./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.opt.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/safe009_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:53:29,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:53:29,662 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:53:29,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:53:29,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:53:29,690 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:53:29,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:53:29,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:53:29,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:53:29,694 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:53:29,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:53:29,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:53:29,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:53:29,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:53:29,696 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:53:29,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:53:29,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:53:29,697 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:53:29,697 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:53:29,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:53:29,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:53:29,697 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:53:29,698 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:53:29,698 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:53:29,698 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:53:29,698 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:53:29,698 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:53:29,699 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:53:29,699 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:53:29,700 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:53:29,700 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:53:29,700 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:53:29,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:53:29,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:53:29,701 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:53:29,702 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:53:29,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:53:29,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:53:29,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:53:29,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:53:29,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:53:29,889 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:53:29,889 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:53:29,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.opt.yml/witness.yml [2024-06-27 18:53:30,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:53:30,092 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:53:30,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-27 18:53:31,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:53:31,224 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:53:31,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-27 18:53:31,234 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de9831f26/dc62d170b8ef40ad9f92d46c41b24911/FLAGb7e37caf3 [2024-06-27 18:53:31,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de9831f26/dc62d170b8ef40ad9f92d46c41b24911 [2024-06-27 18:53:31,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:53:31,256 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:53:31,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:53:31,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:53:31,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:53:31,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:53:30" (1/2) ... [2024-06-27 18:53:31,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2120309d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:53:31, skipping insertion in model container [2024-06-27 18:53:31,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:53:30" (1/2) ... [2024-06-27 18:53:31,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f918b9c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:53:31, skipping insertion in model container [2024-06-27 18:53:31,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:53:31" (2/2) ... [2024-06-27 18:53:31,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2120309d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31, skipping insertion in model container [2024-06-27 18:53:31,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:53:31" (2/2) ... [2024-06-27 18:53:31,266 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:53:31,363 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:53:31,364 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-27 18:53:31,365 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-27 18:53:31,365 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-27 18:53:31,365 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:53:31,365 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-27 18:53:31,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:53:31,547 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i[949,962] [2024-06-27 18:53:31,694 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:53:31,708 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:53:31,752 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i[949,962] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:53:31,840 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:53:31,872 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:53:31,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31 WrapperNode [2024-06-27 18:53:31,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:53:31,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:53:31,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:53:31,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:53:31,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:31,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:31,935 INFO L138 Inliner]: procedures = 175, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 169 [2024-06-27 18:53:31,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:53:31,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:53:31,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:53:31,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:53:31,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:31,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:31,974 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:31,987 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 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 18:53:31,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:31,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:32,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:32,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:32,023 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:32,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:32,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:53:32,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:53:32,039 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:53:32,039 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:53:32,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (1/1) ... [2024-06-27 18:53:32,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:53:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:53:32,074 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 18:53:32,093 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 18:53:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:53:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:53:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:53:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:53:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:53:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:53:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:53:32,108 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:53:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:53:32,108 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:53:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:53:32,108 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:53:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:53:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:53:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:53:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:53:32,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:53:32,112 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 18:53:32,257 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:53:32,258 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:53:32,646 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:53:32,646 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:53:32,917 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:53:32,917 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:53:32,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:53:32 BoogieIcfgContainer [2024-06-27 18:53:32,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:53:32,919 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:53:32,919 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:53:32,921 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:53:32,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:53:30" (1/4) ... [2024-06-27 18:53:32,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e9e44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:53:32, skipping insertion in model container [2024-06-27 18:53:32,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:53:31" (2/4) ... [2024-06-27 18:53:32,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e9e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:53:32, skipping insertion in model container [2024-06-27 18:53:32,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:53:31" (3/4) ... [2024-06-27 18:53:32,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e9e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:53:32, skipping insertion in model container [2024-06-27 18:53:32,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:53:32" (4/4) ... [2024-06-27 18:53:32,923 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.opt.i [2024-06-27 18:53:32,937 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:53:32,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:53:32,937 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:53:32,982 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:53:33,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 18:53:33,045 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 18:53:33,045 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:53:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 18:53:33,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 18:53:33,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 18:53:33,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:53:33,106 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;@572a43e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:53:33,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:53:33,114 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:53:33,118 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:53:33,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:53:33,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:33,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:53:33,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:33,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:33,123 INFO L85 PathProgramCache]: Analyzing trace with hash 639050892, now seen corresponding path program 1 times [2024-06-27 18:53:33,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:33,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956132359] [2024-06-27 18:53:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:33,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:35,071 INFO 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 18:53:35,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:35,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956132359] [2024-06-27 18:53:35,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956132359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:35,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:35,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:53:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207876801] [2024-06-27 18:53:35,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:53:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:53:35,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:53:35,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 18:53:35,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:35,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:35,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 18:53:35,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:35,923 INFO L124 PetriNetUnfolderBase]: 3395/5223 cut-off events. [2024-06-27 18:53:35,923 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 18:53:35,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10218 conditions, 5223 events. 3395/5223 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29178 event pairs, 2190 based on Foata normal form. 0/5039 useless extension candidates. Maximal degree in co-relation 10206. Up to 4904 conditions per place. [2024-06-27 18:53:35,949 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 18:53:35,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 229 flow [2024-06-27 18:53:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:53:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:53:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 18:53:35,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-06-27 18:53:35,960 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 86 transitions. [2024-06-27 18:53:35,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 229 flow [2024-06-27 18:53:35,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:53:35,967 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 123 flow [2024-06-27 18:53:35,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 18:53:35,971 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 18:53:35,971 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 123 flow [2024-06-27 18:53:35,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:35,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:35,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:35,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:53:35,972 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:35,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:35,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1623423968, now seen corresponding path program 1 times [2024-06-27 18:53:35,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:35,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402896116] [2024-06-27 18:53:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:35,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402896116] [2024-06-27 18:53:38,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402896116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:38,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:53:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914913856] [2024-06-27 18:53:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:38,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:53:38,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:53:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:53:38,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 18:53:38,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 18:53:38,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:38,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 18:53:38,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:39,124 INFO L124 PetriNetUnfolderBase]: 4118/6303 cut-off events. [2024-06-27 18:53:39,125 INFO L125 PetriNetUnfolderBase]: For 924/929 co-relation queries the response was YES. [2024-06-27 18:53:39,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13683 conditions, 6303 events. 4118/6303 cut-off events. For 924/929 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 35028 event pairs, 1760 based on Foata normal form. 10/6311 useless extension candidates. Maximal degree in co-relation 13671. Up to 5842 conditions per place. [2024-06-27 18:53:39,151 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 61 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 18:53:39,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 341 flow [2024-06-27 18:53:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:53:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:53:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-27 18:53:39,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 18:53:39,153 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 123 flow. Second operand 4 states and 113 transitions. [2024-06-27 18:53:39,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 341 flow [2024-06-27 18:53:39,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:39,155 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 169 flow [2024-06-27 18:53:39,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 18:53:39,156 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2024-06-27 18:53:39,156 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 169 flow [2024-06-27 18:53:39,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 18:53:39,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:39,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:39,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:53:39,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:39,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1758195299, now seen corresponding path program 1 times [2024-06-27 18:53:39,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:39,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897186793] [2024-06-27 18:53:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:39,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:42,884 INFO 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 18:53:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:42,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897186793] [2024-06-27 18:53:42,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897186793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:42,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:42,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:53:42,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382440883] [2024-06-27 18:53:42,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:42,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:53:42,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:53:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:53:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 18:53:42,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 169 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 18:53:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:43,903 INFO L124 PetriNetUnfolderBase]: 4109/6288 cut-off events. [2024-06-27 18:53:43,903 INFO L125 PetriNetUnfolderBase]: For 2635/2645 co-relation queries the response was YES. [2024-06-27 18:53:43,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14949 conditions, 6288 events. 4109/6288 cut-off events. For 2635/2645 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34904 event pairs, 1379 based on Foata normal form. 14/6300 useless extension candidates. Maximal degree in co-relation 14935. Up to 5773 conditions per place. [2024-06-27 18:53:43,938 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 70 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-27 18:53:43,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 431 flow [2024-06-27 18:53:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:53:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:53:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 18:53:43,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-06-27 18:53:43,943 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 169 flow. Second operand 5 states and 135 transitions. [2024-06-27 18:53:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 431 flow [2024-06-27 18:53:43,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 412 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:43,948 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 200 flow [2024-06-27 18:53:43,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 18:53:43,949 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-06-27 18:53:43,949 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 200 flow [2024-06-27 18:53:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:43,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:43,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:43,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:53:43,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:43,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash -522631566, now seen corresponding path program 1 times [2024-06-27 18:53:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572160580] [2024-06-27 18:53:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:45,689 INFO 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 18:53:45,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572160580] [2024-06-27 18:53:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572160580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:45,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:45,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:53:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313656231] [2024-06-27 18:53:45,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:53:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:53:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:53:45,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-27 18:53:45,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:45,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:45,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-27 18:53:45,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:46,707 INFO L124 PetriNetUnfolderBase]: 3369/5135 cut-off events. [2024-06-27 18:53:46,707 INFO L125 PetriNetUnfolderBase]: For 4066/4066 co-relation queries the response was YES. [2024-06-27 18:53:46,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13187 conditions, 5135 events. 3369/5135 cut-off events. For 4066/4066 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28389 event pairs, 1630 based on Foata normal form. 2/5135 useless extension candidates. Maximal degree in co-relation 13171. Up to 4839 conditions per place. [2024-06-27 18:53:46,735 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 64 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 18:53:46,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 446 flow [2024-06-27 18:53:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:53:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:53:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 18:53:46,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508695652173913 [2024-06-27 18:53:46,738 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 200 flow. Second operand 5 states and 117 transitions. [2024-06-27 18:53:46,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 446 flow [2024-06-27 18:53:46,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 414 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 18:53:46,743 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 248 flow [2024-06-27 18:53:46,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-27 18:53:46,745 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-06-27 18:53:46,745 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 248 flow [2024-06-27 18:53:46,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:46,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:46,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:46,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:53:46,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:46,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash 978292701, now seen corresponding path program 1 times [2024-06-27 18:53:46,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281224191] [2024-06-27 18:53:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:48,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:48,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281224191] [2024-06-27 18:53:48,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281224191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:48,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:48,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:53:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167338641] [2024-06-27 18:53:48,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:48,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:53:48,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:53:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:53:48,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:53:48,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:48,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:48,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:53:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:50,424 INFO L124 PetriNetUnfolderBase]: 4189/6376 cut-off events. [2024-06-27 18:53:50,424 INFO L125 PetriNetUnfolderBase]: For 7729/7729 co-relation queries the response was YES. [2024-06-27 18:53:50,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17314 conditions, 6376 events. 4189/6376 cut-off events. For 7729/7729 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 34903 event pairs, 1762 based on Foata normal form. 8/6383 useless extension candidates. Maximal degree in co-relation 17295. Up to 5695 conditions per place. [2024-06-27 18:53:50,455 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 97 selfloop transitions, 16 changer transitions 0/118 dead transitions. [2024-06-27 18:53:50,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 702 flow [2024-06-27 18:53:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:53:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-06-27 18:53:50,460 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 248 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:53:50,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 702 flow [2024-06-27 18:53:50,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 118 transitions, 684 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:50,474 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 374 flow [2024-06-27 18:53:50,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2024-06-27 18:53:50,477 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-06-27 18:53:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 374 flow [2024-06-27 18:53:50,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:50,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:50,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:53:50,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:50,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 806915268, now seen corresponding path program 1 times [2024-06-27 18:53:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:50,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683183591] [2024-06-27 18:53:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:52,731 INFO 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 18:53:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:52,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683183591] [2024-06-27 18:53:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683183591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:52,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:52,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:52,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466559003] [2024-06-27 18:53:52,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:52,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:52,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:53:52,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 374 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:53:52,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:52,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:53:52,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:54,116 INFO L124 PetriNetUnfolderBase]: 4251/6388 cut-off events. [2024-06-27 18:53:54,116 INFO L125 PetriNetUnfolderBase]: For 12059/12090 co-relation queries the response was YES. [2024-06-27 18:53:54,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19877 conditions, 6388 events. 4251/6388 cut-off events. For 12059/12090 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 34490 event pairs, 1415 based on Foata normal form. 23/6409 useless extension candidates. Maximal degree in co-relation 19853. Up to 5839 conditions per place. [2024-06-27 18:53:54,144 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 99 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2024-06-27 18:53:54,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 816 flow [2024-06-27 18:53:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:53:54,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-06-27 18:53:54,146 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 374 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:53:54,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 816 flow [2024-06-27 18:53:54,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 812 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:54,154 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 493 flow [2024-06-27 18:53:54,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=493, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-27 18:53:54,157 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-06-27 18:53:54,157 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 493 flow [2024-06-27 18:53:54,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:53:54,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:54,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:54,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:53:54,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:54,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:54,158 INFO L85 PathProgramCache]: Analyzing trace with hash -322329600, now seen corresponding path program 2 times [2024-06-27 18:53:54,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356230876] [2024-06-27 18:53:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:56,122 INFO 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 18:53:56,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356230876] [2024-06-27 18:53:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356230876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:56,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:56,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828772018] [2024-06-27 18:53:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:56,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:56,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:53:56,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:53:56,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:56,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:53:56,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:57,392 INFO L124 PetriNetUnfolderBase]: 4251/6390 cut-off events. [2024-06-27 18:53:57,392 INFO L125 PetriNetUnfolderBase]: For 16348/16366 co-relation queries the response was YES. [2024-06-27 18:53:57,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21393 conditions, 6390 events. 4251/6390 cut-off events. For 16348/16366 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 34455 event pairs, 1688 based on Foata normal form. 18/6406 useless extension candidates. Maximal degree in co-relation 21365. Up to 5967 conditions per place. [2024-06-27 18:53:57,427 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 96 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-27 18:53:57,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 856 flow [2024-06-27 18:53:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 18:53:57,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036231884057971 [2024-06-27 18:53:57,428 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 493 flow. Second operand 6 states and 139 transitions. [2024-06-27 18:53:57,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 856 flow [2024-06-27 18:53:57,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 817 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:57,446 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 546 flow [2024-06-27 18:53:57,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-27 18:53:57,447 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2024-06-27 18:53:57,447 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 546 flow [2024-06-27 18:53:57,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:53:57,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:57,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:57,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:53:57,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:53:57,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash -341732004, now seen corresponding path program 1 times [2024-06-27 18:53:57,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:57,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708783303] [2024-06-27 18:53:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:59,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:59,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708783303] [2024-06-27 18:53:59,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708783303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:59,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:59,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765903039] [2024-06-27 18:53:59,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:59,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:59,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:59,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:53:59,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 546 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:53:59,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:59,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:53:59,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:01,736 INFO L124 PetriNetUnfolderBase]: 4621/6884 cut-off events. [2024-06-27 18:54:01,737 INFO L125 PetriNetUnfolderBase]: For 19207/19225 co-relation queries the response was YES. [2024-06-27 18:54:01,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23541 conditions, 6884 events. 4621/6884 cut-off events. For 19207/19225 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 36832 event pairs, 1544 based on Foata normal form. 22/6904 useless extension candidates. Maximal degree in co-relation 23511. Up to 5921 conditions per place. [2024-06-27 18:54:01,780 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 110 selfloop transitions, 36 changer transitions 0/151 dead transitions. [2024-06-27 18:54:01,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 151 transitions, 1104 flow [2024-06-27 18:54:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 18:54:01,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-06-27 18:54:01,782 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 546 flow. Second operand 8 states and 188 transitions. [2024-06-27 18:54:01,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 151 transitions, 1104 flow [2024-06-27 18:54:01,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 151 transitions, 1059 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 18:54:01,800 INFO L231 Difference]: Finished difference. Result has 81 places, 94 transitions, 710 flow [2024-06-27 18:54:01,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=710, PETRI_PLACES=81, PETRI_TRANSITIONS=94} [2024-06-27 18:54:01,802 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-06-27 18:54:01,802 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 94 transitions, 710 flow [2024-06-27 18:54:01,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:54:01,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:01,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:01,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:54:01,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:01,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -458494052, now seen corresponding path program 2 times [2024-06-27 18:54:01,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:01,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808542707] [2024-06-27 18:54:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:01,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808542707] [2024-06-27 18:54:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808542707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:04,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:04,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:54:04,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563926139] [2024-06-27 18:54:04,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:04,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:54:04,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:04,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:54:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:54:04,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:04,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 94 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:54:04,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:04,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:04,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:06,083 INFO L124 PetriNetUnfolderBase]: 4815/7186 cut-off events. [2024-06-27 18:54:06,083 INFO L125 PetriNetUnfolderBase]: For 26834/26852 co-relation queries the response was YES. [2024-06-27 18:54:06,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27210 conditions, 7186 events. 4815/7186 cut-off events. For 26834/26852 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38884 event pairs, 1627 based on Foata normal form. 22/7206 useless extension candidates. Maximal degree in co-relation 27177. Up to 5715 conditions per place. [2024-06-27 18:54:06,123 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 116 selfloop transitions, 45 changer transitions 0/166 dead transitions. [2024-06-27 18:54:06,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 166 transitions, 1354 flow [2024-06-27 18:54:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:54:06,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-27 18:54:06,125 INFO L175 Difference]: Start difference. First operand has 81 places, 94 transitions, 710 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:54:06,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 166 transitions, 1354 flow [2024-06-27 18:54:06,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 166 transitions, 1295 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 18:54:06,159 INFO L231 Difference]: Finished difference. Result has 87 places, 108 transitions, 923 flow [2024-06-27 18:54:06,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=923, PETRI_PLACES=87, PETRI_TRANSITIONS=108} [2024-06-27 18:54:06,161 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2024-06-27 18:54:06,161 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 108 transitions, 923 flow [2024-06-27 18:54:06,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:54:06,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:06,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:06,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:54:06,164 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:06,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash -458485124, now seen corresponding path program 1 times [2024-06-27 18:54:06,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:06,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975723318] [2024-06-27 18:54:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:09,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:09,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975723318] [2024-06-27 18:54:09,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975723318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:09,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:09,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685560242] [2024-06-27 18:54:09,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:09,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:09,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:09,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:09,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 923 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:09,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:09,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:09,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:11,109 INFO L124 PetriNetUnfolderBase]: 5035/7602 cut-off events. [2024-06-27 18:54:11,109 INFO L125 PetriNetUnfolderBase]: For 32985/32985 co-relation queries the response was YES. [2024-06-27 18:54:11,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30468 conditions, 7602 events. 5035/7602 cut-off events. For 32985/32985 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 42241 event pairs, 1690 based on Foata normal form. 16/7617 useless extension candidates. Maximal degree in co-relation 30431. Up to 6559 conditions per place. [2024-06-27 18:54:11,154 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 150 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2024-06-27 18:54:11,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 175 transitions, 1529 flow [2024-06-27 18:54:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:54:11,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-27 18:54:11,156 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 923 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:54:11,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 175 transitions, 1529 flow [2024-06-27 18:54:11,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 175 transitions, 1485 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 18:54:11,200 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 955 flow [2024-06-27 18:54:11,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=955, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-06-27 18:54:11,200 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-27 18:54:11,200 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 955 flow [2024-06-27 18:54:11,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:11,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:11,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:54:11,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:11,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1355159873, now seen corresponding path program 1 times [2024-06-27 18:54:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294277353] [2024-06-27 18:54:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:13,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:13,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294277353] [2024-06-27 18:54:13,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294277353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:13,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:13,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:13,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254339745] [2024-06-27 18:54:13,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:13,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:13,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:13,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:13,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 955 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:13,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:13,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:13,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:16,141 INFO L124 PetriNetUnfolderBase]: 6231/9064 cut-off events. [2024-06-27 18:54:16,141 INFO L125 PetriNetUnfolderBase]: For 35411/35463 co-relation queries the response was YES. [2024-06-27 18:54:16,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35261 conditions, 9064 events. 6231/9064 cut-off events. For 35411/35463 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 49015 event pairs, 1241 based on Foata normal form. 50/9112 useless extension candidates. Maximal degree in co-relation 35221. Up to 6637 conditions per place. [2024-06-27 18:54:16,188 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 165 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2024-06-27 18:54:16,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 221 transitions, 1835 flow [2024-06-27 18:54:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:54:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:54:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:54:16,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558695652173913 [2024-06-27 18:54:16,190 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 955 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:54:16,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 221 transitions, 1835 flow [2024-06-27 18:54:16,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 221 transitions, 1791 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:16,226 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 1146 flow [2024-06-27 18:54:16,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1146, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-27 18:54:16,226 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-06-27 18:54:16,226 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 1146 flow [2024-06-27 18:54:16,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:16,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:16,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:54:16,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:16,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1402280945, now seen corresponding path program 2 times [2024-06-27 18:54:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:16,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264007695] [2024-06-27 18:54:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:18,469 INFO 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 18:54:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:18,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264007695] [2024-06-27 18:54:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264007695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:18,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:18,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350697127] [2024-06-27 18:54:18,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:18,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:18,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 1146 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:18,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:18,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:18,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:20,896 INFO L124 PetriNetUnfolderBase]: 6635/9698 cut-off events. [2024-06-27 18:54:20,896 INFO L125 PetriNetUnfolderBase]: For 47982/48003 co-relation queries the response was YES. [2024-06-27 18:54:20,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40862 conditions, 9698 events. 6635/9698 cut-off events. For 47982/48003 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 53391 event pairs, 1813 based on Foata normal form. 32/9728 useless extension candidates. Maximal degree in co-relation 40819. Up to 7809 conditions per place. [2024-06-27 18:54:20,978 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 159 selfloop transitions, 45 changer transitions 0/209 dead transitions. [2024-06-27 18:54:20,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 209 transitions, 1946 flow [2024-06-27 18:54:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 18:54:20,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538647342995169 [2024-06-27 18:54:20,980 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 1146 flow. Second operand 9 states and 223 transitions. [2024-06-27 18:54:20,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 209 transitions, 1946 flow [2024-06-27 18:54:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 209 transitions, 1834 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:21,076 INFO L231 Difference]: Finished difference. Result has 105 places, 132 transitions, 1265 flow [2024-06-27 18:54:21,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1265, PETRI_PLACES=105, PETRI_TRANSITIONS=132} [2024-06-27 18:54:21,077 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 55 predicate places. [2024-06-27 18:54:21,077 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 132 transitions, 1265 flow [2024-06-27 18:54:21,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:21,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:21,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:21,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:54:21,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:21,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2003755655, now seen corresponding path program 3 times [2024-06-27 18:54:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:21,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031788635] [2024-06-27 18:54:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:23,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031788635] [2024-06-27 18:54:23,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031788635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:23,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:23,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226279629] [2024-06-27 18:54:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:23,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:23,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 132 transitions, 1265 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:23,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:23,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:23,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:26,133 INFO L124 PetriNetUnfolderBase]: 6815/9942 cut-off events. [2024-06-27 18:54:26,134 INFO L125 PetriNetUnfolderBase]: For 54203/54224 co-relation queries the response was YES. [2024-06-27 18:54:26,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43151 conditions, 9942 events. 6815/9942 cut-off events. For 54203/54224 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 54990 event pairs, 1717 based on Foata normal form. 32/9972 useless extension candidates. Maximal degree in co-relation 43105. Up to 7917 conditions per place. [2024-06-27 18:54:26,196 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 175 selfloop transitions, 54 changer transitions 0/234 dead transitions. [2024-06-27 18:54:26,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 234 transitions, 2108 flow [2024-06-27 18:54:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:54:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:54:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-06-27 18:54:26,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355731225296443 [2024-06-27 18:54:26,198 INFO L175 Difference]: Start difference. First operand has 105 places, 132 transitions, 1265 flow. Second operand 11 states and 271 transitions. [2024-06-27 18:54:26,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 234 transitions, 2108 flow [2024-06-27 18:54:26,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 234 transitions, 2030 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:26,279 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 1370 flow [2024-06-27 18:54:26,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1370, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-06-27 18:54:26,279 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 61 predicate places. [2024-06-27 18:54:26,280 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 1370 flow [2024-06-27 18:54:26,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:26,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:26,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:26,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:54:26,280 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:26,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1328411847, now seen corresponding path program 4 times [2024-06-27 18:54:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785053101] [2024-06-27 18:54:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:28,785 INFO 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 18:54:28,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785053101] [2024-06-27 18:54:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785053101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:28,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:28,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:28,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666485641] [2024-06-27 18:54:28,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:28,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:28,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 1370 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:28,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:28,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:28,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:31,334 INFO L124 PetriNetUnfolderBase]: 7535/10986 cut-off events. [2024-06-27 18:54:31,335 INFO L125 PetriNetUnfolderBase]: For 62671/62692 co-relation queries the response was YES. [2024-06-27 18:54:31,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48067 conditions, 10986 events. 7535/10986 cut-off events. For 62671/62692 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 61477 event pairs, 1789 based on Foata normal form. 32/11016 useless extension candidates. Maximal degree in co-relation 48019. Up to 7567 conditions per place. [2024-06-27 18:54:31,397 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 168 selfloop transitions, 77 changer transitions 0/250 dead transitions. [2024-06-27 18:54:31,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 250 transitions, 2392 flow [2024-06-27 18:54:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:54:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:54:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:54:31,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673913043478261 [2024-06-27 18:54:31,399 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 1370 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:54:31,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 250 transitions, 2392 flow [2024-06-27 18:54:31,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 250 transitions, 2254 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 18:54:31,493 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1600 flow [2024-06-27 18:54:31,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1600, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-06-27 18:54:31,493 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 18:54:31,493 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1600 flow [2024-06-27 18:54:31,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:31,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:31,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:31,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:54:31,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:31,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1971926422, now seen corresponding path program 1 times [2024-06-27 18:54:31,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:31,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065291221] [2024-06-27 18:54:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:32,598 INFO 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 18:54:32,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:32,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065291221] [2024-06-27 18:54:32,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065291221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:32,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:32,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:54:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205410744] [2024-06-27 18:54:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:54:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:54:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:54:32,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:32,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1600 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:32,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:32,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:34,555 INFO L124 PetriNetUnfolderBase]: 7529/11208 cut-off events. [2024-06-27 18:54:34,555 INFO L125 PetriNetUnfolderBase]: For 76336/76336 co-relation queries the response was YES. [2024-06-27 18:54:34,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51733 conditions, 11208 events. 7529/11208 cut-off events. For 76336/76336 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 65562 event pairs, 2741 based on Foata normal form. 2/11209 useless extension candidates. Maximal degree in co-relation 51682. Up to 10556 conditions per place. [2024-06-27 18:54:34,634 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 162 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2024-06-27 18:54:34,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 177 transitions, 2074 flow [2024-06-27 18:54:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:54:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:54:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-27 18:54:34,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2024-06-27 18:54:34,636 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1600 flow. Second operand 5 states and 107 transitions. [2024-06-27 18:54:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 177 transitions, 2074 flow [2024-06-27 18:54:34,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 1935 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:34,760 INFO L231 Difference]: Finished difference. Result has 115 places, 158 transitions, 1595 flow [2024-06-27 18:54:34,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1595, PETRI_PLACES=115, PETRI_TRANSITIONS=158} [2024-06-27 18:54:34,760 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-06-27 18:54:34,760 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 158 transitions, 1595 flow [2024-06-27 18:54:34,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:34,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:34,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:34,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:54:34,761 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:34,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1296985599, now seen corresponding path program 1 times [2024-06-27 18:54:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:34,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508617658] [2024-06-27 18:54:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:37,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:37,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508617658] [2024-06-27 18:54:37,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508617658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:37,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:37,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590252052] [2024-06-27 18:54:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:37,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:37,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:37,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:37,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 158 transitions, 1595 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:37,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:37,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:37,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:39,898 INFO L124 PetriNetUnfolderBase]: 7579/11034 cut-off events. [2024-06-27 18:54:39,898 INFO L125 PetriNetUnfolderBase]: For 75832/75884 co-relation queries the response was YES. [2024-06-27 18:54:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51007 conditions, 11034 events. 7579/11034 cut-off events. For 75832/75884 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 62058 event pairs, 1793 based on Foata normal form. 38/11070 useless extension candidates. Maximal degree in co-relation 50953. Up to 10205 conditions per place. [2024-06-27 18:54:39,970 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 186 selfloop transitions, 29 changer transitions 0/220 dead transitions. [2024-06-27 18:54:39,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 220 transitions, 2379 flow [2024-06-27 18:54:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:54:39,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-27 18:54:39,971 INFO L175 Difference]: Start difference. First operand has 115 places, 158 transitions, 1595 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:54:39,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 220 transitions, 2379 flow [2024-06-27 18:54:40,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 220 transitions, 2343 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 18:54:40,089 INFO L231 Difference]: Finished difference. Result has 121 places, 163 transitions, 1734 flow [2024-06-27 18:54:40,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1734, PETRI_PLACES=121, PETRI_TRANSITIONS=163} [2024-06-27 18:54:40,090 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-27 18:54:40,090 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 163 transitions, 1734 flow [2024-06-27 18:54:40,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:40,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:40,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:40,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:54:40,090 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:40,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2105146687, now seen corresponding path program 2 times [2024-06-27 18:54:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:40,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966462952] [2024-06-27 18:54:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:40,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:42,940 INFO 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 18:54:42,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:42,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966462952] [2024-06-27 18:54:42,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966462952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:42,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:42,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:42,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045787104] [2024-06-27 18:54:42,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:42,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:42,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:42,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:42,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 163 transitions, 1734 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:42,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:42,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:42,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:45,258 INFO L124 PetriNetUnfolderBase]: 7629/11108 cut-off events. [2024-06-27 18:54:45,258 INFO L125 PetriNetUnfolderBase]: For 85627/85679 co-relation queries the response was YES. [2024-06-27 18:54:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52699 conditions, 11108 events. 7629/11108 cut-off events. For 85627/85679 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 62562 event pairs, 2073 based on Foata normal form. 38/11144 useless extension candidates. Maximal degree in co-relation 52642. Up to 10419 conditions per place. [2024-06-27 18:54:45,358 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 188 selfloop transitions, 26 changer transitions 0/219 dead transitions. [2024-06-27 18:54:45,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 219 transitions, 2388 flow [2024-06-27 18:54:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:54:45,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 18:54:45,359 INFO L175 Difference]: Start difference. First operand has 121 places, 163 transitions, 1734 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:54:45,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 219 transitions, 2388 flow [2024-06-27 18:54:45,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 219 transitions, 2310 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 18:54:45,563 INFO L231 Difference]: Finished difference. Result has 125 places, 165 transitions, 1765 flow [2024-06-27 18:54:45,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1765, PETRI_PLACES=125, PETRI_TRANSITIONS=165} [2024-06-27 18:54:45,563 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-06-27 18:54:45,563 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 165 transitions, 1765 flow [2024-06-27 18:54:45,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:45,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:45,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:45,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:54:45,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:45,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash -521039201, now seen corresponding path program 3 times [2024-06-27 18:54:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:45,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776076347] [2024-06-27 18:54:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:45,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:48,546 INFO 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 18:54:48,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776076347] [2024-06-27 18:54:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776076347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:48,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:48,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671916580] [2024-06-27 18:54:48,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:48,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:48,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:48,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:48,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 165 transitions, 1765 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:48,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:48,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:48,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:50,897 INFO L124 PetriNetUnfolderBase]: 7629/11110 cut-off events. [2024-06-27 18:54:50,897 INFO L125 PetriNetUnfolderBase]: For 86477/86498 co-relation queries the response was YES. [2024-06-27 18:54:50,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52797 conditions, 11110 events. 7629/11110 cut-off events. For 86477/86498 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 62946 event pairs, 2492 based on Foata normal form. 20/11128 useless extension candidates. Maximal degree in co-relation 52738. Up to 10547 conditions per place. [2024-06-27 18:54:50,986 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 188 selfloop transitions, 22 changer transitions 0/215 dead transitions. [2024-06-27 18:54:50,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 215 transitions, 2371 flow [2024-06-27 18:54:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:54:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:54:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:54:50,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-06-27 18:54:50,988 INFO L175 Difference]: Start difference. First operand has 125 places, 165 transitions, 1765 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:54:50,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 215 transitions, 2371 flow [2024-06-27 18:54:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 2286 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:51,169 INFO L231 Difference]: Finished difference. Result has 127 places, 168 transitions, 1800 flow [2024-06-27 18:54:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1800, PETRI_PLACES=127, PETRI_TRANSITIONS=168} [2024-06-27 18:54:51,170 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2024-06-27 18:54:51,170 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 168 transitions, 1800 flow [2024-06-27 18:54:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:51,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:51,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:54:51,171 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:51,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1986874309, now seen corresponding path program 1 times [2024-06-27 18:54:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744083440] [2024-06-27 18:54:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:51,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:53,977 INFO 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 18:54:53,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:53,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744083440] [2024-06-27 18:54:53,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744083440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:53,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:53,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:53,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841934790] [2024-06-27 18:54:53,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:53,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:53,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:53,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:53,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:53,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:54:53,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 168 transitions, 1800 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:53,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:53,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:54:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:56,977 INFO L124 PetriNetUnfolderBase]: 7907/11520 cut-off events. [2024-06-27 18:54:56,977 INFO L125 PetriNetUnfolderBase]: For 95436/95457 co-relation queries the response was YES. [2024-06-27 18:54:57,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54714 conditions, 11520 events. 7907/11520 cut-off events. For 95436/95457 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 65004 event pairs, 1922 based on Foata normal form. 32/11550 useless extension candidates. Maximal degree in co-relation 54654. Up to 9838 conditions per place. [2024-06-27 18:54:57,048 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 195 selfloop transitions, 44 changer transitions 0/244 dead transitions. [2024-06-27 18:54:57,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 244 transitions, 2666 flow [2024-06-27 18:54:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 18:54:57,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241545893719807 [2024-06-27 18:54:57,050 INFO L175 Difference]: Start difference. First operand has 127 places, 168 transitions, 1800 flow. Second operand 9 states and 217 transitions. [2024-06-27 18:54:57,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 244 transitions, 2666 flow [2024-06-27 18:54:57,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 244 transitions, 2588 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:57,181 INFO L231 Difference]: Finished difference. Result has 131 places, 170 transitions, 1862 flow [2024-06-27 18:54:57,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1862, PETRI_PLACES=131, PETRI_TRANSITIONS=170} [2024-06-27 18:54:57,181 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-06-27 18:54:57,182 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 170 transitions, 1862 flow [2024-06-27 18:54:57,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:54:57,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:57,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:54:57,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:54:57,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1769145195, now seen corresponding path program 2 times [2024-06-27 18:54:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932819492] [2024-06-27 18:54:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:00,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:00,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932819492] [2024-06-27 18:55:00,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932819492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:00,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:00,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481019479] [2024-06-27 18:55:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:00,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:00,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:00,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 170 transitions, 1862 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:55:00,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:00,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:00,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:03,169 INFO L124 PetriNetUnfolderBase]: 8185/11958 cut-off events. [2024-06-27 18:55:03,169 INFO L125 PetriNetUnfolderBase]: For 107449/107470 co-relation queries the response was YES. [2024-06-27 18:55:03,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58048 conditions, 11958 events. 8185/11958 cut-off events. For 107449/107470 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68026 event pairs, 1897 based on Foata normal form. 32/11988 useless extension candidates. Maximal degree in co-relation 57987. Up to 10092 conditions per place. [2024-06-27 18:55:03,247 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 193 selfloop transitions, 49 changer transitions 0/247 dead transitions. [2024-06-27 18:55:03,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 247 transitions, 2782 flow [2024-06-27 18:55:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:55:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:55:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:55:03,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-27 18:55:03,249 INFO L175 Difference]: Start difference. First operand has 131 places, 170 transitions, 1862 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:55:03,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 247 transitions, 2782 flow [2024-06-27 18:55:03,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 247 transitions, 2686 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:55:03,431 INFO L231 Difference]: Finished difference. Result has 132 places, 172 transitions, 1916 flow [2024-06-27 18:55:03,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=132, PETRI_TRANSITIONS=172} [2024-06-27 18:55:03,432 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-27 18:55:03,432 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 172 transitions, 1916 flow [2024-06-27 18:55:03,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:55:03,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:03,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:03,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:55:03,433 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:03,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1777485435, now seen corresponding path program 3 times [2024-06-27 18:55:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768512826] [2024-06-27 18:55:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:06,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768512826] [2024-06-27 18:55:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768512826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076355126] [2024-06-27 18:55:06,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:06,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:06,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 172 transitions, 1916 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:55:06,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:06,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:06,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:09,328 INFO L124 PetriNetUnfolderBase]: 8645/12630 cut-off events. [2024-06-27 18:55:09,329 INFO L125 PetriNetUnfolderBase]: For 119732/119753 co-relation queries the response was YES. [2024-06-27 18:55:09,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61781 conditions, 12630 events. 8645/12630 cut-off events. For 119732/119753 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 72711 event pairs, 1859 based on Foata normal form. 32/12660 useless extension candidates. Maximal degree in co-relation 61719. Up to 9474 conditions per place. [2024-06-27 18:55:09,412 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 195 selfloop transitions, 55 changer transitions 0/255 dead transitions. [2024-06-27 18:55:09,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 255 transitions, 2938 flow [2024-06-27 18:55:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:55:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:55:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:55:09,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-06-27 18:55:09,413 INFO L175 Difference]: Start difference. First operand has 132 places, 172 transitions, 1916 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:55:09,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 255 transitions, 2938 flow [2024-06-27 18:55:09,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 255 transitions, 2822 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:55:09,635 INFO L231 Difference]: Finished difference. Result has 134 places, 175 transitions, 1977 flow [2024-06-27 18:55:09,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1977, PETRI_PLACES=134, PETRI_TRANSITIONS=175} [2024-06-27 18:55:09,635 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 84 predicate places. [2024-06-27 18:55:09,635 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 175 transitions, 1977 flow [2024-06-27 18:55:09,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 18:55:09,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:09,636 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 18:55:09,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:55:09,636 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:09,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash -836909744, now seen corresponding path program 1 times [2024-06-27 18:55:09,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:09,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844770417] [2024-06-27 18:55:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:12,851 INFO 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 18:55:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:12,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844770417] [2024-06-27 18:55:12,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844770417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:12,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:12,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:55:12,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313372544] [2024-06-27 18:55:12,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:55:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:12,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:55:12,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:55:12,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:12,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 175 transitions, 1977 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:12,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:12,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:12,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:17,197 INFO L124 PetriNetUnfolderBase]: 12233/17888 cut-off events. [2024-06-27 18:55:17,198 INFO L125 PetriNetUnfolderBase]: For 208590/208640 co-relation queries the response was YES. [2024-06-27 18:55:17,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86978 conditions, 17888 events. 12233/17888 cut-off events. For 208590/208640 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 109770 event pairs, 2071 based on Foata normal form. 98/17984 useless extension candidates. Maximal degree in co-relation 86915. Up to 8348 conditions per place. [2024-06-27 18:55:17,556 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 236 selfloop transitions, 64 changer transitions 0/305 dead transitions. [2024-06-27 18:55:17,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 305 transitions, 3431 flow [2024-06-27 18:55:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-27 18:55:17,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021739130434782 [2024-06-27 18:55:17,558 INFO L175 Difference]: Start difference. First operand has 134 places, 175 transitions, 1977 flow. Second operand 10 states and 277 transitions. [2024-06-27 18:55:17,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 305 transitions, 3431 flow [2024-06-27 18:55:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 305 transitions, 3340 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 18:55:17,935 INFO L231 Difference]: Finished difference. Result has 142 places, 178 transitions, 2124 flow [2024-06-27 18:55:17,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2124, PETRI_PLACES=142, PETRI_TRANSITIONS=178} [2024-06-27 18:55:17,936 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-06-27 18:55:17,936 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 178 transitions, 2124 flow [2024-06-27 18:55:17,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:17,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:17,936 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 18:55:17,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:55:17,936 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:17,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:17,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1611384360, now seen corresponding path program 2 times [2024-06-27 18:55:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894323328] [2024-06-27 18:55:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894323328] [2024-06-27 18:55:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894323328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:55:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393205026] [2024-06-27 18:55:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:55:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:55:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:55:21,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:21,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 178 transitions, 2124 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:21,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:21,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:21,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:26,471 INFO L124 PetriNetUnfolderBase]: 13477/20056 cut-off events. [2024-06-27 18:55:26,471 INFO L125 PetriNetUnfolderBase]: For 256439/256489 co-relation queries the response was YES. [2024-06-27 18:55:26,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97345 conditions, 20056 events. 13477/20056 cut-off events. For 256439/256489 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 128327 event pairs, 3443 based on Foata normal form. 114/20168 useless extension candidates. Maximal degree in co-relation 97278. Up to 14882 conditions per place. [2024-06-27 18:55:26,632 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 228 selfloop transitions, 64 changer transitions 0/297 dead transitions. [2024-06-27 18:55:26,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 297 transitions, 3352 flow [2024-06-27 18:55:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:55:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:55:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-06-27 18:55:26,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-27 18:55:26,633 INFO L175 Difference]: Start difference. First operand has 142 places, 178 transitions, 2124 flow. Second operand 11 states and 286 transitions. [2024-06-27 18:55:26,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 297 transitions, 3352 flow [2024-06-27 18:55:27,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 297 transitions, 3226 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:55:27,153 INFO L231 Difference]: Finished difference. Result has 147 places, 179 transitions, 2172 flow [2024-06-27 18:55:27,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2172, PETRI_PLACES=147, PETRI_TRANSITIONS=179} [2024-06-27 18:55:27,154 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-06-27 18:55:27,154 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 179 transitions, 2172 flow [2024-06-27 18:55:27,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:27,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:27,154 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 18:55:27,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:55:27,155 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:27,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash -835035794, now seen corresponding path program 3 times [2024-06-27 18:55:27,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:27,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417010413] [2024-06-27 18:55:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:27,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:30,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:30,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417010413] [2024-06-27 18:55:30,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417010413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:30,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:30,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:55:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847050292] [2024-06-27 18:55:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:30,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:55:30,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:55:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:55:30,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:30,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 179 transitions, 2172 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:30,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:30,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:30,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:35,409 INFO L124 PetriNetUnfolderBase]: 15721/23316 cut-off events. [2024-06-27 18:55:35,409 INFO L125 PetriNetUnfolderBase]: For 293966/294016 co-relation queries the response was YES. [2024-06-27 18:55:35,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111878 conditions, 23316 events. 15721/23316 cut-off events. For 293966/294016 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 152377 event pairs, 3886 based on Foata normal form. 98/23412 useless extension candidates. Maximal degree in co-relation 111810. Up to 14556 conditions per place. [2024-06-27 18:55:35,606 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 241 selfloop transitions, 64 changer transitions 0/310 dead transitions. [2024-06-27 18:55:35,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 310 transitions, 3546 flow [2024-06-27 18:55:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:55:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:55:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 296 transitions. [2024-06-27 18:55:35,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849802371541502 [2024-06-27 18:55:35,608 INFO L175 Difference]: Start difference. First operand has 147 places, 179 transitions, 2172 flow. Second operand 11 states and 296 transitions. [2024-06-27 18:55:35,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 310 transitions, 3546 flow [2024-06-27 18:55:36,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 310 transitions, 3400 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 18:55:36,296 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 2231 flow [2024-06-27 18:55:36,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2231, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-27 18:55:36,297 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 18:55:36,297 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 2231 flow [2024-06-27 18:55:36,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:36,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:36,297 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 18:55:36,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:55:36,297 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:36,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1027659736, now seen corresponding path program 4 times [2024-06-27 18:55:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:36,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198127238] [2024-06-27 18:55:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:39,655 INFO 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 18:55:39,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:39,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198127238] [2024-06-27 18:55:39,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198127238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:39,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:39,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:55:39,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013773767] [2024-06-27 18:55:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:55:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:55:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:55:39,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 2231 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:39,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:39,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:39,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:45,559 INFO L124 PetriNetUnfolderBase]: 16965/25686 cut-off events. [2024-06-27 18:55:45,560 INFO L125 PetriNetUnfolderBase]: For 332537/332558 co-relation queries the response was YES. [2024-06-27 18:55:45,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120536 conditions, 25686 events. 16965/25686 cut-off events. For 332537/332558 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 174972 event pairs, 6290 based on Foata normal form. 96/25780 useless extension candidates. Maximal degree in co-relation 120466. Up to 21210 conditions per place. [2024-06-27 18:55:45,766 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 217 selfloop transitions, 55 changer transitions 0/277 dead transitions. [2024-06-27 18:55:45,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 277 transitions, 3269 flow [2024-06-27 18:55:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 18:55:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-06-27 18:55:45,768 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 2231 flow. Second operand 10 states and 252 transitions. [2024-06-27 18:55:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 277 transitions, 3269 flow [2024-06-27 18:55:46,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 277 transitions, 3124 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 18:55:46,624 INFO L231 Difference]: Finished difference. Result has 152 places, 183 transitions, 2273 flow [2024-06-27 18:55:46,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2273, PETRI_PLACES=152, PETRI_TRANSITIONS=183} [2024-06-27 18:55:46,624 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-06-27 18:55:46,624 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 183 transitions, 2273 flow [2024-06-27 18:55:46,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:46,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:46,625 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 18:55:46,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:55:46,625 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:46,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1463566998, now seen corresponding path program 1 times [2024-06-27 18:55:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:46,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937060370] [2024-06-27 18:55:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:50,140 INFO 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 18:55:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937060370] [2024-06-27 18:55:50,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937060370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:50,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:50,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:55:50,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550304936] [2024-06-27 18:55:50,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:50,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:55:50,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:55:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:55:50,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:55:50,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 183 transitions, 2273 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:50,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:50,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:55:50,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:56,392 INFO L124 PetriNetUnfolderBase]: 18109/27446 cut-off events. [2024-06-27 18:55:56,392 INFO L125 PetriNetUnfolderBase]: For 366864/366885 co-relation queries the response was YES. [2024-06-27 18:55:56,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127913 conditions, 27446 events. 18109/27446 cut-off events. For 366864/366885 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 189554 event pairs, 6657 based on Foata normal form. 96/27540 useless extension candidates. Maximal degree in co-relation 127842. Up to 22954 conditions per place. [2024-06-27 18:55:56,682 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 236 selfloop transitions, 60 changer transitions 0/301 dead transitions. [2024-06-27 18:55:56,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 301 transitions, 3445 flow [2024-06-27 18:55:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:55:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:55:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 301 transitions. [2024-06-27 18:55:56,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452898550724637 [2024-06-27 18:55:56,685 INFO L175 Difference]: Start difference. First operand has 152 places, 183 transitions, 2273 flow. Second operand 12 states and 301 transitions. [2024-06-27 18:55:56,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 301 transitions, 3445 flow [2024-06-27 18:55:57,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 301 transitions, 3286 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 18:55:57,661 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 2315 flow [2024-06-27 18:55:57,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2315, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-27 18:55:57,661 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-27 18:55:57,662 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 2315 flow [2024-06-27 18:55:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:55:57,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:57,662 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 18:55:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:55:57,662 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:57,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:57,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1463559558, now seen corresponding path program 2 times [2024-06-27 18:55:57,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:57,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117776215] [2024-06-27 18:55:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:57,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:01,051 INFO 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 18:56:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117776215] [2024-06-27 18:56:01,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117776215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:01,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:01,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:56:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097964164] [2024-06-27 18:56:01,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:01,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:56:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:56:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:56:01,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:56:01,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 2315 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:56:01,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:01,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:56:01,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:07,440 INFO L124 PetriNetUnfolderBase]: 19193/29186 cut-off events. [2024-06-27 18:56:07,440 INFO L125 PetriNetUnfolderBase]: For 388615/388636 co-relation queries the response was YES. [2024-06-27 18:56:07,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134284 conditions, 29186 events. 19193/29186 cut-off events. For 388615/388636 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 204471 event pairs, 5836 based on Foata normal form. 80/29264 useless extension candidates. Maximal degree in co-relation 134212. Up to 20626 conditions per place. [2024-06-27 18:56:07,670 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 240 selfloop transitions, 69 changer transitions 0/314 dead transitions. [2024-06-27 18:56:07,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 314 transitions, 3648 flow [2024-06-27 18:56:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:56:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:56:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 306 transitions. [2024-06-27 18:56:07,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-27 18:56:07,671 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 2315 flow. Second operand 12 states and 306 transitions. [2024-06-27 18:56:07,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 314 transitions, 3648 flow [2024-06-27 18:56:08,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 314 transitions, 3475 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 18:56:08,544 INFO L231 Difference]: Finished difference. Result has 159 places, 192 transitions, 2473 flow [2024-06-27 18:56:08,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2473, PETRI_PLACES=159, PETRI_TRANSITIONS=192} [2024-06-27 18:56:08,545 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-06-27 18:56:08,545 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 192 transitions, 2473 flow [2024-06-27 18:56:08,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:56:08,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:08,545 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 18:56:08,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:56:08,545 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:08,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1469285010, now seen corresponding path program 5 times [2024-06-27 18:56:08,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:08,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714186234] [2024-06-27 18:56:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:08,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:12,252 INFO 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 18:56:12,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:12,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714186234] [2024-06-27 18:56:12,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714186234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:12,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:12,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:56:12,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382828103] [2024-06-27 18:56:12,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:56:12,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:56:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:56:12,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-06-27 18:56:12,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 192 transitions, 2473 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:56:12,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:12,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-06-27 18:56:12,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand