:00,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:00,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:00,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:00,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:00,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 261 transitions, 3257 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 21:32:00,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:00,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:00,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:03,749 INFO L124 PetriNetUnfolderBase]: 8560/12506 cut-off events. [2024-06-27 21:32:03,750 INFO L125 PetriNetUnfolderBase]: For 339637/339637 co-relation queries the response was YES. [2024-06-27 21:32:03,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78111 conditions, 12506 events. 8560/12506 cut-off events. For 339637/339637 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 73959 event pairs, 2674 based on Foata normal form. 4/12506 useless extension candidates. Maximal degree in co-relation 78041. Up to 11388 conditions per place. [2024-06-27 21:32:03,871 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 211 selfloop transitions, 108 changer transitions 0/326 dead transitions. [2024-06-27 21:32:03,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 326 transitions, 4259 flow [2024-06-27 21:32:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 21:32:03,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-27 21:32:03,873 INFO L175 Difference]: Start difference. First operand has 161 places, 261 transitions, 3257 flow. Second operand 8 states and 210 transitions. [2024-06-27 21:32:03,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 326 transitions, 4259 flow [2024-06-27 21:32:04,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 326 transitions, 4043 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:04,472 INFO L231 Difference]: Finished difference. Result has 165 places, 261 transitions, 3319 flow [2024-06-27 21:32:04,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=165, PETRI_TRANSITIONS=261} [2024-06-27 21:32:04,473 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-27 21:32:04,473 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 261 transitions, 3319 flow [2024-06-27 21:32:04,473 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 21:32:04,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:04,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:04,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:32:04,474 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 21:32:04,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2031993665, now seen corresponding path program 6 times [2024-06-27 21:32:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433728025] [2024-06-27 21:32:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:07,321 INFO 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 21:32:07,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:07,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433728025] [2024-06-27 21:32:07,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433728025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:07,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:07,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366400261] [2024-06-27 21:32:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:07,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:07,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:07,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 261 transitions, 3319 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 21:32:07,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:07,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:07,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:10,209 INFO L124 PetriNetUnfolderBase]: 8546/12486 cut-off events. [2024-06-27 21:32:10,210 INFO L125 PetriNetUnfolderBase]: For 355792/355798 co-relation queries the response was YES. [2024-06-27 21:32:10,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78618 conditions, 12486 events. 8546/12486 cut-off events. For 355792/355798 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 73787 event pairs, 2745 based on Foata normal form. 4/12473 useless extension candidates. Maximal degree in co-relation 78547. Up to 11376 conditions per place. [2024-06-27 21:32:10,319 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 189 selfloop transitions, 105 changer transitions 0/301 dead transitions. [2024-06-27 21:32:10,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 301 transitions, 4077 flow [2024-06-27 21:32:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 21:32:10,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-27 21:32:10,321 INFO L175 Difference]: Start difference. First operand has 165 places, 261 transitions, 3319 flow. Second operand 6 states and 154 transitions. [2024-06-27 21:32:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 301 transitions, 4077 flow [2024-06-27 21:32:10,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 301 transitions, 3736 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 21:32:10,771 INFO L231 Difference]: Finished difference. Result has 162 places, 261 transitions, 3206 flow [2024-06-27 21:32:10,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3206, PETRI_PLACES=162, PETRI_TRANSITIONS=261} [2024-06-27 21:32:10,772 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-27 21:32:10,772 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 261 transitions, 3206 flow [2024-06-27 21:32:10,772 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 21:32:10,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:10,772 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 21:32:10,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:32:10,772 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 21:32:10,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1261823517, now seen corresponding path program 1 times [2024-06-27 21:32:10,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:10,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203412989] [2024-06-27 21:32:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:10,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:13,228 INFO 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 21:32:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:13,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203412989] [2024-06-27 21:32:13,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203412989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:13,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:13,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123658724] [2024-06-27 21:32:13,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:13,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:13,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:13,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 261 transitions, 3206 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 21:32:13,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:13,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:13,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:16,170 INFO L124 PetriNetUnfolderBase]: 8778/12833 cut-off events. [2024-06-27 21:32:16,170 INFO L125 PetriNetUnfolderBase]: For 358465/358465 co-relation queries the response was YES. [2024-06-27 21:32:16,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80235 conditions, 12833 events. 8778/12833 cut-off events. For 358465/358465 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 76284 event pairs, 2900 based on Foata normal form. 16/12843 useless extension candidates. Maximal degree in co-relation 80164. Up to 11854 conditions per place. [2024-06-27 21:32:16,277 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 278 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2024-06-27 21:32:16,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 313 transitions, 4218 flow [2024-06-27 21:32:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:32:16,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:32:16,279 INFO L175 Difference]: Start difference. First operand has 162 places, 261 transitions, 3206 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:32:16,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 313 transitions, 4218 flow [2024-06-27 21:32:16,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 313 transitions, 3991 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:16,710 INFO L231 Difference]: Finished difference. Result has 163 places, 265 transitions, 3158 flow [2024-06-27 21:32:16,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=163, PETRI_TRANSITIONS=265} [2024-06-27 21:32:16,710 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-27 21:32:16,710 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 265 transitions, 3158 flow [2024-06-27 21:32:16,711 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 21:32:16,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:16,711 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 21:32:16,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:32:16,711 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 21:32:16,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 544781665, now seen corresponding path program 2 times [2024-06-27 21:32:16,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:16,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947169529] [2024-06-27 21:32:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:19,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:19,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947169529] [2024-06-27 21:32:19,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947169529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:19,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:19,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:19,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436919165] [2024-06-27 21:32:19,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:19,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:19,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:19,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:19,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 265 transitions, 3158 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 21:32:19,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:19,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:19,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:22,260 INFO L124 PetriNetUnfolderBase]: 8926/13038 cut-off events. [2024-06-27 21:32:22,261 INFO L125 PetriNetUnfolderBase]: For 365686/365686 co-relation queries the response was YES. [2024-06-27 21:32:22,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81712 conditions, 13038 events. 8926/13038 cut-off events. For 365686/365686 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 77552 event pairs, 3048 based on Foata normal form. 20/13052 useless extension candidates. Maximal degree in co-relation 81641. Up to 12276 conditions per place. [2024-06-27 21:32:22,391 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 275 selfloop transitions, 24 changer transitions 0/306 dead transitions. [2024-06-27 21:32:22,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 306 transitions, 3954 flow [2024-06-27 21:32:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 21:32:22,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:32:22,393 INFO L175 Difference]: Start difference. First operand has 163 places, 265 transitions, 3158 flow. Second operand 7 states and 168 transitions. [2024-06-27 21:32:22,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 306 transitions, 3954 flow [2024-06-27 21:32:22,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 306 transitions, 3886 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:22,885 INFO L231 Difference]: Finished difference. Result has 167 places, 267 transitions, 3208 flow [2024-06-27 21:32:22,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3208, PETRI_PLACES=167, PETRI_TRANSITIONS=267} [2024-06-27 21:32:22,885 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-27 21:32:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 267 transitions, 3208 flow [2024-06-27 21:32:22,885 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 21:32:22,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:22,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:32:22,886 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 21:32:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1653312993, now seen corresponding path program 3 times [2024-06-27 21:32:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875534767] [2024-06-27 21:32:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:25,391 INFO 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 21:32:25,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875534767] [2024-06-27 21:32:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875534767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:25,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:25,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488902223] [2024-06-27 21:32:25,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:25,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:25,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 267 transitions, 3208 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 21:32:25,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:25,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:25,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:28,289 INFO L124 PetriNetUnfolderBase]: 8870/12953 cut-off events. [2024-06-27 21:32:28,289 INFO L125 PetriNetUnfolderBase]: For 370130/370130 co-relation queries the response was YES. [2024-06-27 21:32:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81023 conditions, 12953 events. 8870/12953 cut-off events. For 370130/370130 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 76722 event pairs, 2918 based on Foata normal form. 20/12967 useless extension candidates. Maximal degree in co-relation 80950. Up to 12184 conditions per place. [2024-06-27 21:32:28,409 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 274 selfloop transitions, 23 changer transitions 0/304 dead transitions. [2024-06-27 21:32:28,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 304 transitions, 3938 flow [2024-06-27 21:32:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 21:32:28,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-27 21:32:28,410 INFO L175 Difference]: Start difference. First operand has 167 places, 267 transitions, 3208 flow. Second operand 6 states and 152 transitions. [2024-06-27 21:32:28,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 304 transitions, 3938 flow [2024-06-27 21:32:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 304 transitions, 3850 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:28,924 INFO L231 Difference]: Finished difference. Result has 168 places, 267 transitions, 3178 flow [2024-06-27 21:32:28,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3178, PETRI_PLACES=168, PETRI_TRANSITIONS=267} [2024-06-27 21:32:28,925 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-27 21:32:28,925 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 267 transitions, 3178 flow [2024-06-27 21:32:28,925 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 21:32:28,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:28,925 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 21:32:28,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:32:28,926 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:28,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1504798553, now seen corresponding path program 1 times [2024-06-27 21:32:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022443155] [2024-06-27 21:32:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:30,529 INFO 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 21:32:30,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022443155] [2024-06-27 21:32:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022443155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:30,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:32:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014119254] [2024-06-27 21:32:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:30,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:32:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:32:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:32:30,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:32:30,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 267 transitions, 3178 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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 21:32:30,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:30,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:32:30,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:33,012 INFO L124 PetriNetUnfolderBase]: 7900/11828 cut-off events. [2024-06-27 21:32:33,012 INFO L125 PetriNetUnfolderBase]: For 371014/371041 co-relation queries the response was YES. [2024-06-27 21:32:33,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73774 conditions, 11828 events. 7900/11828 cut-off events. For 371014/371041 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 73841 event pairs, 2860 based on Foata normal form. 13/11599 useless extension candidates. Maximal degree in co-relation 73700. Up to 10589 conditions per place. [2024-06-27 21:32:33,131 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 200 selfloop transitions, 14 changer transitions 0/289 dead transitions. [2024-06-27 21:32:33,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 289 transitions, 3718 flow [2024-06-27 21:32:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:32:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:32:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 21:32:33,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:32:33,132 INFO L175 Difference]: Start difference. First operand has 168 places, 267 transitions, 3178 flow. Second operand 5 states and 120 transitions. [2024-06-27 21:32:33,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 289 transitions, 3718 flow [2024-06-27 21:32:33,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 289 transitions, 3658 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:33,517 INFO L231 Difference]: Finished difference. Result has 169 places, 275 transitions, 3247 flow [2024-06-27 21:32:33,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3247, PETRI_PLACES=169, PETRI_TRANSITIONS=275} [2024-06-27 21:32:33,518 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-27 21:32:33,518 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 275 transitions, 3247 flow [2024-06-27 21:32:33,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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 21:32:33,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:33,518 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 21:32:33,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:32:33,519 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 21:32:33,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1711063047, now seen corresponding path program 1 times [2024-06-27 21:32:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:33,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338395028] [2024-06-27 21:32:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:37,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338395028] [2024-06-27 21:32:37,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338395028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:37,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:37,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750838104] [2024-06-27 21:32:37,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:37,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:37,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:37,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:37,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 275 transitions, 3247 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 21:32:37,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:37,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:37,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:40,472 INFO L124 PetriNetUnfolderBase]: 8892/13114 cut-off events. [2024-06-27 21:32:40,472 INFO L125 PetriNetUnfolderBase]: For 386306/386306 co-relation queries the response was YES. [2024-06-27 21:32:40,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83127 conditions, 13114 events. 8892/13114 cut-off events. For 386306/386306 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 79443 event pairs, 2801 based on Foata normal form. 4/13114 useless extension candidates. Maximal degree in co-relation 83051. Up to 12043 conditions per place. [2024-06-27 21:32:40,575 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 258 selfloop transitions, 74 changer transitions 0/339 dead transitions. [2024-06-27 21:32:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 339 transitions, 4219 flow [2024-06-27 21:32:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 21:32:40,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-27 21:32:40,577 INFO L175 Difference]: Start difference. First operand has 169 places, 275 transitions, 3247 flow. Second operand 8 states and 205 transitions. [2024-06-27 21:32:40,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 339 transitions, 4219 flow [2024-06-27 21:32:40,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 339 transitions, 4191 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-27 21:32:40,932 INFO L231 Difference]: Finished difference. Result has 176 places, 279 transitions, 3467 flow [2024-06-27 21:32:40,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3467, PETRI_PLACES=176, PETRI_TRANSITIONS=279} [2024-06-27 21:32:40,933 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-27 21:32:40,933 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 279 transitions, 3467 flow [2024-06-27 21:32:40,933 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 21:32:40,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:40,933 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 21:32:40,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:32:40,934 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 21:32:40,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1715531697, now seen corresponding path program 2 times [2024-06-27 21:32:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:40,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722154591] [2024-06-27 21:32:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:44,599 INFO 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 21:32:44,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:44,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722154591] [2024-06-27 21:32:44,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722154591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:44,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:44,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:44,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605805499] [2024-06-27 21:32:44,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:44,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:44,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:44,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:44,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 279 transitions, 3467 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 21:32:44,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:44,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:48,449 INFO L124 PetriNetUnfolderBase]: 8982/13138 cut-off events. [2024-06-27 21:32:48,449 INFO L125 PetriNetUnfolderBase]: For 418008/418008 co-relation queries the response was YES. [2024-06-27 21:32:48,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87032 conditions, 13138 events. 8982/13138 cut-off events. For 418008/418008 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 78593 event pairs, 2678 based on Foata normal form. 4/13134 useless extension candidates. Maximal degree in co-relation 86953. Up to 11556 conditions per place. [2024-06-27 21:32:48,581 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 200 selfloop transitions, 146 changer transitions 0/353 dead transitions. [2024-06-27 21:32:48,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 353 transitions, 4919 flow [2024-06-27 21:32:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 21:32:48,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-27 21:32:48,583 INFO L175 Difference]: Start difference. First operand has 176 places, 279 transitions, 3467 flow. Second operand 8 states and 209 transitions. [2024-06-27 21:32:48,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 353 transitions, 4919 flow [2024-06-27 21:32:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 353 transitions, 4726 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:49,166 INFO L231 Difference]: Finished difference. Result has 179 places, 291 transitions, 3850 flow [2024-06-27 21:32:49,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3850, PETRI_PLACES=179, PETRI_TRANSITIONS=291} [2024-06-27 21:32:49,167 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-27 21:32:49,167 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 291 transitions, 3850 flow [2024-06-27 21:32:49,167 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 21:32:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:49,167 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 21:32:49,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:32:49,167 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 21:32:49,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1715800467, now seen corresponding path program 3 times [2024-06-27 21:32:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909007927] [2024-06-27 21:32:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909007927] [2024-06-27 21:32:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909007927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:52,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:52,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381178305] [2024-06-27 21:32:52,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:52,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:52,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:52,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 291 transitions, 3850 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 21:32:52,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:52,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:52,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:56,706 INFO L124 PetriNetUnfolderBase]: 9020/13200 cut-off events. [2024-06-27 21:32:56,706 INFO L125 PetriNetUnfolderBase]: For 451358/451358 co-relation queries the response was YES. [2024-06-27 21:32:56,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90275 conditions, 13200 events. 9020/13200 cut-off events. For 451358/451358 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 79115 event pairs, 2678 based on Foata normal form. 4/13196 useless extension candidates. Maximal degree in co-relation 90195. Up to 11590 conditions per place. [2024-06-27 21:32:56,838 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 192 selfloop transitions, 152 changer transitions 0/351 dead transitions. [2024-06-27 21:32:56,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 351 transitions, 5108 flow [2024-06-27 21:32:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 21:32:56,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-27 21:32:56,840 INFO L175 Difference]: Start difference. First operand has 179 places, 291 transitions, 3850 flow. Second operand 8 states and 205 transitions. [2024-06-27 21:32:56,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 351 transitions, 5108 flow [2024-06-27 21:32:57,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 351 transitions, 4896 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:57,539 INFO L231 Difference]: Finished difference. Result has 184 places, 295 transitions, 4047 flow [2024-06-27 21:32:57,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4047, PETRI_PLACES=184, PETRI_TRANSITIONS=295} [2024-06-27 21:32:57,540 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-27 21:32:57,540 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 295 transitions, 4047 flow [2024-06-27 21:32:57,540 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 21:32:57,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:57,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:57,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:32:57,540 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 21:32:57,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2042200825, now seen corresponding path program 4 times [2024-06-27 21:32:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532036923] [2024-06-27 21:32:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:01,279 INFO 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 21:33:01,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:01,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532036923] [2024-06-27 21:33:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532036923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:01,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:01,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:01,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248625249] [2024-06-27 21:33:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:01,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:01,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:01,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 295 transitions, 4047 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 21:33:01,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:01,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:01,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:04,702 INFO L124 PetriNetUnfolderBase]: 9058/13280 cut-off events. [2024-06-27 21:33:04,702 INFO L125 PetriNetUnfolderBase]: For 470854/470854 co-relation queries the response was YES. [2024-06-27 21:33:04,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91727 conditions, 13280 events. 9058/13280 cut-off events. For 470854/470854 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 79670 event pairs, 2725 based on Foata normal form. 4/13280 useless extension candidates. Maximal degree in co-relation 91645. Up to 12333 conditions per place. [2024-06-27 21:33:04,840 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 279 selfloop transitions, 61 changer transitions 0/347 dead transitions. [2024-06-27 21:33:04,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 347 transitions, 4993 flow [2024-06-27 21:33:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 21:33:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-27 21:33:04,842 INFO L175 Difference]: Start difference. First operand has 184 places, 295 transitions, 4047 flow. Second operand 8 states and 194 transitions. [2024-06-27 21:33:04,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 347 transitions, 4993 flow [2024-06-27 21:33:05,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 347 transitions, 4704 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:05,545 INFO L231 Difference]: Finished difference. Result has 187 places, 299 transitions, 3979 flow [2024-06-27 21:33:05,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3979, PETRI_PLACES=187, PETRI_TRANSITIONS=299} [2024-06-27 21:33:05,546 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-27 21:33:05,546 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 299 transitions, 3979 flow [2024-06-27 21:33:05,546 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 21:33:05,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:05,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:05,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:33:05,547 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 21:33:05,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1863625734, now seen corresponding path program 1 times [2024-06-27 21:33:05,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:05,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962927207] [2024-06-27 21:33:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:05,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:09,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:09,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962927207] [2024-06-27 21:33:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962927207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:09,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:09,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:09,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394919352] [2024-06-27 21:33:09,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:09,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:33:09,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 299 transitions, 3979 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:33:09,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:09,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:33:09,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:13,331 INFO L124 PetriNetUnfolderBase]: 8815/13089 cut-off events. [2024-06-27 21:33:13,331 INFO L125 PetriNetUnfolderBase]: For 500440/500460 co-relation queries the response was YES. [2024-06-27 21:33:13,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90390 conditions, 13089 events. 8815/13089 cut-off events. For 500440/500460 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 80504 event pairs, 2725 based on Foata normal form. 26/13023 useless extension candidates. Maximal degree in co-relation 90307. Up to 11721 conditions per place. [2024-06-27 21:33:13,471 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 267 selfloop transitions, 59 changer transitions 0/357 dead transitions. [2024-06-27 21:33:13,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 357 transitions, 4984 flow [2024-06-27 21:33:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 21:33:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-27 21:33:13,473 INFO L175 Difference]: Start difference. First operand has 187 places, 299 transitions, 3979 flow. Second operand 8 states and 197 transitions. [2024-06-27 21:33:13,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 357 transitions, 4984 flow [2024-06-27 21:33:14,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 357 transitions, 4832 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:14,356 INFO L231 Difference]: Finished difference. Result has 191 places, 309 transitions, 4135 flow [2024-06-27 21:33:14,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4135, PETRI_PLACES=191, PETRI_TRANSITIONS=309} [2024-06-27 21:33:14,356 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-27 21:33:14,357 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 309 transitions, 4135 flow [2024-06-27 21:33:14,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:33:14,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:14,357 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 21:33:14,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:33:14,357 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:14,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash 760210739, now seen corresponding path program 5 times [2024-06-27 21:33:14,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:14,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562506900] [2024-06-27 21:33:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:18,047 INFO 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 21:33:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562506900] [2024-06-27 21:33:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562506900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:18,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321881867] [2024-06-27 21:33:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:18,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:18,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:18,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 309 transitions, 4135 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 21:33:18,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:18,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:18,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:22,079 INFO L124 PetriNetUnfolderBase]: 9328/13696 cut-off events. [2024-06-27 21:33:22,079 INFO L125 PetriNetUnfolderBase]: For 523228/523237 co-relation queries the response was YES. [2024-06-27 21:33:22,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95748 conditions, 13696 events. 9328/13696 cut-off events. For 523228/523237 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 82576 event pairs, 2779 based on Foata normal form. 4/13684 useless extension candidates. Maximal degree in co-relation 95663. Up to 11986 conditions per place. [2024-06-27 21:33:22,229 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 207 selfloop transitions, 158 changer transitions 0/372 dead transitions. [2024-06-27 21:33:22,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 372 transitions, 5491 flow [2024-06-27 21:33:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 21:33:22,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-27 21:33:22,231 INFO L175 Difference]: Start difference. First operand has 191 places, 309 transitions, 4135 flow. Second operand 8 states and 205 transitions. [2024-06-27 21:33:22,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 372 transitions, 5491 flow [2024-06-27 21:33:23,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 372 transitions, 5356 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:23,005 INFO L231 Difference]: Finished difference. Result has 194 places, 313 transitions, 4414 flow [2024-06-27 21:33:23,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4414, PETRI_PLACES=194, PETRI_TRANSITIONS=313} [2024-06-27 21:33:23,006 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-27 21:33:23,006 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 313 transitions, 4414 flow [2024-06-27 21:33:23,006 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 21:33:23,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:23,007 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 21:33:23,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:33:23,007 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 21:33:23,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash -616622995, now seen corresponding path program 6 times [2024-06-27 21:33:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:23,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124261508] [2024-06-27 21:33:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:23,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:26,992 INFO 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 21:33:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124261508] [2024-06-27 21:33:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124261508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:26,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:26,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847578303] [2024-06-27 21:33:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:26,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:26,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:27,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:27,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 313 transitions, 4414 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 21:33:27,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:27,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:27,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:31,060 INFO L124 PetriNetUnfolderBase]: 9366/13758 cut-off events. [2024-06-27 21:33:31,060 INFO L125 PetriNetUnfolderBase]: For 544372/544381 co-relation queries the response was YES. [2024-06-27 21:33:31,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97165 conditions, 13758 events. 9366/13758 cut-off events. For 544372/544381 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 83064 event pairs, 2779 based on Foata normal form. 4/13746 useless extension candidates. Maximal degree in co-relation 97079. Up to 12020 conditions per place. [2024-06-27 21:33:31,205 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 206 selfloop transitions, 160 changer transitions 0/373 dead transitions. [2024-06-27 21:33:31,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 373 transitions, 5780 flow [2024-06-27 21:33:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 21:33:31,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-27 21:33:31,208 INFO L175 Difference]: Start difference. First operand has 194 places, 313 transitions, 4414 flow. Second operand 8 states and 202 transitions. [2024-06-27 21:33:31,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 373 transitions, 5780 flow [2024-06-27 21:33:32,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 373 transitions, 5310 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:32,147 INFO L231 Difference]: Finished difference. Result has 196 places, 317 transitions, 4369 flow [2024-06-27 21:33:32,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4369, PETRI_PLACES=196, PETRI_TRANSITIONS=317} [2024-06-27 21:33:32,147 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-06-27 21:33:32,148 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 317 transitions, 4369 flow [2024-06-27 21:33:32,148 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 21:33:32,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:32,148 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 21:33:32,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:33:32,148 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:32,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash -117879081, now seen corresponding path program 7 times [2024-06-27 21:33:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:32,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083877842] [2024-06-27 21:33:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:32,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:35,945 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 21:33:35,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:35,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083877842] [2024-06-27 21:33:35,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083877842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:35,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:35,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:35,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868469464] [2024-06-27 21:33:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:35,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:35,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:36,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:36,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 317 transitions, 4369 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 21:33:36,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:36,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:40,054 INFO L124 PetriNetUnfolderBase]: 9404/13826 cut-off events. [2024-06-27 21:33:40,054 INFO L125 PetriNetUnfolderBase]: For 561517/561526 co-relation queries the response was YES. [2024-06-27 21:33:40,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97728 conditions, 13826 events. 9404/13826 cut-off events. For 561517/561526 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 83649 event pairs, 2799 based on Foata normal form. 4/13814 useless extension candidates. Maximal degree in co-relation 97641. Up to 12054 conditions per place. [2024-06-27 21:33:40,189 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 186 selfloop transitions, 175 changer transitions 0/368 dead transitions. [2024-06-27 21:33:40,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 368 transitions, 5515 flow [2024-06-27 21:33:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 21:33:40,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 21:33:40,191 INFO L175 Difference]: Start difference. First operand has 196 places, 317 transitions, 4369 flow. Second operand 8 states and 195 transitions. [2024-06-27 21:33:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 368 transitions, 5515 flow [2024-06-27 21:33:41,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 368 transitions, 5165 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:41,112 INFO L231 Difference]: Finished difference. Result has 199 places, 321 transitions, 4460 flow [2024-06-27 21:33:41,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4460, PETRI_PLACES=199, PETRI_TRANSITIONS=321} [2024-06-27 21:33:41,113 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-27 21:33:41,113 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 321 transitions, 4460 flow [2024-06-27 21:33:41,113 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 21:33:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:41,114 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 21:33:41,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:33:41,114 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:41,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1771696439, now seen corresponding path program 8 times [2024-06-27 21:33:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:41,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007093173] [2024-06-27 21:33:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:44,674 INFO 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 21:33:44,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007093173] [2024-06-27 21:33:44,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007093173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:44,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:44,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:44,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216145850] [2024-06-27 21:33:44,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:44,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:44,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:44,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:44,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:44,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:44,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 321 transitions, 4460 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 21:33:44,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:44,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:44,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:49,059 INFO L124 PetriNetUnfolderBase]: 9390/13836 cut-off events. [2024-06-27 21:33:49,059 INFO L125 PetriNetUnfolderBase]: For 578213/578213 co-relation queries the response was YES. [2024-06-27 21:33:49,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97923 conditions, 13836 events. 9390/13836 cut-off events. For 578213/578213 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 84155 event pairs, 2792 based on Foata normal form. 4/13836 useless extension candidates. Maximal degree in co-relation 97835. Up to 12352 conditions per place. [2024-06-27 21:33:49,191 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 241 selfloop transitions, 149 changer transitions 0/397 dead transitions. [2024-06-27 21:33:49,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 397 transitions, 5712 flow [2024-06-27 21:33:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 21:33:49,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-27 21:33:49,193 INFO L175 Difference]: Start difference. First operand has 199 places, 321 transitions, 4460 flow. Second operand 9 states and 237 transitions. [2024-06-27 21:33:49,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 397 transitions, 5712 flow [2024-06-27 21:33:50,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 397 transitions, 5367 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:50,125 INFO L231 Difference]: Finished difference. Result has 203 places, 321 transitions, 4447 flow [2024-06-27 21:33:50,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4447, PETRI_PLACES=203, PETRI_TRANSITIONS=321} [2024-06-27 21:33:50,126 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 148 predicate places. [2024-06-27 21:33:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 321 transitions, 4447 flow [2024-06-27 21:33:50,126 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 21:33:50,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:50,127 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 21:33:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:33:50,127 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:50,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1605197425, now seen corresponding path program 9 times [2024-06-27 21:33:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731629193] [2024-06-27 21:33:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:53,809 INFO 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 21:33:53,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731629193] [2024-06-27 21:33:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731629193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:53,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:53,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784251585] [2024-06-27 21:33:53,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:53,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:53,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:53,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:53,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 321 transitions, 4447 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 21:33:53,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:53,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:53,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:57,807 INFO L124 PetriNetUnfolderBase]: 9376/13814 cut-off events. [2024-06-27 21:33:57,807 INFO L125 PetriNetUnfolderBase]: For 597949/597958 co-relation queries the response was YES. [2024-06-27 21:33:57,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97900 conditions, 13814 events. 9376/13814 cut-off events. For 597949/597958 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 83823 event pairs, 2851 based on Foata normal form. 4/13802 useless extension candidates. Maximal degree in co-relation 97811. Up to 12340 conditions per place. [2024-06-27 21:33:57,949 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 221 selfloop transitions, 142 changer transitions 0/370 dead transitions. [2024-06-27 21:33:57,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 370 transitions, 5385 flow [2024-06-27 21:33:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 21:33:57,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-27 21:33:57,951 INFO L175 Difference]: Start difference. First operand has 203 places, 321 transitions, 4447 flow. Second operand 7 states and 180 transitions. [2024-06-27 21:33:57,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 370 transitions, 5385 flow [2024-06-27 21:33:58,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 370 transitions, 4810 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-27 21:33:58,736 INFO L231 Difference]: Finished difference. Result has 199 places, 321 transitions, 4175 flow [2024-06-27 21:33:58,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4175, PETRI_PLACES=199, PETRI_TRANSITIONS=321} [2024-06-27 21:33:58,737 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-27 21:33:58,737 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 321 transitions, 4175 flow [2024-06-27 21:33:58,737 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 21:33:58,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,738 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 21:33:58,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:33:58,738 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:58,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1428281572, now seen corresponding path program 2 times [2024-06-27 21:33:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111273345] [2024-06-27 21:33:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:03,054 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 21:34:03,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:03,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111273345] [2024-06-27 21:34:03,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111273345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:03,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:03,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:03,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208981342] [2024-06-27 21:34:03,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:03,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:03,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:34:03,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 321 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:34:03,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:03,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:34:03,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:06,616 INFO L124 PetriNetUnfolderBase]: 9102/13542 cut-off events. [2024-06-27 21:34:06,616 INFO L125 PetriNetUnfolderBase]: For 583098/583106 co-relation queries the response was YES. [2024-06-27 21:34:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95720 conditions, 13542 events. 9102/13542 cut-off events. For 583098/583106 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 83819 event pairs, 2747 based on Foata normal form. 14/13448 useless extension candidates. Maximal degree in co-relation 95631. Up to 11919 conditions per place. [2024-06-27 21:34:06,755 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 279 selfloop transitions, 65 changer transitions 0/375 dead transitions. [2024-06-27 21:34:06,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 375 transitions, 5231 flow [2024-06-27 21:34:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 21:34:06,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 21:34:06,757 INFO L175 Difference]: Start difference. First operand has 199 places, 321 transitions, 4175 flow. Second operand 7 states and 176 transitions. [2024-06-27 21:34:06,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 375 transitions, 5231 flow [2024-06-27 21:34:07,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 375 transitions, 4886 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:07,609 INFO L231 Difference]: Finished difference. Result has 199 places, 333 transitions, 4214 flow [2024-06-27 21:34:07,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4214, PETRI_PLACES=199, PETRI_TRANSITIONS=333} [2024-06-27 21:34:07,610 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-27 21:34:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 333 transitions, 4214 flow [2024-06-27 21:34:07,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:34:07,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:07,610 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 21:34:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:34:07,611 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:07,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1799179522, now seen corresponding path program 3 times [2024-06-27 21:34:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:07,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513754463] [2024-06-27 21:34:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:11,625 INFO 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 21:34:11,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:11,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513754463] [2024-06-27 21:34:11,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513754463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:11,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:11,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:11,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166794496] [2024-06-27 21:34:11,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:11,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:11,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:11,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:34:11,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 333 transitions, 4214 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:34:11,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:11,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:34:11,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:15,426 INFO L124 PetriNetUnfolderBase]: 9280/13805 cut-off events. [2024-06-27 21:34:15,426 INFO L125 PetriNetUnfolderBase]: For 595747/595802 co-relation queries the response was YES. [2024-06-27 21:34:15,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98598 conditions, 13805 events. 9280/13805 cut-off events. For 595747/595802 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 85681 event pairs, 2793 based on Foata normal form. 35/13721 useless extension candidates. Maximal degree in co-relation 98508. Up to 12355 conditions per place. [2024-06-27 21:34:15,577 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 277 selfloop transitions, 74 changer transitions 0/382 dead transitions. [2024-06-27 21:34:15,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 382 transitions, 5260 flow [2024-06-27 21:34:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 21:34:15,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-06-27 21:34:15,579 INFO L175 Difference]: Start difference. First operand has 199 places, 333 transitions, 4214 flow. Second operand 9 states and 202 transitions. [2024-06-27 21:34:15,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 382 transitions, 5260 flow [2024-06-27 21:34:16,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 382 transitions, 5135 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:16,523 INFO L231 Difference]: Finished difference. Result has 205 places, 342 transitions, 4430 flow [2024-06-27 21:34:16,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4430, PETRI_PLACES=205, PETRI_TRANSITIONS=342} [2024-06-27 21:34:16,524 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-27 21:34:16,524 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 342 transitions, 4430 flow [2024-06-27 21:34:16,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:34:16,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:16,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:34:16,524 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:16,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1086243530, now seen corresponding path program 4 times [2024-06-27 21:34:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585338100] [2024-06-27 21:34:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:20,552 INFO 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 21:34:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585338100] [2024-06-27 21:34:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585338100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:20,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:20,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439551914] [2024-06-27 21:34:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:20,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:20,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:34:20,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 342 transitions, 4430 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:34:20,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:20,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:34:20,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:24,182 INFO L124 PetriNetUnfolderBase]: 9229/13730 cut-off events. [2024-06-27 21:34:24,182 INFO L125 PetriNetUnfolderBase]: For 579063/579106 co-relation queries the response was YES. [2024-06-27 21:34:24,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96577 conditions, 13730 events. 9229/13730 cut-off events. For 579063/579106 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 84881 event pairs, 2230 based on Foata normal form. 28/13621 useless extension candidates. Maximal degree in co-relation 96486. Up to 11515 conditions per place. [2024-06-27 21:34:24,320 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 274 selfloop transitions, 77 changer transitions 0/382 dead transitions. [2024-06-27 21:34:24,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 382 transitions, 5376 flow [2024-06-27 21:34:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 21:34:24,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-27 21:34:24,322 INFO L175 Difference]: Start difference. First operand has 205 places, 342 transitions, 4430 flow. Second operand 6 states and 154 transitions. [2024-06-27 21:34:24,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 382 transitions, 5376 flow [2024-06-27 21:34:25,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 382 transitions, 5189 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:25,242 INFO L231 Difference]: Finished difference. Result has 205 places, 344 transitions, 4478 flow [2024-06-27 21:34:25,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4478, PETRI_PLACES=205, PETRI_TRANSITIONS=344} [2024-06-27 21:34:25,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-27 21:34:25,243 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 344 transitions, 4478 flow [2024-06-27 21:34:25,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:34:25,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:25,243 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 21:34:25,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:34:25,243 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:25,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1812517954, now seen corresponding path program 1 times [2024-06-27 21:34:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:25,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491157903] [2024-06-27 21:34:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:29,085 INFO 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 21:34:29,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:29,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491157903] [2024-06-27 21:34:29,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491157903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:29,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:29,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085363555] [2024-06-27 21:34:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:29,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:34:29,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 344 transitions, 4478 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 21:34:29,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:29,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:34:29,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:32,760 INFO L124 PetriNetUnfolderBase]: 9770/14405 cut-off events. [2024-06-27 21:34:32,760 INFO L125 PetriNetUnfolderBase]: For 594557/594557 co-relation queries the response was YES. [2024-06-27 21:34:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100390 conditions, 14405 events. 9770/14405 cut-off events. For 594557/594557 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 88022 event pairs, 2846 based on Foata normal form. 12/14411 useless extension candidates. Maximal degree in co-relation 100301. Up to 13326 conditions per place. [2024-06-27 21:34:32,914 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 352 selfloop transitions, 31 changer transitions 0/390 dead transitions. [2024-06-27 21:34:32,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 390 transitions, 5504 flow [2024-06-27 21:34:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 21:34:32,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-27 21:34:32,915 INFO L175 Difference]: Start difference. First operand has 205 places, 344 transitions, 4478 flow. Second operand 7 states and 174 transitions. [2024-06-27 21:34:32,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 390 transitions, 5504 flow [2024-06-27 21:34:33,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 390 transitions, 5309 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:33,852 INFO L231 Difference]: Finished difference. Result has 208 places, 346 transitions, 4426 flow [2024-06-27 21:34:33,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4283, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4426, PETRI_PLACES=208, PETRI_TRANSITIONS=346} [2024-06-27 21:34:33,852 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2024-06-27 21:34:33,852 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 346 transitions, 4426 flow [2024-06-27 21:34:33,852 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 21:34:33,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:33,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:33,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:34:33,853 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:33,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1647357658, now seen corresponding path program 1 times [2024-06-27 21:34:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:33,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59737831] [2024-06-27 21:34:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:37,600 INFO 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 21:34:37,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:37,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59737831] [2024-06-27 21:34:37,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59737831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:37,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:37,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:37,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649091558] [2024-06-27 21:34:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:37,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:37,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:34:37,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 346 transitions, 4426 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 21:34:37,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:37,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:34:37,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:41,920 INFO L124 PetriNetUnfolderBase]: 10090/14826 cut-off events. [2024-06-27 21:34:41,920 INFO L125 PetriNetUnfolderBase]: For 648120/648120 co-relation queries the response was YES. [2024-06-27 21:34:42,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104318 conditions, 14826 events. 10090/14826 cut-off events. For 648120/648120 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 90710 event pairs, 2796 based on Foata normal form. 16/14835 useless extension candidates. Maximal degree in co-relation 104228. Up to 13214 conditions per place. [2024-06-27 21:34:42,212 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 314 selfloop transitions, 94 changer transitions 0/415 dead transitions. [2024-06-27 21:34:42,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 415 transitions, 5835 flow [2024-06-27 21:34:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 21:34:42,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:34:42,213 INFO L175 Difference]: Start difference. First operand has 208 places, 346 transitions, 4426 flow. Second operand 8 states and 208 transitions. [2024-06-27 21:34:42,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 415 transitions, 5835 flow [2024-06-27 21:34:43,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 415 transitions, 5730 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:43,159 INFO L231 Difference]: Finished difference. Result has 211 places, 350 transitions, 4661 flow [2024-06-27 21:34:43,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4661, PETRI_PLACES=211, PETRI_TRANSITIONS=350} [2024-06-27 21:34:43,159 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 156 predicate places. [2024-06-27 21:34:43,159 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 350 transitions, 4661 flow [2024-06-27 21:34:43,159 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 21:34:43,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:43,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:43,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:34:43,160 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:43,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1650214618, now seen corresponding path program 2 times [2024-06-27 21:34:43,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:43,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724639077] [2024-06-27 21:34:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:43,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:47,427 INFO 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 21:34:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724639077] [2024-06-27 21:34:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724639077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:47,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72376769] [2024-06-27 21:34:47,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:47,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:34:47,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 350 transitions, 4661 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 21:34:47,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:47,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:34:47,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:51,591 INFO L124 PetriNetUnfolderBase]: 10238/15040 cut-off events. [2024-06-27 21:34:51,591 INFO L125 PetriNetUnfolderBase]: For 681344/681344 co-relation queries the response was YES. [2024-06-27 21:34:51,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107209 conditions, 15040 events. 10238/15040 cut-off events. For 681344/681344 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 92088 event pairs, 2860 based on Foata normal form. 20/15052 useless extension candidates. Maximal degree in co-relation 107118. Up to 13720 conditions per place. [2024-06-27 21:34:52,079 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 310 selfloop transitions, 91 changer transitions 0/408 dead transitions. [2024-06-27 21:34:52,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 408 transitions, 5784 flow [2024-06-27 21:34:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 21:34:52,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 21:34:52,082 INFO L175 Difference]: Start difference. First operand has 211 places, 350 transitions, 4661 flow. Second operand 8 states and 200 transitions. [2024-06-27 21:34:52,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 408 transitions, 5784 flow [2024-06-27 21:34:53,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 408 transitions, 5625 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:53,199 INFO L231 Difference]: Finished difference. Result has 215 places, 352 transitions, 4770 flow [2024-06-27 21:34:53,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4770, PETRI_PLACES=215, PETRI_TRANSITIONS=352} [2024-06-27 21:34:53,200 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-27 21:34:53,200 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 352 transitions, 4770 flow [2024-06-27 21:34:53,200 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 21:34:53,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:53,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:53,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:34:53,200 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:53,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1931144922, now seen corresponding path program 3 times [2024-06-27 21:34:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:53,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202960741] [2024-06-27 21:34:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:57,201 INFO 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 21:34:57,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:57,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202960741] [2024-06-27 21:34:57,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202960741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:57,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:57,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424789077] [2024-06-27 21:34:57,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:57,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:57,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:34:57,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 352 transitions, 4770 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 21:34:57,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:57,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:34:57,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:01,513 INFO L124 PetriNetUnfolderBase]: 10834/15946 cut-off events. [2024-06-27 21:35:01,513 INFO L125 PetriNetUnfolderBase]: For 717059/717059 co-relation queries the response was YES. [2024-06-27 21:35:01,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112977 conditions, 15946 events. 10834/15946 cut-off events. For 717059/717059 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 98947 event pairs, 3051 based on Foata normal form. 20/15962 useless extension candidates. Maximal degree in co-relation 112884. Up to 14101 conditions per place. [2024-06-27 21:35:01,681 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 323 selfloop transitions, 77 changer transitions 0/407 dead transitions. [2024-06-27 21:35:01,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 407 transitions, 5902 flow [2024-06-27 21:35:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 21:35:01,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-27 21:35:01,683 INFO L175 Difference]: Start difference. First operand has 215 places, 352 transitions, 4770 flow. Second operand 8 states and 198 transitions. [2024-06-27 21:35:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 407 transitions, 5902 flow [2024-06-27 21:35:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 407 transitions, 5686 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:02,788 INFO L231 Difference]: Finished difference. Result has 217 places, 355 transitions, 4823 flow [2024-06-27 21:35:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4823, PETRI_PLACES=217, PETRI_TRANSITIONS=355} [2024-06-27 21:35:02,789 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2024-06-27 21:35:02,789 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 355 transitions, 4823 flow [2024-06-27 21:35:02,789 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 21:35:02,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:02,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:35:02,790 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:35:02,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1308690632, now seen corresponding path program 1 times [2024-06-27 21:35:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:02,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171250146] [2024-06-27 21:35:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:02,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:06,270 INFO 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 21:35:06,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:06,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171250146] [2024-06-27 21:35:06,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171250146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:06,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:06,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:35:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243519199] [2024-06-27 21:35:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:35:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:06,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:35:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:35:06,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 21:35:06,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 355 transitions, 4823 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 21:35:06,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:06,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 21:35:06,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:09,975 INFO L124 PetriNetUnfolderBase]: 9697/14622 cut-off events. [2024-06-27 21:35:09,975 INFO L125 PetriNetUnfolderBase]: For 740783/740926 co-relation queries the response was YES. [2024-06-27 21:35:10,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105521 conditions, 14622 events. 9697/14622 cut-off events. For 740783/740926 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 95175 event pairs, 2819 based on Foata normal form. 17/14324 useless extension candidates. Maximal degree in co-relation 105427. Up to 12757 conditions per place. [2024-06-27 21:35:10,139 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 245 selfloop transitions, 68 changer transitions 0/392 dead transitions. [2024-06-27 21:35:10,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 392 transitions, 5634 flow [2024-06-27 21:35:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 21:35:10,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-27 21:35:10,141 INFO L175 Difference]: Start difference. First operand has 217 places, 355 transitions, 4823 flow. Second operand 6 states and 153 transitions. [2024-06-27 21:35:10,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 392 transitions, 5634 flow [2024-06-27 21:35:11,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 392 transitions, 5446 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:11,504 INFO L231 Difference]: Finished difference. Result has 217 places, 362 transitions, 4880 flow [2024-06-27 21:35:11,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4880, PETRI_PLACES=217, PETRI_TRANSITIONS=362} [2024-06-27 21:35:11,505 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2024-06-27 21:35:11,505 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 362 transitions, 4880 flow [2024-06-27 21:35:11,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 21:35:11,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:11,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:35:11,505 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:35:11,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash 57663194, now seen corresponding path program 4 times [2024-06-27 21:35:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:11,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371787573] [2024-06-27 21:35:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:15,401 INFO 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 21:35:15,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371787573] [2024-06-27 21:35:15,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371787573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:15,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:15,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61947131] [2024-06-27 21:35:15,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:15,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:15,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:35:15,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 362 transitions, 4880 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 21:35:15,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:15,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:35:15,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand