./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe008_power.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/safe008_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe008_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:52:52,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:52:52,739 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:52:52,742 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:52:52,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:52:52,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:52:52,762 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:52:52,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:52:52,763 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:52:52,766 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:52:52,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:52:52,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:52:52,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:52:52,769 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:52:52,769 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:52:52,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:52:52,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:52:52,770 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:52:52,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:52:52,770 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:52:52,770 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:52:52,771 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:52:52,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:52:52,771 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:52:52,771 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:52:52,771 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:52:52,772 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:52:52,772 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:52:52,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:52:52,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:52:52,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:52:52,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:52:52,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:52:52,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:52:52,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:52:52,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:52:52,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:52:52,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:52:52,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:52:52,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:52:52,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:52:52,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:52:52,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:52:52,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:52:52,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:52:53,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:52:53,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:52:53,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:52:53,004 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:52:53,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-27 18:52:54,140 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:52:54,334 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:52:54,335 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.opt.i [2024-06-27 18:52:54,353 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b4eb639/97a00d2ea0654ccfbddf49b4af5ea430/FLAG3f54ccc73 [2024-06-27 18:52:54,364 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b4eb639/97a00d2ea0654ccfbddf49b4af5ea430 [2024-06-27 18:52:54,367 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:52:54,367 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:52:54,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe008_power.opt.yml/witness.yml [2024-06-27 18:52:54,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:52:54,598 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:52:54,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:52:54,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:52:54,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:52:54,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:52:54" (1/2) ... [2024-06-27 18:52:54,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0f1421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:54, skipping insertion in model container [2024-06-27 18:52:54,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:52:54" (1/2) ... [2024-06-27 18:52:54,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e8f54d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:52:54, skipping insertion in model container [2024-06-27 18:52:54,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:52:54" (2/2) ... [2024-06-27 18:52:54,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0f1421 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:54, skipping insertion in model container [2024-06-27 18:52:54,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:52:54" (2/2) ... [2024-06-27 18:52:54,609 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:52:54,707 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:52:54,708 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-27 18:52:54,708 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$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$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-27 18:52:54,708 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) [2024-06-27 18:52:54,709 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:52:54,709 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 18:52:54,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:52:54,905 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/safe008_power.opt.i[951,964] [2024-06-27 18:52:55,082 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:52:55,090 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:52:55,126 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/safe008_power.opt.i[951,964] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:52:55,207 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:52:55,239 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:52:55,240 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55 WrapperNode [2024-06-27 18:52:55,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:52:55,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:52:55,242 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:52:55,242 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:52:55,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,291 INFO L138 Inliner]: procedures = 175, calls = 73, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 214 [2024-06-27 18:52:55,292 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:52:55,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:52:55,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:52:55,293 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:52:55,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,305 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,320 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-27 18:52:55,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,330 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,339 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:52:55,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:52:55,340 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:52:55,340 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:52:55,341 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (1/1) ... [2024-06-27 18:52:55,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:52:55,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:52:55,364 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 18:52:55,374 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 18:52:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:52:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:52:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:52:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:52:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:52:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:52:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:52:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:52:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:52:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:52:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:52:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:52:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:52:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:52:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:52:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:52:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:52:55,401 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 18:52:55,526 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:52:55,528 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:52:55,962 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:52:55,962 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:52:56,298 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:52:56,299 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:52:56,299 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:52:56 BoogieIcfgContainer [2024-06-27 18:52:56,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:52:56,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:52:56,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:52:56,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:52:56,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:52:54" (1/4) ... [2024-06-27 18:52:56,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a153333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:52:56, skipping insertion in model container [2024-06-27 18:52:56,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:52:54" (2/4) ... [2024-06-27 18:52:56,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a153333 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:52:56, skipping insertion in model container [2024-06-27 18:52:56,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:52:55" (3/4) ... [2024-06-27 18:52:56,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a153333 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:52:56, skipping insertion in model container [2024-06-27 18:52:56,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:52:56" (4/4) ... [2024-06-27 18:52:56,308 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.opt.i [2024-06-27 18:52:56,323 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:52:56,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:52:56,323 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:52:56,380 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:52:56,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:52:56,443 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-27 18:52:56,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:52:56,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-27 18:52:56,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:52:56,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 99 flow [2024-06-27 18:52:56,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:52:56,513 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;@5b2b0077, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:52:56,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:52:56,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:52:56,530 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:52:56,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:52:56,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:56,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:52:56,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:52:56,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 762396259, now seen corresponding path program 1 times [2024-06-27 18:52:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:56,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598789264] [2024-06-27 18:52:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:57,914 INFO 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 18:52:57,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598789264] [2024-06-27 18:52:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598789264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:57,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:52:57,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650996273] [2024-06-27 18:52:57,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:57,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:52:57,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:52:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:52:57,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:52:57,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 99 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 18:52:57,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:57,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:52:57,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:59,301 INFO L124 PetriNetUnfolderBase]: 5400/8378 cut-off events. [2024-06-27 18:52:59,301 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-27 18:52:59,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16226 conditions, 8378 events. 5400/8378 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 50102 event pairs, 3802 based on Foata normal form. 210/7782 useless extension candidates. Maximal degree in co-relation 16214. Up to 7729 conditions per place. [2024-06-27 18:52:59,340 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 48 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 18:52:59,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 243 flow [2024-06-27 18:52:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:52:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:52:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-27 18:52:59,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:52:59,351 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 99 flow. Second operand 3 states and 90 transitions. [2024-06-27 18:52:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 243 flow [2024-06-27 18:52:59,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:52:59,355 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 131 flow [2024-06-27 18:52:59,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-27 18:52:59,359 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-06-27 18:52:59,359 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 131 flow [2024-06-27 18:52:59,359 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 18:52:59,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:59,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-27 18:52:59,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:52:59,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:52:59,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2135476376, now seen corresponding path program 1 times [2024-06-27 18:52:59,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:59,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901845791] [2024-06-27 18:52:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:52:59,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:59,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901845791] [2024-06-27 18:52:59,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901845791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:59,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:59,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:52:59,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780949115] [2024-06-27 18:52:59,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:59,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:52:59,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:59,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:52:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:52:59,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-06-27 18:52:59,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 18:52:59,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:59,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-06-27 18:52:59,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:59,970 INFO L124 PetriNetUnfolderBase]: 1742/2922 cut-off events. [2024-06-27 18:52:59,971 INFO L125 PetriNetUnfolderBase]: For 356/395 co-relation queries the response was YES. [2024-06-27 18:52:59,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 2922 events. 1742/2922 cut-off events. For 356/395 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19524 event pairs, 470 based on Foata normal form. 0/2744 useless extension candidates. Maximal degree in co-relation 6042. Up to 1783 conditions per place. [2024-06-27 18:52:59,983 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 52 selfloop transitions, 2 changer transitions 1/71 dead transitions. [2024-06-27 18:52:59,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 71 transitions, 301 flow [2024-06-27 18:52:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:52:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:52:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-27 18:52:59,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-06-27 18:52:59,985 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 131 flow. Second operand 3 states and 105 transitions. [2024-06-27 18:52:59,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 71 transitions, 301 flow [2024-06-27 18:52:59,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 71 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:52:59,987 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 128 flow [2024-06-27 18:52:59,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-27 18:52:59,988 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-06-27 18:52:59,988 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 128 flow [2024-06-27 18:52:59,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 18:52:59,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:59,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:52:59,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:52:59,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:52:59,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1775258876, now seen corresponding path program 1 times [2024-06-27 18:52:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:59,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572034980] [2024-06-27 18:52:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:01,088 INFO 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 18:53:01,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:01,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572034980] [2024-06-27 18:53:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572034980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:01,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:01,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:53:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56543952] [2024-06-27 18:53:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:53:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:53:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:53:01,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:53:01,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:01,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:01,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:53:01,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:02,293 INFO L124 PetriNetUnfolderBase]: 4614/7178 cut-off events. [2024-06-27 18:53:02,293 INFO L125 PetriNetUnfolderBase]: For 1360/1370 co-relation queries the response was YES. [2024-06-27 18:53:02,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15677 conditions, 7178 events. 4614/7178 cut-off events. For 1360/1370 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41783 event pairs, 2797 based on Foata normal form. 8/7002 useless extension candidates. Maximal degree in co-relation 15664. Up to 6511 conditions per place. [2024-06-27 18:53:02,317 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 63 selfloop transitions, 14 changer transitions 1/86 dead transitions. [2024-06-27 18:53:02,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 388 flow [2024-06-27 18:53:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:53:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:53:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 18:53:02,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 18:53:02,320 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 128 flow. Second operand 4 states and 122 transitions. [2024-06-27 18:53:02,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 388 flow [2024-06-27 18:53:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:02,323 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 217 flow [2024-06-27 18:53:02,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-27 18:53:02,324 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-27 18:53:02,324 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 217 flow [2024-06-27 18:53:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:02,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:02,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:02,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:53:02,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:02,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:02,326 INFO L85 PathProgramCache]: Analyzing trace with hash 760929360, now seen corresponding path program 1 times [2024-06-27 18:53:02,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:02,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378306789] [2024-06-27 18:53:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:03,432 INFO 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 18:53:03,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378306789] [2024-06-27 18:53:03,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378306789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:03,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:03,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:53:03,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071695272] [2024-06-27 18:53:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:03,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:53:03,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:53:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:53:03,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:53:03,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:03,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:03,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:53:03,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:04,390 INFO L124 PetriNetUnfolderBase]: 4207/6603 cut-off events. [2024-06-27 18:53:04,390 INFO L125 PetriNetUnfolderBase]: For 3231/3252 co-relation queries the response was YES. [2024-06-27 18:53:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16260 conditions, 6603 events. 4207/6603 cut-off events. For 3231/3252 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 38461 event pairs, 2255 based on Foata normal form. 11/6430 useless extension candidates. Maximal degree in co-relation 16245. Up to 5941 conditions per place. [2024-06-27 18:53:04,416 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 87 selfloop transitions, 18 changer transitions 0/113 dead transitions. [2024-06-27 18:53:04,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 113 transitions, 612 flow [2024-06-27 18:53:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:53:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:53:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 18:53:04,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 18:53:04,418 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 217 flow. Second operand 5 states and 147 transitions. [2024-06-27 18:53:04,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 113 transitions, 612 flow [2024-06-27 18:53:04,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 113 transitions, 602 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 18:53:04,422 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 392 flow [2024-06-27 18:53:04,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2024-06-27 18:53:04,423 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-06-27 18:53:04,423 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 392 flow [2024-06-27 18:53:04,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:04,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:04,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:04,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:53:04,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2113974849, now seen corresponding path program 1 times [2024-06-27 18:53:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508895685] [2024-06-27 18:53:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:05,938 INFO 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 18:53:05,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508895685] [2024-06-27 18:53:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508895685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:05,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:05,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:53:05,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200261562] [2024-06-27 18:53:05,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:05,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:53:05,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:53:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:53:05,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:53:05,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 18:53:05,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:05,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:53:05,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:07,409 INFO L124 PetriNetUnfolderBase]: 4265/6680 cut-off events. [2024-06-27 18:53:07,409 INFO L125 PetriNetUnfolderBase]: For 6871/6898 co-relation queries the response was YES. [2024-06-27 18:53:07,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19437 conditions, 6680 events. 4265/6680 cut-off events. For 6871/6898 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 38815 event pairs, 1922 based on Foata normal form. 14/6510 useless extension candidates. Maximal degree in co-relation 19417. Up to 5881 conditions per place. [2024-06-27 18:53:07,435 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 96 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-27 18:53:07,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 141 transitions, 900 flow [2024-06-27 18:53:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 18:53:07,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-06-27 18:53:07,437 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 392 flow. Second operand 6 states and 182 transitions. [2024-06-27 18:53:07,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 141 transitions, 900 flow [2024-06-27 18:53:07,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 141 transitions, 872 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:07,442 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 541 flow [2024-06-27 18:53:07,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=541, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2024-06-27 18:53:07,442 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-27 18:53:07,443 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 541 flow [2024-06-27 18:53:07,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 18:53:07,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:07,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:07,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:53:07,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:07,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1108712079, now seen corresponding path program 1 times [2024-06-27 18:53:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:07,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064822737] [2024-06-27 18:53:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:09,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:09,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064822737] [2024-06-27 18:53:09,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064822737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:09,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:09,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:53:09,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819174449] [2024-06-27 18:53:09,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:09,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:53:09,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:53:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:53:09,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 18:53:09,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 541 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:09,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:09,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 18:53:09,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:10,451 INFO L124 PetriNetUnfolderBase]: 4471/6975 cut-off events. [2024-06-27 18:53:10,451 INFO L125 PetriNetUnfolderBase]: For 12033/12060 co-relation queries the response was YES. [2024-06-27 18:53:10,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 6975 events. 4471/6975 cut-off events. For 12033/12060 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40637 event pairs, 1543 based on Foata normal form. 27/6818 useless extension candidates. Maximal degree in co-relation 22698. Up to 6001 conditions per place. [2024-06-27 18:53:10,489 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 125 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2024-06-27 18:53:10,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 159 transitions, 1112 flow [2024-06-27 18:53:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 18:53:10,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-27 18:53:10,491 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 541 flow. Second operand 7 states and 205 transitions. [2024-06-27 18:53:10,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 159 transitions, 1112 flow [2024-06-27 18:53:10,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 1034 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:10,500 INFO L231 Difference]: Finished difference. Result has 74 places, 90 transitions, 614 flow [2024-06-27 18:53:10,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=74, PETRI_TRANSITIONS=90} [2024-06-27 18:53:10,500 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-27 18:53:10,501 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 90 transitions, 614 flow [2024-06-27 18:53:10,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:10,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:10,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:10,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:53:10,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:10,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1088860492, now seen corresponding path program 1 times [2024-06-27 18:53:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:10,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275476372] [2024-06-27 18:53:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:10,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:12,316 INFO 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 18:53:12,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275476372] [2024-06-27 18:53:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275476372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:12,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:12,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:53:12,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717027348] [2024-06-27 18:53:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:12,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:53:12,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:53:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:53:12,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:12,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 90 transitions, 614 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 18:53:12,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:12,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:12,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:13,693 INFO L124 PetriNetUnfolderBase]: 4466/6968 cut-off events. [2024-06-27 18:53:13,694 INFO L125 PetriNetUnfolderBase]: For 15693/15720 co-relation queries the response was YES. [2024-06-27 18:53:13,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23937 conditions, 6968 events. 4466/6968 cut-off events. For 15693/15720 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40464 event pairs, 1783 based on Foata normal form. 11/6795 useless extension candidates. Maximal degree in co-relation 23910. Up to 6384 conditions per place. [2024-06-27 18:53:13,731 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 101 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-06-27 18:53:13,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 121 transitions, 966 flow [2024-06-27 18:53:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:53:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:53:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 18:53:13,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-27 18:53:13,733 INFO L175 Difference]: Start difference. First operand has 74 places, 90 transitions, 614 flow. Second operand 5 states and 118 transitions. [2024-06-27 18:53:13,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 121 transitions, 966 flow [2024-06-27 18:53:13,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 916 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:53:13,745 INFO L231 Difference]: Finished difference. Result has 76 places, 96 transitions, 669 flow [2024-06-27 18:53:13,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=669, PETRI_PLACES=76, PETRI_TRANSITIONS=96} [2024-06-27 18:53:13,746 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-27 18:53:13,746 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 96 transitions, 669 flow [2024-06-27 18:53:13,746 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 18:53:13,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:13,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:13,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:53:13,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:13,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash -605060922, now seen corresponding path program 1 times [2024-06-27 18:53:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:13,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714856280] [2024-06-27 18:53:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:15,523 INFO 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 18:53:15,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714856280] [2024-06-27 18:53:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714856280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:15,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:53:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137226727] [2024-06-27 18:53:15,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:15,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:53:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:53:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:53:15,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:53:15,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 96 transitions, 669 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 18:53:15,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:15,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:53:15,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:17,234 INFO L124 PetriNetUnfolderBase]: 5275/8192 cut-off events. [2024-06-27 18:53:17,235 INFO L125 PetriNetUnfolderBase]: For 21251/21251 co-relation queries the response was YES. [2024-06-27 18:53:17,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28360 conditions, 8192 events. 5275/8192 cut-off events. For 21251/21251 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 47816 event pairs, 2118 based on Foata normal form. 4/7980 useless extension candidates. Maximal degree in co-relation 28330. Up to 7464 conditions per place. [2024-06-27 18:53:17,325 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 126 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2024-06-27 18:53:17,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 147 transitions, 1182 flow [2024-06-27 18:53:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 18:53:17,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:53:17,327 INFO L175 Difference]: Start difference. First operand has 76 places, 96 transitions, 669 flow. Second operand 6 states and 138 transitions. [2024-06-27 18:53:17,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 147 transitions, 1182 flow [2024-06-27 18:53:17,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 147 transitions, 1160 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:17,347 INFO L231 Difference]: Finished difference. Result has 83 places, 109 transitions, 832 flow [2024-06-27 18:53:17,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=832, PETRI_PLACES=83, PETRI_TRANSITIONS=109} [2024-06-27 18:53:17,349 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-27 18:53:17,349 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 109 transitions, 832 flow [2024-06-27 18:53:17,350 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 18:53:17,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:17,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:17,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:53:17,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:17,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash -966911675, now seen corresponding path program 1 times [2024-06-27 18:53:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:17,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386804146] [2024-06-27 18:53:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:19,190 INFO 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 18:53:19,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386804146] [2024-06-27 18:53:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386804146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:19,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:53:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867725787] [2024-06-27 18:53:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:53:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:53:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:53:19,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:19,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 109 transitions, 832 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:19,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:19,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:19,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:20,946 INFO L124 PetriNetUnfolderBase]: 5197/7960 cut-off events. [2024-06-27 18:53:20,946 INFO L125 PetriNetUnfolderBase]: For 28296/28537 co-relation queries the response was YES. [2024-06-27 18:53:20,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30317 conditions, 7960 events. 5197/7960 cut-off events. For 28296/28537 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 46363 event pairs, 1860 based on Foata normal form. 88/7839 useless extension candidates. Maximal degree in co-relation 30282. Up to 6946 conditions per place. [2024-06-27 18:53:20,992 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 123 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2024-06-27 18:53:20,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 1466 flow [2024-06-27 18:53:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 18:53:20,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-27 18:53:20,994 INFO L175 Difference]: Start difference. First operand has 83 places, 109 transitions, 832 flow. Second operand 6 states and 158 transitions. [2024-06-27 18:53:20,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 1466 flow [2024-06-27 18:53:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 170 transitions, 1460 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:21,026 INFO L231 Difference]: Finished difference. Result has 90 places, 122 transitions, 1070 flow [2024-06-27 18:53:21,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1070, PETRI_PLACES=90, PETRI_TRANSITIONS=122} [2024-06-27 18:53:21,027 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 36 predicate places. [2024-06-27 18:53:21,027 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 122 transitions, 1070 flow [2024-06-27 18:53:21,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:21,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:21,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:21,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:53:21,027 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:21,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash -203363091, now seen corresponding path program 2 times [2024-06-27 18:53:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:21,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840187017] [2024-06-27 18:53:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:21,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:22,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840187017] [2024-06-27 18:53:22,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840187017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:22,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:22,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:53:22,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836896916] [2024-06-27 18:53:22,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:22,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:53:22,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:53:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:53:22,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:22,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 122 transitions, 1070 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:22,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:22,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:22,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:24,679 INFO L124 PetriNetUnfolderBase]: 5312/8115 cut-off events. [2024-06-27 18:53:24,679 INFO L125 PetriNetUnfolderBase]: For 38000/38145 co-relation queries the response was YES. [2024-06-27 18:53:24,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33937 conditions, 8115 events. 5312/8115 cut-off events. For 38000/38145 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 47171 event pairs, 1803 based on Foata normal form. 33/7941 useless extension candidates. Maximal degree in co-relation 33897. Up to 7100 conditions per place. [2024-06-27 18:53:24,726 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 121 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-27 18:53:24,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 170 transitions, 1640 flow [2024-06-27 18:53:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:53:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:53:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:53:24,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 18:53:24,728 INFO L175 Difference]: Start difference. First operand has 90 places, 122 transitions, 1070 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:53:24,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 170 transitions, 1640 flow [2024-06-27 18:53:24,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 170 transitions, 1624 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:24,781 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1280 flow [2024-06-27 18:53:24,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1280, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2024-06-27 18:53:24,782 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-27 18:53:24,782 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1280 flow [2024-06-27 18:53:24,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:24,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:24,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:24,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:53:24,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:24,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash 509734825, now seen corresponding path program 1 times [2024-06-27 18:53:24,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:24,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942111752] [2024-06-27 18:53:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:24,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:26,710 INFO 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 18:53:26,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942111752] [2024-06-27 18:53:26,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942111752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:26,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:26,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459816738] [2024-06-27 18:53:26,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:26,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:26,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:26,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1280 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:26,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:26,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:26,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:28,822 INFO L124 PetriNetUnfolderBase]: 5588/8690 cut-off events. [2024-06-27 18:53:28,822 INFO L125 PetriNetUnfolderBase]: For 46118/46517 co-relation queries the response was YES. [2024-06-27 18:53:28,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37358 conditions, 8690 events. 5588/8690 cut-off events. For 46118/46517 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 52281 event pairs, 2002 based on Foata normal form. 103/8519 useless extension candidates. Maximal degree in co-relation 37313. Up to 7508 conditions per place. [2024-06-27 18:53:28,889 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 172 selfloop transitions, 57 changer transitions 0/239 dead transitions. [2024-06-27 18:53:28,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 239 transitions, 2462 flow [2024-06-27 18:53:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:53:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:53:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:53:28,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 18:53:28,891 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1280 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:53:28,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 239 transitions, 2462 flow [2024-06-27 18:53:28,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 239 transitions, 2411 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:28,960 INFO L231 Difference]: Finished difference. Result has 107 places, 174 transitions, 1934 flow [2024-06-27 18:53:28,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1934, PETRI_PLACES=107, PETRI_TRANSITIONS=174} [2024-06-27 18:53:28,961 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-06-27 18:53:28,961 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 174 transitions, 1934 flow [2024-06-27 18:53:28,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:28,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:28,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:28,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:53:28,962 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:28,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1849940277, now seen corresponding path program 2 times [2024-06-27 18:53:28,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:28,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188529854] [2024-06-27 18:53:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:28,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:30,913 INFO 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 18:53:30,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188529854] [2024-06-27 18:53:30,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188529854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:30,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:30,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396574057] [2024-06-27 18:53:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:30,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:30,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:30,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:30,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 174 transitions, 1934 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:30,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:30,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:30,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:32,735 INFO L124 PetriNetUnfolderBase]: 5672/8816 cut-off events. [2024-06-27 18:53:32,735 INFO L125 PetriNetUnfolderBase]: For 62880/63432 co-relation queries the response was YES. [2024-06-27 18:53:32,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42901 conditions, 8816 events. 5672/8816 cut-off events. For 62880/63432 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 53179 event pairs, 1808 based on Foata normal form. 172/8718 useless extension candidates. Maximal degree in co-relation 42850. Up to 7774 conditions per place. [2024-06-27 18:53:32,810 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 189 selfloop transitions, 43 changer transitions 0/242 dead transitions. [2024-06-27 18:53:32,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 242 transitions, 2807 flow [2024-06-27 18:53:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:53:32,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-27 18:53:32,812 INFO L175 Difference]: Start difference. First operand has 107 places, 174 transitions, 1934 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:53:32,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 242 transitions, 2807 flow [2024-06-27 18:53:32,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 242 transitions, 2725 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-27 18:53:32,925 INFO L231 Difference]: Finished difference. Result has 114 places, 188 transitions, 2177 flow [2024-06-27 18:53:32,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2177, PETRI_PLACES=114, PETRI_TRANSITIONS=188} [2024-06-27 18:53:32,926 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-27 18:53:32,926 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 188 transitions, 2177 flow [2024-06-27 18:53:32,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:32,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:32,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:32,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:53:32,927 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:32,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1849820307, now seen corresponding path program 3 times [2024-06-27 18:53:32,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:32,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989176868] [2024-06-27 18:53:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:34,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989176868] [2024-06-27 18:53:34,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989176868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:34,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:34,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:34,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019319928] [2024-06-27 18:53:34,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:34,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:34,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:34,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:34,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:34,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 188 transitions, 2177 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:34,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:34,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:34,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:36,680 INFO L124 PetriNetUnfolderBase]: 5824/9038 cut-off events. [2024-06-27 18:53:36,681 INFO L125 PetriNetUnfolderBase]: For 77593/78283 co-relation queries the response was YES. [2024-06-27 18:53:36,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46437 conditions, 9038 events. 5824/9038 cut-off events. For 77593/78283 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 54632 event pairs, 1999 based on Foata normal form. 229/8985 useless extension candidates. Maximal degree in co-relation 46382. Up to 7939 conditions per place. [2024-06-27 18:53:36,756 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 184 selfloop transitions, 54 changer transitions 0/248 dead transitions. [2024-06-27 18:53:36,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 248 transitions, 2985 flow [2024-06-27 18:53:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:53:36,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 18:53:36,758 INFO L175 Difference]: Start difference. First operand has 114 places, 188 transitions, 2177 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:53:36,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 248 transitions, 2985 flow [2024-06-27 18:53:36,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 248 transitions, 2905 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 18:53:36,857 INFO L231 Difference]: Finished difference. Result has 118 places, 200 transitions, 2365 flow [2024-06-27 18:53:36,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2365, PETRI_PLACES=118, PETRI_TRANSITIONS=200} [2024-06-27 18:53:36,858 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-27 18:53:36,858 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 200 transitions, 2365 flow [2024-06-27 18:53:36,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:36,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:36,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:36,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:53:36,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:36,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1849820121, now seen corresponding path program 1 times [2024-06-27 18:53:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:36,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039671246] [2024-06-27 18:53:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:36,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:38,776 INFO 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 18:53:38,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:38,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039671246] [2024-06-27 18:53:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039671246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:38,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786459883] [2024-06-27 18:53:38,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:38,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:38,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:53:38,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 200 transitions, 2365 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 18:53:38,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:38,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:53:38,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:41,026 INFO L124 PetriNetUnfolderBase]: 6304/9649 cut-off events. [2024-06-27 18:53:41,027 INFO L125 PetriNetUnfolderBase]: For 79362/79370 co-relation queries the response was YES. [2024-06-27 18:53:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49474 conditions, 9649 events. 6304/9649 cut-off events. For 79362/79370 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 56345 event pairs, 2049 based on Foata normal form. 12/9427 useless extension candidates. Maximal degree in co-relation 49417. Up to 8620 conditions per place. [2024-06-27 18:53:41,115 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 253 selfloop transitions, 35 changer transitions 0/294 dead transitions. [2024-06-27 18:53:41,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 294 transitions, 3611 flow [2024-06-27 18:53:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:53:41,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 18:53:41,117 INFO L175 Difference]: Start difference. First operand has 118 places, 200 transitions, 2365 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:53:41,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 294 transitions, 3611 flow [2024-06-27 18:53:41,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 294 transitions, 3473 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 18:53:41,233 INFO L231 Difference]: Finished difference. Result has 124 places, 223 transitions, 2662 flow [2024-06-27 18:53:41,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2662, PETRI_PLACES=124, PETRI_TRANSITIONS=223} [2024-06-27 18:53:41,233 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-27 18:53:41,233 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 223 transitions, 2662 flow [2024-06-27 18:53:41,234 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 18:53:41,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:41,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:41,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:53:41,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:41,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2009019421, now seen corresponding path program 2 times [2024-06-27 18:53:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:41,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506992116] [2024-06-27 18:53:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:43,040 INFO 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 18:53:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506992116] [2024-06-27 18:53:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506992116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:43,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385490161] [2024-06-27 18:53:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:43,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:53:43,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 223 transitions, 2662 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 18:53:43,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:43,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:53:43,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:45,502 INFO L124 PetriNetUnfolderBase]: 6366/9798 cut-off events. [2024-06-27 18:53:45,503 INFO L125 PetriNetUnfolderBase]: For 84108/84147 co-relation queries the response was YES. [2024-06-27 18:53:45,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50928 conditions, 9798 events. 6366/9798 cut-off events. For 84108/84147 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 57821 event pairs, 2060 based on Foata normal form. 30/9572 useless extension candidates. Maximal degree in co-relation 50868. Up to 8672 conditions per place. [2024-06-27 18:53:45,575 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 244 selfloop transitions, 43 changer transitions 0/293 dead transitions. [2024-06-27 18:53:45,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 293 transitions, 3625 flow [2024-06-27 18:53:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:53:45,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 18:53:45,577 INFO L175 Difference]: Start difference. First operand has 124 places, 223 transitions, 2662 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:53:45,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 293 transitions, 3625 flow [2024-06-27 18:53:45,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 293 transitions, 3583 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:53:45,682 INFO L231 Difference]: Finished difference. Result has 129 places, 231 transitions, 2811 flow [2024-06-27 18:53:45,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2811, PETRI_PLACES=129, PETRI_TRANSITIONS=231} [2024-06-27 18:53:45,683 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-27 18:53:45,683 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 231 transitions, 2811 flow [2024-06-27 18:53:45,683 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 18:53:45,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:45,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:53:45,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:45,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1643166681, now seen corresponding path program 3 times [2024-06-27 18:53:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:45,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749191241] [2024-06-27 18:53:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:47,551 INFO 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 18:53:47,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:47,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749191241] [2024-06-27 18:53:47,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749191241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:47,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:47,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247143979] [2024-06-27 18:53:47,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:47,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:53:47,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 231 transitions, 2811 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 18:53:47,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:47,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:53:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:49,857 INFO L124 PetriNetUnfolderBase]: 6356/9785 cut-off events. [2024-06-27 18:53:49,858 INFO L125 PetriNetUnfolderBase]: For 87465/87504 co-relation queries the response was YES. [2024-06-27 18:53:49,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51143 conditions, 9785 events. 6356/9785 cut-off events. For 87465/87504 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 57674 event pairs, 2064 based on Foata normal form. 30/9559 useless extension candidates. Maximal degree in co-relation 51081. Up to 8664 conditions per place. [2024-06-27 18:53:49,941 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 249 selfloop transitions, 40 changer transitions 0/295 dead transitions. [2024-06-27 18:53:49,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 295 transitions, 3680 flow [2024-06-27 18:53:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:53:49,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 18:53:49,943 INFO L175 Difference]: Start difference. First operand has 129 places, 231 transitions, 2811 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:53:49,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 295 transitions, 3680 flow [2024-06-27 18:53:50,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 295 transitions, 3639 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 18:53:50,064 INFO L231 Difference]: Finished difference. Result has 134 places, 231 transitions, 2860 flow [2024-06-27 18:53:50,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2860, PETRI_PLACES=134, PETRI_TRANSITIONS=231} [2024-06-27 18:53:50,065 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-27 18:53:50,065 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 231 transitions, 2860 flow [2024-06-27 18:53:50,065 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 18:53:50,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:50,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:50,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:53:50,066 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:50,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1844256117, now seen corresponding path program 4 times [2024-06-27 18:53:50,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:50,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671865823] [2024-06-27 18:53:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:51,804 INFO 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 18:53:51,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671865823] [2024-06-27 18:53:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671865823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:51,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:51,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:53:51,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629775101] [2024-06-27 18:53:51,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:51,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:53:51,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:51,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:53:51,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:53:51,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:53:51,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 231 transitions, 2860 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:51,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:51,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:53:51,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:54,021 INFO L124 PetriNetUnfolderBase]: 5970/9264 cut-off events. [2024-06-27 18:53:54,021 INFO L125 PetriNetUnfolderBase]: For 99654/100236 co-relation queries the response was YES. [2024-06-27 18:53:54,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50747 conditions, 9264 events. 5970/9264 cut-off events. For 99654/100236 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 56125 event pairs, 1919 based on Foata normal form. 88/8960 useless extension candidates. Maximal degree in co-relation 50683. Up to 8059 conditions per place. [2024-06-27 18:53:54,098 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 205 selfloop transitions, 61 changer transitions 0/282 dead transitions. [2024-06-27 18:53:54,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 282 transitions, 3696 flow [2024-06-27 18:53:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:53:54,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:53:54,100 INFO L175 Difference]: Start difference. First operand has 134 places, 231 transitions, 2860 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:53:54,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 282 transitions, 3696 flow [2024-06-27 18:53:54,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 282 transitions, 3614 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 18:53:54,232 INFO L231 Difference]: Finished difference. Result has 136 places, 235 transitions, 2986 flow [2024-06-27 18:53:54,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2986, PETRI_PLACES=136, PETRI_TRANSITIONS=235} [2024-06-27 18:53:54,233 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-27 18:53:54,233 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 235 transitions, 2986 flow [2024-06-27 18:53:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:53:54,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:54,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:53:54,234 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:54,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1642889851, now seen corresponding path program 1 times [2024-06-27 18:53:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633551827] [2024-06-27 18:53:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:53:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:53:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:53:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633551827] [2024-06-27 18:53:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633551827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:53:57,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:53:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:53:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006634810] [2024-06-27 18:53:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:53:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:53:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:53:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:53:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:53:57,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:53:57,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 235 transitions, 2986 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 18:53:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:53:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:53:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:53:59,469 INFO L124 PetriNetUnfolderBase]: 6400/9883 cut-off events. [2024-06-27 18:53:59,469 INFO L125 PetriNetUnfolderBase]: For 102633/102633 co-relation queries the response was YES. [2024-06-27 18:53:59,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53434 conditions, 9883 events. 6400/9883 cut-off events. For 102633/102633 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58891 event pairs, 2131 based on Foata normal form. 4/9623 useless extension candidates. Maximal degree in co-relation 53369. Up to 8956 conditions per place. [2024-06-27 18:53:59,544 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 262 selfloop transitions, 19 changer transitions 0/287 dead transitions. [2024-06-27 18:53:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 287 transitions, 3763 flow [2024-06-27 18:53:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:53:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:53:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:53:59,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:53:59,546 INFO L175 Difference]: Start difference. First operand has 136 places, 235 transitions, 2986 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:53:59,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 287 transitions, 3763 flow [2024-06-27 18:53:59,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 287 transitions, 3589 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 18:53:59,673 INFO L231 Difference]: Finished difference. Result has 139 places, 237 transitions, 2882 flow [2024-06-27 18:53:59,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2882, PETRI_PLACES=139, PETRI_TRANSITIONS=237} [2024-06-27 18:53:59,673 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 85 predicate places. [2024-06-27 18:53:59,673 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 237 transitions, 2882 flow [2024-06-27 18:53:59,674 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 18:53:59,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:53:59,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:53:59,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:53:59,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:53:59,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:53:59,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1513575420, now seen corresponding path program 1 times [2024-06-27 18:53:59,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:53:59,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122542011] [2024-06-27 18:53:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:53:59,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:53:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:01,544 INFO 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 18:54:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122542011] [2024-06-27 18:54:01,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122542011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:01,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:01,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189801108] [2024-06-27 18:54:01,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:01,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:01,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:01,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:54:01,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 237 transitions, 2882 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:01,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:01,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:54:01,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:03,763 INFO L124 PetriNetUnfolderBase]: 6289/9727 cut-off events. [2024-06-27 18:54:03,763 INFO L125 PetriNetUnfolderBase]: For 122235/122843 co-relation queries the response was YES. [2024-06-27 18:54:03,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55398 conditions, 9727 events. 6289/9727 cut-off events. For 122235/122843 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 59289 event pairs, 1727 based on Foata normal form. 182/9487 useless extension candidates. Maximal degree in co-relation 55332. Up to 7495 conditions per place. [2024-06-27 18:54:03,850 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 178 selfloop transitions, 135 changer transitions 0/330 dead transitions. [2024-06-27 18:54:03,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 330 transitions, 4230 flow [2024-06-27 18:54:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 18:54:03,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755208333333334 [2024-06-27 18:54:03,852 INFO L175 Difference]: Start difference. First operand has 139 places, 237 transitions, 2882 flow. Second operand 8 states and 221 transitions. [2024-06-27 18:54:03,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 330 transitions, 4230 flow [2024-06-27 18:54:04,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 330 transitions, 4185 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:54:04,016 INFO L231 Difference]: Finished difference. Result has 143 places, 251 transitions, 3425 flow [2024-06-27 18:54:04,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=143, PETRI_TRANSITIONS=251} [2024-06-27 18:54:04,017 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-27 18:54:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 251 transitions, 3425 flow [2024-06-27 18:54:04,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:04,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:04,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:54:04,018 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:04,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:04,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1492838367, now seen corresponding path program 1 times [2024-06-27 18:54:04,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:04,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928092887] [2024-06-27 18:54:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:04,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:06,471 INFO 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 18:54:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928092887] [2024-06-27 18:54:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928092887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121991341] [2024-06-27 18:54:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:06,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:54:06,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 251 transitions, 3425 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 18:54:06,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:06,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:54:06,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:08,742 INFO L124 PetriNetUnfolderBase]: 6826/10478 cut-off events. [2024-06-27 18:54:08,742 INFO L125 PetriNetUnfolderBase]: For 129162/129176 co-relation queries the response was YES. [2024-06-27 18:54:08,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60595 conditions, 10478 events. 6826/10478 cut-off events. For 129162/129176 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 62647 event pairs, 2018 based on Foata normal form. 22/10231 useless extension candidates. Maximal degree in co-relation 60527. Up to 9335 conditions per place. [2024-06-27 18:54:08,834 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 305 selfloop transitions, 31 changer transitions 0/342 dead transitions. [2024-06-27 18:54:08,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 342 transitions, 4676 flow [2024-06-27 18:54:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 18:54:08,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:54:08,836 INFO L175 Difference]: Start difference. First operand has 143 places, 251 transitions, 3425 flow. Second operand 8 states and 192 transitions. [2024-06-27 18:54:08,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 342 transitions, 4676 flow [2024-06-27 18:54:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 342 transitions, 4454 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 18:54:09,050 INFO L231 Difference]: Finished difference. Result has 151 places, 275 transitions, 3605 flow [2024-06-27 18:54:09,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3605, PETRI_PLACES=151, PETRI_TRANSITIONS=275} [2024-06-27 18:54:09,050 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-27 18:54:09,050 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 275 transitions, 3605 flow [2024-06-27 18:54:09,050 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 18:54:09,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:09,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:54:09,051 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:09,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1492838522, now seen corresponding path program 2 times [2024-06-27 18:54:09,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843336642] [2024-06-27 18:54:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:09,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:11,796 INFO 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 18:54:11,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843336642] [2024-06-27 18:54:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843336642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:11,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:11,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:11,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488060008] [2024-06-27 18:54:11,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:11,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:11,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:54:11,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 275 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:11,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:11,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:54:11,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:14,373 INFO L124 PetriNetUnfolderBase]: 6622/10197 cut-off events. [2024-06-27 18:54:14,373 INFO L125 PetriNetUnfolderBase]: For 148160/149155 co-relation queries the response was YES. [2024-06-27 18:54:14,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62070 conditions, 10197 events. 6622/10197 cut-off events. For 148160/149155 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 61938 event pairs, 1708 based on Foata normal form. 111/9820 useless extension candidates. Maximal degree in co-relation 61997. Up to 8792 conditions per place. [2024-06-27 18:54:14,481 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 252 selfloop transitions, 71 changer transitions 0/345 dead transitions. [2024-06-27 18:54:14,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 345 transitions, 4628 flow [2024-06-27 18:54:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:54:14,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 18:54:14,483 INFO L175 Difference]: Start difference. First operand has 151 places, 275 transitions, 3605 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:54:14,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 345 transitions, 4628 flow [2024-06-27 18:54:14,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 345 transitions, 4590 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 18:54:14,744 INFO L231 Difference]: Finished difference. Result has 158 places, 279 transitions, 3808 flow [2024-06-27 18:54:14,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3808, PETRI_PLACES=158, PETRI_TRANSITIONS=279} [2024-06-27 18:54:14,748 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 104 predicate places. [2024-06-27 18:54:14,749 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 279 transitions, 3808 flow [2024-06-27 18:54:14,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:14,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:14,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:14,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:54:14,749 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:14,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1509846895, now seen corresponding path program 2 times [2024-06-27 18:54:14,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:14,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263781409] [2024-06-27 18:54:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:14,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:16,568 INFO 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 18:54:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263781409] [2024-06-27 18:54:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263781409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:16,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:16,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:16,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070748210] [2024-06-27 18:54:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:16,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:16,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:16,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:54:16,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 279 transitions, 3808 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 18:54:16,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:16,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:54:16,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:19,070 INFO L124 PetriNetUnfolderBase]: 6932/10660 cut-off events. [2024-06-27 18:54:19,070 INFO L125 PetriNetUnfolderBase]: For 142424/142444 co-relation queries the response was YES. [2024-06-27 18:54:19,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63677 conditions, 10660 events. 6932/10660 cut-off events. For 142424/142444 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 63810 event pairs, 2062 based on Foata normal form. 24/10401 useless extension candidates. Maximal degree in co-relation 63601. Up to 9568 conditions per place. [2024-06-27 18:54:19,182 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 309 selfloop transitions, 43 changer transitions 0/358 dead transitions. [2024-06-27 18:54:19,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 358 transitions, 4876 flow [2024-06-27 18:54:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 18:54:19,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:54:19,183 INFO L175 Difference]: Start difference. First operand has 158 places, 279 transitions, 3808 flow. Second operand 8 states and 184 transitions. [2024-06-27 18:54:19,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 358 transitions, 4876 flow [2024-06-27 18:54:19,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 358 transitions, 4697 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 18:54:19,480 INFO L231 Difference]: Finished difference. Result has 164 places, 306 transitions, 4016 flow [2024-06-27 18:54:19,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4016, PETRI_PLACES=164, PETRI_TRANSITIONS=306} [2024-06-27 18:54:19,481 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-06-27 18:54:19,481 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 306 transitions, 4016 flow [2024-06-27 18:54:19,481 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 18:54:19,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:19,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:19,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:54:19,482 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:19,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash 373535564, now seen corresponding path program 3 times [2024-06-27 18:54:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:19,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245183607] [2024-06-27 18:54:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:19,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:22,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245183607] [2024-06-27 18:54:22,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245183607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:22,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:22,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:22,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396870541] [2024-06-27 18:54:22,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:22,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:22,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:22,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:54:22,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 306 transitions, 4016 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:22,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:22,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:54:22,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:24,879 INFO L124 PetriNetUnfolderBase]: 6781/10461 cut-off events. [2024-06-27 18:54:24,879 INFO L125 PetriNetUnfolderBase]: For 173532/174462 co-relation queries the response was YES. [2024-06-27 18:54:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66662 conditions, 10461 events. 6781/10461 cut-off events. For 173532/174462 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 63798 event pairs, 1809 based on Foata normal form. 145/10134 useless extension candidates. Maximal degree in co-relation 66581. Up to 8979 conditions per place. [2024-06-27 18:54:24,980 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 262 selfloop transitions, 78 changer transitions 0/370 dead transitions. [2024-06-27 18:54:24,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 370 transitions, 5034 flow [2024-06-27 18:54:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:54:24,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:54:24,982 INFO L175 Difference]: Start difference. First operand has 164 places, 306 transitions, 4016 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:54:24,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 370 transitions, 5034 flow [2024-06-27 18:54:25,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 370 transitions, 4984 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 18:54:25,239 INFO L231 Difference]: Finished difference. Result has 171 places, 311 transitions, 4207 flow [2024-06-27 18:54:25,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4207, PETRI_PLACES=171, PETRI_TRANSITIONS=311} [2024-06-27 18:54:25,240 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2024-06-27 18:54:25,240 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 311 transitions, 4207 flow [2024-06-27 18:54:25,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:25,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:25,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:25,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:54:25,241 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:25,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1509852475, now seen corresponding path program 3 times [2024-06-27 18:54:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725214114] [2024-06-27 18:54:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:27,262 INFO 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 18:54:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725214114] [2024-06-27 18:54:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725214114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:27,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951450370] [2024-06-27 18:54:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:27,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:27,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:27,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:54:27,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 311 transitions, 4207 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 18:54:27,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:27,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:54:27,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:29,740 INFO L124 PetriNetUnfolderBase]: 7098/10894 cut-off events. [2024-06-27 18:54:29,741 INFO L125 PetriNetUnfolderBase]: For 158863/158886 co-relation queries the response was YES. [2024-06-27 18:54:29,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67725 conditions, 10894 events. 7098/10894 cut-off events. For 158863/158886 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 65249 event pairs, 2080 based on Foata normal form. 26/10635 useless extension candidates. Maximal degree in co-relation 67641. Up to 9698 conditions per place. [2024-06-27 18:54:29,867 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 321 selfloop transitions, 49 changer transitions 0/376 dead transitions. [2024-06-27 18:54:29,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 376 transitions, 5257 flow [2024-06-27 18:54:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 18:54:29,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-06-27 18:54:29,869 INFO L175 Difference]: Start difference. First operand has 171 places, 311 transitions, 4207 flow. Second operand 8 states and 189 transitions. [2024-06-27 18:54:29,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 376 transitions, 5257 flow [2024-06-27 18:54:30,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 376 transitions, 5056 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 18:54:30,225 INFO L231 Difference]: Finished difference. Result has 174 places, 319 transitions, 4236 flow [2024-06-27 18:54:30,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4012, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=174, PETRI_TRANSITIONS=319} [2024-06-27 18:54:30,226 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 120 predicate places. [2024-06-27 18:54:30,226 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 319 transitions, 4236 flow [2024-06-27 18:54:30,226 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 18:54:30,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:30,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:30,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:54:30,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:30,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1022170639, now seen corresponding path program 4 times [2024-06-27 18:54:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842454948] [2024-06-27 18:54:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:32,032 INFO 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 18:54:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842454948] [2024-06-27 18:54:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842454948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:32,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:32,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187474308] [2024-06-27 18:54:32,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:32,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:32,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:32,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:32,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:54:32,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 319 transitions, 4236 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 18:54:32,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:32,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:54:32,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:34,637 INFO L124 PetriNetUnfolderBase]: 7160/10992 cut-off events. [2024-06-27 18:54:34,638 INFO L125 PetriNetUnfolderBase]: For 168950/169004 co-relation queries the response was YES. [2024-06-27 18:54:34,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69152 conditions, 10992 events. 7160/10992 cut-off events. For 168950/169004 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 65885 event pairs, 2094 based on Foata normal form. 40/10741 useless extension candidates. Maximal degree in co-relation 69066. Up to 9882 conditions per place. [2024-06-27 18:54:34,771 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 322 selfloop transitions, 47 changer transitions 0/375 dead transitions. [2024-06-27 18:54:34,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 375 transitions, 5210 flow [2024-06-27 18:54:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 18:54:34,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661458333333333 [2024-06-27 18:54:34,774 INFO L175 Difference]: Start difference. First operand has 174 places, 319 transitions, 4236 flow. Second operand 8 states and 179 transitions. [2024-06-27 18:54:34,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 375 transitions, 5210 flow [2024-06-27 18:54:35,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 375 transitions, 5131 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 18:54:35,187 INFO L231 Difference]: Finished difference. Result has 178 places, 324 transitions, 4327 flow [2024-06-27 18:54:35,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4327, PETRI_PLACES=178, PETRI_TRANSITIONS=324} [2024-06-27 18:54:35,196 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2024-06-27 18:54:35,196 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 324 transitions, 4327 flow [2024-06-27 18:54:35,196 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 18:54:35,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:35,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:35,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:54:35,197 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:35,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:35,197 INFO L85 PathProgramCache]: Analyzing trace with hash 601442449, now seen corresponding path program 5 times [2024-06-27 18:54:35,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:35,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144222436] [2024-06-27 18:54:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:35,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:37,055 INFO 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 18:54:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144222436] [2024-06-27 18:54:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144222436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561316070] [2024-06-27 18:54:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:54:37,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 324 transitions, 4327 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 18:54:37,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:37,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:54:37,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:39,857 INFO L124 PetriNetUnfolderBase]: 7222/11082 cut-off events. [2024-06-27 18:54:39,857 INFO L125 PetriNetUnfolderBase]: For 179499/179553 co-relation queries the response was YES. [2024-06-27 18:54:39,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70936 conditions, 11082 events. 7222/11082 cut-off events. For 179499/179553 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 66519 event pairs, 2079 based on Foata normal form. 40/10830 useless extension candidates. Maximal degree in co-relation 70848. Up to 9882 conditions per place. [2024-06-27 18:54:39,966 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 333 selfloop transitions, 56 changer transitions 0/395 dead transitions. [2024-06-27 18:54:39,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 395 transitions, 5486 flow [2024-06-27 18:54:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:54:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:54:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 18:54:39,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 18:54:39,968 INFO L175 Difference]: Start difference. First operand has 178 places, 324 transitions, 4327 flow. Second operand 8 states and 183 transitions. [2024-06-27 18:54:39,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 395 transitions, 5486 flow [2024-06-27 18:54:40,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 395 transitions, 5385 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 18:54:40,288 INFO L231 Difference]: Finished difference. Result has 186 places, 343 transitions, 4639 flow [2024-06-27 18:54:40,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=186, PETRI_TRANSITIONS=343} [2024-06-27 18:54:40,289 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-27 18:54:40,289 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 343 transitions, 4639 flow [2024-06-27 18:54:40,289 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 18:54:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:54:40,289 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:40,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash 601436869, now seen corresponding path program 6 times [2024-06-27 18:54:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769410439] [2024-06-27 18:54:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:42,283 INFO 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 18:54:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769410439] [2024-06-27 18:54:42,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769410439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:42,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:42,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:42,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659955986] [2024-06-27 18:54:42,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:42,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:42,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:42,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:54:42,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 343 transitions, 4639 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 18:54:42,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:42,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:54:42,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:45,446 INFO L124 PetriNetUnfolderBase]: 7521/11488 cut-off events. [2024-06-27 18:54:45,447 INFO L125 PetriNetUnfolderBase]: For 201658/201712 co-relation queries the response was YES. [2024-06-27 18:54:45,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76006 conditions, 11488 events. 7521/11488 cut-off events. For 201658/201712 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68672 event pairs, 2050 based on Foata normal form. 40/11238 useless extension candidates. Maximal degree in co-relation 75914. Up to 9925 conditions per place. [2024-06-27 18:54:45,575 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 377 selfloop transitions, 78 changer transitions 0/461 dead transitions. [2024-06-27 18:54:45,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 461 transitions, 6556 flow [2024-06-27 18:54:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:54:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:54:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 18:54:45,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 18:54:45,576 INFO L175 Difference]: Start difference. First operand has 186 places, 343 transitions, 4639 flow. Second operand 10 states and 235 transitions. [2024-06-27 18:54:45,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 461 transitions, 6556 flow [2024-06-27 18:54:46,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 461 transitions, 6416 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-27 18:54:46,075 INFO L231 Difference]: Finished difference. Result has 197 places, 378 transitions, 5257 flow [2024-06-27 18:54:46,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5257, PETRI_PLACES=197, PETRI_TRANSITIONS=378} [2024-06-27 18:54:46,076 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 143 predicate places. [2024-06-27 18:54:46,076 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 378 transitions, 5257 flow [2024-06-27 18:54:46,077 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 18:54:46,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:46,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:46,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:54:46,077 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:46,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash 601436714, now seen corresponding path program 4 times [2024-06-27 18:54:46,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:46,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887826572] [2024-06-27 18:54:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:46,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:54:48,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887826572] [2024-06-27 18:54:48,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887826572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:48,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:48,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:54:48,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179406721] [2024-06-27 18:54:48,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:48,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:54:48,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:48,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:54:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:54:48,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:54:48,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 378 transitions, 5257 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:48,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:48,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:54:48,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:51,167 INFO L124 PetriNetUnfolderBase]: 7799/11927 cut-off events. [2024-06-27 18:54:51,167 INFO L125 PetriNetUnfolderBase]: For 265888/266960 co-relation queries the response was YES. [2024-06-27 18:54:51,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86722 conditions, 11927 events. 7799/11927 cut-off events. For 265888/266960 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 72809 event pairs, 1785 based on Foata normal form. 87/11518 useless extension candidates. Maximal degree in co-relation 86625. Up to 9733 conditions per place. [2024-06-27 18:54:51,301 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 339 selfloop transitions, 158 changer transitions 0/542 dead transitions. [2024-06-27 18:54:51,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 542 transitions, 8313 flow [2024-06-27 18:54:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:54:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:54:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 18:54:51,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:54:51,304 INFO L175 Difference]: Start difference. First operand has 197 places, 378 transitions, 5257 flow. Second operand 10 states and 250 transitions. [2024-06-27 18:54:51,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 542 transitions, 8313 flow [2024-06-27 18:54:51,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 542 transitions, 8069 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-27 18:54:51,811 INFO L231 Difference]: Finished difference. Result has 206 places, 457 transitions, 6949 flow [2024-06-27 18:54:51,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6949, PETRI_PLACES=206, PETRI_TRANSITIONS=457} [2024-06-27 18:54:51,812 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 152 predicate places. [2024-06-27 18:54:51,812 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 457 transitions, 6949 flow [2024-06-27 18:54:51,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:54:51,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:51,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:51,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:54:51,813 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:51,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:51,813 INFO L85 PathProgramCache]: Analyzing trace with hash -140913368, now seen corresponding path program 1 times [2024-06-27 18:54:51,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:51,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972608536] [2024-06-27 18:54:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:51,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:54:54,808 INFO 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 18:54:54,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:54:54,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972608536] [2024-06-27 18:54:54,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972608536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:54:54,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:54:54,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:54:54,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819847733] [2024-06-27 18:54:54,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:54:54,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:54:54,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:54:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:54:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:54:54,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:54:54,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 457 transitions, 6949 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:54:54,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:54:54,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:54:54,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:54:58,273 INFO L124 PetriNetUnfolderBase]: 8522/13147 cut-off events. [2024-06-27 18:54:58,274 INFO L125 PetriNetUnfolderBase]: For 332082/333623 co-relation queries the response was YES. [2024-06-27 18:54:58,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99426 conditions, 13147 events. 8522/13147 cut-off events. For 332082/333623 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 82758 event pairs, 1293 based on Foata normal form. 215/12809 useless extension candidates. Maximal degree in co-relation 99325. Up to 9702 conditions per place. [2024-06-27 18:54:58,446 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 354 selfloop transitions, 171 changer transitions 0/570 dead transitions. [2024-06-27 18:54:58,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 570 transitions, 9077 flow [2024-06-27 18:54:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:54:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:54:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-27 18:54:58,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717592592592593 [2024-06-27 18:54:58,453 INFO L175 Difference]: Start difference. First operand has 206 places, 457 transitions, 6949 flow. Second operand 9 states and 247 transitions. [2024-06-27 18:54:58,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 570 transitions, 9077 flow [2024-06-27 18:54:59,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 570 transitions, 8745 flow, removed 130 selfloop flow, removed 4 redundant places. [2024-06-27 18:54:59,166 INFO L231 Difference]: Finished difference. Result has 213 places, 473 transitions, 7423 flow [2024-06-27 18:54:59,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7423, PETRI_PLACES=213, PETRI_TRANSITIONS=473} [2024-06-27 18:54:59,167 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 159 predicate places. [2024-06-27 18:54:59,167 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 473 transitions, 7423 flow [2024-06-27 18:54:59,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:54:59,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:54:59,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:54:59,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:54:59,167 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:54:59,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:54:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash 783934802, now seen corresponding path program 1 times [2024-06-27 18:54:59,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:54:59,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246622914] [2024-06-27 18:54:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:54:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:54:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:01,524 INFO 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 18:55:01,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:01,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246622914] [2024-06-27 18:55:01,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246622914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:01,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:01,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:01,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911197442] [2024-06-27 18:55:01,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:01,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:01,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:01,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:55:01,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 473 transitions, 7423 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 18:55:01,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:01,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:55:01,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:05,515 INFO L124 PetriNetUnfolderBase]: 8932/13733 cut-off events. [2024-06-27 18:55:05,516 INFO L125 PetriNetUnfolderBase]: For 328008/328037 co-relation queries the response was YES. [2024-06-27 18:55:05,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103412 conditions, 13733 events. 8932/13733 cut-off events. For 328008/328037 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 85835 event pairs, 2070 based on Foata normal form. 30/13391 useless extension candidates. Maximal degree in co-relation 103307. Up to 11361 conditions per place. [2024-06-27 18:55:05,697 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 474 selfloop transitions, 137 changer transitions 0/617 dead transitions. [2024-06-27 18:55:05,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 617 transitions, 10027 flow [2024-06-27 18:55:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:55:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:55:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:55:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439814814814815 [2024-06-27 18:55:05,716 INFO L175 Difference]: Start difference. First operand has 213 places, 473 transitions, 7423 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:55:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 617 transitions, 10027 flow [2024-06-27 18:55:06,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 617 transitions, 9767 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 18:55:06,808 INFO L231 Difference]: Finished difference. Result has 221 places, 503 transitions, 8075 flow [2024-06-27 18:55:06,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8075, PETRI_PLACES=221, PETRI_TRANSITIONS=503} [2024-06-27 18:55:06,809 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 167 predicate places. [2024-06-27 18:55:06,809 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 503 transitions, 8075 flow [2024-06-27 18:55:06,810 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 18:55:06,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:06,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:06,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:55:06,810 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:06,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 321123116, now seen corresponding path program 2 times [2024-06-27 18:55:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:06,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941731834] [2024-06-27 18:55:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:09,099 INFO 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 18:55:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941731834] [2024-06-27 18:55:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941731834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:09,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589816315] [2024-06-27 18:55:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:09,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:09,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:55:09,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 503 transitions, 8075 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:55:09,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:09,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:55:09,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:12,941 INFO L124 PetriNetUnfolderBase]: 8841/13592 cut-off events. [2024-06-27 18:55:12,942 INFO L125 PetriNetUnfolderBase]: For 376140/377374 co-relation queries the response was YES. [2024-06-27 18:55:13,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108213 conditions, 13592 events. 8841/13592 cut-off events. For 376140/377374 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 85846 event pairs, 1698 based on Foata normal form. 74/13119 useless extension candidates. Maximal degree in co-relation 108103. Up to 10348 conditions per place. [2024-06-27 18:55:13,111 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 305 selfloop transitions, 250 changer transitions 0/604 dead transitions. [2024-06-27 18:55:13,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 604 transitions, 10018 flow [2024-06-27 18:55:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:55:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:55:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 18:55:13,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-27 18:55:13,113 INFO L175 Difference]: Start difference. First operand has 221 places, 503 transitions, 8075 flow. Second operand 9 states and 248 transitions. [2024-06-27 18:55:13,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 604 transitions, 10018 flow [2024-06-27 18:55:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 604 transitions, 9870 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 18:55:14,030 INFO L231 Difference]: Finished difference. Result has 227 places, 505 transitions, 8498 flow [2024-06-27 18:55:14,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7927, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8498, PETRI_PLACES=227, PETRI_TRANSITIONS=505} [2024-06-27 18:55:14,042 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 173 predicate places. [2024-06-27 18:55:14,043 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 505 transitions, 8498 flow [2024-06-27 18:55:14,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:55:14,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:14,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:55:14,044 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:14,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 966648144, now seen corresponding path program 3 times [2024-06-27 18:55:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786188897] [2024-06-27 18:55:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786188897] [2024-06-27 18:55:17,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786188897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:17,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:17,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620597674] [2024-06-27 18:55:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:17,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:55:17,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 505 transitions, 8498 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:55:17,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:17,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:55:17,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:21,161 INFO L124 PetriNetUnfolderBase]: 9087/13965 cut-off events. [2024-06-27 18:55:21,161 INFO L125 PetriNetUnfolderBase]: For 406656/407828 co-relation queries the response was YES. [2024-06-27 18:55:21,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113343 conditions, 13965 events. 9087/13965 cut-off events. For 406656/407828 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 88492 event pairs, 1839 based on Foata normal form. 162/13581 useless extension candidates. Maximal degree in co-relation 113231. Up to 11828 conditions per place. [2024-06-27 18:55:21,367 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 487 selfloop transitions, 74 changer transitions 0/610 dead transitions. [2024-06-27 18:55:21,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 610 transitions, 10398 flow [2024-06-27 18:55:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:55:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:55:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:55:21,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-27 18:55:21,393 INFO L175 Difference]: Start difference. First operand has 227 places, 505 transitions, 8498 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:55:21,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 610 transitions, 10398 flow [2024-06-27 18:55:22,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 610 transitions, 9887 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:55:22,713 INFO L231 Difference]: Finished difference. Result has 231 places, 529 transitions, 8541 flow [2024-06-27 18:55:22,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7987, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8541, PETRI_PLACES=231, PETRI_TRANSITIONS=529} [2024-06-27 18:55:22,714 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 177 predicate places. [2024-06-27 18:55:22,714 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 529 transitions, 8541 flow [2024-06-27 18:55:22,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:55:22,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:22,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:55:22,715 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:22,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1081944088, now seen corresponding path program 2 times [2024-06-27 18:55:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:22,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938040110] [2024-06-27 18:55:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:25,465 INFO 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 18:55:25,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:25,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938040110] [2024-06-27 18:55:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938040110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315205397] [2024-06-27 18:55:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:25,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:55:25,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 529 transitions, 8541 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 18:55:25,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:25,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:55:25,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:30,193 INFO L124 PetriNetUnfolderBase]: 9741/14891 cut-off events. [2024-06-27 18:55:30,193 INFO L125 PetriNetUnfolderBase]: For 395632/395657 co-relation queries the response was YES. [2024-06-27 18:55:30,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117897 conditions, 14891 events. 9741/14891 cut-off events. For 395632/395657 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 93460 event pairs, 2389 based on Foata normal form. 28/14549 useless extension candidates. Maximal degree in co-relation 117782. Up to 13187 conditions per place. [2024-06-27 18:55:30,361 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 552 selfloop transitions, 109 changer transitions 0/667 dead transitions. [2024-06-27 18:55:30,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 667 transitions, 11396 flow [2024-06-27 18:55:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:55:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:55:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-27 18:55:30,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-27 18:55:30,362 INFO L175 Difference]: Start difference. First operand has 231 places, 529 transitions, 8541 flow. Second operand 10 states and 242 transitions. [2024-06-27 18:55:30,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 667 transitions, 11396 flow [2024-06-27 18:55:31,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 667 transitions, 11236 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 18:55:31,344 INFO L231 Difference]: Finished difference. Result has 239 places, 580 transitions, 9624 flow [2024-06-27 18:55:31,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8381, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9624, PETRI_PLACES=239, PETRI_TRANSITIONS=580} [2024-06-27 18:55:31,345 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 185 predicate places. [2024-06-27 18:55:31,345 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 580 transitions, 9624 flow [2024-06-27 18:55:31,345 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 18:55:31,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:31,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:31,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:55:31,346 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:31,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash 439395494, now seen corresponding path program 1 times [2024-06-27 18:55:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988498913] [2024-06-27 18:55:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:31,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:34,584 INFO 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 18:55:34,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:34,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988498913] [2024-06-27 18:55:34,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988498913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:34,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:34,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937609166] [2024-06-27 18:55:34,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:34,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:55:34,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 580 transitions, 9624 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 18:55:34,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:34,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:55:34,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:39,091 INFO L124 PetriNetUnfolderBase]: 9791/15034 cut-off events. [2024-06-27 18:55:39,091 INFO L125 PetriNetUnfolderBase]: For 417260/417285 co-relation queries the response was YES. [2024-06-27 18:55:39,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120274 conditions, 15034 events. 9791/15034 cut-off events. For 417260/417285 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 95012 event pairs, 2397 based on Foata normal form. 26/14667 useless extension candidates. Maximal degree in co-relation 120155. Up to 13440 conditions per place. [2024-06-27 18:55:39,315 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 573 selfloop transitions, 75 changer transitions 0/654 dead transitions. [2024-06-27 18:55:39,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 654 transitions, 11359 flow [2024-06-27 18:55:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:55:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:55:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:55:39,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 18:55:39,317 INFO L175 Difference]: Start difference. First operand has 239 places, 580 transitions, 9624 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:55:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 654 transitions, 11359 flow [2024-06-27 18:55:40,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 654 transitions, 11116 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-27 18:55:40,667 INFO L231 Difference]: Finished difference. Result has 242 places, 582 transitions, 9580 flow [2024-06-27 18:55:40,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9387, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9580, PETRI_PLACES=242, PETRI_TRANSITIONS=582} [2024-06-27 18:55:40,668 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2024-06-27 18:55:40,668 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 582 transitions, 9580 flow [2024-06-27 18:55:40,669 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 18:55:40,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:40,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:40,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:55:40,669 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:40,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash 439388550, now seen corresponding path program 3 times [2024-06-27 18:55:40,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:40,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471502660] [2024-06-27 18:55:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:40,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:43,774 INFO 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 18:55:43,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:43,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471502660] [2024-06-27 18:55:43,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471502660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:43,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:43,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:43,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43557648] [2024-06-27 18:55:43,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:43,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:43,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:43,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:55:43,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 582 transitions, 9580 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 18:55:43,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:43,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:55:43,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:48,268 INFO L124 PetriNetUnfolderBase]: 9874/15125 cut-off events. [2024-06-27 18:55:48,268 INFO L125 PetriNetUnfolderBase]: For 426761/426786 co-relation queries the response was YES. [2024-06-27 18:55:48,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121772 conditions, 15125 events. 9874/15125 cut-off events. For 426761/426786 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 95223 event pairs, 2400 based on Foata normal form. 28/14768 useless extension candidates. Maximal degree in co-relation 121652. Up to 13439 conditions per place. [2024-06-27 18:55:48,436 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 574 selfloop transitions, 97 changer transitions 0/677 dead transitions. [2024-06-27 18:55:48,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 677 transitions, 11639 flow [2024-06-27 18:55:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:55:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:55:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 18:55:48,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-27 18:55:48,438 INFO L175 Difference]: Start difference. First operand has 242 places, 582 transitions, 9580 flow. Second operand 9 states and 221 transitions. [2024-06-27 18:55:48,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 677 transitions, 11639 flow [2024-06-27 18:55:49,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 677 transitions, 11408 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 18:55:49,759 INFO L231 Difference]: Finished difference. Result has 247 places, 593 transitions, 9843 flow [2024-06-27 18:55:49,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9355, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9843, PETRI_PLACES=247, PETRI_TRANSITIONS=593} [2024-06-27 18:55:49,759 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 193 predicate places. [2024-06-27 18:55:49,759 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 593 transitions, 9843 flow [2024-06-27 18:55:49,760 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 18:55:49,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:49,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:49,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:55:49,760 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:49,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash 439210796, now seen corresponding path program 4 times [2024-06-27 18:55:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:49,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131856779] [2024-06-27 18:55:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131856779] [2024-06-27 18:55:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131856779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:52,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:55:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5561423] [2024-06-27 18:55:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:55:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:55:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:55:53,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-06-27 18:55:53,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 593 transitions, 9843 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:55:53,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:53,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-06-27 18:55:53,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:57,483 INFO L124 PetriNetUnfolderBase]: 9771/15022 cut-off events. [2024-06-27 18:55:57,483 INFO L125 PetriNetUnfolderBase]: For 486973/487885 co-relation queries the response was YES. [2024-06-27 18:55:57,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124531 conditions, 15022 events. 9771/15022 cut-off events. For 486973/487885 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 96153 event pairs, 2134 based on Foata normal form. 180/14640 useless extension candidates. Maximal degree in co-relation 124409. Up to 12698 conditions per place. [2024-06-27 18:55:57,700 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 504 selfloop transitions, 104 changer transitions 0/674 dead transitions. [2024-06-27 18:55:57,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 674 transitions, 11624 flow [2024-06-27 18:55:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:55:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:55:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:55:57,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 18:55:57,702 INFO L175 Difference]: Start difference. First operand has 247 places, 593 transitions, 9843 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:55:57,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 674 transitions, 11624 flow [2024-06-27 18:55:59,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 674 transitions, 11359 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 18:55:59,580 INFO L231 Difference]: Finished difference. Result has 250 places, 596 transitions, 9884 flow [2024-06-27 18:55:59,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9578, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9884, PETRI_PLACES=250, PETRI_TRANSITIONS=596} [2024-06-27 18:55:59,581 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-06-27 18:55:59,581 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 596 transitions, 9884 flow [2024-06-27 18:55:59,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 18:55:59,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:59,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:55:59,582 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:55:59,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash 439210920, now seen corresponding path program 4 times [2024-06-27 18:55:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:59,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522492831] [2024-06-27 18:55:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:59,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:01,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:01,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522492831] [2024-06-27 18:56:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522492831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:01,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:01,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:56:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454898902] [2024-06-27 18:56:01,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:01,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:56:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:56:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:56:01,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:56:01,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 596 transitions, 9884 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 18:56:01,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:01,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:56:01,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:06,840 INFO L124 PetriNetUnfolderBase]: 10222/15548 cut-off events. [2024-06-27 18:56:06,841 INFO L125 PetriNetUnfolderBase]: For 471779/471804 co-relation queries the response was YES. [2024-06-27 18:56:06,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127614 conditions, 15548 events. 10222/15548 cut-off events. For 471779/471804 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97400 event pairs, 2490 based on Foata normal form. 26/15217 useless extension candidates. Maximal degree in co-relation 127491. Up to 13869 conditions per place. [2024-06-27 18:56:07,042 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 569 selfloop transitions, 113 changer transitions 0/688 dead transitions. [2024-06-27 18:56:07,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 688 transitions, 11921 flow [2024-06-27 18:56:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:56:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:56:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 18:56:07,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47708333333333336 [2024-06-27 18:56:07,045 INFO L175 Difference]: Start difference. First operand has 250 places, 596 transitions, 9884 flow. Second operand 10 states and 229 transitions. [2024-06-27 18:56:07,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 688 transitions, 11921 flow [2024-06-27 18:56:08,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 688 transitions, 11694 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 18:56:08,576 INFO L231 Difference]: Finished difference. Result has 256 places, 621 transitions, 10389 flow [2024-06-27 18:56:08,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9662, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10389, PETRI_PLACES=256, PETRI_TRANSITIONS=621} [2024-06-27 18:56:08,577 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 202 predicate places. [2024-06-27 18:56:08,577 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 621 transitions, 10389 flow [2024-06-27 18:56:08,578 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 18:56:08,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:08,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:08,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:56:08,578 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:56:08,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1811190340, now seen corresponding path program 2 times [2024-06-27 18:56:08,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:08,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398366843] [2024-06-27 18:56:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:08,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:11,733 INFO 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 18:56:11,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:11,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398366843] [2024-06-27 18:56:11,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398366843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:11,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:11,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:56:11,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19005313] [2024-06-27 18:56:11,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:11,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:56:11,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:56:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:56:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:56:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 621 transitions, 10389 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 18:56:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:56:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:17,150 INFO L124 PetriNetUnfolderBase]: 10272/15707 cut-off events. [2024-06-27 18:56:17,151 INFO L125 PetriNetUnfolderBase]: For 483033/483093 co-relation queries the response was YES. [2024-06-27 18:56:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128635 conditions, 15707 events. 10272/15707 cut-off events. For 483033/483093 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 99236 event pairs, 2472 based on Foata normal form. 44/15364 useless extension candidates. Maximal degree in co-relation 128508. Up to 14136 conditions per place. [2024-06-27 18:56:17,368 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 607 selfloop transitions, 78 changer transitions 0/691 dead transitions. [2024-06-27 18:56:17,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 691 transitions, 12176 flow [2024-06-27 18:56:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:56:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:56:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 18:56:17,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 18:56:17,369 INFO L175 Difference]: Start difference. First operand has 256 places, 621 transitions, 10389 flow. Second operand 8 states and 190 transitions. [2024-06-27 18:56:17,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 691 transitions, 12176 flow [2024-06-27 18:56:18,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 691 transitions, 11975 flow, removed 85 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:18,928 INFO L231 Difference]: Finished difference. Result has 262 places, 623 transitions, 10390 flow [2024-06-27 18:56:18,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10188, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10390, PETRI_PLACES=262, PETRI_TRANSITIONS=623} [2024-06-27 18:56:18,929 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 208 predicate places. [2024-06-27 18:56:18,929 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 623 transitions, 10390 flow [2024-06-27 18:56:18,929 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 18:56:18,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:18,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:56:18,930 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:56:18,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1721615450, now seen corresponding path program 1 times [2024-06-27 18:56:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:18,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940929791] [2024-06-27 18:56:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:21,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940929791] [2024-06-27 18:56:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940929791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:21,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:56:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020431645] [2024-06-27 18:56:21,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:56:21,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:56:21,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:56:21,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-06-27 18:56:21,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 623 transitions, 10390 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 18:56:21,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:21,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-06-27 18:56:21,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand