./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe015_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/safe015_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:12:59,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:12:59,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:12:59,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:12:59,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:12:59,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:12:59,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:12:59,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:12:59,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:12:59,286 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:12:59,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:12:59,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:12:59,287 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:12:59,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:12:59,288 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:12:59,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:12:59,289 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:12:59,289 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:12:59,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:12:59,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:12:59,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:12:59,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:12:59,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:12:59,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:12:59,291 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:12:59,291 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:12:59,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:12:59,291 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:12:59,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:12:59,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:12:59,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:12:59,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:12:59,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:12:59,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:12:59,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:12:59,294 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:12:59,294 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:12:59,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:12:59,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:12:59,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:12:59,295 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:12:59,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:12:59,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:12:59,295 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:12:59,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:12:59,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:12:59,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:12:59,512 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:12:59,513 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:12:59,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_power.opt.yml/witness.yml [2024-06-27 21:12:59,681 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:12:59,681 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:12:59,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i [2024-06-27 21:13:00,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:13:00,858 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:13:00,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i [2024-06-27 21:13:00,885 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29415864f/ffb7baf7dbe64294befb880ddbf51a7c/FLAG45b9562ef [2024-06-27 21:13:00,895 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29415864f/ffb7baf7dbe64294befb880ddbf51a7c [2024-06-27 21:13:00,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:13:00,896 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:13:00,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:13:00,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:13:00,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:13:00,903 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:12:59" (1/2) ... [2024-06-27 21:13:00,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eeb8775 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:13:00, skipping insertion in model container [2024-06-27 21:13:00,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:12:59" (1/2) ... [2024-06-27 21:13:00,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@623a0fb0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:13:00, skipping insertion in model container [2024-06-27 21:13:00,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:13:00" (2/2) ... [2024-06-27 21:13:00,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eeb8775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:00, skipping insertion in model container [2024-06-27 21:13:00,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:13:00" (2/2) ... [2024-06-27 21:13:00,906 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:13:01,021 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:13:01,022 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 21:13:01,022 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 21:13:01,023 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 21:13:01,028 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:13:01,028 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 21:13:01,082 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:13:01,417 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:13:01,431 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:13:01,525 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:13:01,559 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:13:01,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01 WrapperNode [2024-06-27 21:13:01,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:13:01,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:13:01,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:13:01,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:13:01,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,597 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,629 INFO L138 Inliner]: procedures = 175, calls = 93, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2024-06-27 21:13:01,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:13:01,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:13:01,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:13:01,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:13:01,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,650 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,665 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 21:13:01,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:13:01,701 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:13:01,702 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:13:01,702 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:13:01,702 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (1/1) ... [2024-06-27 21:13:01,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:13:01,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:13:01,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:13:01,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:13:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:13:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:13:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:13:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:13:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:13:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:13:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:13:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:13:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:13:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:13:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:13:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:13:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:13:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:13:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:13:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:13:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:13:01,783 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:13:01,943 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:13:01,945 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:13:02,372 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:13:02,372 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:13:02,726 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:13:02,726 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:13:02,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:13:02 BoogieIcfgContainer [2024-06-27 21:13:02,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:13:02,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:13:02,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:13:02,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:13:02,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:12:59" (1/4) ... [2024-06-27 21:13:02,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ea5c57 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:13:02, skipping insertion in model container [2024-06-27 21:13:02,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:13:00" (2/4) ... [2024-06-27 21:13:02,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ea5c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:13:02, skipping insertion in model container [2024-06-27 21:13:02,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:01" (3/4) ... [2024-06-27 21:13:02,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ea5c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:13:02, skipping insertion in model container [2024-06-27 21:13:02,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:13:02" (4/4) ... [2024-06-27 21:13:02,736 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.opt.i [2024-06-27 21:13:02,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:13:02,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:13:02,750 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:13:02,809 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:13:02,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:13:02,867 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 21:13:02,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:13:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:13:02,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:13:02,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 21:13:02,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:13:02,895 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;@6adb69bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:13:02,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:13:02,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:13:02,899 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:13:02,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:13:02,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:02,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:13:02,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:02,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash 888392606, now seen corresponding path program 1 times [2024-06-27 21:13:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:02,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30484338] [2024-06-27 21:13:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:04,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30484338] [2024-06-27 21:13:04,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30484338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:04,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:04,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:13:04,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204781073] [2024-06-27 21:13:04,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:04,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:13:04,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:13:04,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:13:04,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:13:04,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:04,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:04,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:13:04,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:05,039 INFO L124 PetriNetUnfolderBase]: 1412/2149 cut-off events. [2024-06-27 21:13:05,039 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:13:05,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2149 events. 1412/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10203 event pairs, 956 based on Foata normal form. 1/2115 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-27 21:13:05,052 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 21:13:05,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-27 21:13:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:13:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:13:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-27 21:13:05,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-27 21:13:05,062 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-27 21:13:05,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-27 21:13:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:05,066 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 21:13:05,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 21:13:05,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 21:13:05,069 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 21:13:05,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:05,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:05,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:13:05,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:05,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -952094093, now seen corresponding path program 1 times [2024-06-27 21:13:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:05,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616395948] [2024-06-27 21:13:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:06,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:06,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616395948] [2024-06-27 21:13:06,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616395948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:06,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:06,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:13:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667949371] [2024-06-27 21:13:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:13:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:13:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:13:06,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:13:06,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:06,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:06,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:13:06,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:06,930 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-27 21:13:06,930 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-27 21:13:06,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10154 event pairs, 654 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-27 21:13:06,941 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 21:13:06,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-27 21:13:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:13:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:13:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 21:13:06,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-27 21:13:06,943 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-27 21:13:06,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-27 21:13:06,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:13:06,945 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 21:13:06,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 21:13:06,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 21:13:06,947 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 21:13:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:06,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:06,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:13:06,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:06,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash -261872783, now seen corresponding path program 1 times [2024-06-27 21:13:06,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:06,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366801048] [2024-06-27 21:13:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:09,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366801048] [2024-06-27 21:13:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366801048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:09,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:09,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:09,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682919745] [2024-06-27 21:13:09,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:09,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:09,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:09,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:09,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:09,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:13:09,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:09,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:09,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:13:09,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:10,168 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-27 21:13:10,168 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-27 21:13:10,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10059 event pairs, 485 based on Foata normal form. 6/2121 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-27 21:13:10,176 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 21:13:10,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-27 21:13:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 21:13:10,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 21:13:10,182 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-27 21:13:10,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-27 21:13:10,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:10,185 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-27 21:13:10,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 21:13:10,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-27 21:13:10,187 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-27 21:13:10,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:10,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:10,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:10,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:13:10,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash -448304984, now seen corresponding path program 1 times [2024-06-27 21:13:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:10,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636540970] [2024-06-27 21:13:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636540970] [2024-06-27 21:13:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636540970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:11,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:11,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:11,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249764921] [2024-06-27 21:13:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:11,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:11,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:11,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:11,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:11,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:11,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:12,314 INFO L124 PetriNetUnfolderBase]: 1386/2110 cut-off events. [2024-06-27 21:13:12,315 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2024-06-27 21:13:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 2110 events. 1386/2110 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10003 event pairs, 572 based on Foata normal form. 2/2110 useless extension candidates. Maximal degree in co-relation 5879. Up to 2036 conditions per place. [2024-06-27 21:13:12,325 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-27 21:13:12,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 387 flow [2024-06-27 21:13:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:13:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:13:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 21:13:12,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 21:13:12,327 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-27 21:13:12,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 387 flow [2024-06-27 21:13:12,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 360 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:12,331 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 230 flow [2024-06-27 21:13:12,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 21:13:12,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-27 21:13:12,332 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 230 flow [2024-06-27 21:13:12,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:12,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:12,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:12,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:13:12,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:12,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash -991279510, now seen corresponding path program 1 times [2024-06-27 21:13:12,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:12,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401795446] [2024-06-27 21:13:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:12,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401795446] [2024-06-27 21:13:13,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401795446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:13,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:13,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:13,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434846088] [2024-06-27 21:13:13,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:13,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:13,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:13,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:13,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:13,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:13,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:13,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:13,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:14,423 INFO L124 PetriNetUnfolderBase]: 1376/2096 cut-off events. [2024-06-27 21:13:14,424 INFO L125 PetriNetUnfolderBase]: For 3355/3357 co-relation queries the response was YES. [2024-06-27 21:13:14,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6455 conditions, 2096 events. 1376/2096 cut-off events. For 3355/3357 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9923 event pairs, 566 based on Foata normal form. 6/2101 useless extension candidates. Maximal degree in co-relation 6435. Up to 2028 conditions per place. [2024-06-27 21:13:14,436 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 21:13:14,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 386 flow [2024-06-27 21:13:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:13:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:13:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 21:13:14,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 21:13:14,440 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 230 flow. Second operand 5 states and 92 transitions. [2024-06-27 21:13:14,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 386 flow [2024-06-27 21:13:14,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 372 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 21:13:14,444 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 244 flow [2024-06-27 21:13:14,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-27 21:13:14,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 21:13:14,445 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 244 flow [2024-06-27 21:13:14,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:14,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:14,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:13:14,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:14,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash -616949993, now seen corresponding path program 1 times [2024-06-27 21:13:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605006290] [2024-06-27 21:13:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:16,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:16,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605006290] [2024-06-27 21:13:16,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605006290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:16,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:16,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:16,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366324990] [2024-06-27 21:13:16,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:16,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:16,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:16,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:16,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:16,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:17,211 INFO L124 PetriNetUnfolderBase]: 1389/2122 cut-off events. [2024-06-27 21:13:17,212 INFO L125 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2024-06-27 21:13:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6769 conditions, 2122 events. 1389/2122 cut-off events. For 4396/4396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10146 event pairs, 523 based on Foata normal form. 2/2122 useless extension candidates. Maximal degree in co-relation 6746. Up to 1956 conditions per place. [2024-06-27 21:13:17,226 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-27 21:13:17,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 526 flow [2024-06-27 21:13:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 21:13:17,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 21:13:17,228 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 244 flow. Second operand 6 states and 118 transitions. [2024-06-27 21:13:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 526 flow [2024-06-27 21:13:17,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 512 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:17,232 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2024-06-27 21:13:17,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-06-27 21:13:17,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-27 21:13:17,235 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2024-06-27 21:13:17,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:17,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:17,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:17,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:13:17,236 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:17,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash -665621239, now seen corresponding path program 2 times [2024-06-27 21:13:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140709042] [2024-06-27 21:13:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:18,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:18,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140709042] [2024-06-27 21:13:18,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140709042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:18,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:18,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389734710] [2024-06-27 21:13:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:18,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:18,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:18,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:18,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:18,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:19,846 INFO L124 PetriNetUnfolderBase]: 1384/2108 cut-off events. [2024-06-27 21:13:19,846 INFO L125 PetriNetUnfolderBase]: For 6466/6466 co-relation queries the response was YES. [2024-06-27 21:13:19,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7416 conditions, 2108 events. 1384/2108 cut-off events. For 6466/6466 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10054 event pairs, 537 based on Foata normal form. 2/2105 useless extension candidates. Maximal degree in co-relation 7390. Up to 1953 conditions per place. [2024-06-27 21:13:19,860 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-27 21:13:19,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 582 flow [2024-06-27 21:13:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 21:13:19,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 21:13:19,872 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 6 states and 112 transitions. [2024-06-27 21:13:19,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 582 flow [2024-06-27 21:13:19,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 552 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:19,889 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 376 flow [2024-06-27 21:13:19,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-27 21:13:19,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-27 21:13:19,891 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 376 flow [2024-06-27 21:13:19,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:19,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:19,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:19,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:13:19,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:19,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1407728023, now seen corresponding path program 1 times [2024-06-27 21:13:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:19,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471401302] [2024-06-27 21:13:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:21,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:21,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471401302] [2024-06-27 21:13:21,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471401302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:21,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:21,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:21,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069034409] [2024-06-27 21:13:21,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:21,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:21,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:21,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:21,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:21,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:21,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:21,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:21,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:22,081 INFO L124 PetriNetUnfolderBase]: 1471/2248 cut-off events. [2024-06-27 21:13:22,081 INFO L125 PetriNetUnfolderBase]: For 8387/8389 co-relation queries the response was YES. [2024-06-27 21:13:22,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 2248 events. 1471/2248 cut-off events. For 8387/8389 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10759 event pairs, 524 based on Foata normal form. 6/2252 useless extension candidates. Maximal degree in co-relation 8311. Up to 2020 conditions per place. [2024-06-27 21:13:22,095 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-27 21:13:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 862 flow [2024-06-27 21:13:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:13:22,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 21:13:22,099 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 376 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:13:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 862 flow [2024-06-27 21:13:22,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 798 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:22,109 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 562 flow [2024-06-27 21:13:22,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 21:13:22,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-27 21:13:22,112 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 562 flow [2024-06-27 21:13:22,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:22,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:22,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:22,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:13:22,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:22,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:22,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1689713947, now seen corresponding path program 2 times [2024-06-27 21:13:22,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:22,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573931008] [2024-06-27 21:13:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:22,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:23,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:23,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573931008] [2024-06-27 21:13:23,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573931008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:23,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:23,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:23,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105345711] [2024-06-27 21:13:23,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:23,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:23,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:23,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:23,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:23,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:24,693 INFO L124 PetriNetUnfolderBase]: 1515/2326 cut-off events. [2024-06-27 21:13:24,693 INFO L125 PetriNetUnfolderBase]: For 10862/10866 co-relation queries the response was YES. [2024-06-27 21:13:24,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9058 conditions, 2326 events. 1515/2326 cut-off events. For 10862/10866 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11220 event pairs, 531 based on Foata normal form. 10/2334 useless extension candidates. Maximal degree in co-relation 9026. Up to 2058 conditions per place. [2024-06-27 21:13:24,709 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 40 changer transitions 0/109 dead transitions. [2024-06-27 21:13:24,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-27 21:13:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 21:13:24,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 21:13:24,712 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 562 flow. Second operand 6 states and 119 transitions. [2024-06-27 21:13:24,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-27 21:13:24,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 900 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:24,724 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 679 flow [2024-06-27 21:13:24,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 21:13:24,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 21:13:24,725 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 679 flow [2024-06-27 21:13:24,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:24,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:24,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:24,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:13:24,726 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:24,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:24,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1281327813, now seen corresponding path program 3 times [2024-06-27 21:13:24,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:24,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252478683] [2024-06-27 21:13:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:24,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:26,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252478683] [2024-06-27 21:13:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252478683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:26,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:26,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:26,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882569124] [2024-06-27 21:13:26,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:26,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:26,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:26,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:26,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:26,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:26,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:27,315 INFO L124 PetriNetUnfolderBase]: 1499/2298 cut-off events. [2024-06-27 21:13:27,315 INFO L125 PetriNetUnfolderBase]: For 12900/12912 co-relation queries the response was YES. [2024-06-27 21:13:27,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9165 conditions, 2298 events. 1499/2298 cut-off events. For 12900/12912 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11027 event pairs, 536 based on Foata normal form. 18/2312 useless extension candidates. Maximal degree in co-relation 9132. Up to 2045 conditions per place. [2024-06-27 21:13:27,328 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-27 21:13:27,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 941 flow [2024-06-27 21:13:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:13:27,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:13:27,330 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 679 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:13:27,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 941 flow [2024-06-27 21:13:27,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:27,339 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 693 flow [2024-06-27 21:13:27,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=693, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-27 21:13:27,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 21:13:27,340 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 693 flow [2024-06-27 21:13:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:27,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:27,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:13:27,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:27,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 840857047, now seen corresponding path program 1 times [2024-06-27 21:13:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179320347] [2024-06-27 21:13:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:29,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:29,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179320347] [2024-06-27 21:13:29,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179320347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:29,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:29,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:29,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158798929] [2024-06-27 21:13:29,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:29,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:29,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:29,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:29,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:29,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 693 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:29,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:29,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:29,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:30,574 INFO L124 PetriNetUnfolderBase]: 1491/2291 cut-off events. [2024-06-27 21:13:30,575 INFO L125 PetriNetUnfolderBase]: For 12881/12883 co-relation queries the response was YES. [2024-06-27 21:13:30,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 2291 events. 1491/2291 cut-off events. For 12881/12883 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11023 event pairs, 525 based on Foata normal form. 6/2296 useless extension candidates. Maximal degree in co-relation 9055. Up to 2175 conditions per place. [2024-06-27 21:13:30,588 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 87 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-27 21:13:30,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 967 flow [2024-06-27 21:13:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:13:30,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:13:30,590 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 693 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:13:30,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 967 flow [2024-06-27 21:13:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 798 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:13:30,624 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 577 flow [2024-06-27 21:13:30,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-27 21:13:30,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 21:13:30,625 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 577 flow [2024-06-27 21:13:30,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:30,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:30,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:30,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:13:30,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:30,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 836758438, now seen corresponding path program 1 times [2024-06-27 21:13:30,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:30,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262374259] [2024-06-27 21:13:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:32,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:32,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262374259] [2024-06-27 21:13:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262374259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:32,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:32,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:32,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744611189] [2024-06-27 21:13:32,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:32,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:32,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:32,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:32,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:32,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:33,951 INFO L124 PetriNetUnfolderBase]: 1540/2372 cut-off events. [2024-06-27 21:13:33,951 INFO L125 PetriNetUnfolderBase]: For 13309/13309 co-relation queries the response was YES. [2024-06-27 21:13:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9447 conditions, 2372 events. 1540/2372 cut-off events. For 13309/13309 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11511 event pairs, 525 based on Foata normal form. 2/2373 useless extension candidates. Maximal degree in co-relation 9415. Up to 2209 conditions per place. [2024-06-27 21:13:33,964 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-27 21:13:33,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1029 flow [2024-06-27 21:13:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:13:33,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:13:33,966 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 577 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:13:33,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1029 flow [2024-06-27 21:13:33,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 994 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:33,977 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 650 flow [2024-06-27 21:13:33,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-27 21:13:33,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 21:13:33,978 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 650 flow [2024-06-27 21:13:33,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:33,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:33,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:33,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:13:33,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:33,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 841520038, now seen corresponding path program 2 times [2024-06-27 21:13:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770081538] [2024-06-27 21:13:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:33,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770081538] [2024-06-27 21:13:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770081538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:36,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:36,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631236108] [2024-06-27 21:13:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:36,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:36,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:36,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:36,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:36,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:36,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:37,325 INFO L124 PetriNetUnfolderBase]: 1553/2399 cut-off events. [2024-06-27 21:13:37,326 INFO L125 PetriNetUnfolderBase]: For 16576/16576 co-relation queries the response was YES. [2024-06-27 21:13:37,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 2399 events. 1553/2399 cut-off events. For 16576/16576 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11750 event pairs, 485 based on Foata normal form. 2/2399 useless extension candidates. Maximal degree in co-relation 10137. Up to 1935 conditions per place. [2024-06-27 21:13:37,337 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-27 21:13:37,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1108 flow [2024-06-27 21:13:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:13:37,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 21:13:37,339 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 650 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:13:37,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1108 flow [2024-06-27 21:13:37,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1049 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:37,356 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 791 flow [2024-06-27 21:13:37,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-27 21:13:37,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-27 21:13:37,357 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 791 flow [2024-06-27 21:13:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:37,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:37,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:13:37,357 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:37,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 288178184, now seen corresponding path program 3 times [2024-06-27 21:13:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:37,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373563561] [2024-06-27 21:13:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:39,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373563561] [2024-06-27 21:13:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373563561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:39,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:39,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23979737] [2024-06-27 21:13:39,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:39,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:39,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:39,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:39,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:39,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:40,525 INFO L124 PetriNetUnfolderBase]: 1548/2368 cut-off events. [2024-06-27 21:13:40,527 INFO L125 PetriNetUnfolderBase]: For 20169/20169 co-relation queries the response was YES. [2024-06-27 21:13:40,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2368 events. 1548/2368 cut-off events. For 20169/20169 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11528 event pairs, 536 based on Foata normal form. 2/2357 useless extension candidates. Maximal degree in co-relation 10898. Up to 1932 conditions per place. [2024-06-27 21:13:40,564 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-27 21:13:40,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1203 flow [2024-06-27 21:13:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:13:40,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:13:40,566 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 791 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:13:40,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1203 flow [2024-06-27 21:13:40,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:40,595 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 881 flow [2024-06-27 21:13:40,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-27 21:13:40,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 21:13:40,596 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 881 flow [2024-06-27 21:13:40,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:40,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:40,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:40,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:13:40,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:40,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1459900026, now seen corresponding path program 1 times [2024-06-27 21:13:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:40,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107970205] [2024-06-27 21:13:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:42,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:42,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107970205] [2024-06-27 21:13:42,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107970205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:42,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:42,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:42,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156105861] [2024-06-27 21:13:42,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:42,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:42,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:42,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:42,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:42,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:42,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:42,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:42,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:43,217 INFO L124 PetriNetUnfolderBase]: 1545/2395 cut-off events. [2024-06-27 21:13:43,217 INFO L125 PetriNetUnfolderBase]: For 21591/21591 co-relation queries the response was YES. [2024-06-27 21:13:43,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11070 conditions, 2395 events. 1545/2395 cut-off events. For 21591/21591 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11753 event pairs, 534 based on Foata normal form. 1/2395 useless extension candidates. Maximal degree in co-relation 11033. Up to 2306 conditions per place. [2024-06-27 21:13:43,230 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-27 21:13:43,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1139 flow [2024-06-27 21:13:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:13:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:13:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:13:43,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:13:43,245 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 881 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:13:43,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1139 flow [2024-06-27 21:13:43,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 1053 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:43,263 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 841 flow [2024-06-27 21:13:43,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-27 21:13:43,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 21:13:43,263 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 841 flow [2024-06-27 21:13:43,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:43,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:43,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:43,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:13:43,264 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:43,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash 169709948, now seen corresponding path program 1 times [2024-06-27 21:13:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:43,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89062133] [2024-06-27 21:13:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:45,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:45,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89062133] [2024-06-27 21:13:45,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89062133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:45,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:45,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:45,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16615019] [2024-06-27 21:13:45,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:45,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:45,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:45,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:45,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:45,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:45,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:45,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:45,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:46,659 INFO L124 PetriNetUnfolderBase]: 1535/2378 cut-off events. [2024-06-27 21:13:46,659 INFO L125 PetriNetUnfolderBase]: For 23613/23613 co-relation queries the response was YES. [2024-06-27 21:13:46,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11134 conditions, 2378 events. 1535/2378 cut-off events. For 23613/23613 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11692 event pairs, 522 based on Foata normal form. 4/2381 useless extension candidates. Maximal degree in co-relation 11095. Up to 2209 conditions per place. [2024-06-27 21:13:46,672 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-27 21:13:46,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1219 flow [2024-06-27 21:13:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:13:46,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:13:46,675 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 841 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:13:46,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1219 flow [2024-06-27 21:13:46,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1185 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:46,694 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 853 flow [2024-06-27 21:13:46,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-27 21:13:46,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 21:13:46,695 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 853 flow [2024-06-27 21:13:46,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:46,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:46,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:46,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:13:46,696 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:46,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1426981192, now seen corresponding path program 2 times [2024-06-27 21:13:46,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:46,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888225223] [2024-06-27 21:13:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:48,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:48,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888225223] [2024-06-27 21:13:48,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888225223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:48,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:48,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:48,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695703572] [2024-06-27 21:13:48,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:48,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:48,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:48,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:48,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:48,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:48,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:48,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:48,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:49,904 INFO L124 PetriNetUnfolderBase]: 1597/2483 cut-off events. [2024-06-27 21:13:49,904 INFO L125 PetriNetUnfolderBase]: For 27319/27323 co-relation queries the response was YES. [2024-06-27 21:13:49,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 2483 events. 1597/2483 cut-off events. For 27319/27323 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12372 event pairs, 474 based on Foata normal form. 8/2489 useless extension candidates. Maximal degree in co-relation 11855. Up to 1972 conditions per place. [2024-06-27 21:13:49,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 55 changer transitions 0/144 dead transitions. [2024-06-27 21:13:49,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1425 flow [2024-06-27 21:13:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 21:13:49,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:13:49,919 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 853 flow. Second operand 7 states and 140 transitions. [2024-06-27 21:13:49,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1425 flow [2024-06-27 21:13:49,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:49,934 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1011 flow [2024-06-27 21:13:49,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-27 21:13:49,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 21:13:49,935 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1011 flow [2024-06-27 21:13:49,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:49,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:13:49,935 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:49,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 759468112, now seen corresponding path program 3 times [2024-06-27 21:13:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148674] [2024-06-27 21:13:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:52,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:52,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148674] [2024-06-27 21:13:52,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377044953] [2024-06-27 21:13:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:52,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:52,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:52,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:52,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:52,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:52,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:53,554 INFO L124 PetriNetUnfolderBase]: 1623/2514 cut-off events. [2024-06-27 21:13:53,554 INFO L125 PetriNetUnfolderBase]: For 31361/31361 co-relation queries the response was YES. [2024-06-27 21:13:53,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2514 events. 1623/2514 cut-off events. For 31361/31361 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12466 event pairs, 483 based on Foata normal form. 4/2516 useless extension candidates. Maximal degree in co-relation 12469. Up to 1994 conditions per place. [2024-06-27 21:13:53,569 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-27 21:13:53,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1515 flow [2024-06-27 21:13:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:13:53,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 21:13:53,572 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1011 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:13:53,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1515 flow [2024-06-27 21:13:53,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1439 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:53,593 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 1099 flow [2024-06-27 21:13:53,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-27 21:13:53,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 21:13:53,594 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 1099 flow [2024-06-27 21:13:53,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:53,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:53,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:53,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:13:53,595 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:53,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1390049878, now seen corresponding path program 1 times [2024-06-27 21:13:53,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:53,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738589819] [2024-06-27 21:13:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:53,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:55,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:55,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738589819] [2024-06-27 21:13:55,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738589819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:55,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:55,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713846124] [2024-06-27 21:13:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:55,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:55,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:55,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:55,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:55,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:55,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:56,894 INFO L124 PetriNetUnfolderBase]: 1643/2553 cut-off events. [2024-06-27 21:13:56,895 INFO L125 PetriNetUnfolderBase]: For 35304/35308 co-relation queries the response was YES. [2024-06-27 21:13:56,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12849 conditions, 2553 events. 1643/2553 cut-off events. For 35304/35308 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12704 event pairs, 485 based on Foata normal form. 8/2559 useless extension candidates. Maximal degree in co-relation 12807. Up to 2226 conditions per place. [2024-06-27 21:13:56,907 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 42 changer transitions 0/144 dead transitions. [2024-06-27 21:13:56,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1487 flow [2024-06-27 21:13:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:13:56,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:13:56,909 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 1099 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:13:56,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1487 flow [2024-06-27 21:13:56,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1355 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:56,933 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1084 flow [2024-06-27 21:13:56,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-27 21:13:56,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 21:13:56,934 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1084 flow [2024-06-27 21:13:56,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:56,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:56,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:13:56,935 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:56,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash 600299158, now seen corresponding path program 4 times [2024-06-27 21:13:56,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118551096] [2024-06-27 21:13:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:56,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:58,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:58,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118551096] [2024-06-27 21:13:58,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118551096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:58,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728615824] [2024-06-27 21:13:58,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:58,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:58,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:58,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:58,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1084 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:58,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:58,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:58,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:00,115 INFO L124 PetriNetUnfolderBase]: 1633/2523 cut-off events. [2024-06-27 21:14:00,115 INFO L125 PetriNetUnfolderBase]: For 37835/37843 co-relation queries the response was YES. [2024-06-27 21:14:00,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12901 conditions, 2523 events. 1633/2523 cut-off events. For 37835/37843 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12553 event pairs, 507 based on Foata normal form. 12/2529 useless extension candidates. Maximal degree in co-relation 12858. Up to 2018 conditions per place. [2024-06-27 21:14:00,127 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 81 selfloop transitions, 56 changer transitions 0/142 dead transitions. [2024-06-27 21:14:00,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1514 flow [2024-06-27 21:14:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 21:14:00,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 21:14:00,129 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1084 flow. Second operand 7 states and 132 transitions. [2024-06-27 21:14:00,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1514 flow [2024-06-27 21:14:00,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1413 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:00,154 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1104 flow [2024-06-27 21:14:00,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1104, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-27 21:14:00,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-27 21:14:00,155 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1104 flow [2024-06-27 21:14:00,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:00,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:00,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:00,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:14:00,156 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:00,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 343591258, now seen corresponding path program 5 times [2024-06-27 21:14:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:00,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618967927] [2024-06-27 21:14:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:00,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:02,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:02,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618967927] [2024-06-27 21:14:02,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618967927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:02,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:02,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:02,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879689295] [2024-06-27 21:14:02,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:02,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:02,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:02,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:02,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:02,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:02,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1104 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:02,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:02,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:02,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:04,357 INFO L124 PetriNetUnfolderBase]: 1623/2493 cut-off events. [2024-06-27 21:14:04,357 INFO L125 PetriNetUnfolderBase]: For 40821/40821 co-relation queries the response was YES. [2024-06-27 21:14:04,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12977 conditions, 2493 events. 1623/2493 cut-off events. For 40821/40821 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12302 event pairs, 562 based on Foata normal form. 4/2484 useless extension candidates. Maximal degree in co-relation 12933. Up to 2010 conditions per place. [2024-06-27 21:14:04,371 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 59 changer transitions 0/144 dead transitions. [2024-06-27 21:14:04,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1476 flow [2024-06-27 21:14:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:14:04,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:14:04,374 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1104 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:14:04,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1476 flow [2024-06-27 21:14:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 144 transitions, 1272 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:04,401 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1026 flow [2024-06-27 21:14:04,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-27 21:14:04,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 21:14:04,402 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1026 flow [2024-06-27 21:14:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:04,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:04,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:04,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:14:04,402 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:04,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 597333864, now seen corresponding path program 2 times [2024-06-27 21:14:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:04,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822406805] [2024-06-27 21:14:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:06,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822406805] [2024-06-27 21:14:06,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822406805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:06,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:06,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:06,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005167356] [2024-06-27 21:14:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:06,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:06,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:06,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1026 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:06,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:06,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:06,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:07,568 INFO L124 PetriNetUnfolderBase]: 1643/2563 cut-off events. [2024-06-27 21:14:07,568 INFO L125 PetriNetUnfolderBase]: For 42583/42591 co-relation queries the response was YES. [2024-06-27 21:14:07,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13224 conditions, 2563 events. 1643/2563 cut-off events. For 42583/42591 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12857 event pairs, 496 based on Foata normal form. 12/2571 useless extension candidates. Maximal degree in co-relation 13180. Up to 2236 conditions per place. [2024-06-27 21:14:07,583 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 21:14:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1406 flow [2024-06-27 21:14:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:14:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:14:07,585 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1026 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:14:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1406 flow [2024-06-27 21:14:07,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1173 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 21:14:07,615 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 911 flow [2024-06-27 21:14:07,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-27 21:14:07,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 21:14:07,616 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 911 flow [2024-06-27 21:14:07,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:07,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:07,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:07,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:14:07,616 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:07,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 609830294, now seen corresponding path program 3 times [2024-06-27 21:14:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:07,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227428027] [2024-06-27 21:14:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:09,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227428027] [2024-06-27 21:14:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227428027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:09,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:09,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839882699] [2024-06-27 21:14:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:09,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:09,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:09,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:09,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:09,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:09,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:10,791 INFO L124 PetriNetUnfolderBase]: 1635/2545 cut-off events. [2024-06-27 21:14:10,791 INFO L125 PetriNetUnfolderBase]: For 44750/44758 co-relation queries the response was YES. [2024-06-27 21:14:10,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12991 conditions, 2545 events. 1635/2545 cut-off events. For 44750/44758 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12726 event pairs, 468 based on Foata normal form. 12/2553 useless extension candidates. Maximal degree in co-relation 12949. Up to 2142 conditions per place. [2024-06-27 21:14:10,805 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-27 21:14:10,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1297 flow [2024-06-27 21:14:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:14:10,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:14:10,807 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 911 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:14:10,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1297 flow [2024-06-27 21:14:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:10,834 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 944 flow [2024-06-27 21:14:10,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-27 21:14:10,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-27 21:14:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 944 flow [2024-06-27 21:14:10,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:10,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:10,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:10,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:14:10,836 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:10,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1951098552, now seen corresponding path program 1 times [2024-06-27 21:14:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903949039] [2024-06-27 21:14:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:12,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:12,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903949039] [2024-06-27 21:14:12,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903949039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:12,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:12,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994362325] [2024-06-27 21:14:12,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:12,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:12,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:12,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 944 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:12,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:12,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:12,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:13,740 INFO L124 PetriNetUnfolderBase]: 1657/2582 cut-off events. [2024-06-27 21:14:13,741 INFO L125 PetriNetUnfolderBase]: For 48675/48675 co-relation queries the response was YES. [2024-06-27 21:14:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13390 conditions, 2582 events. 1657/2582 cut-off events. For 48675/48675 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12874 event pairs, 529 based on Foata normal form. 6/2582 useless extension candidates. Maximal degree in co-relation 13347. Up to 2356 conditions per place. [2024-06-27 21:14:13,756 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-27 21:14:13,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 141 transitions, 1372 flow [2024-06-27 21:14:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:14:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 21:14:13,758 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 944 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:14:13,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 141 transitions, 1372 flow [2024-06-27 21:14:13,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1259 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:13,796 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 950 flow [2024-06-27 21:14:13,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=950, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2024-06-27 21:14:13,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 21:14:13,797 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 950 flow [2024-06-27 21:14:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:13,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:13,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:13,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:14:13,798 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:13,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1274210513, now seen corresponding path program 1 times [2024-06-27 21:14:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106686564] [2024-06-27 21:14:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:15,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:15,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106686564] [2024-06-27 21:14:15,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106686564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:15,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:15,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157148673] [2024-06-27 21:14:15,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:15,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:15,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:15,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 950 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:15,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:15,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:15,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:16,487 INFO L124 PetriNetUnfolderBase]: 1905/2990 cut-off events. [2024-06-27 21:14:16,487 INFO L125 PetriNetUnfolderBase]: For 59788/59788 co-relation queries the response was YES. [2024-06-27 21:14:16,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16049 conditions, 2990 events. 1905/2990 cut-off events. For 59788/59788 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15589 event pairs, 584 based on Foata normal form. 4/2993 useless extension candidates. Maximal degree in co-relation 16004. Up to 2445 conditions per place. [2024-06-27 21:14:16,502 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 166 selfloop transitions, 34 changer transitions 0/205 dead transitions. [2024-06-27 21:14:16,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 205 transitions, 1773 flow [2024-06-27 21:14:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 21:14:16,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:14:16,505 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 950 flow. Second operand 11 states and 209 transitions. [2024-06-27 21:14:16,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 205 transitions, 1773 flow [2024-06-27 21:14:16,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 205 transitions, 1737 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:14:16,555 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1159 flow [2024-06-27 21:14:16,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1159, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-27 21:14:16,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 21:14:16,556 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1159 flow [2024-06-27 21:14:16,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:16,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:16,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:14:16,557 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:16,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash 963181349, now seen corresponding path program 2 times [2024-06-27 21:14:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:16,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398384445] [2024-06-27 21:14:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:16,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:18,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:18,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398384445] [2024-06-27 21:14:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398384445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:18,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630092782] [2024-06-27 21:14:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:18,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:18,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:20,248 INFO L124 PetriNetUnfolderBase]: 2077/3270 cut-off events. [2024-06-27 21:14:20,248 INFO L125 PetriNetUnfolderBase]: For 75817/75817 co-relation queries the response was YES. [2024-06-27 21:14:20,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18668 conditions, 3270 events. 2077/3270 cut-off events. For 75817/75817 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17531 event pairs, 488 based on Foata normal form. 4/3273 useless extension candidates. Maximal degree in co-relation 18618. Up to 2411 conditions per place. [2024-06-27 21:14:20,270 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 36 changer transitions 0/194 dead transitions. [2024-06-27 21:14:20,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 194 transitions, 1881 flow [2024-06-27 21:14:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:14:20,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:14:20,276 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1159 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:14:20,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 194 transitions, 1881 flow [2024-06-27 21:14:20,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 1819 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 21:14:20,327 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1247 flow [2024-06-27 21:14:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1247, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-06-27 21:14:20,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-27 21:14:20,327 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1247 flow [2024-06-27 21:14:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:20,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:20,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:14:20,328 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:20,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1463878295, now seen corresponding path program 3 times [2024-06-27 21:14:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846218185] [2024-06-27 21:14:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:22,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846218185] [2024-06-27 21:14:22,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846218185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:22,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:22,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:22,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509582000] [2024-06-27 21:14:22,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:22,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:22,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:22,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:22,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1247 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:22,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:22,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:22,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:24,119 INFO L124 PetriNetUnfolderBase]: 2061/3244 cut-off events. [2024-06-27 21:14:24,119 INFO L125 PetriNetUnfolderBase]: For 80598/80598 co-relation queries the response was YES. [2024-06-27 21:14:24,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18793 conditions, 3244 events. 2061/3244 cut-off events. For 80598/80598 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17411 event pairs, 640 based on Foata normal form. 8/3251 useless extension candidates. Maximal degree in co-relation 18741. Up to 2963 conditions per place. [2024-06-27 21:14:24,140 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-27 21:14:24,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 1837 flow [2024-06-27 21:14:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:14:24,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:14:24,142 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1247 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:14:24,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 1837 flow [2024-06-27 21:14:24,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 1755 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:24,203 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1307 flow [2024-06-27 21:14:24,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1307, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-27 21:14:24,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-27 21:14:24,204 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1307 flow [2024-06-27 21:14:24,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:24,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:24,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:24,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:14:24,205 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:24,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:24,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1081329479, now seen corresponding path program 4 times [2024-06-27 21:14:24,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:24,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964277367] [2024-06-27 21:14:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:24,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:26,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964277367] [2024-06-27 21:14:26,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964277367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:26,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:26,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028744847] [2024-06-27 21:14:26,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:26,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:26,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:26,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:26,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:26,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:26,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:27,837 INFO L124 PetriNetUnfolderBase]: 2081/3270 cut-off events. [2024-06-27 21:14:27,837 INFO L125 PetriNetUnfolderBase]: For 79443/79443 co-relation queries the response was YES. [2024-06-27 21:14:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19005 conditions, 3270 events. 2081/3270 cut-off events. For 79443/79443 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17509 event pairs, 537 based on Foata normal form. 4/3272 useless extension candidates. Maximal degree in co-relation 18951. Up to 2686 conditions per place. [2024-06-27 21:14:27,861 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 66 changer transitions 0/185 dead transitions. [2024-06-27 21:14:27,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 185 transitions, 1838 flow [2024-06-27 21:14:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:14:27,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:14:27,863 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1307 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:14:27,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 185 transitions, 1838 flow [2024-06-27 21:14:27,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 185 transitions, 1737 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:27,918 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1391 flow [2024-06-27 21:14:27,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-27 21:14:27,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 21:14:27,919 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1391 flow [2024-06-27 21:14:27,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:27,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:27,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:14:27,919 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:27,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 354084441, now seen corresponding path program 1 times [2024-06-27 21:14:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620540530] [2024-06-27 21:14:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:27,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:29,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620540530] [2024-06-27 21:14:29,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620540530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:29,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:29,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112457594] [2024-06-27 21:14:29,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:29,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:29,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1391 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:29,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:29,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:29,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:30,977 INFO L124 PetriNetUnfolderBase]: 2091/3299 cut-off events. [2024-06-27 21:14:30,977 INFO L125 PetriNetUnfolderBase]: For 84710/84710 co-relation queries the response was YES. [2024-06-27 21:14:30,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19411 conditions, 3299 events. 2091/3299 cut-off events. For 84710/84710 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17726 event pairs, 606 based on Foata normal form. 2/3300 useless extension candidates. Maximal degree in co-relation 19356. Up to 3039 conditions per place. [2024-06-27 21:14:31,001 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-27 21:14:31,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 1915 flow [2024-06-27 21:14:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:14:31,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 21:14:31,003 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1391 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:14:31,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 1915 flow [2024-06-27 21:14:31,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1748 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:31,066 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1313 flow [2024-06-27 21:14:31,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1313, PETRI_PLACES=124, PETRI_TRANSITIONS=151} [2024-06-27 21:14:31,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 21:14:31,067 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1313 flow [2024-06-27 21:14:31,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:31,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:31,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:31,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:14:31,068 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:31,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1889491401, now seen corresponding path program 5 times [2024-06-27 21:14:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:31,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468855053] [2024-06-27 21:14:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:31,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:33,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:33,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468855053] [2024-06-27 21:14:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468855053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720076440] [2024-06-27 21:14:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:33,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:33,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:33,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 151 transitions, 1313 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:33,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:33,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:33,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:34,773 INFO L124 PetriNetUnfolderBase]: 2083/3262 cut-off events. [2024-06-27 21:14:34,773 INFO L125 PetriNetUnfolderBase]: For 87526/87526 co-relation queries the response was YES. [2024-06-27 21:14:34,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19041 conditions, 3262 events. 2083/3262 cut-off events. For 87526/87526 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17376 event pairs, 627 based on Foata normal form. 4/3252 useless extension candidates. Maximal degree in co-relation 18985. Up to 2688 conditions per place. [2024-06-27 21:14:34,793 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 69 changer transitions 0/186 dead transitions. [2024-06-27 21:14:34,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1838 flow [2024-06-27 21:14:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:14:34,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:14:34,795 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1313 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:14:34,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1838 flow [2024-06-27 21:14:34,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 1797 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:34,853 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1467 flow [2024-06-27 21:14:34,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1467, PETRI_PLACES=129, PETRI_TRANSITIONS=153} [2024-06-27 21:14:34,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 21:14:34,854 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1467 flow [2024-06-27 21:14:34,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:34,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:34,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:34,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:14:34,855 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:34,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash 354500151, now seen corresponding path program 2 times [2024-06-27 21:14:34,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:34,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223235343] [2024-06-27 21:14:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:36,804 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 21:14:36,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:36,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223235343] [2024-06-27 21:14:36,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223235343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:36,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:36,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184154518] [2024-06-27 21:14:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:36,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:36,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:36,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:36,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 153 transitions, 1467 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:36,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:36,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:36,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:37,977 INFO L124 PetriNetUnfolderBase]: 2057/3236 cut-off events. [2024-06-27 21:14:37,978 INFO L125 PetriNetUnfolderBase]: For 93454/93454 co-relation queries the response was YES. [2024-06-27 21:14:37,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19270 conditions, 3236 events. 2057/3236 cut-off events. For 93454/93454 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17246 event pairs, 587 based on Foata normal form. 6/3234 useless extension candidates. Maximal degree in co-relation 19213. Up to 3008 conditions per place. [2024-06-27 21:14:38,000 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 139 selfloop transitions, 25 changer transitions 0/169 dead transitions. [2024-06-27 21:14:38,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 169 transitions, 1861 flow [2024-06-27 21:14:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:14:38,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 21:14:38,002 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1467 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:14:38,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 169 transitions, 1861 flow [2024-06-27 21:14:38,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 169 transitions, 1672 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:38,077 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1336 flow [2024-06-27 21:14:38,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1336, PETRI_PLACES=129, PETRI_TRANSITIONS=153} [2024-06-27 21:14:38,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 21:14:38,078 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1336 flow [2024-06-27 21:14:38,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:38,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:38,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:38,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:14:38,079 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:38,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash 348793175, now seen corresponding path program 1 times [2024-06-27 21:14:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562382120] [2024-06-27 21:14:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:38,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:39,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:39,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562382120] [2024-06-27 21:14:39,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562382120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:39,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:39,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:39,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968083613] [2024-06-27 21:14:39,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:39,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:39,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:39,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:39,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 153 transitions, 1336 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:39,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:39,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:39,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:41,122 INFO L124 PetriNetUnfolderBase]: 2062/3250 cut-off events. [2024-06-27 21:14:41,122 INFO L125 PetriNetUnfolderBase]: For 94301/94301 co-relation queries the response was YES. [2024-06-27 21:14:41,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 3250 events. 2062/3250 cut-off events. For 94301/94301 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17433 event pairs, 645 based on Foata normal form. 1/3249 useless extension candidates. Maximal degree in co-relation 19005. Up to 3079 conditions per place. [2024-06-27 21:14:41,146 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 154 selfloop transitions, 21 changer transitions 0/180 dead transitions. [2024-06-27 21:14:41,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 180 transitions, 1964 flow [2024-06-27 21:14:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:14:41,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 21:14:41,147 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1336 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:14:41,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 180 transitions, 1964 flow [2024-06-27 21:14:41,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 1889 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:41,206 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1435 flow [2024-06-27 21:14:41,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1435, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-06-27 21:14:41,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-27 21:14:41,207 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1435 flow [2024-06-27 21:14:41,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:41,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:41,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:41,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:14:41,207 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:41,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1527974585, now seen corresponding path program 2 times [2024-06-27 21:14:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:41,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714545410] [2024-06-27 21:14:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714545410] [2024-06-27 21:14:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714545410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:43,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716173913] [2024-06-27 21:14:43,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:43,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:43,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:43,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1435 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:43,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:43,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:44,069 INFO L124 PetriNetUnfolderBase]: 2075/3263 cut-off events. [2024-06-27 21:14:44,069 INFO L125 PetriNetUnfolderBase]: For 100496/100496 co-relation queries the response was YES. [2024-06-27 21:14:44,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19692 conditions, 3263 events. 2075/3263 cut-off events. For 100496/100496 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17494 event pairs, 669 based on Foata normal form. 1/3263 useless extension candidates. Maximal degree in co-relation 19632. Up to 3141 conditions per place. [2024-06-27 21:14:44,094 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 160 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-06-27 21:14:44,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 179 transitions, 1918 flow [2024-06-27 21:14:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:14:44,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-27 21:14:44,095 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1435 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:14:44,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 179 transitions, 1918 flow [2024-06-27 21:14:44,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 1846 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-27 21:14:44,196 INFO L231 Difference]: Finished difference. Result has 137 places, 165 transitions, 1440 flow [2024-06-27 21:14:44,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1440, PETRI_PLACES=137, PETRI_TRANSITIONS=165} [2024-06-27 21:14:44,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-27 21:14:44,197 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 165 transitions, 1440 flow [2024-06-27 21:14:44,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:44,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:44,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:44,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:14:44,198 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -206147107, now seen corresponding path program 1 times [2024-06-27 21:14:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797904847] [2024-06-27 21:14:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:46,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797904847] [2024-06-27 21:14:46,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797904847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:46,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:46,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:46,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299700794] [2024-06-27 21:14:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:46,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:46,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:46,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:46,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 165 transitions, 1440 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:46,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:46,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:46,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:48,106 INFO L124 PetriNetUnfolderBase]: 2211/3497 cut-off events. [2024-06-27 21:14:48,106 INFO L125 PetriNetUnfolderBase]: For 121874/121874 co-relation queries the response was YES. [2024-06-27 21:14:48,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20721 conditions, 3497 events. 2211/3497 cut-off events. For 121874/121874 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19104 event pairs, 474 based on Foata normal form. 32/3528 useless extension candidates. Maximal degree in co-relation 20657. Up to 2462 conditions per place. [2024-06-27 21:14:48,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 176 selfloop transitions, 39 changer transitions 0/220 dead transitions. [2024-06-27 21:14:48,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2213 flow [2024-06-27 21:14:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:14:48,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:14:48,132 INFO L175 Difference]: Start difference. First operand has 137 places, 165 transitions, 1440 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:14:48,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2213 flow [2024-06-27 21:14:48,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2175 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:48,223 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1538 flow [2024-06-27 21:14:48,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1538, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-27 21:14:48,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-27 21:14:48,224 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1538 flow [2024-06-27 21:14:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:48,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:48,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:14:48,224 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:48,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -428873077, now seen corresponding path program 2 times [2024-06-27 21:14:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139175817] [2024-06-27 21:14:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139175817] [2024-06-27 21:14:50,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139175817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:50,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:50,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033638580] [2024-06-27 21:14:50,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:50,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:50,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1538 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:50,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:50,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:50,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:51,984 INFO L124 PetriNetUnfolderBase]: 2139/3380 cut-off events. [2024-06-27 21:14:51,984 INFO L125 PetriNetUnfolderBase]: For 114494/114494 co-relation queries the response was YES. [2024-06-27 21:14:51,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19519 conditions, 3380 events. 2139/3380 cut-off events. For 114494/114494 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18277 event pairs, 604 based on Foata normal form. 40/3419 useless extension candidates. Maximal degree in co-relation 19454. Up to 2858 conditions per place. [2024-06-27 21:14:52,009 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 181 selfloop transitions, 29 changer transitions 0/215 dead transitions. [2024-06-27 21:14:52,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2129 flow [2024-06-27 21:14:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:14:52,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 21:14:52,011 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1538 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:14:52,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2129 flow [2024-06-27 21:14:52,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 215 transitions, 2019 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:52,150 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1496 flow [2024-06-27 21:14:52,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1496, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2024-06-27 21:14:52,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 21:14:52,151 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1496 flow [2024-06-27 21:14:52,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:52,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:52,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:52,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:14:52,151 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:52,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash -96219155, now seen corresponding path program 3 times [2024-06-27 21:14:52,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:52,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264542191] [2024-06-27 21:14:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:52,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:54,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264542191] [2024-06-27 21:14:54,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264542191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:54,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:54,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:54,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984337459] [2024-06-27 21:14:54,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:54,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:54,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:54,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:54,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1496 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:54,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:54,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:54,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:56,106 INFO L124 PetriNetUnfolderBase]: 2227/3551 cut-off events. [2024-06-27 21:14:56,106 INFO L125 PetriNetUnfolderBase]: For 111173/111177 co-relation queries the response was YES. [2024-06-27 21:14:56,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19945 conditions, 3551 events. 2227/3551 cut-off events. For 111173/111177 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19564 event pairs, 503 based on Foata normal form. 24/3573 useless extension candidates. Maximal degree in co-relation 19879. Up to 2821 conditions per place. [2024-06-27 21:14:56,131 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 66 changer transitions 0/211 dead transitions. [2024-06-27 21:14:56,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 211 transitions, 2087 flow [2024-06-27 21:14:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:14:56,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:14:56,133 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1496 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:14:56,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 211 transitions, 2087 flow [2024-06-27 21:14:56,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 211 transitions, 1988 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:14:56,225 INFO L231 Difference]: Finished difference. Result has 143 places, 168 transitions, 1566 flow [2024-06-27 21:14:56,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=143, PETRI_TRANSITIONS=168} [2024-06-27 21:14:56,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-27 21:14:56,226 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 168 transitions, 1566 flow [2024-06-27 21:14:56,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:56,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:56,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:56,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:14:56,227 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:56,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1149958253, now seen corresponding path program 4 times [2024-06-27 21:14:56,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:56,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010127529] [2024-06-27 21:14:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010127529] [2024-06-27 21:14:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010127529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:58,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769011433] [2024-06-27 21:14:58,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:58,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:58,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:58,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 168 transitions, 1566 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:14:58,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:58,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:58,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:00,401 INFO L124 PetriNetUnfolderBase]: 2315/3693 cut-off events. [2024-06-27 21:15:00,402 INFO L125 PetriNetUnfolderBase]: For 119353/119353 co-relation queries the response was YES. [2024-06-27 21:15:00,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20824 conditions, 3693 events. 2315/3693 cut-off events. For 119353/119353 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20642 event pairs, 545 based on Foata normal form. 20/3711 useless extension candidates. Maximal degree in co-relation 20757. Up to 2969 conditions per place. [2024-06-27 21:15:00,431 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 146 selfloop transitions, 65 changer transitions 0/216 dead transitions. [2024-06-27 21:15:00,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2185 flow [2024-06-27 21:15:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:15:00,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 21:15:00,433 INFO L175 Difference]: Start difference. First operand has 143 places, 168 transitions, 1566 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:15:00,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2185 flow [2024-06-27 21:15:00,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2034 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:00,519 INFO L231 Difference]: Finished difference. Result has 146 places, 169 transitions, 1584 flow [2024-06-27 21:15:00,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1584, PETRI_PLACES=146, PETRI_TRANSITIONS=169} [2024-06-27 21:15:00,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-27 21:15:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 169 transitions, 1584 flow [2024-06-27 21:15:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:00,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:00,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:15:00,520 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:00,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -310116115, now seen corresponding path program 5 times [2024-06-27 21:15:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135842458] [2024-06-27 21:15:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:03,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:03,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135842458] [2024-06-27 21:15:03,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135842458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:03,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:03,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:03,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769378950] [2024-06-27 21:15:03,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:03,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:03,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:03,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 169 transitions, 1584 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:03,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:03,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:03,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:04,944 INFO L124 PetriNetUnfolderBase]: 2383/3809 cut-off events. [2024-06-27 21:15:04,944 INFO L125 PetriNetUnfolderBase]: For 123935/123935 co-relation queries the response was YES. [2024-06-27 21:15:04,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21359 conditions, 3809 events. 2383/3809 cut-off events. For 123935/123935 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21445 event pairs, 529 based on Foata normal form. 16/3823 useless extension candidates. Maximal degree in co-relation 21291. Up to 2951 conditions per place. [2024-06-27 21:15:04,972 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 68 changer transitions 0/226 dead transitions. [2024-06-27 21:15:04,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 226 transitions, 2255 flow [2024-06-27 21:15:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:15:04,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 21:15:04,976 INFO L175 Difference]: Start difference. First operand has 146 places, 169 transitions, 1584 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:15:04,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 226 transitions, 2255 flow [2024-06-27 21:15:05,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 226 transitions, 2104 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:05,091 INFO L231 Difference]: Finished difference. Result has 149 places, 170 transitions, 1609 flow [2024-06-27 21:15:05,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1609, PETRI_PLACES=149, PETRI_TRANSITIONS=170} [2024-06-27 21:15:05,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-27 21:15:05,093 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 170 transitions, 1609 flow [2024-06-27 21:15:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:15:05,093 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:05,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -103041943, now seen corresponding path program 1 times [2024-06-27 21:15:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:05,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043622973] [2024-06-27 21:15:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:07,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043622973] [2024-06-27 21:15:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043622973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:07,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:07,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252525778] [2024-06-27 21:15:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:07,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:07,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 170 transitions, 1609 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:07,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:07,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:09,405 INFO L124 PetriNetUnfolderBase]: 2555/4097 cut-off events. [2024-06-27 21:15:09,405 INFO L125 PetriNetUnfolderBase]: For 142295/142299 co-relation queries the response was YES. [2024-06-27 21:15:09,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 4097 events. 2555/4097 cut-off events. For 142295/142299 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23637 event pairs, 565 based on Foata normal form. 16/4111 useless extension candidates. Maximal degree in co-relation 23413. Up to 2627 conditions per place. [2024-06-27 21:15:09,433 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-27 21:15:09,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 2402 flow [2024-06-27 21:15:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 21:15:09,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 21:15:09,435 INFO L175 Difference]: Start difference. First operand has 149 places, 170 transitions, 1609 flow. Second operand 8 states and 158 transitions. [2024-06-27 21:15:09,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 2402 flow [2024-06-27 21:15:09,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 2238 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:09,538 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 1661 flow [2024-06-27 21:15:09,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=149, PETRI_TRANSITIONS=172} [2024-06-27 21:15:09,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-27 21:15:09,539 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 1661 flow [2024-06-27 21:15:09,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:09,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:09,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:09,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:15:09,540 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:09,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash -874250695, now seen corresponding path program 6 times [2024-06-27 21:15:09,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:09,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536786350] [2024-06-27 21:15:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:11,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536786350] [2024-06-27 21:15:11,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536786350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:11,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:11,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:11,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160373140] [2024-06-27 21:15:11,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:11,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:11,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:12,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:12,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 1661 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:12,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:12,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:12,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:13,661 INFO L124 PetriNetUnfolderBase]: 2643/4247 cut-off events. [2024-06-27 21:15:13,662 INFO L125 PetriNetUnfolderBase]: For 155924/155932 co-relation queries the response was YES. [2024-06-27 21:15:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24293 conditions, 4247 events. 2643/4247 cut-off events. For 155924/155932 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24763 event pairs, 650 based on Foata normal form. 28/4267 useless extension candidates. Maximal degree in co-relation 24223. Up to 3521 conditions per place. [2024-06-27 21:15:13,696 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-06-27 21:15:13,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 212 transitions, 2250 flow [2024-06-27 21:15:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:15:13,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:15:13,698 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 1661 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:15:13,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 212 transitions, 2250 flow [2024-06-27 21:15:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 212 transitions, 2145 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:13,853 INFO L231 Difference]: Finished difference. Result has 153 places, 173 transitions, 1729 flow [2024-06-27 21:15:13,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1729, PETRI_PLACES=153, PETRI_TRANSITIONS=173} [2024-06-27 21:15:13,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-27 21:15:13,863 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 173 transitions, 1729 flow [2024-06-27 21:15:13,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:13,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:13,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:13,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:15:13,864 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:13,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1490881031, now seen corresponding path program 7 times [2024-06-27 21:15:13,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:13,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059205439] [2024-06-27 21:15:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:13,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059205439] [2024-06-27 21:15:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059205439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475299431] [2024-06-27 21:15:16,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:16,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:16,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 173 transitions, 1729 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:16,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:16,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:16,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:18,473 INFO L124 PetriNetUnfolderBase]: 2607/4186 cut-off events. [2024-06-27 21:15:18,474 INFO L125 PetriNetUnfolderBase]: For 149072/149072 co-relation queries the response was YES. [2024-06-27 21:15:18,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23600 conditions, 4186 events. 2607/4186 cut-off events. For 149072/149072 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24335 event pairs, 692 based on Foata normal form. 20/4193 useless extension candidates. Maximal degree in co-relation 23528. Up to 3465 conditions per place. [2024-06-27 21:15:18,503 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 68 changer transitions 0/216 dead transitions. [2024-06-27 21:15:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 216 transitions, 2306 flow [2024-06-27 21:15:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:15:18,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:15:18,505 INFO L175 Difference]: Start difference. First operand has 153 places, 173 transitions, 1729 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:15:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 216 transitions, 2306 flow [2024-06-27 21:15:18,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 216 transitions, 2135 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:18,678 INFO L231 Difference]: Finished difference. Result has 156 places, 173 transitions, 1701 flow [2024-06-27 21:15:18,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1701, PETRI_PLACES=156, PETRI_TRANSITIONS=173} [2024-06-27 21:15:18,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-27 21:15:18,679 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 173 transitions, 1701 flow [2024-06-27 21:15:18,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:18,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:18,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:18,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:15:18,680 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:18,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1921087965, now seen corresponding path program 8 times [2024-06-27 21:15:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:18,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182784124] [2024-06-27 21:15:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:21,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:21,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182784124] [2024-06-27 21:15:21,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182784124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:21,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:21,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545314547] [2024-06-27 21:15:21,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:21,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:21,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:21,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:21,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 173 transitions, 1701 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:21,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:21,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:21,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:22,925 INFO L124 PetriNetUnfolderBase]: 2619/4203 cut-off events. [2024-06-27 21:15:22,925 INFO L125 PetriNetUnfolderBase]: For 144482/144482 co-relation queries the response was YES. [2024-06-27 21:15:22,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23196 conditions, 4203 events. 2619/4203 cut-off events. For 144482/144482 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24465 event pairs, 672 based on Foata normal form. 16/4205 useless extension candidates. Maximal degree in co-relation 23123. Up to 3359 conditions per place. [2024-06-27 21:15:22,958 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 71 changer transitions 0/226 dead transitions. [2024-06-27 21:15:22,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 226 transitions, 2366 flow [2024-06-27 21:15:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:15:22,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 21:15:22,960 INFO L175 Difference]: Start difference. First operand has 156 places, 173 transitions, 1701 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:15:22,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 226 transitions, 2366 flow [2024-06-27 21:15:23,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2205 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:23,091 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 1728 flow [2024-06-27 21:15:23,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1728, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-27 21:15:23,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 21:15:23,092 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 1728 flow [2024-06-27 21:15:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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 21:15:23,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:23,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:23,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:15:23,092 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:23,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1487712601, now seen corresponding path program 2 times [2024-06-27 21:15:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:23,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333288524] [2024-06-27 21:15:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:23,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:25,742 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 21:15:25,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:25,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333288524] [2024-06-27 21:15:25,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333288524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:25,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:25,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:25,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194849720] [2024-06-27 21:15:25,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:25,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:25,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 1728 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:25,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:25,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:25,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:27,399 INFO L124 PetriNetUnfolderBase]: 2667/4309 cut-off events. [2024-06-27 21:15:27,400 INFO L125 PetriNetUnfolderBase]: For 150514/150522 co-relation queries the response was YES. [2024-06-27 21:15:27,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23733 conditions, 4309 events. 2667/4309 cut-off events. For 150514/150522 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25485 event pairs, 636 based on Foata normal form. 20/4321 useless extension candidates. Maximal degree in co-relation 23659. Up to 3467 conditions per place. [2024-06-27 21:15:27,428 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 147 selfloop transitions, 65 changer transitions 0/217 dead transitions. [2024-06-27 21:15:27,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 217 transitions, 2349 flow [2024-06-27 21:15:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 21:15:27,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 21:15:27,430 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 1728 flow. Second operand 8 states and 151 transitions. [2024-06-27 21:15:27,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 217 transitions, 2349 flow [2024-06-27 21:15:27,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2173 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:27,588 INFO L231 Difference]: Finished difference. Result has 158 places, 175 transitions, 1730 flow [2024-06-27 21:15:27,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1730, PETRI_PLACES=158, PETRI_TRANSITIONS=175} [2024-06-27 21:15:27,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 21:15:27,588 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 175 transitions, 1730 flow [2024-06-27 21:15:27,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:27,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:27,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:15:27,589 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:27,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:27,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1931422037, now seen corresponding path program 3 times [2024-06-27 21:15:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446596203] [2024-06-27 21:15:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:27,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:30,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:30,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446596203] [2024-06-27 21:15:30,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446596203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:30,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:30,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087326241] [2024-06-27 21:15:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:30,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:30,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 175 transitions, 1730 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:30,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:30,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:30,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:31,759 INFO L124 PetriNetUnfolderBase]: 2647/4289 cut-off events. [2024-06-27 21:15:31,759 INFO L125 PetriNetUnfolderBase]: For 145612/145620 co-relation queries the response was YES. [2024-06-27 21:15:31,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22964 conditions, 4289 events. 2647/4289 cut-off events. For 145612/145620 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25342 event pairs, 587 based on Foata normal form. 20/4301 useless extension candidates. Maximal degree in co-relation 22889. Up to 2455 conditions per place. [2024-06-27 21:15:31,790 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 75 changer transitions 0/215 dead transitions. [2024-06-27 21:15:31,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 215 transitions, 2229 flow [2024-06-27 21:15:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:15:31,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:15:31,792 INFO L175 Difference]: Start difference. First operand has 158 places, 175 transitions, 1730 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:15:31,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 215 transitions, 2229 flow [2024-06-27 21:15:31,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2067 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:31,902 INFO L231 Difference]: Finished difference. Result has 159 places, 174 transitions, 1650 flow [2024-06-27 21:15:31,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1650, PETRI_PLACES=159, PETRI_TRANSITIONS=174} [2024-06-27 21:15:31,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-27 21:15:31,903 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 174 transitions, 1650 flow [2024-06-27 21:15:31,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:31,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:31,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:31,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:15:31,904 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:31,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1259993723, now seen corresponding path program 1 times [2024-06-27 21:15:31,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:31,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480595289] [2024-06-27 21:15:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480595289] [2024-06-27 21:15:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480595289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:33,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:15:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571979788] [2024-06-27 21:15:33,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:33,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:15:33,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:15:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:15:33,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:33,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 174 transitions, 1650 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:33,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:33,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:33,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:35,320 INFO L124 PetriNetUnfolderBase]: 2657/4304 cut-off events. [2024-06-27 21:15:35,320 INFO L125 PetriNetUnfolderBase]: For 143391/143393 co-relation queries the response was YES. [2024-06-27 21:15:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23152 conditions, 4304 events. 2657/4304 cut-off events. For 143391/143393 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25509 event pairs, 811 based on Foata normal form. 4/4307 useless extension candidates. Maximal degree in co-relation 23076. Up to 4094 conditions per place. [2024-06-27 21:15:35,355 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 165 selfloop transitions, 25 changer transitions 0/195 dead transitions. [2024-06-27 21:15:35,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 2209 flow [2024-06-27 21:15:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:15:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:15:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:15:35,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 21:15:35,370 INFO L175 Difference]: Start difference. First operand has 159 places, 174 transitions, 1650 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:15:35,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 2209 flow [2024-06-27 21:15:35,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 195 transitions, 1958 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:35,487 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1492 flow [2024-06-27 21:15:35,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1492, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-27 21:15:35,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-27 21:15:35,489 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1492 flow [2024-06-27 21:15:35,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:35,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:35,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:35,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:15:35,490 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:35,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1297967483, now seen corresponding path program 2 times [2024-06-27 21:15:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366136696] [2024-06-27 21:15:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:37,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:37,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366136696] [2024-06-27 21:15:37,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366136696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:37,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:37,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:37,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359584722] [2024-06-27 21:15:37,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:37,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:37,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1492 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:37,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:37,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:37,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:39,262 INFO L124 PetriNetUnfolderBase]: 2651/4296 cut-off events. [2024-06-27 21:15:39,262 INFO L125 PetriNetUnfolderBase]: For 144060/144060 co-relation queries the response was YES. [2024-06-27 21:15:39,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22152 conditions, 4296 events. 2651/4296 cut-off events. For 144060/144060 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25498 event pairs, 819 based on Foata normal form. 2/4296 useless extension candidates. Maximal degree in co-relation 22077. Up to 4089 conditions per place. [2024-06-27 21:15:39,297 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 164 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-27 21:15:39,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 196 transitions, 2020 flow [2024-06-27 21:15:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:15:39,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 21:15:39,299 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1492 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:15:39,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 196 transitions, 2020 flow [2024-06-27 21:15:39,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 1940 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:39,456 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1472 flow [2024-06-27 21:15:39,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1472, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-27 21:15:39,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-27 21:15:39,457 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1472 flow [2024-06-27 21:15:39,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:39,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:39,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:39,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:15:39,458 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:39,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2072311431, now seen corresponding path program 1 times [2024-06-27 21:15:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:39,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622401571] [2024-06-27 21:15:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:41,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:41,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622401571] [2024-06-27 21:15:41,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622401571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:41,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:41,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:41,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623768511] [2024-06-27 21:15:41,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:41,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:41,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:41,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:41,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:41,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:41,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:41,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:41,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:43,525 INFO L124 PetriNetUnfolderBase]: 2699/4371 cut-off events. [2024-06-27 21:15:43,525 INFO L125 PetriNetUnfolderBase]: For 155622/155622 co-relation queries the response was YES. [2024-06-27 21:15:43,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22776 conditions, 4371 events. 2699/4371 cut-off events. For 155622/155622 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25939 event pairs, 835 based on Foata normal form. 4/4367 useless extension candidates. Maximal degree in co-relation 22701. Up to 3733 conditions per place. [2024-06-27 21:15:43,558 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 57 changer transitions 0/227 dead transitions. [2024-06-27 21:15:43,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 227 transitions, 2492 flow [2024-06-27 21:15:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:15:43,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:15:43,560 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1472 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:15:43,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 227 transitions, 2492 flow [2024-06-27 21:15:43,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2390 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 21:15:43,678 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 1746 flow [2024-06-27 21:15:43,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-06-27 21:15:43,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-27 21:15:43,679 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 1746 flow [2024-06-27 21:15:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:43,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:43,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:43,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:15:43,679 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:43,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:43,680 INFO L85 PathProgramCache]: Analyzing trace with hash 122573725, now seen corresponding path program 3 times [2024-06-27 21:15:43,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:43,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096573447] [2024-06-27 21:15:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:45,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096573447] [2024-06-27 21:15:45,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096573447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:45,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:45,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:15:45,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262556695] [2024-06-27 21:15:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:15:45,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:15:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:15:45,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:45,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 1746 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:45,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:45,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:45,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:46,934 INFO L124 PetriNetUnfolderBase]: 2693/4366 cut-off events. [2024-06-27 21:15:46,935 INFO L125 PetriNetUnfolderBase]: For 159767/159767 co-relation queries the response was YES. [2024-06-27 21:15:46,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23677 conditions, 4366 events. 2693/4366 cut-off events. For 159767/159767 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25900 event pairs, 848 based on Foata normal form. 2/4367 useless extension candidates. Maximal degree in co-relation 23602. Up to 4201 conditions per place. [2024-06-27 21:15:46,967 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 190 selfloop transitions, 14 changer transitions 0/209 dead transitions. [2024-06-27 21:15:46,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 2194 flow [2024-06-27 21:15:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:15:46,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-27 21:15:46,968 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 1746 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:15:46,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 2194 flow [2024-06-27 21:15:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 209 transitions, 2128 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-27 21:15:47,147 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 1714 flow [2024-06-27 21:15:47,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1714, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-27 21:15:47,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 21:15:47,161 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 1714 flow [2024-06-27 21:15:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:47,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:47,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:47,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:15:47,161 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:47,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1894942761, now seen corresponding path program 2 times [2024-06-27 21:15:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:47,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360317459] [2024-06-27 21:15:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:47,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:49,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360317459] [2024-06-27 21:15:49,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360317459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:49,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:49,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791705132] [2024-06-27 21:15:49,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:49,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:49,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:49,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 1714 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:49,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:49,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:49,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:50,989 INFO L124 PetriNetUnfolderBase]: 2971/4751 cut-off events. [2024-06-27 21:15:50,990 INFO L125 PetriNetUnfolderBase]: For 201423/201423 co-relation queries the response was YES. [2024-06-27 21:15:51,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26778 conditions, 4751 events. 2971/4751 cut-off events. For 201423/201423 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28085 event pairs, 751 based on Foata normal form. 6/4749 useless extension candidates. Maximal degree in co-relation 26700. Up to 4171 conditions per place. [2024-06-27 21:15:51,028 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-06-27 21:15:51,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 248 transitions, 2790 flow [2024-06-27 21:15:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:15:51,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:15:51,030 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 1714 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:15:51,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 248 transitions, 2790 flow [2024-06-27 21:15:51,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 248 transitions, 2762 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:51,225 INFO L231 Difference]: Finished difference. Result has 171 places, 219 transitions, 2105 flow [2024-06-27 21:15:51,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2105, PETRI_PLACES=171, PETRI_TRANSITIONS=219} [2024-06-27 21:15:51,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-27 21:15:51,225 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 219 transitions, 2105 flow [2024-06-27 21:15:51,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:51,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:51,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:51,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:15:51,226 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:51,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1041062549, now seen corresponding path program 3 times [2024-06-27 21:15:51,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:51,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156287451] [2024-06-27 21:15:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:51,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:53,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:53,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156287451] [2024-06-27 21:15:53,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156287451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:53,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:53,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:53,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912621984] [2024-06-27 21:15:53,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:53,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:53,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:53,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:53,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 219 transitions, 2105 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:53,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:53,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:53,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:55,266 INFO L124 PetriNetUnfolderBase]: 2961/4729 cut-off events. [2024-06-27 21:15:55,267 INFO L125 PetriNetUnfolderBase]: For 206461/206461 co-relation queries the response was YES. [2024-06-27 21:15:55,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27910 conditions, 4729 events. 2961/4729 cut-off events. For 206461/206461 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27885 event pairs, 748 based on Foata normal form. 6/4727 useless extension candidates. Maximal degree in co-relation 27829. Up to 4170 conditions per place. [2024-06-27 21:15:55,310 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 183 selfloop transitions, 62 changer transitions 0/250 dead transitions. [2024-06-27 21:15:55,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 250 transitions, 3017 flow [2024-06-27 21:15:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:15:55,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:15:55,311 INFO L175 Difference]: Start difference. First operand has 171 places, 219 transitions, 2105 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:15:55,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 250 transitions, 3017 flow [2024-06-27 21:15:55,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 250 transitions, 2850 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:55,596 INFO L231 Difference]: Finished difference. Result has 176 places, 228 transitions, 2259 flow [2024-06-27 21:15:55,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2259, PETRI_PLACES=176, PETRI_TRANSITIONS=228} [2024-06-27 21:15:55,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 21:15:55,597 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 228 transitions, 2259 flow [2024-06-27 21:15:55,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:55,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:55,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:15:55,597 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:55,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1040816471, now seen corresponding path program 1 times [2024-06-27 21:15:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:55,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871892630] [2024-06-27 21:15:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:59,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:59,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871892630] [2024-06-27 21:15:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871892630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:59,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712786810] [2024-06-27 21:15:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:59,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:59,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 228 transitions, 2259 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:59,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:59,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:00,753 INFO L124 PetriNetUnfolderBase]: 3000/4786 cut-off events. [2024-06-27 21:16:00,753 INFO L125 PetriNetUnfolderBase]: For 224000/224000 co-relation queries the response was YES. [2024-06-27 21:16:00,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28331 conditions, 4786 events. 3000/4786 cut-off events. For 224000/224000 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28170 event pairs, 749 based on Foata normal form. 14/4792 useless extension candidates. Maximal degree in co-relation 28247. Up to 4464 conditions per place. [2024-06-27 21:16:00,797 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 215 selfloop transitions, 33 changer transitions 0/253 dead transitions. [2024-06-27 21:16:00,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 253 transitions, 2899 flow [2024-06-27 21:16:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:16:00,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:16:00,800 INFO L175 Difference]: Start difference. First operand has 176 places, 228 transitions, 2259 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:16:00,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 253 transitions, 2899 flow [2024-06-27 21:16:01,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 253 transitions, 2798 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:01,080 INFO L231 Difference]: Finished difference. Result has 180 places, 230 transitions, 2263 flow [2024-06-27 21:16:01,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2263, PETRI_PLACES=180, PETRI_TRANSITIONS=230} [2024-06-27 21:16:01,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 21:16:01,080 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 230 transitions, 2263 flow [2024-06-27 21:16:01,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:01,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:01,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:01,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:16:01,081 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:01,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 538570350, now seen corresponding path program 1 times [2024-06-27 21:16:01,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:01,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528960516] [2024-06-27 21:16:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:01,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:03,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:03,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528960516] [2024-06-27 21:16:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528960516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:03,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:03,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:03,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209009921] [2024-06-27 21:16:03,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:03,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:03,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:03,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 230 transitions, 2263 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:03,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:03,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:03,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:04,741 INFO L124 PetriNetUnfolderBase]: 3061/4910 cut-off events. [2024-06-27 21:16:04,741 INFO L125 PetriNetUnfolderBase]: For 224369/224369 co-relation queries the response was YES. [2024-06-27 21:16:04,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29522 conditions, 4910 events. 3061/4910 cut-off events. For 224369/224369 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29308 event pairs, 841 based on Foata normal form. 1/4909 useless extension candidates. Maximal degree in co-relation 29436. Up to 4093 conditions per place. [2024-06-27 21:16:04,785 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 81 changer transitions 0/278 dead transitions. [2024-06-27 21:16:04,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 278 transitions, 3435 flow [2024-06-27 21:16:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 21:16:04,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 21:16:04,787 INFO L175 Difference]: Start difference. First operand has 180 places, 230 transitions, 2263 flow. Second operand 7 states and 139 transitions. [2024-06-27 21:16:04,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 278 transitions, 3435 flow [2024-06-27 21:16:05,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 278 transitions, 3350 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:05,083 INFO L231 Difference]: Finished difference. Result has 185 places, 246 transitions, 2702 flow [2024-06-27 21:16:05,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=185, PETRI_TRANSITIONS=246} [2024-06-27 21:16:05,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 21:16:05,084 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 246 transitions, 2702 flow [2024-06-27 21:16:05,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:05,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:05,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:05,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:16:05,085 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:05,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:05,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1935113322, now seen corresponding path program 2 times [2024-06-27 21:16:05,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:05,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411535869] [2024-06-27 21:16:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:05,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:07,465 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 21:16:07,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411535869] [2024-06-27 21:16:07,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411535869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:07,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:07,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405398098] [2024-06-27 21:16:07,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:07,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:07,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:07,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:07,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:07,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 246 transitions, 2702 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:07,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:07,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:07,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:09,056 INFO L124 PetriNetUnfolderBase]: 3103/4959 cut-off events. [2024-06-27 21:16:09,056 INFO L125 PetriNetUnfolderBase]: For 241531/241531 co-relation queries the response was YES. [2024-06-27 21:16:09,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31230 conditions, 4959 events. 3103/4959 cut-off events. For 241531/241531 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29500 event pairs, 809 based on Foata normal form. 2/4960 useless extension candidates. Maximal degree in co-relation 31140. Up to 4640 conditions per place. [2024-06-27 21:16:09,099 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 45 changer transitions 0/286 dead transitions. [2024-06-27 21:16:09,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 286 transitions, 3714 flow [2024-06-27 21:16:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:16:09,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:16:09,104 INFO L175 Difference]: Start difference. First operand has 185 places, 246 transitions, 2702 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:16:09,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 286 transitions, 3714 flow [2024-06-27 21:16:09,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 286 transitions, 3658 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:09,412 INFO L231 Difference]: Finished difference. Result has 193 places, 258 transitions, 2994 flow [2024-06-27 21:16:09,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2994, PETRI_PLACES=193, PETRI_TRANSITIONS=258} [2024-06-27 21:16:09,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-27 21:16:09,413 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 258 transitions, 2994 flow [2024-06-27 21:16:09,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:09,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:09,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:16:09,414 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:09,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash 690580286, now seen corresponding path program 3 times [2024-06-27 21:16:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:09,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036770776] [2024-06-27 21:16:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036770776] [2024-06-27 21:16:11,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036770776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:11,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:11,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080673572] [2024-06-27 21:16:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:11,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:11,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:11,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 258 transitions, 2994 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:11,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:11,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:11,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:13,380 INFO L124 PetriNetUnfolderBase]: 3108/4972 cut-off events. [2024-06-27 21:16:13,380 INFO L125 PetriNetUnfolderBase]: For 249871/249871 co-relation queries the response was YES. [2024-06-27 21:16:13,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31700 conditions, 4972 events. 3108/4972 cut-off events. For 249871/249871 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29585 event pairs, 929 based on Foata normal form. 1/4965 useless extension candidates. Maximal degree in co-relation 31606. Up to 4135 conditions per place. [2024-06-27 21:16:13,419 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 86 changer transitions 0/289 dead transitions. [2024-06-27 21:16:13,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 289 transitions, 4014 flow [2024-06-27 21:16:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 21:16:13,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 21:16:13,434 INFO L175 Difference]: Start difference. First operand has 193 places, 258 transitions, 2994 flow. Second operand 7 states and 132 transitions. [2024-06-27 21:16:13,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 289 transitions, 4014 flow [2024-06-27 21:16:13,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 289 transitions, 3872 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:13,686 INFO L231 Difference]: Finished difference. Result has 195 places, 261 transitions, 3089 flow [2024-06-27 21:16:13,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3089, PETRI_PLACES=195, PETRI_TRANSITIONS=261} [2024-06-27 21:16:13,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 21:16:13,687 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 261 transitions, 3089 flow [2024-06-27 21:16:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:13,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:13,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:13,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:16:13,688 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:13,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 182842262, now seen corresponding path program 4 times [2024-06-27 21:16:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:13,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588349072] [2024-06-27 21:16:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588349072] [2024-06-27 21:16:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588349072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:16,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:16,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:16,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106654961] [2024-06-27 21:16:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:16,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:16,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:16,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:16,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 261 transitions, 3089 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:16,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:16,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:16,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:17,792 INFO L124 PetriNetUnfolderBase]: 3095/4942 cut-off events. [2024-06-27 21:16:17,792 INFO L125 PetriNetUnfolderBase]: For 259994/259994 co-relation queries the response was YES. [2024-06-27 21:16:17,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31856 conditions, 4942 events. 3095/4942 cut-off events. For 259994/259994 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29367 event pairs, 916 based on Foata normal form. 3/4937 useless extension candidates. Maximal degree in co-relation 31761. Up to 4128 conditions per place. [2024-06-27 21:16:17,835 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 197 selfloop transitions, 83 changer transitions 0/285 dead transitions. [2024-06-27 21:16:17,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 285 transitions, 3931 flow [2024-06-27 21:16:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:16:17,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:16:17,837 INFO L175 Difference]: Start difference. First operand has 195 places, 261 transitions, 3089 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:16:17,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 285 transitions, 3931 flow [2024-06-27 21:16:18,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 285 transitions, 3734 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:18,193 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 3066 flow [2024-06-27 21:16:18,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3066, PETRI_PLACES=198, PETRI_TRANSITIONS=261} [2024-06-27 21:16:18,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 21:16:18,194 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 3066 flow [2024-06-27 21:16:18,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:18,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:18,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:18,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:16:18,195 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:18,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash -495188872, now seen corresponding path program 5 times [2024-06-27 21:16:18,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:18,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643149847] [2024-06-27 21:16:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:18,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:20,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643149847] [2024-06-27 21:16:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643149847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:20,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:20,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136399448] [2024-06-27 21:16:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:20,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:20,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:20,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:20,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 261 transitions, 3066 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:20,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:20,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:20,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:22,243 INFO L124 PetriNetUnfolderBase]: 3086/4921 cut-off events. [2024-06-27 21:16:22,243 INFO L125 PetriNetUnfolderBase]: For 262870/262870 co-relation queries the response was YES. [2024-06-27 21:16:22,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31611 conditions, 4921 events. 3086/4921 cut-off events. For 262870/262870 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29121 event pairs, 767 based on Foata normal form. 3/4916 useless extension candidates. Maximal degree in co-relation 31516. Up to 4301 conditions per place. [2024-06-27 21:16:22,294 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 205 selfloop transitions, 74 changer transitions 0/284 dead transitions. [2024-06-27 21:16:22,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 284 transitions, 3938 flow [2024-06-27 21:16:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:16:22,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:16:22,296 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 3066 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:16:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 284 transitions, 3938 flow [2024-06-27 21:16:22,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 284 transitions, 3757 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:22,753 INFO L231 Difference]: Finished difference. Result has 201 places, 261 transitions, 3046 flow [2024-06-27 21:16:22,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=201, PETRI_TRANSITIONS=261} [2024-06-27 21:16:22,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 21:16:22,754 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 261 transitions, 3046 flow [2024-06-27 21:16:22,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:22,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:22,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:22,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:16:22,755 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:22,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2080120292, now seen corresponding path program 6 times [2024-06-27 21:16:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842826809] [2024-06-27 21:16:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:25,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:25,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842826809] [2024-06-27 21:16:25,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842826809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:25,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:25,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857324465] [2024-06-27 21:16:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:25,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:25,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:25,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:25,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 261 transitions, 3046 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:25,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:25,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:25,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:26,701 INFO L124 PetriNetUnfolderBase]: 3060/4881 cut-off events. [2024-06-27 21:16:26,702 INFO L125 PetriNetUnfolderBase]: For 266469/266469 co-relation queries the response was YES. [2024-06-27 21:16:26,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30988 conditions, 4881 events. 3060/4881 cut-off events. For 266469/266469 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28853 event pairs, 763 based on Foata normal form. 6/4879 useless extension candidates. Maximal degree in co-relation 30892. Up to 4287 conditions per place. [2024-06-27 21:16:26,746 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 76 changer transitions 0/288 dead transitions. [2024-06-27 21:16:26,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 288 transitions, 3950 flow [2024-06-27 21:16:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:16:26,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:16:26,756 INFO L175 Difference]: Start difference. First operand has 201 places, 261 transitions, 3046 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:16:26,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 288 transitions, 3950 flow [2024-06-27 21:16:27,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 288 transitions, 3732 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:16:27,177 INFO L231 Difference]: Finished difference. Result has 203 places, 261 transitions, 2992 flow [2024-06-27 21:16:27,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2992, PETRI_PLACES=203, PETRI_TRANSITIONS=261} [2024-06-27 21:16:27,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-27 21:16:27,178 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 261 transitions, 2992 flow [2024-06-27 21:16:27,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:27,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:27,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:27,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:16:27,179 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:27,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1887349675, now seen corresponding path program 1 times [2024-06-27 21:16:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:27,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813016411] [2024-06-27 21:16:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:27,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:29,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813016411] [2024-06-27 21:16:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813016411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669729896] [2024-06-27 21:16:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:29,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:29,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 261 transitions, 2992 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:29,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:29,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:29,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:31,177 INFO L124 PetriNetUnfolderBase]: 3156/5034 cut-off events. [2024-06-27 21:16:31,178 INFO L125 PetriNetUnfolderBase]: For 291325/291333 co-relation queries the response was YES. [2024-06-27 21:16:31,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32239 conditions, 5034 events. 3156/5034 cut-off events. For 291325/291333 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30044 event pairs, 860 based on Foata normal form. 16/5046 useless extension candidates. Maximal degree in co-relation 32142. Up to 4164 conditions per place. [2024-06-27 21:16:31,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 86 changer transitions 0/297 dead transitions. [2024-06-27 21:16:31,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 297 transitions, 4034 flow [2024-06-27 21:16:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:16:31,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 21:16:31,231 INFO L175 Difference]: Start difference. First operand has 203 places, 261 transitions, 2992 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:16:31,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 297 transitions, 4034 flow [2024-06-27 21:16:31,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 297 transitions, 3764 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:16:31,560 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 3079 flow [2024-06-27 21:16:31,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3079, PETRI_PLACES=201, PETRI_TRANSITIONS=271} [2024-06-27 21:16:31,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 21:16:31,561 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 3079 flow [2024-06-27 21:16:31,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:31,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:31,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:31,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:16:31,562 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:31,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1582288341, now seen corresponding path program 2 times [2024-06-27 21:16:31,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:31,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355432915] [2024-06-27 21:16:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:31,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:34,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355432915] [2024-06-27 21:16:34,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355432915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:34,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:34,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259870744] [2024-06-27 21:16:34,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:34,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:34,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 271 transitions, 3079 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:34,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:34,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:34,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:36,312 INFO L124 PetriNetUnfolderBase]: 3204/5102 cut-off events. [2024-06-27 21:16:36,313 INFO L125 PetriNetUnfolderBase]: For 301276/301276 co-relation queries the response was YES. [2024-06-27 21:16:36,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32968 conditions, 5102 events. 3204/5102 cut-off events. For 301276/301276 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30346 event pairs, 921 based on Foata normal form. 8/5102 useless extension candidates. Maximal degree in co-relation 32870. Up to 4196 conditions per place. [2024-06-27 21:16:36,366 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 94 changer transitions 0/303 dead transitions. [2024-06-27 21:16:36,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 303 transitions, 4055 flow [2024-06-27 21:16:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:16:36,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:16:36,367 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 3079 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:16:36,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 303 transitions, 4055 flow [2024-06-27 21:16:36,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 303 transitions, 3918 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 21:16:36,758 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3214 flow [2024-06-27 21:16:36,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3214, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-27 21:16:36,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-27 21:16:36,759 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3214 flow [2024-06-27 21:16:36,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:36,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:36,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:16:36,760 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1883336883, now seen corresponding path program 3 times [2024-06-27 21:16:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:36,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493193571] [2024-06-27 21:16:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:39,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:39,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493193571] [2024-06-27 21:16:39,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493193571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:39,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:39,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234298100] [2024-06-27 21:16:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:39,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:39,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3214 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:39,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:39,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:41,820 INFO L124 PetriNetUnfolderBase]: 3180/5068 cut-off events. [2024-06-27 21:16:41,821 INFO L125 PetriNetUnfolderBase]: For 300997/300997 co-relation queries the response was YES. [2024-06-27 21:16:41,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32345 conditions, 5068 events. 3180/5068 cut-off events. For 300997/300997 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30202 event pairs, 907 based on Foata normal form. 8/5068 useless extension candidates. Maximal degree in co-relation 32245. Up to 4184 conditions per place. [2024-06-27 21:16:41,869 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 100 changer transitions 0/308 dead transitions. [2024-06-27 21:16:41,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 308 transitions, 4140 flow [2024-06-27 21:16:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:16:41,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:16:41,871 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3214 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:16:41,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 308 transitions, 4140 flow [2024-06-27 21:16:42,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 308 transitions, 3889 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:42,331 INFO L231 Difference]: Finished difference. Result has 211 places, 275 transitions, 3170 flow [2024-06-27 21:16:42,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3170, PETRI_PLACES=211, PETRI_TRANSITIONS=275} [2024-06-27 21:16:42,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 21:16:42,332 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 275 transitions, 3170 flow [2024-06-27 21:16:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:42,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:42,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:42,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:16:42,333 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:42,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash -487822559, now seen corresponding path program 4 times [2024-06-27 21:16:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517127745] [2024-06-27 21:16:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:44,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517127745] [2024-06-27 21:16:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517127745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:44,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:44,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719643523] [2024-06-27 21:16:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:44,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:44,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 275 transitions, 3170 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:44,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:44,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:44,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:46,688 INFO L124 PetriNetUnfolderBase]: 3240/5147 cut-off events. [2024-06-27 21:16:46,688 INFO L125 PetriNetUnfolderBase]: For 316061/316061 co-relation queries the response was YES. [2024-06-27 21:16:46,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32787 conditions, 5147 events. 3240/5147 cut-off events. For 316061/316061 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30532 event pairs, 776 based on Foata normal form. 12/5151 useless extension candidates. Maximal degree in co-relation 32687. Up to 4497 conditions per place. [2024-06-27 21:16:46,730 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 91 changer transitions 0/307 dead transitions. [2024-06-27 21:16:46,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 307 transitions, 4177 flow [2024-06-27 21:16:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:16:46,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 21:16:46,731 INFO L175 Difference]: Start difference. First operand has 211 places, 275 transitions, 3170 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:16:46,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 307 transitions, 4177 flow [2024-06-27 21:16:47,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 307 transitions, 3917 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 21:16:47,175 INFO L231 Difference]: Finished difference. Result has 211 places, 282 transitions, 3208 flow [2024-06-27 21:16:47,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3208, PETRI_PLACES=211, PETRI_TRANSITIONS=282} [2024-06-27 21:16:47,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 21:16:47,176 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 282 transitions, 3208 flow [2024-06-27 21:16:47,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:47,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:47,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:47,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:16:47,177 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:47,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2086795615, now seen corresponding path program 5 times [2024-06-27 21:16:47,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:47,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332046717] [2024-06-27 21:16:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332046717] [2024-06-27 21:16:49,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332046717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:49,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:49,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:49,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038825631] [2024-06-27 21:16:49,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:49,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:49,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:49,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 282 transitions, 3208 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:49,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:49,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:51,326 INFO L124 PetriNetUnfolderBase]: 3220/5115 cut-off events. [2024-06-27 21:16:51,327 INFO L125 PetriNetUnfolderBase]: For 303886/303886 co-relation queries the response was YES. [2024-06-27 21:16:51,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 5115 events. 3220/5115 cut-off events. For 303886/303886 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30267 event pairs, 774 based on Foata normal form. 12/5119 useless extension candidates. Maximal degree in co-relation 31687. Up to 4493 conditions per place. [2024-06-27 21:16:51,377 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 216 selfloop transitions, 82 changer transitions 0/303 dead transitions. [2024-06-27 21:16:51,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 303 transitions, 3982 flow [2024-06-27 21:16:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:16:51,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:16:51,382 INFO L175 Difference]: Start difference. First operand has 211 places, 282 transitions, 3208 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:16:51,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 303 transitions, 3982 flow [2024-06-27 21:16:51,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 303 transitions, 3807 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:51,723 INFO L231 Difference]: Finished difference. Result has 213 places, 282 transitions, 3211 flow [2024-06-27 21:16:51,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3211, PETRI_PLACES=213, PETRI_TRANSITIONS=282} [2024-06-27 21:16:51,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-27 21:16:51,723 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 282 transitions, 3211 flow [2024-06-27 21:16:51,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:51,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:51,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:51,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:16:51,724 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:51,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1577125518, now seen corresponding path program 1 times [2024-06-27 21:16:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531499082] [2024-06-27 21:16:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:53,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531499082] [2024-06-27 21:16:53,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531499082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:53,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:53,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150526220] [2024-06-27 21:16:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:53,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:53,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 282 transitions, 3211 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:53,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:53,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:53,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:55,744 INFO L124 PetriNetUnfolderBase]: 3326/5304 cut-off events. [2024-06-27 21:16:55,744 INFO L125 PetriNetUnfolderBase]: For 318937/318941 co-relation queries the response was YES. [2024-06-27 21:16:55,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33574 conditions, 5304 events. 3326/5304 cut-off events. For 318937/318941 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31837 event pairs, 887 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 33473. Up to 4300 conditions per place. [2024-06-27 21:16:55,796 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 200 selfloop transitions, 121 changer transitions 0/326 dead transitions. [2024-06-27 21:16:55,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 326 transitions, 4346 flow [2024-06-27 21:16:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 21:16:55,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:16:55,798 INFO L175 Difference]: Start difference. First operand has 213 places, 282 transitions, 3211 flow. Second operand 7 states and 140 transitions. [2024-06-27 21:16:55,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 326 transitions, 4346 flow [2024-06-27 21:16:56,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 4078 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:16:56,179 INFO L231 Difference]: Finished difference. Result has 211 places, 293 transitions, 3344 flow [2024-06-27 21:16:56,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3344, PETRI_PLACES=211, PETRI_TRANSITIONS=293} [2024-06-27 21:16:56,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 21:16:56,180 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 293 transitions, 3344 flow [2024-06-27 21:16:56,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:56,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:56,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:16:56,181 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:56,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1152008516, now seen corresponding path program 2 times [2024-06-27 21:16:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:56,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077852019] [2024-06-27 21:16:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:58,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:58,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077852019] [2024-06-27 21:16:58,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077852019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:58,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:58,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:58,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386250203] [2024-06-27 21:16:58,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:58,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:58,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:58,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 293 transitions, 3344 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:58,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:58,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:58,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:00,490 INFO L124 PetriNetUnfolderBase]: 3336/5317 cut-off events. [2024-06-27 21:17:00,490 INFO L125 PetriNetUnfolderBase]: For 329107/329107 co-relation queries the response was YES. [2024-06-27 21:17:00,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33915 conditions, 5317 events. 3336/5317 cut-off events. For 329107/329107 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31851 event pairs, 892 based on Foata normal form. 2/5317 useless extension candidates. Maximal degree in co-relation 33814. Up to 4306 conditions per place. [2024-06-27 21:17:00,546 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 121 changer transitions 0/328 dead transitions. [2024-06-27 21:17:00,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 328 transitions, 4253 flow [2024-06-27 21:17:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:17:00,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:17:00,548 INFO L175 Difference]: Start difference. First operand has 211 places, 293 transitions, 3344 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:17:00,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 328 transitions, 4253 flow [2024-06-27 21:17:00,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 328 transitions, 4105 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:00,924 INFO L231 Difference]: Finished difference. Result has 216 places, 296 transitions, 3485 flow [2024-06-27 21:17:00,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3485, PETRI_PLACES=216, PETRI_TRANSITIONS=296} [2024-06-27 21:17:00,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 21:17:00,925 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 296 transitions, 3485 flow [2024-06-27 21:17:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:00,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:00,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:17:00,926 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:00,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash 141031008, now seen corresponding path program 3 times [2024-06-27 21:17:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:00,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786151968] [2024-06-27 21:17:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786151968] [2024-06-27 21:17:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786151968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:03,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:03,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:03,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120999696] [2024-06-27 21:17:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:03,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:03,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:03,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:03,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 296 transitions, 3485 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:03,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:03,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:03,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:04,953 INFO L124 PetriNetUnfolderBase]: 3324/5280 cut-off events. [2024-06-27 21:17:04,953 INFO L125 PetriNetUnfolderBase]: For 336445/336445 co-relation queries the response was YES. [2024-06-27 21:17:04,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33856 conditions, 5280 events. 3324/5280 cut-off events. For 336445/336445 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31431 event pairs, 837 based on Foata normal form. 4/5283 useless extension candidates. Maximal degree in co-relation 33754. Up to 4961 conditions per place. [2024-06-27 21:17:05,005 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 45 changer transitions 0/321 dead transitions. [2024-06-27 21:17:05,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 4209 flow [2024-06-27 21:17:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:17:05,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 21:17:05,007 INFO L175 Difference]: Start difference. First operand has 216 places, 296 transitions, 3485 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:17:05,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 4209 flow [2024-06-27 21:17:05,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 321 transitions, 3945 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:05,351 INFO L231 Difference]: Finished difference. Result has 218 places, 296 transitions, 3323 flow [2024-06-27 21:17:05,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3323, PETRI_PLACES=218, PETRI_TRANSITIONS=296} [2024-06-27 21:17:05,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 21:17:05,351 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 296 transitions, 3323 flow [2024-06-27 21:17:05,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:05,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:05,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:05,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:17:05,352 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:05,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash 989359712, now seen corresponding path program 4 times [2024-06-27 21:17:05,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:05,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319006618] [2024-06-27 21:17:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:05,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:07,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:07,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319006618] [2024-06-27 21:17:07,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319006618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:07,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:07,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193774312] [2024-06-27 21:17:07,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:07,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:07,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 296 transitions, 3323 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:07,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:07,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:07,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:09,945 INFO L124 PetriNetUnfolderBase]: 3334/5306 cut-off events. [2024-06-27 21:17:09,946 INFO L125 PetriNetUnfolderBase]: For 340659/340659 co-relation queries the response was YES. [2024-06-27 21:17:09,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33515 conditions, 5306 events. 3334/5306 cut-off events. For 340659/340659 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31683 event pairs, 1009 based on Foata normal form. 2/5300 useless extension candidates. Maximal degree in co-relation 33412. Up to 4301 conditions per place. [2024-06-27 21:17:09,992 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 113 changer transitions 0/327 dead transitions. [2024-06-27 21:17:09,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 327 transitions, 4219 flow [2024-06-27 21:17:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:17:09,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 21:17:09,993 INFO L175 Difference]: Start difference. First operand has 218 places, 296 transitions, 3323 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:17:09,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 327 transitions, 4219 flow [2024-06-27 21:17:10,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 327 transitions, 4129 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:10,419 INFO L231 Difference]: Finished difference. Result has 219 places, 299 transitions, 3505 flow [2024-06-27 21:17:10,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=219, PETRI_TRANSITIONS=299} [2024-06-27 21:17:10,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-27 21:17:10,420 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 299 transitions, 3505 flow [2024-06-27 21:17:10,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:10,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:10,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:17:10,421 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:10,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:10,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1976941768, now seen corresponding path program 5 times [2024-06-27 21:17:10,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:10,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154747950] [2024-06-27 21:17:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154747950] [2024-06-27 21:17:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154747950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:12,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:12,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267188107] [2024-06-27 21:17:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:12,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:12,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:12,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 299 transitions, 3505 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:12,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:12,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:14,284 INFO L124 PetriNetUnfolderBase]: 3344/5326 cut-off events. [2024-06-27 21:17:14,284 INFO L125 PetriNetUnfolderBase]: For 354072/354080 co-relation queries the response was YES. [2024-06-27 21:17:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34304 conditions, 5326 events. 3344/5326 cut-off events. For 354072/354080 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31908 event pairs, 870 based on Foata normal form. 10/5332 useless extension candidates. Maximal degree in co-relation 34200. Up to 4307 conditions per place. [2024-06-27 21:17:14,340 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 112 changer transitions 0/331 dead transitions. [2024-06-27 21:17:14,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 331 transitions, 4545 flow [2024-06-27 21:17:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:17:14,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:17:14,341 INFO L175 Difference]: Start difference. First operand has 219 places, 299 transitions, 3505 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:17:14,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 331 transitions, 4545 flow [2024-06-27 21:17:14,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 331 transitions, 4392 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:14,837 INFO L231 Difference]: Finished difference. Result has 221 places, 302 transitions, 3625 flow [2024-06-27 21:17:14,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3625, PETRI_PLACES=221, PETRI_TRANSITIONS=302} [2024-06-27 21:17:14,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 21:17:14,838 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 302 transitions, 3625 flow [2024-06-27 21:17:14,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:14,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:14,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:14,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:17:14,838 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:14,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:14,839 INFO L85 PathProgramCache]: Analyzing trace with hash -326759494, now seen corresponding path program 6 times [2024-06-27 21:17:14,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:14,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213532358] [2024-06-27 21:17:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:14,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:17,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213532358] [2024-06-27 21:17:17,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213532358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:17,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292885176] [2024-06-27 21:17:17,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:17,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:17,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:17,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 302 transitions, 3625 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:17,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:17,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:17,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:19,159 INFO L124 PetriNetUnfolderBase]: 3318/5290 cut-off events. [2024-06-27 21:17:19,159 INFO L125 PetriNetUnfolderBase]: For 362578/362586 co-relation queries the response was YES. [2024-06-27 21:17:19,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33970 conditions, 5290 events. 3318/5290 cut-off events. For 362578/362586 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31759 event pairs, 884 based on Foata normal form. 14/5300 useless extension candidates. Maximal degree in co-relation 33864. Up to 4288 conditions per place. [2024-06-27 21:17:19,207 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 106 changer transitions 0/327 dead transitions. [2024-06-27 21:17:19,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 4475 flow [2024-06-27 21:17:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:17:19,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:17:19,209 INFO L175 Difference]: Start difference. First operand has 221 places, 302 transitions, 3625 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:17:19,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 4475 flow [2024-06-27 21:17:19,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 327 transitions, 4335 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:19,597 INFO L231 Difference]: Finished difference. Result has 225 places, 302 transitions, 3705 flow [2024-06-27 21:17:19,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3705, PETRI_PLACES=225, PETRI_TRANSITIONS=302} [2024-06-27 21:17:19,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-27 21:17:19,605 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 302 transitions, 3705 flow [2024-06-27 21:17:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:19,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:19,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:19,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:17:19,605 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:19,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:19,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1806018588, now seen corresponding path program 7 times [2024-06-27 21:17:19,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:19,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839859353] [2024-06-27 21:17:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:19,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:22,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:22,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839859353] [2024-06-27 21:17:22,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839859353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:22,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:22,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304731307] [2024-06-27 21:17:22,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:22,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:22,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:22,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 302 transitions, 3705 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:24,982 INFO L124 PetriNetUnfolderBase]: 3300/5264 cut-off events. [2024-06-27 21:17:24,983 INFO L125 PetriNetUnfolderBase]: For 361779/361779 co-relation queries the response was YES. [2024-06-27 21:17:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33683 conditions, 5264 events. 3300/5264 cut-off events. For 361779/361779 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31517 event pairs, 948 based on Foata normal form. 6/5262 useless extension candidates. Maximal degree in co-relation 33576. Up to 4277 conditions per place. [2024-06-27 21:17:25,028 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 116 changer transitions 0/335 dead transitions. [2024-06-27 21:17:25,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 4721 flow [2024-06-27 21:17:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:17:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:17:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:17:25,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:17:25,030 INFO L175 Difference]: Start difference. First operand has 225 places, 302 transitions, 3705 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:17:25,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 4721 flow [2024-06-27 21:17:25,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 335 transitions, 4561 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:25,511 INFO L231 Difference]: Finished difference. Result has 230 places, 302 transitions, 3784 flow [2024-06-27 21:17:25,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3545, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3784, PETRI_PLACES=230, PETRI_TRANSITIONS=302} [2024-06-27 21:17:25,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 21:17:25,512 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 302 transitions, 3784 flow [2024-06-27 21:17:25,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:25,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:25,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:25,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:17:25,512 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:25,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1373411582, now seen corresponding path program 8 times [2024-06-27 21:17:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:25,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426816844] [2024-06-27 21:17:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:25,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:28,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:28,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426816844] [2024-06-27 21:17:28,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426816844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:28,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:28,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:28,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100914511] [2024-06-27 21:17:28,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:28,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:28,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:28,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:28,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 302 transitions, 3784 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:28,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:28,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:28,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:30,373 INFO L124 PetriNetUnfolderBase]: 3274/5226 cut-off events. [2024-06-27 21:17:30,373 INFO L125 PetriNetUnfolderBase]: For 360419/360419 co-relation queries the response was YES. [2024-06-27 21:17:30,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33350 conditions, 5226 events. 3274/5226 cut-off events. For 360419/360419 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31303 event pairs, 948 based on Foata normal form. 6/5224 useless extension candidates. Maximal degree in co-relation 33242. Up to 4258 conditions per place. [2024-06-27 21:17:30,429 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 212 selfloop transitions, 112 changer transitions 0/329 dead transitions. [2024-06-27 21:17:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 329 transitions, 4646 flow [2024-06-27 21:17:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:17:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:17:30,431 INFO L175 Difference]: Start difference. First operand has 230 places, 302 transitions, 3784 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:17:30,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 329 transitions, 4646 flow [2024-06-27 21:17:30,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4305 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:30,991 INFO L231 Difference]: Finished difference. Result has 229 places, 302 transitions, 3676 flow [2024-06-27 21:17:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=229, PETRI_TRANSITIONS=302} [2024-06-27 21:17:30,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-27 21:17:30,992 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 302 transitions, 3676 flow [2024-06-27 21:17:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:30,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:17:30,992 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:30,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1829282908, now seen corresponding path program 9 times [2024-06-27 21:17:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133866761] [2024-06-27 21:17:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:33,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:33,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133866761] [2024-06-27 21:17:33,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133866761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:33,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:33,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:33,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734657973] [2024-06-27 21:17:33,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:33,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:33,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:33,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:34,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:34,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 302 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:34,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:34,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:34,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:35,513 INFO L124 PetriNetUnfolderBase]: 3256/5187 cut-off events. [2024-06-27 21:17:35,513 INFO L125 PetriNetUnfolderBase]: For 350917/350917 co-relation queries the response was YES. [2024-06-27 21:17:35,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32746 conditions, 5187 events. 3256/5187 cut-off events. For 350917/350917 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30932 event pairs, 782 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 32638. Up to 4535 conditions per place. [2024-06-27 21:17:35,569 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 83 changer transitions 0/323 dead transitions. [2024-06-27 21:17:35,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 323 transitions, 4508 flow [2024-06-27 21:17:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:17:35,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:17:35,571 INFO L175 Difference]: Start difference. First operand has 229 places, 302 transitions, 3676 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:17:35,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 323 transitions, 4508 flow [2024-06-27 21:17:36,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 323 transitions, 4337 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:36,152 INFO L231 Difference]: Finished difference. Result has 231 places, 302 transitions, 3680 flow [2024-06-27 21:17:36,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3680, PETRI_PLACES=231, PETRI_TRANSITIONS=302} [2024-06-27 21:17:36,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-27 21:17:36,153 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 302 transitions, 3680 flow [2024-06-27 21:17:36,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:36,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:36,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:36,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:17:36,153 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:36,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash 59221458, now seen corresponding path program 10 times [2024-06-27 21:17:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339004246] [2024-06-27 21:17:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:38,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:38,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339004246] [2024-06-27 21:17:38,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339004246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:38,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:38,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:38,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850436090] [2024-06-27 21:17:38,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:38,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:38,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:38,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:38,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 302 transitions, 3680 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:38,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:38,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:38,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:40,340 INFO L124 PetriNetUnfolderBase]: 3204/5119 cut-off events. [2024-06-27 21:17:40,340 INFO L125 PetriNetUnfolderBase]: For 345620/345620 co-relation queries the response was YES. [2024-06-27 21:17:40,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31469 conditions, 5119 events. 3204/5119 cut-off events. For 345620/345620 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30572 event pairs, 768 based on Foata normal form. 12/5123 useless extension candidates. Maximal degree in co-relation 31359. Up to 4497 conditions per place. [2024-06-27 21:17:40,395 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 88 changer transitions 0/326 dead transitions. [2024-06-27 21:17:40,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 4401 flow [2024-06-27 21:17:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:17:40,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 21:17:40,397 INFO L175 Difference]: Start difference. First operand has 231 places, 302 transitions, 3680 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:17:40,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 4401 flow [2024-06-27 21:17:40,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 326 transitions, 4175 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:40,933 INFO L231 Difference]: Finished difference. Result has 233 places, 302 transitions, 3643 flow [2024-06-27 21:17:40,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3643, PETRI_PLACES=233, PETRI_TRANSITIONS=302} [2024-06-27 21:17:40,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-27 21:17:40,934 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 302 transitions, 3643 flow [2024-06-27 21:17:40,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:40,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:40,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:40,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:17:40,935 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:40,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash 34265176, now seen corresponding path program 1 times [2024-06-27 21:17:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:40,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089632451] [2024-06-27 21:17:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:44,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:44,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089632451] [2024-06-27 21:17:44,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089632451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:44,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:44,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:44,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834872753] [2024-06-27 21:17:44,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:44,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:44,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:44,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:44,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:44,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 302 transitions, 3643 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:44,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:44,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:44,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:46,021 INFO L124 PetriNetUnfolderBase]: 3256/5207 cut-off events. [2024-06-27 21:17:46,021 INFO L125 PetriNetUnfolderBase]: For 358383/358383 co-relation queries the response was YES. [2024-06-27 21:17:46,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31923 conditions, 5207 events. 3256/5207 cut-off events. For 358383/358383 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31280 event pairs, 784 based on Foata normal form. 14/5213 useless extension candidates. Maximal degree in co-relation 31812. Up to 4837 conditions per place. [2024-06-27 21:17:46,075 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 288 selfloop transitions, 33 changer transitions 0/326 dead transitions. [2024-06-27 21:17:46,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 4410 flow [2024-06-27 21:17:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:17:46,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:17:46,077 INFO L175 Difference]: Start difference. First operand has 233 places, 302 transitions, 3643 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:17:46,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 4410 flow [2024-06-27 21:17:46,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 326 transitions, 4086 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:17:46,568 INFO L231 Difference]: Finished difference. Result has 229 places, 304 transitions, 3425 flow [2024-06-27 21:17:46,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3425, PETRI_PLACES=229, PETRI_TRANSITIONS=304} [2024-06-27 21:17:46,568 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-27 21:17:46,569 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 304 transitions, 3425 flow [2024-06-27 21:17:46,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:46,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:46,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:17:46,569 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:46,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 34770166, now seen corresponding path program 2 times [2024-06-27 21:17:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:46,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954012593] [2024-06-27 21:17:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954012593] [2024-06-27 21:17:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954012593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:49,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:49,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805201631] [2024-06-27 21:17:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:49,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:49,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:49,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 304 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:49,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:49,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:49,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:51,540 INFO L124 PetriNetUnfolderBase]: 3317/5298 cut-off events. [2024-06-27 21:17:51,541 INFO L125 PetriNetUnfolderBase]: For 363909/363909 co-relation queries the response was YES. [2024-06-27 21:17:51,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 5298 events. 3317/5298 cut-off events. For 363909/363909 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31820 event pairs, 801 based on Foata normal form. 8/5298 useless extension candidates. Maximal degree in co-relation 32522. Up to 4777 conditions per place. [2024-06-27 21:17:51,594 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 295 selfloop transitions, 32 changer transitions 0/332 dead transitions. [2024-06-27 21:17:51,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 332 transitions, 4375 flow [2024-06-27 21:17:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:17:51,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-27 21:17:51,596 INFO L175 Difference]: Start difference. First operand has 229 places, 304 transitions, 3425 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:17:51,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 332 transitions, 4375 flow [2024-06-27 21:17:52,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 4294 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:52,306 INFO L231 Difference]: Finished difference. Result has 231 places, 306 transitions, 3446 flow [2024-06-27 21:17:52,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3446, PETRI_PLACES=231, PETRI_TRANSITIONS=306} [2024-06-27 21:17:52,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-27 21:17:52,307 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 306 transitions, 3446 flow [2024-06-27 21:17:52,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:52,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:52,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:52,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:17:52,308 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:52,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1258012222, now seen corresponding path program 1 times [2024-06-27 21:17:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:52,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295017173] [2024-06-27 21:17:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:55,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:55,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295017173] [2024-06-27 21:17:55,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295017173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:55,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:55,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:55,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362685664] [2024-06-27 21:17:55,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:55,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:55,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:55,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 306 transitions, 3446 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:55,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:56,860 INFO L124 PetriNetUnfolderBase]: 3325/5337 cut-off events. [2024-06-27 21:17:56,860 INFO L125 PetriNetUnfolderBase]: For 359514/359516 co-relation queries the response was YES. [2024-06-27 21:17:56,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32860 conditions, 5337 events. 3325/5337 cut-off events. For 359514/359516 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32301 event pairs, 865 based on Foata normal form. 4/5340 useless extension candidates. Maximal degree in co-relation 32748. Up to 5020 conditions per place. [2024-06-27 21:17:56,910 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 299 selfloop transitions, 30 changer transitions 0/334 dead transitions. [2024-06-27 21:17:56,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 334 transitions, 4398 flow [2024-06-27 21:17:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:17:56,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:17:56,912 INFO L175 Difference]: Start difference. First operand has 231 places, 306 transitions, 3446 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:17:56,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 334 transitions, 4398 flow [2024-06-27 21:17:57,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 334 transitions, 4355 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:57,414 INFO L231 Difference]: Finished difference. Result has 235 places, 310 transitions, 3544 flow [2024-06-27 21:17:57,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3403, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3544, PETRI_PLACES=235, PETRI_TRANSITIONS=310} [2024-06-27 21:17:57,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-27 21:17:57,415 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 310 transitions, 3544 flow [2024-06-27 21:17:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:57,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:57,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:17:57,416 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash -329546084, now seen corresponding path program 2 times [2024-06-27 21:17:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:57,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4554687] [2024-06-27 21:17:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:00,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4554687] [2024-06-27 21:18:00,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4554687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:00,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:00,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721214675] [2024-06-27 21:18:00,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:00,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:00,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:00,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 310 transitions, 3544 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:00,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:00,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:00,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:02,108 INFO L124 PetriNetUnfolderBase]: 3333/5337 cut-off events. [2024-06-27 21:18:02,109 INFO L125 PetriNetUnfolderBase]: For 369456/369458 co-relation queries the response was YES. [2024-06-27 21:18:02,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33218 conditions, 5337 events. 3333/5337 cut-off events. For 369456/369458 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32229 event pairs, 901 based on Foata normal form. 4/5340 useless extension candidates. Maximal degree in co-relation 33104. Up to 5069 conditions per place. [2024-06-27 21:18:02,155 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 299 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-27 21:18:02,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 331 transitions, 4296 flow [2024-06-27 21:18:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:18:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:18:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 21:18:02,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 21:18:02,157 INFO L175 Difference]: Start difference. First operand has 235 places, 310 transitions, 3544 flow. Second operand 7 states and 117 transitions. [2024-06-27 21:18:02,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 331 transitions, 4296 flow [2024-06-27 21:18:02,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 331 transitions, 4204 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 21:18:02,734 INFO L231 Difference]: Finished difference. Result has 239 places, 312 transitions, 3555 flow [2024-06-27 21:18:02,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3555, PETRI_PLACES=239, PETRI_TRANSITIONS=312} [2024-06-27 21:18:02,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-27 21:18:02,735 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 312 transitions, 3555 flow [2024-06-27 21:18:02,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:02,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:02,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:02,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:18:02,735 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:02,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1806295418, now seen corresponding path program 3 times [2024-06-27 21:18:02,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:02,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786112460] [2024-06-27 21:18:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:02,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:06,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786112460] [2024-06-27 21:18:06,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786112460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:06,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010391862] [2024-06-27 21:18:06,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:06,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:06,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 312 transitions, 3555 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:06,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:06,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:06,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:08,091 INFO L124 PetriNetUnfolderBase]: 3341/5347 cut-off events. [2024-06-27 21:18:08,091 INFO L125 PetriNetUnfolderBase]: For 378899/378899 co-relation queries the response was YES. [2024-06-27 21:18:08,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33381 conditions, 5347 events. 3341/5347 cut-off events. For 378899/378899 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32322 event pairs, 916 based on Foata normal form. 2/5347 useless extension candidates. Maximal degree in co-relation 33265. Up to 5081 conditions per place. [2024-06-27 21:18:08,149 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 300 selfloop transitions, 29 changer transitions 0/334 dead transitions. [2024-06-27 21:18:08,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 334 transitions, 4303 flow [2024-06-27 21:18:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:18:08,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:18:08,151 INFO L175 Difference]: Start difference. First operand has 239 places, 312 transitions, 3555 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:18:08,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 334 transitions, 4303 flow [2024-06-27 21:18:08,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 334 transitions, 4236 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:08,851 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 3583 flow [2024-06-27 21:18:08,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3583, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-27 21:18:08,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-27 21:18:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 3583 flow [2024-06-27 21:18:08,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:08,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:08,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:08,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:18:08,852 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:08,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1373606200, now seen corresponding path program 1 times [2024-06-27 21:18:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:08,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013679738] [2024-06-27 21:18:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013679738] [2024-06-27 21:18:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013679738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:12,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362204403] [2024-06-27 21:18:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:12,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 3583 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:12,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:12,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:13,910 INFO L124 PetriNetUnfolderBase]: 3357/5363 cut-off events. [2024-06-27 21:18:13,910 INFO L125 PetriNetUnfolderBase]: For 395173/395173 co-relation queries the response was YES. [2024-06-27 21:18:13,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33713 conditions, 5363 events. 3357/5363 cut-off events. For 395173/395173 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32305 event pairs, 1006 based on Foata normal form. 4/5358 useless extension candidates. Maximal degree in co-relation 33596. Up to 4415 conditions per place. [2024-06-27 21:18:13,966 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 116 changer transitions 0/341 dead transitions. [2024-06-27 21:18:13,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 341 transitions, 4391 flow [2024-06-27 21:18:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:18:13,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:18:13,969 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 3583 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:18:13,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 341 transitions, 4391 flow [2024-06-27 21:18:14,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4316 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:14,694 INFO L231 Difference]: Finished difference. Result has 244 places, 317 transitions, 3814 flow [2024-06-27 21:18:14,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3814, PETRI_PLACES=244, PETRI_TRANSITIONS=317} [2024-06-27 21:18:14,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-27 21:18:14,695 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 317 transitions, 3814 flow [2024-06-27 21:18:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:14,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:14,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:14,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:18:14,695 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:14,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1829292828, now seen corresponding path program 4 times [2024-06-27 21:18:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831412371] [2024-06-27 21:18:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831412371] [2024-06-27 21:18:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831412371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:17,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:17,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242989863] [2024-06-27 21:18:17,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:17,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:17,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:17,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 317 transitions, 3814 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:17,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:17,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:17,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:19,311 INFO L124 PetriNetUnfolderBase]: 3352/5353 cut-off events. [2024-06-27 21:18:19,311 INFO L125 PetriNetUnfolderBase]: For 396732/396732 co-relation queries the response was YES. [2024-06-27 21:18:19,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34293 conditions, 5353 events. 3352/5353 cut-off events. For 396732/396732 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32340 event pairs, 956 based on Foata normal form. 2/5354 useless extension candidates. Maximal degree in co-relation 34175. Up to 5148 conditions per place. [2024-06-27 21:18:19,372 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 311 selfloop transitions, 16 changer transitions 0/332 dead transitions. [2024-06-27 21:18:19,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 332 transitions, 4512 flow [2024-06-27 21:18:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:18:19,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-27 21:18:19,374 INFO L175 Difference]: Start difference. First operand has 244 places, 317 transitions, 3814 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:18:19,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 332 transitions, 4512 flow [2024-06-27 21:18:20,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 332 transitions, 4214 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:20,115 INFO L231 Difference]: Finished difference. Result has 246 places, 317 transitions, 3553 flow [2024-06-27 21:18:20,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3553, PETRI_PLACES=246, PETRI_TRANSITIONS=317} [2024-06-27 21:18:20,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-27 21:18:20,116 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 317 transitions, 3553 flow [2024-06-27 21:18:20,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:20,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:20,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:20,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:18:20,117 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:20,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash 494237576, now seen corresponding path program 2 times [2024-06-27 21:18:20,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:20,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371727326] [2024-06-27 21:18:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:23,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371727326] [2024-06-27 21:18:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371727326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:23,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168791496] [2024-06-27 21:18:23,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:23,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:23,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:23,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:23,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 317 transitions, 3553 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:23,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:23,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:23,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:25,640 INFO L124 PetriNetUnfolderBase]: 3404/5413 cut-off events. [2024-06-27 21:18:25,641 INFO L125 PetriNetUnfolderBase]: For 440907/440907 co-relation queries the response was YES. [2024-06-27 21:18:25,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34319 conditions, 5413 events. 3404/5413 cut-off events. For 440907/440907 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32474 event pairs, 794 based on Foata normal form. 14/5419 useless extension candidates. Maximal degree in co-relation 34200. Up to 4751 conditions per place. [2024-06-27 21:18:25,704 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 96 changer transitions 0/348 dead transitions. [2024-06-27 21:18:25,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4395 flow [2024-06-27 21:18:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:18:25,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:18:25,705 INFO L175 Difference]: Start difference. First operand has 246 places, 317 transitions, 3553 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:18:25,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4395 flow [2024-06-27 21:18:26,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 348 transitions, 4344 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:26,468 INFO L231 Difference]: Finished difference. Result has 249 places, 320 transitions, 3776 flow [2024-06-27 21:18:26,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3776, PETRI_PLACES=249, PETRI_TRANSITIONS=320} [2024-06-27 21:18:26,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 21:18:26,469 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 320 transitions, 3776 flow [2024-06-27 21:18:26,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:26,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:26,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:26,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:18:26,469 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:26,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash 34777110, now seen corresponding path program 3 times [2024-06-27 21:18:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736669433] [2024-06-27 21:18:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:30,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:30,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736669433] [2024-06-27 21:18:30,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736669433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:30,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:30,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:30,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970042139] [2024-06-27 21:18:30,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:30,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:30,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:30,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:30,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 320 transitions, 3776 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:30,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:32,243 INFO L124 PetriNetUnfolderBase]: 3924/6227 cut-off events. [2024-06-27 21:18:32,243 INFO L125 PetriNetUnfolderBase]: For 706068/706068 co-relation queries the response was YES. [2024-06-27 21:18:32,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 6227 events. 3924/6227 cut-off events. For 706068/706068 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37629 event pairs, 968 based on Foata normal form. 14/6233 useless extension candidates. Maximal degree in co-relation 45054. Up to 4672 conditions per place. [2024-06-27 21:18:32,317 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 258 selfloop transitions, 100 changer transitions 0/363 dead transitions. [2024-06-27 21:18:32,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 363 transitions, 4930 flow [2024-06-27 21:18:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:18:32,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-27 21:18:32,319 INFO L175 Difference]: Start difference. First operand has 249 places, 320 transitions, 3776 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:18:32,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 363 transitions, 4930 flow [2024-06-27 21:18:33,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 363 transitions, 4688 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 21:18:33,339 INFO L231 Difference]: Finished difference. Result has 252 places, 326 transitions, 3898 flow [2024-06-27 21:18:33,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3898, PETRI_PLACES=252, PETRI_TRANSITIONS=326} [2024-06-27 21:18:33,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-27 21:18:33,340 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 326 transitions, 3898 flow [2024-06-27 21:18:33,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:33,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:33,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:33,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:18:33,341 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:33,341 INFO L85 PathProgramCache]: Analyzing trace with hash -201694920, now seen corresponding path program 4 times [2024-06-27 21:18:33,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:33,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159206030] [2024-06-27 21:18:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:33,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159206030] [2024-06-27 21:18:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159206030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:36,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:36,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649922279] [2024-06-27 21:18:36,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:36,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:36,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:36,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 326 transitions, 3898 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:36,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:36,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:36,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:38,279 INFO L124 PetriNetUnfolderBase]: 3891/6176 cut-off events. [2024-06-27 21:18:38,280 INFO L125 PetriNetUnfolderBase]: For 672485/672485 co-relation queries the response was YES. [2024-06-27 21:18:38,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43920 conditions, 6176 events. 3891/6176 cut-off events. For 672485/672485 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37368 event pairs, 1017 based on Foata normal form. 14/6182 useless extension candidates. Maximal degree in co-relation 43798. Up to 5504 conditions per place. [2024-06-27 21:18:38,354 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 260 selfloop transitions, 89 changer transitions 0/354 dead transitions. [2024-06-27 21:18:38,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 354 transitions, 4760 flow [2024-06-27 21:18:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:18:38,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 21:18:38,356 INFO L175 Difference]: Start difference. First operand has 252 places, 326 transitions, 3898 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:18:38,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 354 transitions, 4760 flow [2024-06-27 21:18:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 354 transitions, 4564 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:39,487 INFO L231 Difference]: Finished difference. Result has 255 places, 329 transitions, 3976 flow [2024-06-27 21:18:39,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3976, PETRI_PLACES=255, PETRI_TRANSITIONS=329} [2024-06-27 21:18:39,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-27 21:18:39,487 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 329 transitions, 3976 flow [2024-06-27 21:18:39,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:39,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:39,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:39,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:18:39,488 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:39,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash 873823609, now seen corresponding path program 1 times [2024-06-27 21:18:39,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:39,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449781632] [2024-06-27 21:18:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:39,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:42,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:42,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449781632] [2024-06-27 21:18:42,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449781632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:42,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584037909] [2024-06-27 21:18:42,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:42,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:42,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:42,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:42,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 329 transitions, 3976 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:42,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:42,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:42,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:44,688 INFO L124 PetriNetUnfolderBase]: 3906/6224 cut-off events. [2024-06-27 21:18:44,688 INFO L125 PetriNetUnfolderBase]: For 650008/650008 co-relation queries the response was YES. [2024-06-27 21:18:44,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43969 conditions, 6224 events. 3906/6224 cut-off events. For 650008/650008 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37930 event pairs, 958 based on Foata normal form. 2/6225 useless extension candidates. Maximal degree in co-relation 43845. Up to 5764 conditions per place. [2024-06-27 21:18:44,765 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 42 changer transitions 0/376 dead transitions. [2024-06-27 21:18:44,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 376 transitions, 5104 flow [2024-06-27 21:18:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:18:44,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 21:18:44,768 INFO L175 Difference]: Start difference. First operand has 255 places, 329 transitions, 3976 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:18:44,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 376 transitions, 5104 flow [2024-06-27 21:18:45,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 4872 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:45,810 INFO L231 Difference]: Finished difference. Result has 257 places, 334 transitions, 3937 flow [2024-06-27 21:18:45,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3937, PETRI_PLACES=257, PETRI_TRANSITIONS=334} [2024-06-27 21:18:45,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 21:18:45,810 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 334 transitions, 3937 flow [2024-06-27 21:18:45,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:45,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:45,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:45,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:18:45,812 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:45,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash -176028601, now seen corresponding path program 2 times [2024-06-27 21:18:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:45,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949030422] [2024-06-27 21:18:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:49,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:49,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949030422] [2024-06-27 21:18:49,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949030422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:49,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:49,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:49,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483410802] [2024-06-27 21:18:49,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:49,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:49,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:49,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 334 transitions, 3937 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:49,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:49,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:49,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:51,701 INFO L124 PetriNetUnfolderBase]: 3919/6245 cut-off events. [2024-06-27 21:18:51,702 INFO L125 PetriNetUnfolderBase]: For 661619/661619 co-relation queries the response was YES. [2024-06-27 21:18:51,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43825 conditions, 6245 events. 3919/6245 cut-off events. For 661619/661619 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38190 event pairs, 1115 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 43699. Up to 5911 conditions per place. [2024-06-27 21:18:51,763 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 39 changer transitions 0/371 dead transitions. [2024-06-27 21:18:51,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 4851 flow [2024-06-27 21:18:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:18:51,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:18:51,765 INFO L175 Difference]: Start difference. First operand has 257 places, 334 transitions, 3937 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:18:51,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 4851 flow [2024-06-27 21:18:52,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 4662 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:18:52,795 INFO L231 Difference]: Finished difference. Result has 261 places, 339 transitions, 3915 flow [2024-06-27 21:18:52,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=261, PETRI_TRANSITIONS=339} [2024-06-27 21:18:52,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 21:18:52,796 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 339 transitions, 3915 flow [2024-06-27 21:18:52,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:52,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:52,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:52,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:18:52,797 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:52,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1410526763, now seen corresponding path program 1 times [2024-06-27 21:18:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:52,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140238786] [2024-06-27 21:18:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:55,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:55,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140238786] [2024-06-27 21:18:55,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140238786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:55,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:55,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954186664] [2024-06-27 21:18:55,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:55,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:55,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:55,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 339 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:55,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:55,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:55,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:57,978 INFO L124 PetriNetUnfolderBase]: 3940/6279 cut-off events. [2024-06-27 21:18:57,978 INFO L125 PetriNetUnfolderBase]: For 679780/679780 co-relation queries the response was YES. [2024-06-27 21:18:58,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44176 conditions, 6279 events. 3940/6279 cut-off events. For 679780/679780 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38421 event pairs, 1085 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 44049. Up to 5814 conditions per place. [2024-06-27 21:18:58,045 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 321 selfloop transitions, 64 changer transitions 0/390 dead transitions. [2024-06-27 21:18:58,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 390 transitions, 5098 flow [2024-06-27 21:18:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:18:58,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 21:18:58,047 INFO L175 Difference]: Start difference. First operand has 261 places, 339 transitions, 3915 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:18:58,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 390 transitions, 5098 flow [2024-06-27 21:18:59,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 390 transitions, 5009 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:59,066 INFO L231 Difference]: Finished difference. Result has 266 places, 345 transitions, 4089 flow [2024-06-27 21:18:59,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4089, PETRI_PLACES=266, PETRI_TRANSITIONS=345} [2024-06-27 21:18:59,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 21:18:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 345 transitions, 4089 flow [2024-06-27 21:18:59,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:59,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:59,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:18:59,067 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:59,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash 72224309, now seen corresponding path program 3 times [2024-06-27 21:18:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319886158] [2024-06-27 21:18:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319886158] [2024-06-27 21:19:02,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319886158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:02,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:02,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:02,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926418348] [2024-06-27 21:19:02,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:02,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:02,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:02,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:02,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:02,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 345 transitions, 4089 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:02,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:02,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:02,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:04,489 INFO L124 PetriNetUnfolderBase]: 3935/6265 cut-off events. [2024-06-27 21:19:04,489 INFO L125 PetriNetUnfolderBase]: For 694939/694939 co-relation queries the response was YES. [2024-06-27 21:19:04,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44916 conditions, 6265 events. 3935/6265 cut-off events. For 694939/694939 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38242 event pairs, 1080 based on Foata normal form. 2/6266 useless extension candidates. Maximal degree in co-relation 44787. Up to 5933 conditions per place. [2024-06-27 21:19:04,568 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 39 changer transitions 0/370 dead transitions. [2024-06-27 21:19:04,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 370 transitions, 4910 flow [2024-06-27 21:19:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:19:04,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 21:19:04,571 INFO L175 Difference]: Start difference. First operand has 266 places, 345 transitions, 4089 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:19:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 370 transitions, 4910 flow [2024-06-27 21:19:05,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 370 transitions, 4678 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:05,418 INFO L231 Difference]: Finished difference. Result has 270 places, 346 transitions, 3967 flow [2024-06-27 21:19:05,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3967, PETRI_PLACES=270, PETRI_TRANSITIONS=346} [2024-06-27 21:19:05,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 21:19:05,419 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 346 transitions, 3967 flow [2024-06-27 21:19:05,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:05,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:05,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:05,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:19:05,420 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:05,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1129596459, now seen corresponding path program 2 times [2024-06-27 21:19:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:05,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775004605] [2024-06-27 21:19:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:08,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775004605] [2024-06-27 21:19:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775004605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:08,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:08,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:08,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822794619] [2024-06-27 21:19:08,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:08,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:08,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 346 transitions, 3967 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:08,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:08,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:08,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:10,588 INFO L124 PetriNetUnfolderBase]: 4012/6404 cut-off events. [2024-06-27 21:19:10,589 INFO L125 PetriNetUnfolderBase]: For 741335/741335 co-relation queries the response was YES. [2024-06-27 21:19:10,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46192 conditions, 6404 events. 4012/6404 cut-off events. For 741335/741335 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39420 event pairs, 918 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 46061. Up to 4713 conditions per place. [2024-06-27 21:19:10,669 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 224 selfloop transitions, 172 changer transitions 0/401 dead transitions. [2024-06-27 21:19:10,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 401 transitions, 5700 flow [2024-06-27 21:19:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:19:10,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 21:19:10,671 INFO L175 Difference]: Start difference. First operand has 270 places, 346 transitions, 3967 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:19:10,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 401 transitions, 5700 flow [2024-06-27 21:19:11,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 401 transitions, 5611 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:11,916 INFO L231 Difference]: Finished difference. Result has 274 places, 360 transitions, 4484 flow [2024-06-27 21:19:11,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4484, PETRI_PLACES=274, PETRI_TRANSITIONS=360} [2024-06-27 21:19:11,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 21:19:11,917 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 360 transitions, 4484 flow [2024-06-27 21:19:11,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:11,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:11,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:11,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:19:11,917 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:11,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:11,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1352530695, now seen corresponding path program 3 times [2024-06-27 21:19:11,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:11,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030053616] [2024-06-27 21:19:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:11,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:14,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030053616] [2024-06-27 21:19:14,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030053616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:14,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:14,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354935059] [2024-06-27 21:19:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:14,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:14,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:14,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:14,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 360 transitions, 4484 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:14,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:14,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:14,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:17,113 INFO L124 PetriNetUnfolderBase]: 4017/6413 cut-off events. [2024-06-27 21:19:17,114 INFO L125 PetriNetUnfolderBase]: For 765129/765129 co-relation queries the response was YES. [2024-06-27 21:19:17,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47948 conditions, 6413 events. 4017/6413 cut-off events. For 765129/765129 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39452 event pairs, 918 based on Foata normal form. 1/6412 useless extension candidates. Maximal degree in co-relation 47815. Up to 4715 conditions per place. [2024-06-27 21:19:17,202 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 175 changer transitions 0/399 dead transitions. [2024-06-27 21:19:17,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 399 transitions, 6058 flow [2024-06-27 21:19:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:19:17,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:19:17,204 INFO L175 Difference]: Start difference. First operand has 274 places, 360 transitions, 4484 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:19:17,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 399 transitions, 6058 flow [2024-06-27 21:19:18,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 399 transitions, 5875 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-27 21:19:18,344 INFO L231 Difference]: Finished difference. Result has 280 places, 363 transitions, 4738 flow [2024-06-27 21:19:18,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4738, PETRI_PLACES=280, PETRI_TRANSITIONS=363} [2024-06-27 21:19:18,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 21:19:18,344 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 363 transitions, 4738 flow [2024-06-27 21:19:18,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:18,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:18,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:19:18,345 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:18,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -156420871, now seen corresponding path program 4 times [2024-06-27 21:19:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:18,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216035099] [2024-06-27 21:19:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:21,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:21,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216035099] [2024-06-27 21:19:21,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216035099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:21,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379880488] [2024-06-27 21:19:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:21,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:21,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:21,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 363 transitions, 4738 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:21,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:21,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:21,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:23,201 INFO L124 PetriNetUnfolderBase]: 4038/6439 cut-off events. [2024-06-27 21:19:23,201 INFO L125 PetriNetUnfolderBase]: For 787042/787042 co-relation queries the response was YES. [2024-06-27 21:19:23,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48173 conditions, 6439 events. 4038/6439 cut-off events. For 787042/787042 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39661 event pairs, 1092 based on Foata normal form. 1/6439 useless extension candidates. Maximal degree in co-relation 48037. Up to 6045 conditions per place. [2024-06-27 21:19:23,287 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 337 selfloop transitions, 53 changer transitions 0/395 dead transitions. [2024-06-27 21:19:23,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 395 transitions, 5883 flow [2024-06-27 21:19:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:19:23,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-27 21:19:23,289 INFO L175 Difference]: Start difference. First operand has 280 places, 363 transitions, 4738 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:19:23,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 395 transitions, 5883 flow [2024-06-27 21:19:24,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 395 transitions, 5524 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:24,585 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 4627 flow [2024-06-27 21:19:24,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4627, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-27 21:19:24,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-27 21:19:24,585 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 4627 flow [2024-06-27 21:19:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:24,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:24,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:19:24,586 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:24,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 594899413, now seen corresponding path program 5 times [2024-06-27 21:19:24,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:24,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276036514] [2024-06-27 21:19:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276036514] [2024-06-27 21:19:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276036514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:27,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548989542] [2024-06-27 21:19:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:27,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 4627 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:27,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:27,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:27,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:29,950 INFO L124 PetriNetUnfolderBase]: 4043/6418 cut-off events. [2024-06-27 21:19:29,951 INFO L125 PetriNetUnfolderBase]: For 802829/802829 co-relation queries the response was YES. [2024-06-27 21:19:30,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47836 conditions, 6418 events. 4043/6418 cut-off events. For 802829/802829 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39322 event pairs, 1140 based on Foata normal form. 1/6404 useless extension candidates. Maximal degree in co-relation 47698. Up to 4728 conditions per place. [2024-06-27 21:19:30,040 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 167 changer transitions 0/414 dead transitions. [2024-06-27 21:19:30,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 414 transitions, 6322 flow [2024-06-27 21:19:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:19:30,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 21:19:30,041 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 4627 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:19:30,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 414 transitions, 6322 flow [2024-06-27 21:19:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 414 transitions, 6179 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:19:31,524 INFO L231 Difference]: Finished difference. Result has 287 places, 379 transitions, 5070 flow [2024-06-27 21:19:31,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5070, PETRI_PLACES=287, PETRI_TRANSITIONS=379} [2024-06-27 21:19:31,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-27 21:19:31,525 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 379 transitions, 5070 flow [2024-06-27 21:19:31,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:31,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:31,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:31,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:19:31,525 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash 997192999, now seen corresponding path program 6 times [2024-06-27 21:19:31,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:31,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033382490] [2024-06-27 21:19:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:31,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:34,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033382490] [2024-06-27 21:19:34,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033382490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:34,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:34,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516669852] [2024-06-27 21:19:34,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:34,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:34,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 379 transitions, 5070 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:34,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:34,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:34,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:36,690 INFO L124 PetriNetUnfolderBase]: 4048/6440 cut-off events. [2024-06-27 21:19:36,691 INFO L125 PetriNetUnfolderBase]: For 825360/825360 co-relation queries the response was YES. [2024-06-27 21:19:36,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48795 conditions, 6440 events. 4048/6440 cut-off events. For 825360/825360 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39495 event pairs, 1139 based on Foata normal form. 1/6427 useless extension candidates. Maximal degree in co-relation 48656. Up to 4730 conditions per place. [2024-06-27 21:19:36,784 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 239 selfloop transitions, 172 changer transitions 0/416 dead transitions. [2024-06-27 21:19:36,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 416 transitions, 6668 flow [2024-06-27 21:19:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:19:36,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 21:19:36,786 INFO L175 Difference]: Start difference. First operand has 287 places, 379 transitions, 5070 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:19:36,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 416 transitions, 6668 flow [2024-06-27 21:19:38,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 416 transitions, 6479 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-27 21:19:38,480 INFO L231 Difference]: Finished difference. Result has 294 places, 384 transitions, 5355 flow [2024-06-27 21:19:38,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5355, PETRI_PLACES=294, PETRI_TRANSITIONS=384} [2024-06-27 21:19:38,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-27 21:19:38,481 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 384 transitions, 5355 flow [2024-06-27 21:19:38,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:38,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:38,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:38,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:19:38,482 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:38,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:38,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1775974971, now seen corresponding path program 7 times [2024-06-27 21:19:38,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:38,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706427064] [2024-06-27 21:19:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:38,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:41,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:41,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706427064] [2024-06-27 21:19:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706427064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:41,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906457930] [2024-06-27 21:19:41,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:41,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:41,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:41,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:41,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 384 transitions, 5355 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:41,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:41,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:41,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:43,776 INFO L124 PetriNetUnfolderBase]: 4079/6480 cut-off events. [2024-06-27 21:19:43,776 INFO L125 PetriNetUnfolderBase]: For 861646/861646 co-relation queries the response was YES. [2024-06-27 21:19:43,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50106 conditions, 6480 events. 4079/6480 cut-off events. For 861646/861646 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 39871 event pairs, 1144 based on Foata normal form. 3/6468 useless extension candidates. Maximal degree in co-relation 49964. Up to 4747 conditions per place. [2024-06-27 21:19:43,865 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 173 changer transitions 0/418 dead transitions. [2024-06-27 21:19:43,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 418 transitions, 6942 flow [2024-06-27 21:19:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:19:43,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:19:43,866 INFO L175 Difference]: Start difference. First operand has 294 places, 384 transitions, 5355 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:19:43,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 418 transitions, 6942 flow [2024-06-27 21:19:45,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 418 transitions, 6702 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:45,191 INFO L231 Difference]: Finished difference. Result has 298 places, 391 transitions, 5618 flow [2024-06-27 21:19:45,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5123, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5618, PETRI_PLACES=298, PETRI_TRANSITIONS=391} [2024-06-27 21:19:45,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-27 21:19:45,192 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 391 transitions, 5618 flow [2024-06-27 21:19:45,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:45,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:45,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:45,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:19:45,193 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:45,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 864916023, now seen corresponding path program 8 times [2024-06-27 21:19:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:45,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701514306] [2024-06-27 21:19:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:45,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:48,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:48,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701514306] [2024-06-27 21:19:48,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701514306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:48,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:48,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177939449] [2024-06-27 21:19:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:48,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:48,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:48,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 391 transitions, 5618 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:48,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:48,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:48,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:50,260 INFO L124 PetriNetUnfolderBase]: 4150/6595 cut-off events. [2024-06-27 21:19:50,260 INFO L125 PetriNetUnfolderBase]: For 912464/912464 co-relation queries the response was YES. [2024-06-27 21:19:50,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51708 conditions, 6595 events. 4150/6595 cut-off events. For 912464/912464 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40671 event pairs, 1048 based on Foata normal form. 3/6590 useless extension candidates. Maximal degree in co-relation 51564. Up to 5732 conditions per place. [2024-06-27 21:19:50,352 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 318 selfloop transitions, 97 changer transitions 0/420 dead transitions. [2024-06-27 21:19:50,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 420 transitions, 6988 flow [2024-06-27 21:19:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:19:50,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:19:50,356 INFO L175 Difference]: Start difference. First operand has 298 places, 391 transitions, 5618 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:19:50,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 420 transitions, 6988 flow [2024-06-27 21:19:52,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 420 transitions, 6643 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:52,017 INFO L231 Difference]: Finished difference. Result has 304 places, 397 transitions, 5631 flow [2024-06-27 21:19:52,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5631, PETRI_PLACES=304, PETRI_TRANSITIONS=397} [2024-06-27 21:19:52,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-27 21:19:52,018 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 397 transitions, 5631 flow [2024-06-27 21:19:52,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:52,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:52,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:52,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:19:52,019 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:52,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1835860131, now seen corresponding path program 9 times [2024-06-27 21:19:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:52,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606593916] [2024-06-27 21:19:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606593916] [2024-06-27 21:19:54,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606593916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:54,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:54,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:54,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958959883] [2024-06-27 21:19:54,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:54,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:54,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:54,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 397 transitions, 5631 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:54,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:54,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:54,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:57,246 INFO L124 PetriNetUnfolderBase]: 4141/6585 cut-off events. [2024-06-27 21:19:57,246 INFO L125 PetriNetUnfolderBase]: For 917861/917861 co-relation queries the response was YES. [2024-06-27 21:19:57,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51177 conditions, 6585 events. 4141/6585 cut-off events. For 917861/917861 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40582 event pairs, 1041 based on Foata normal form. 3/6580 useless extension candidates. Maximal degree in co-relation 51031. Up to 5728 conditions per place. [2024-06-27 21:19:57,342 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 318 selfloop transitions, 100 changer transitions 0/423 dead transitions. [2024-06-27 21:19:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 423 transitions, 6915 flow [2024-06-27 21:19:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:19:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:19:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 21:19:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-27 21:19:57,343 INFO L175 Difference]: Start difference. First operand has 304 places, 397 transitions, 5631 flow. Second operand 10 states and 171 transitions. [2024-06-27 21:19:57,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 423 transitions, 6915 flow [2024-06-27 21:19:58,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 423 transitions, 6638 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:58,979 INFO L231 Difference]: Finished difference. Result has 307 places, 398 transitions, 5611 flow [2024-06-27 21:19:58,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5611, PETRI_PLACES=307, PETRI_TRANSITIONS=398} [2024-06-27 21:19:58,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 21:19:58,980 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 398 transitions, 5611 flow [2024-06-27 21:19:58,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:58,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:58,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:58,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:19:58,980 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:58,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash 258770900, now seen corresponding path program 1 times [2024-06-27 21:19:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692660269] [2024-06-27 21:19:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:02,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692660269] [2024-06-27 21:20:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692660269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:02,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:02,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901255211] [2024-06-27 21:20:02,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:02,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:02,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:02,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 398 transitions, 5611 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:02,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:02,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:02,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:04,762 INFO L124 PetriNetUnfolderBase]: 4450/7103 cut-off events. [2024-06-27 21:20:04,762 INFO L125 PetriNetUnfolderBase]: For 1172224/1172232 co-relation queries the response was YES. [2024-06-27 21:20:04,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 7103 events. 4450/7103 cut-off events. For 1172224/1172232 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44597 event pairs, 1159 based on Foata normal form. 24/7123 useless extension candidates. Maximal degree in co-relation 57740. Up to 5247 conditions per place. [2024-06-27 21:20:04,847 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 112 changer transitions 0/447 dead transitions. [2024-06-27 21:20:04,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 447 transitions, 7177 flow [2024-06-27 21:20:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:20:04,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 21:20:04,849 INFO L175 Difference]: Start difference. First operand has 307 places, 398 transitions, 5611 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:20:04,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 447 transitions, 7177 flow [2024-06-27 21:20:07,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 447 transitions, 6987 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:20:07,082 INFO L231 Difference]: Finished difference. Result has 309 places, 404 transitions, 5819 flow [2024-06-27 21:20:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5819, PETRI_PLACES=309, PETRI_TRANSITIONS=404} [2024-06-27 21:20:07,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 21:20:07,083 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 404 transitions, 5819 flow [2024-06-27 21:20:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:07,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:07,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:07,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:20:07,084 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:07,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:07,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1625988260, now seen corresponding path program 2 times [2024-06-27 21:20:07,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:07,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412395058] [2024-06-27 21:20:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:10,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412395058] [2024-06-27 21:20:10,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412395058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:10,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:10,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119062554] [2024-06-27 21:20:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:10,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:10,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:10,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:10,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 404 transitions, 5819 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:10,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:10,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:10,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:12,696 INFO L124 PetriNetUnfolderBase]: 4538/7237 cut-off events. [2024-06-27 21:20:12,696 INFO L125 PetriNetUnfolderBase]: For 1242615/1242623 co-relation queries the response was YES. [2024-06-27 21:20:12,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59669 conditions, 7237 events. 4538/7237 cut-off events. For 1242615/1242623 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45628 event pairs, 1266 based on Foata normal form. 32/7265 useless extension candidates. Maximal degree in co-relation 59518. Up to 6111 conditions per place. [2024-06-27 21:20:12,787 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 111 changer transitions 0/436 dead transitions. [2024-06-27 21:20:12,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 436 transitions, 6824 flow [2024-06-27 21:20:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:20:12,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:20:12,789 INFO L175 Difference]: Start difference. First operand has 309 places, 404 transitions, 5819 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:20:12,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 436 transitions, 6824 flow [2024-06-27 21:20:14,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 436 transitions, 6667 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 21:20:14,890 INFO L231 Difference]: Finished difference. Result has 314 places, 406 transitions, 5943 flow [2024-06-27 21:20:14,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5662, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5943, PETRI_PLACES=314, PETRI_TRANSITIONS=406} [2024-06-27 21:20:14,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 21:20:14,891 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 406 transitions, 5943 flow [2024-06-27 21:20:14,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:14,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:14,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:14,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:20:14,891 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:14,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1542875090, now seen corresponding path program 3 times [2024-06-27 21:20:14,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:14,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380663518] [2024-06-27 21:20:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:14,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:18,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:18,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380663518] [2024-06-27 21:20:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380663518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:18,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:18,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:18,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71630357] [2024-06-27 21:20:18,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:18,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:18,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:18,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 406 transitions, 5943 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:18,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:18,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:18,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:20,528 INFO L124 PetriNetUnfolderBase]: 4689/7464 cut-off events. [2024-06-27 21:20:20,528 INFO L125 PetriNetUnfolderBase]: For 1298960/1298968 co-relation queries the response was YES. [2024-06-27 21:20:20,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63043 conditions, 7464 events. 4689/7464 cut-off events. For 1298960/1298968 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47182 event pairs, 1271 based on Foata normal form. 24/7484 useless extension candidates. Maximal degree in co-relation 62890. Up to 6125 conditions per place. [2024-06-27 21:20:20,639 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 328 selfloop transitions, 110 changer transitions 0/443 dead transitions. [2024-06-27 21:20:20,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 443 transitions, 7205 flow [2024-06-27 21:20:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:20:20,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:20:20,641 INFO L175 Difference]: Start difference. First operand has 314 places, 406 transitions, 5943 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:20:20,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 443 transitions, 7205 flow [2024-06-27 21:20:23,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 443 transitions, 7014 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:23,613 INFO L231 Difference]: Finished difference. Result has 318 places, 410 transitions, 6086 flow [2024-06-27 21:20:23,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5752, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6086, PETRI_PLACES=318, PETRI_TRANSITIONS=410} [2024-06-27 21:20:23,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-27 21:20:23,614 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 410 transitions, 6086 flow [2024-06-27 21:20:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:23,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:23,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:20:23,614 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:23,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash 166095392, now seen corresponding path program 4 times [2024-06-27 21:20:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:23,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666763805] [2024-06-27 21:20:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:27,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:27,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666763805] [2024-06-27 21:20:27,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666763805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:27,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:27,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795928852] [2024-06-27 21:20:27,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:27,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:27,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:27,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:27,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 410 transitions, 6086 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:27,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:27,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:27,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:30,808 INFO L124 PetriNetUnfolderBase]: 4777/7594 cut-off events. [2024-06-27 21:20:30,809 INFO L125 PetriNetUnfolderBase]: For 1367076/1367076 co-relation queries the response was YES. [2024-06-27 21:20:30,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64213 conditions, 7594 events. 4777/7594 cut-off events. For 1367076/1367076 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48109 event pairs, 1361 based on Foata normal form. 24/7609 useless extension candidates. Maximal degree in co-relation 64058. Up to 6480 conditions per place. [2024-06-27 21:20:30,915 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 123 changer transitions 0/449 dead transitions. [2024-06-27 21:20:30,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 449 transitions, 7139 flow [2024-06-27 21:20:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 21:20:30,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-27 21:20:30,917 INFO L175 Difference]: Start difference. First operand has 318 places, 410 transitions, 6086 flow. Second operand 11 states and 190 transitions. [2024-06-27 21:20:30,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 449 transitions, 7139 flow [2024-06-27 21:20:34,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 449 transitions, 6962 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 21:20:34,066 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 6222 flow [2024-06-27 21:20:34,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6222, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-27 21:20:34,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 21:20:34,067 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 6222 flow [2024-06-27 21:20:34,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:34,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:34,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:34,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:20:34,067 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:34,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash -367878914, now seen corresponding path program 1 times [2024-06-27 21:20:34,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:34,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949272664] [2024-06-27 21:20:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:37,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949272664] [2024-06-27 21:20:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949272664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:37,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:37,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:37,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949819057] [2024-06-27 21:20:37,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:37,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:37,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 6222 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:40,902 INFO L124 PetriNetUnfolderBase]: 4905/7794 cut-off events. [2024-06-27 21:20:40,902 INFO L125 PetriNetUnfolderBase]: For 1412576/1412576 co-relation queries the response was YES. [2024-06-27 21:20:40,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67199 conditions, 7794 events. 4905/7794 cut-off events. For 1412576/1412576 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 49472 event pairs, 1383 based on Foata normal form. 16/7801 useless extension candidates. Maximal degree in co-relation 67042. Up to 6440 conditions per place. [2024-06-27 21:20:41,014 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 130 changer transitions 0/456 dead transitions. [2024-06-27 21:20:41,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 456 transitions, 7549 flow [2024-06-27 21:20:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 21:20:41,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059196617336152 [2024-06-27 21:20:41,016 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 6222 flow. Second operand 11 states and 192 transitions. [2024-06-27 21:20:41,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 456 transitions, 7549 flow [2024-06-27 21:20:44,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 456 transitions, 7261 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 21:20:44,653 INFO L231 Difference]: Finished difference. Result has 328 places, 416 transitions, 6332 flow [2024-06-27 21:20:44,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6332, PETRI_PLACES=328, PETRI_TRANSITIONS=416} [2024-06-27 21:20:44,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-27 21:20:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 416 transitions, 6332 flow [2024-06-27 21:20:44,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:44,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:44,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:20:44,655 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -373600646, now seen corresponding path program 5 times [2024-06-27 21:20:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902718275] [2024-06-27 21:20:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902718275] [2024-06-27 21:20:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902718275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448797314] [2024-06-27 21:20:48,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:48,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:48,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 416 transitions, 6332 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:48,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:48,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:48,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:51,116 INFO L124 PetriNetUnfolderBase]: 4849/7714 cut-off events. [2024-06-27 21:20:51,116 INFO L125 PetriNetUnfolderBase]: For 1361677/1361677 co-relation queries the response was YES. [2024-06-27 21:20:51,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64423 conditions, 7714 events. 4849/7714 cut-off events. For 1361677/1361677 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 48993 event pairs, 1387 based on Foata normal form. 24/7729 useless extension candidates. Maximal degree in co-relation 64264. Up to 6596 conditions per place. [2024-06-27 21:20:51,222 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 326 selfloop transitions, 117 changer transitions 0/448 dead transitions. [2024-06-27 21:20:51,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 448 transitions, 7316 flow [2024-06-27 21:20:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:20:51,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 21:20:51,223 INFO L175 Difference]: Start difference. First operand has 328 places, 416 transitions, 6332 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:20:51,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 448 transitions, 7316 flow [2024-06-27 21:20:54,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 448 transitions, 7061 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 21:20:54,365 INFO L231 Difference]: Finished difference. Result has 330 places, 416 transitions, 6317 flow [2024-06-27 21:20:54,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6317, PETRI_PLACES=330, PETRI_TRANSITIONS=416} [2024-06-27 21:20:54,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 21:20:54,366 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 416 transitions, 6317 flow [2024-06-27 21:20:54,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:54,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:54,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:20:54,367 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:54,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1784563800, now seen corresponding path program 6 times [2024-06-27 21:20:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:54,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164775057] [2024-06-27 21:20:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164775057] [2024-06-27 21:20:57,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164775057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:57,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623247920] [2024-06-27 21:20:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:57,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:57,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 416 transitions, 6317 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:57,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:57,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:57,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:00,355 INFO L124 PetriNetUnfolderBase]: 5000/7947 cut-off events. [2024-06-27 21:21:00,355 INFO L125 PetriNetUnfolderBase]: For 1418398/1418398 co-relation queries the response was YES. [2024-06-27 21:21:00,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67187 conditions, 7947 events. 5000/7947 cut-off events. For 1418398/1418398 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 50720 event pairs, 1402 based on Foata normal form. 16/7954 useless extension candidates. Maximal degree in co-relation 67026. Up to 6472 conditions per place. [2024-06-27 21:21:00,463 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 334 selfloop transitions, 116 changer transitions 0/455 dead transitions. [2024-06-27 21:21:00,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 455 transitions, 7633 flow [2024-06-27 21:21:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:21:00,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:21:00,465 INFO L175 Difference]: Start difference. First operand has 330 places, 416 transitions, 6317 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:21:00,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 455 transitions, 7633 flow [2024-06-27 21:21:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 455 transitions, 7392 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:21:03,426 INFO L231 Difference]: Finished difference. Result has 333 places, 420 transitions, 6445 flow [2024-06-27 21:21:03,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6445, PETRI_PLACES=333, PETRI_TRANSITIONS=420} [2024-06-27 21:21:03,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 21:21:03,427 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 420 transitions, 6445 flow [2024-06-27 21:21:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:03,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:03,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:21:03,427 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:03,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 879015102, now seen corresponding path program 7 times [2024-06-27 21:21:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:03,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697015311] [2024-06-27 21:21:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:06,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:06,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697015311] [2024-06-27 21:21:06,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697015311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:06,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:06,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:06,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005169123] [2024-06-27 21:21:06,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:06,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:06,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:06,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:06,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 420 transitions, 6445 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:06,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:06,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:06,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:09,470 INFO L124 PetriNetUnfolderBase]: 5228/8270 cut-off events. [2024-06-27 21:21:09,470 INFO L125 PetriNetUnfolderBase]: For 1707321/1707321 co-relation queries the response was YES. [2024-06-27 21:21:09,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69196 conditions, 8270 events. 5228/8270 cut-off events. For 1707321/1707321 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 52723 event pairs, 1364 based on Foata normal form. 68/8330 useless extension candidates. Maximal degree in co-relation 69033. Up to 7249 conditions per place. [2024-06-27 21:21:09,591 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 345 selfloop transitions, 96 changer transitions 7/453 dead transitions. [2024-06-27 21:21:09,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 453 transitions, 7486 flow [2024-06-27 21:21:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:21:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:21:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:21:09,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:21:09,593 INFO L175 Difference]: Start difference. First operand has 333 places, 420 transitions, 6445 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:21:09,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 453 transitions, 7486 flow [2024-06-27 21:21:12,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 453 transitions, 7285 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:12,777 INFO L231 Difference]: Finished difference. Result has 338 places, 417 transitions, 6409 flow [2024-06-27 21:21:12,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6409, PETRI_PLACES=338, PETRI_TRANSITIONS=417} [2024-06-27 21:21:12,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 21:21:12,778 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 417 transitions, 6409 flow [2024-06-27 21:21:12,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:12,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:12,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:12,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:21:12,779 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:12,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001972, now seen corresponding path program 2 times [2024-06-27 21:21:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:12,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015060891] [2024-06-27 21:21:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:12,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:15,913 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 21:21:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015060891] [2024-06-27 21:21:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015060891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:15,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052759328] [2024-06-27 21:21:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:15,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:15,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:15,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:15,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 417 transitions, 6409 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:15,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:15,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:15,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:18,805 INFO L124 PetriNetUnfolderBase]: 5148/8164 cut-off events. [2024-06-27 21:21:18,805 INFO L125 PetriNetUnfolderBase]: For 1592744/1592744 co-relation queries the response was YES. [2024-06-27 21:21:18,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67080 conditions, 8164 events. 5148/8164 cut-off events. For 1592744/1592744 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 51951 event pairs, 1210 based on Foata normal form. 56/8212 useless extension candidates. Maximal degree in co-relation 66915. Up to 6283 conditions per place. [2024-06-27 21:21:18,921 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 338 selfloop transitions, 97 changer transitions 17/457 dead transitions. [2024-06-27 21:21:18,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 457 transitions, 7695 flow [2024-06-27 21:21:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:21:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:21:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 21:21:18,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-27 21:21:18,923 INFO L175 Difference]: Start difference. First operand has 338 places, 417 transitions, 6409 flow. Second operand 10 states and 181 transitions. [2024-06-27 21:21:18,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 457 transitions, 7695 flow [2024-06-27 21:21:21,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 457 transitions, 7477 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:21:21,588 INFO L231 Difference]: Finished difference. Result has 340 places, 406 transitions, 6244 flow [2024-06-27 21:21:21,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6244, PETRI_PLACES=340, PETRI_TRANSITIONS=406} [2024-06-27 21:21:21,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-27 21:21:21,589 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 406 transitions, 6244 flow [2024-06-27 21:21:21,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:21,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:21,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:21:21,590 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -339075170, now seen corresponding path program 3 times [2024-06-27 21:21:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623566411] [2024-06-27 21:21:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623566411] [2024-06-27 21:21:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623566411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:25,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:25,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:25,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456656096] [2024-06-27 21:21:25,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:25,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:25,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:25,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:25,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 406 transitions, 6244 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:25,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:25,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:27,981 INFO L124 PetriNetUnfolderBase]: 4696/7470 cut-off events. [2024-06-27 21:21:27,982 INFO L125 PetriNetUnfolderBase]: For 1333235/1333235 co-relation queries the response was YES. [2024-06-27 21:21:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57539 conditions, 7470 events. 4696/7470 cut-off events. For 1333235/1333235 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47333 event pairs, 1130 based on Foata normal form. 68/7530 useless extension candidates. Maximal degree in co-relation 57373. Up to 6483 conditions per place. [2024-06-27 21:21:28,097 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 81 changer transitions 7/436 dead transitions. [2024-06-27 21:21:28,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 436 transitions, 7202 flow [2024-06-27 21:21:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:21:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:21:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:21:28,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:21:28,099 INFO L175 Difference]: Start difference. First operand has 340 places, 406 transitions, 6244 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:21:28,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 436 transitions, 7202 flow [2024-06-27 21:21:30,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 436 transitions, 6816 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-27 21:21:30,878 INFO L231 Difference]: Finished difference. Result has 339 places, 401 transitions, 5946 flow [2024-06-27 21:21:30,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5946, PETRI_PLACES=339, PETRI_TRANSITIONS=401} [2024-06-27 21:21:30,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-27 21:21:30,899 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 401 transitions, 5946 flow [2024-06-27 21:21:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:30,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:30,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:21:30,899 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:30,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash -339228992, now seen corresponding path program 8 times [2024-06-27 21:21:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443054580] [2024-06-27 21:21:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:34,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:34,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443054580] [2024-06-27 21:21:34,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443054580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:34,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:34,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:34,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68282803] [2024-06-27 21:21:34,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:34,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:34,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:34,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 401 transitions, 5946 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:34,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:34,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:34,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:36,599 INFO L124 PetriNetUnfolderBase]: 5005/7981 cut-off events. [2024-06-27 21:21:36,599 INFO L125 PetriNetUnfolderBase]: For 1532644/1532644 co-relation queries the response was YES. [2024-06-27 21:21:36,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63422 conditions, 7981 events. 5005/7981 cut-off events. For 1532644/1532644 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 50842 event pairs, 1189 based on Foata normal form. 56/8029 useless extension candidates. Maximal degree in co-relation 63257. Up to 6148 conditions per place. [2024-06-27 21:21:36,719 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 359 selfloop transitions, 74 changer transitions 0/438 dead transitions. [2024-06-27 21:21:36,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 438 transitions, 7193 flow [2024-06-27 21:21:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:21:36,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:21:36,721 INFO L175 Difference]: Start difference. First operand has 339 places, 401 transitions, 5946 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:21:36,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 438 transitions, 7193 flow [2024-06-27 21:21:39,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 438 transitions, 6717 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-27 21:21:39,564 INFO L231 Difference]: Finished difference. Result has 335 places, 403 transitions, 5696 flow [2024-06-27 21:21:39,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5696, PETRI_PLACES=335, PETRI_TRANSITIONS=403} [2024-06-27 21:21:39,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 21:21:39,580 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 403 transitions, 5696 flow [2024-06-27 21:21:39,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:39,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:39,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:39,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:21:39,581 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:39,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1318730135, now seen corresponding path program 1 times [2024-06-27 21:21:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249067853] [2024-06-27 21:21:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:42,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249067853] [2024-06-27 21:21:42,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249067853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:42,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:42,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:42,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101578756] [2024-06-27 21:21:42,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:42,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:42,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:42,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 403 transitions, 5696 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:42,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:42,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:42,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:45,653 INFO L124 PetriNetUnfolderBase]: 4987/7977 cut-off events. [2024-06-27 21:21:45,653 INFO L125 PetriNetUnfolderBase]: For 1255504/1255504 co-relation queries the response was YES. [2024-06-27 21:21:45,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62445 conditions, 7977 events. 4987/7977 cut-off events. For 1255504/1255504 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50892 event pairs, 1306 based on Foata normal form. 8/7977 useless extension candidates. Maximal degree in co-relation 62279. Up to 7284 conditions per place. [2024-06-27 21:21:45,773 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 390 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-27 21:21:45,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 432 transitions, 6880 flow [2024-06-27 21:21:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:21:45,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:21:45,774 INFO L175 Difference]: Start difference. First operand has 335 places, 403 transitions, 5696 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:21:45,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 432 transitions, 6880 flow [2024-06-27 21:21:48,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 432 transitions, 6444 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-27 21:21:48,814 INFO L231 Difference]: Finished difference. Result has 332 places, 403 transitions, 5338 flow [2024-06-27 21:21:48,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5338, PETRI_PLACES=332, PETRI_TRANSITIONS=403} [2024-06-27 21:21:48,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 21:21:48,815 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 403 transitions, 5338 flow [2024-06-27 21:21:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:48,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:48,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:48,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:21:48,815 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:48,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash -692786059, now seen corresponding path program 2 times [2024-06-27 21:21:48,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:48,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336708283] [2024-06-27 21:21:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:48,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336708283] [2024-06-27 21:21:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336708283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90860839] [2024-06-27 21:21:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:52,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:52,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 403 transitions, 5338 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:52,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:52,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:52,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:54,606 INFO L124 PetriNetUnfolderBase]: 4969/7951 cut-off events. [2024-06-27 21:21:54,607 INFO L125 PetriNetUnfolderBase]: For 1227013/1227013 co-relation queries the response was YES. [2024-06-27 21:21:54,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59167 conditions, 7951 events. 4969/7951 cut-off events. For 1227013/1227013 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 50816 event pairs, 1419 based on Foata normal form. 8/7951 useless extension candidates. Maximal degree in co-relation 59003. Up to 7388 conditions per place. [2024-06-27 21:21:54,723 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 383 selfloop transitions, 38 changer transitions 0/426 dead transitions. [2024-06-27 21:21:54,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 426 transitions, 6284 flow [2024-06-27 21:21:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:21:54,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:21:54,725 INFO L175 Difference]: Start difference. First operand has 332 places, 403 transitions, 5338 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:21:54,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 426 transitions, 6284 flow [2024-06-27 21:21:57,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 426 transitions, 6167 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:21:57,684 INFO L231 Difference]: Finished difference. Result has 333 places, 403 transitions, 5303 flow [2024-06-27 21:21:57,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5303, PETRI_PLACES=333, PETRI_TRANSITIONS=403} [2024-06-27 21:21:57,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 21:21:57,685 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 403 transitions, 5303 flow [2024-06-27 21:21:57,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:57,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:57,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:57,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:21:57,685 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:57,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash -810509235, now seen corresponding path program 1 times [2024-06-27 21:21:57,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835651521] [2024-06-27 21:21:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:57,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:00,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835651521] [2024-06-27 21:22:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835651521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:00,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069178940] [2024-06-27 21:22:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:00,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:00,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 403 transitions, 5303 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:00,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:00,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:00,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:03,365 INFO L124 PetriNetUnfolderBase]: 4979/7989 cut-off events. [2024-06-27 21:22:03,365 INFO L125 PetriNetUnfolderBase]: For 1217094/1217094 co-relation queries the response was YES. [2024-06-27 21:22:03,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59127 conditions, 7989 events. 4979/7989 cut-off events. For 1217094/1217094 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 51536 event pairs, 1472 based on Foata normal form. 2/7990 useless extension candidates. Maximal degree in co-relation 58963. Up to 7464 conditions per place. [2024-06-27 21:22:03,480 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 387 selfloop transitions, 59 changer transitions 0/451 dead transitions. [2024-06-27 21:22:03,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 451 transitions, 6591 flow [2024-06-27 21:22:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:22:03,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:22:03,482 INFO L175 Difference]: Start difference. First operand has 333 places, 403 transitions, 5303 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:22:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 451 transitions, 6591 flow [2024-06-27 21:22:06,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 451 transitions, 6497 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:06,726 INFO L231 Difference]: Finished difference. Result has 336 places, 406 transitions, 5377 flow [2024-06-27 21:22:06,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5209, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5377, PETRI_PLACES=336, PETRI_TRANSITIONS=406} [2024-06-27 21:22:06,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-27 21:22:06,727 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 406 transitions, 5377 flow [2024-06-27 21:22:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:06,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:06,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:22:06,728 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:06,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1499612571, now seen corresponding path program 1 times [2024-06-27 21:22:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190708024] [2024-06-27 21:22:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190708024] [2024-06-27 21:22:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190708024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:09,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:09,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952198081] [2024-06-27 21:22:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:09,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:09,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:09,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 406 transitions, 5377 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:09,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:09,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:09,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:12,293 INFO L124 PetriNetUnfolderBase]: 5021/8019 cut-off events. [2024-06-27 21:22:12,293 INFO L125 PetriNetUnfolderBase]: For 1261309/1261309 co-relation queries the response was YES. [2024-06-27 21:22:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60131 conditions, 8019 events. 5021/8019 cut-off events. For 1261309/1261309 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 51224 event pairs, 1131 based on Foata normal form. 2/8013 useless extension candidates. Maximal degree in co-relation 59966. Up to 6795 conditions per place. [2024-06-27 21:22:12,407 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 153 changer transitions 0/442 dead transitions. [2024-06-27 21:22:12,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 442 transitions, 6673 flow [2024-06-27 21:22:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:22:12,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:22:12,408 INFO L175 Difference]: Start difference. First operand has 336 places, 406 transitions, 5377 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:22:12,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 442 transitions, 6673 flow [2024-06-27 21:22:15,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 442 transitions, 6543 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:22:15,904 INFO L231 Difference]: Finished difference. Result has 338 places, 412 transitions, 5783 flow [2024-06-27 21:22:15,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5783, PETRI_PLACES=338, PETRI_TRANSITIONS=412} [2024-06-27 21:22:15,905 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 21:22:15,905 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 412 transitions, 5783 flow [2024-06-27 21:22:15,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:15,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:15,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:15,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:22:15,906 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:15,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1423146055, now seen corresponding path program 2 times [2024-06-27 21:22:15,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:15,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606060292] [2024-06-27 21:22:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606060292] [2024-06-27 21:22:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606060292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:19,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:19,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71552619] [2024-06-27 21:22:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:19,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:19,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:19,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 412 transitions, 5783 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:19,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:19,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:19,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:22,347 INFO L124 PetriNetUnfolderBase]: 5015/8035 cut-off events. [2024-06-27 21:22:22,347 INFO L125 PetriNetUnfolderBase]: For 1277799/1277799 co-relation queries the response was YES. [2024-06-27 21:22:22,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61107 conditions, 8035 events. 5015/8035 cut-off events. For 1277799/1277799 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 51661 event pairs, 1482 based on Foata normal form. 2/8036 useless extension candidates. Maximal degree in co-relation 60940. Up to 7517 conditions per place. [2024-06-27 21:22:22,446 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 393 selfloop transitions, 59 changer transitions 0/457 dead transitions. [2024-06-27 21:22:22,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 457 transitions, 6830 flow [2024-06-27 21:22:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:22:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:22:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:22:22,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 21:22:22,448 INFO L175 Difference]: Start difference. First operand has 338 places, 412 transitions, 5783 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:22:22,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 457 transitions, 6830 flow [2024-06-27 21:22:25,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 457 transitions, 6565 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:25,484 INFO L231 Difference]: Finished difference. Result has 342 places, 412 transitions, 5642 flow [2024-06-27 21:22:25,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5642, PETRI_PLACES=342, PETRI_TRANSITIONS=412} [2024-06-27 21:22:25,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 21:22:25,488 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 412 transitions, 5642 flow [2024-06-27 21:22:25,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:25,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:25,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:25,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:22:25,489 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:25,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:25,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1380827895, now seen corresponding path program 3 times [2024-06-27 21:22:25,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:25,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659015999] [2024-06-27 21:22:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:25,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:28,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659015999] [2024-06-27 21:22:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659015999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957284680] [2024-06-27 21:22:28,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:28,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:28,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:28,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:28,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 412 transitions, 5642 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:28,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:28,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:28,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:31,835 INFO L124 PetriNetUnfolderBase]: 5105/8159 cut-off events. [2024-06-27 21:22:31,835 INFO L125 PetriNetUnfolderBase]: For 1336106/1336106 co-relation queries the response was YES. [2024-06-27 21:22:31,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62523 conditions, 8159 events. 5105/8159 cut-off events. For 1336106/1336106 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52253 event pairs, 1178 based on Foata normal form. 2/8159 useless extension candidates. Maximal degree in co-relation 62356. Up to 6304 conditions per place. [2024-06-27 21:22:31,934 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 205 changer transitions 0/471 dead transitions. [2024-06-27 21:22:31,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 471 transitions, 7603 flow [2024-06-27 21:22:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 21:22:31,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 21:22:31,935 INFO L175 Difference]: Start difference. First operand has 342 places, 412 transitions, 5642 flow. Second operand 9 states and 182 transitions. [2024-06-27 21:22:31,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 471 transitions, 7603 flow [2024-06-27 21:22:35,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 471 transitions, 7494 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:22:35,251 INFO L231 Difference]: Finished difference. Result has 344 places, 425 transitions, 6193 flow [2024-06-27 21:22:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6193, PETRI_PLACES=344, PETRI_TRANSITIONS=425} [2024-06-27 21:22:35,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 21:22:35,252 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 425 transitions, 6193 flow [2024-06-27 21:22:35,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:35,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:35,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:22:35,254 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:35,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -880899579, now seen corresponding path program 4 times [2024-06-27 21:22:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989817982] [2024-06-27 21:22:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:38,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989817982] [2024-06-27 21:22:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989817982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:38,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:38,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:38,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979273667] [2024-06-27 21:22:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:38,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:38,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:38,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 425 transitions, 6193 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:38,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:38,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:38,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:41,196 INFO L124 PetriNetUnfolderBase]: 5307/8467 cut-off events. [2024-06-27 21:22:41,197 INFO L125 PetriNetUnfolderBase]: For 1511735/1511739 co-relation queries the response was YES. [2024-06-27 21:22:41,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68172 conditions, 8467 events. 5307/8467 cut-off events. For 1511735/1511739 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54380 event pairs, 1172 based on Foata normal form. 6/8471 useless extension candidates. Maximal degree in co-relation 68004. Up to 6442 conditions per place. [2024-06-27 21:22:41,322 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 230 changer transitions 0/486 dead transitions. [2024-06-27 21:22:41,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 486 transitions, 8536 flow [2024-06-27 21:22:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:22:41,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 21:22:41,324 INFO L175 Difference]: Start difference. First operand has 344 places, 425 transitions, 6193 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:22:41,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 486 transitions, 8536 flow [2024-06-27 21:22:45,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 486 transitions, 7986 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:45,457 INFO L231 Difference]: Finished difference. Result has 346 places, 444 transitions, 6499 flow [2024-06-27 21:22:45,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6499, PETRI_PLACES=346, PETRI_TRANSITIONS=444} [2024-06-27 21:22:45,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 21:22:45,458 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 444 transitions, 6499 flow [2024-06-27 21:22:45,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:45,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:45,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:45,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:22:45,458 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:45,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash -657750015, now seen corresponding path program 5 times [2024-06-27 21:22:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:45,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301427051] [2024-06-27 21:22:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:45,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:48,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:48,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301427051] [2024-06-27 21:22:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301427051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:48,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:48,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:48,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537457162] [2024-06-27 21:22:48,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:48,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:48,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:48,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 444 transitions, 6499 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:48,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:48,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:48,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:52,246 INFO L124 PetriNetUnfolderBase]: 5317/8481 cut-off events. [2024-06-27 21:22:52,247 INFO L125 PetriNetUnfolderBase]: For 1537094/1537094 co-relation queries the response was YES. [2024-06-27 21:22:52,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68308 conditions, 8481 events. 5317/8481 cut-off events. For 1537094/1537094 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 54464 event pairs, 1208 based on Foata normal form. 2/8481 useless extension candidates. Maximal degree in co-relation 68139. Up to 6448 conditions per place. [2024-06-27 21:22:52,355 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 227 changer transitions 0/486 dead transitions. [2024-06-27 21:22:52,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 486 transitions, 8064 flow [2024-06-27 21:22:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:22:52,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:22:52,382 INFO L175 Difference]: Start difference. First operand has 346 places, 444 transitions, 6499 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:22:52,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 486 transitions, 8064 flow [2024-06-27 21:22:56,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 486 transitions, 7700 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-27 21:22:56,319 INFO L231 Difference]: Finished difference. Result has 352 places, 447 transitions, 6641 flow [2024-06-27 21:22:56,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6138, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6641, PETRI_PLACES=352, PETRI_TRANSITIONS=447} [2024-06-27 21:22:56,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-27 21:22:56,320 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 447 transitions, 6641 flow [2024-06-27 21:22:56,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:56,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:56,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:56,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:22:56,321 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:56,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 895962491, now seen corresponding path program 6 times [2024-06-27 21:22:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:56,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643375438] [2024-06-27 21:22:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643375438] [2024-06-27 21:22:59,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643375438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:59,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:59,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947362979] [2024-06-27 21:22:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:59,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:59,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:59,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:59,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:59,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 447 transitions, 6641 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:59,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:59,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:59,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:02,292 INFO L124 PetriNetUnfolderBase]: 5343/8521 cut-off events. [2024-06-27 21:23:02,292 INFO L125 PetriNetUnfolderBase]: For 1579438/1579442 co-relation queries the response was YES. [2024-06-27 21:23:02,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68854 conditions, 8521 events. 5343/8521 cut-off events. For 1579438/1579442 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 54755 event pairs, 1191 based on Foata normal form. 6/8525 useless extension candidates. Maximal degree in co-relation 68684. Up to 6463 conditions per place. [2024-06-27 21:23:02,401 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 247 selfloop transitions, 238 changer transitions 0/490 dead transitions. [2024-06-27 21:23:02,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 490 transitions, 8714 flow [2024-06-27 21:23:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:23:02,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 21:23:02,403 INFO L175 Difference]: Start difference. First operand has 352 places, 447 transitions, 6641 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:23:02,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 490 transitions, 8714 flow [2024-06-27 21:23:06,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 490 transitions, 8397 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:06,199 INFO L231 Difference]: Finished difference. Result has 354 places, 453 transitions, 6920 flow [2024-06-27 21:23:06,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6920, PETRI_PLACES=354, PETRI_TRANSITIONS=453} [2024-06-27 21:23:06,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-27 21:23:06,200 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 453 transitions, 6920 flow [2024-06-27 21:23:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:06,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:06,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:23:06,200 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:06,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1318282097, now seen corresponding path program 2 times [2024-06-27 21:23:06,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:06,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240756531] [2024-06-27 21:23:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:06,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:09,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:09,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240756531] [2024-06-27 21:23:09,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240756531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:09,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:09,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:09,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188775214] [2024-06-27 21:23:09,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:09,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:09,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:09,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:09,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 453 transitions, 6920 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:09,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:09,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:09,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:12,643 INFO L124 PetriNetUnfolderBase]: 5353/8509 cut-off events. [2024-06-27 21:23:12,643 INFO L125 PetriNetUnfolderBase]: For 1615530/1615530 co-relation queries the response was YES. [2024-06-27 21:23:12,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69383 conditions, 8509 events. 5353/8509 cut-off events. For 1615530/1615530 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 54514 event pairs, 1506 based on Foata normal form. 2/8497 useless extension candidates. Maximal degree in co-relation 69212. Up to 6469 conditions per place. [2024-06-27 21:23:12,760 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 272 selfloop transitions, 210 changer transitions 0/487 dead transitions. [2024-06-27 21:23:12,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 487 transitions, 8532 flow [2024-06-27 21:23:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:23:12,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:23:12,762 INFO L175 Difference]: Start difference. First operand has 354 places, 453 transitions, 6920 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:23:12,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 487 transitions, 8532 flow [2024-06-27 21:23:16,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 487 transitions, 8130 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:16,976 INFO L231 Difference]: Finished difference. Result has 359 places, 456 transitions, 7023 flow [2024-06-27 21:23:16,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7023, PETRI_PLACES=359, PETRI_TRANSITIONS=456} [2024-06-27 21:23:16,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 21:23:16,976 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 456 transitions, 7023 flow [2024-06-27 21:23:16,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:16,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:16,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:16,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:23:16,977 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:16,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1759194135, now seen corresponding path program 7 times [2024-06-27 21:23:16,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:16,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833167212] [2024-06-27 21:23:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:16,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:20,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833167212] [2024-06-27 21:23:20,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833167212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:20,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:20,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572895320] [2024-06-27 21:23:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:20,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 456 transitions, 7023 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:23,880 INFO L124 PetriNetUnfolderBase]: 5861/9319 cut-off events. [2024-06-27 21:23:23,880 INFO L125 PetriNetUnfolderBase]: For 1746014/1746014 co-relation queries the response was YES. [2024-06-27 21:23:24,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76339 conditions, 9319 events. 5861/9319 cut-off events. For 1746014/1746014 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 60348 event pairs, 1318 based on Foata normal form. 2/9319 useless extension candidates. Maximal degree in co-relation 76167. Up to 6724 conditions per place. [2024-06-27 21:23:24,255 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 308 selfloop transitions, 330 changer transitions 0/643 dead transitions. [2024-06-27 21:23:24,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 643 transitions, 11453 flow [2024-06-27 21:23:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:23:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:23:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:23:24,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 21:23:24,256 INFO L175 Difference]: Start difference. First operand has 359 places, 456 transitions, 7023 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:23:24,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 643 transitions, 11453 flow [2024-06-27 21:23:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 643 transitions, 10774 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 21:23:28,556 INFO L231 Difference]: Finished difference. Result has 367 places, 575 transitions, 9361 flow [2024-06-27 21:23:28,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6528, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9361, PETRI_PLACES=367, PETRI_TRANSITIONS=575} [2024-06-27 21:23:28,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 21:23:28,557 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 575 transitions, 9361 flow [2024-06-27 21:23:28,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:28,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:28,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:28,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:23:28,558 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:28,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1483232475, now seen corresponding path program 3 times [2024-06-27 21:23:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:28,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667937025] [2024-06-27 21:23:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:31,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667937025] [2024-06-27 21:23:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667937025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:31,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:31,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21814709] [2024-06-27 21:23:31,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:31,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:31,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:31,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 575 transitions, 9361 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:31,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:31,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:34,838 INFO L124 PetriNetUnfolderBase]: 5871/9303 cut-off events. [2024-06-27 21:23:34,838 INFO L125 PetriNetUnfolderBase]: For 1780985/1780985 co-relation queries the response was YES. [2024-06-27 21:23:34,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77963 conditions, 9303 events. 5871/9303 cut-off events. For 1780985/1780985 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 60062 event pairs, 1620 based on Foata normal form. 2/9288 useless extension candidates. Maximal degree in co-relation 77786. Up to 6730 conditions per place. [2024-06-27 21:23:34,985 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 307 selfloop transitions, 295 changer transitions 0/607 dead transitions. [2024-06-27 21:23:34,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 607 transitions, 11424 flow [2024-06-27 21:23:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:23:34,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:23:34,987 INFO L175 Difference]: Start difference. First operand has 367 places, 575 transitions, 9361 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:23:34,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 607 transitions, 11424 flow [2024-06-27 21:23:39,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 607 transitions, 11050 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:23:39,721 INFO L231 Difference]: Finished difference. Result has 372 places, 578 transitions, 9659 flow [2024-06-27 21:23:39,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9659, PETRI_PLACES=372, PETRI_TRANSITIONS=578} [2024-06-27 21:23:39,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 21:23:39,722 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 578 transitions, 9659 flow [2024-06-27 21:23:39,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:39,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:39,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:39,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:23:39,722 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:39,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -390310615, now seen corresponding path program 4 times [2024-06-27 21:23:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:39,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935907978] [2024-06-27 21:23:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:39,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:43,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:43,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935907978] [2024-06-27 21:23:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935907978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:43,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:43,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919362507] [2024-06-27 21:23:43,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:43,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:43,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:43,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:43,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 578 transitions, 9659 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:43,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:43,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:43,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:46,122 INFO L124 PetriNetUnfolderBase]: 5865/9297 cut-off events. [2024-06-27 21:23:46,122 INFO L125 PetriNetUnfolderBase]: For 1806499/1806499 co-relation queries the response was YES. [2024-06-27 21:23:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77946 conditions, 9297 events. 5865/9297 cut-off events. For 1806499/1806499 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 60125 event pairs, 1618 based on Foata normal form. 2/9282 useless extension candidates. Maximal degree in co-relation 77768. Up to 6727 conditions per place. [2024-06-27 21:23:46,277 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 307 changer transitions 0/606 dead transitions. [2024-06-27 21:23:46,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 606 transitions, 11425 flow [2024-06-27 21:23:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:23:46,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:23:46,278 INFO L175 Difference]: Start difference. First operand has 372 places, 578 transitions, 9659 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:23:46,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 606 transitions, 11425 flow [2024-06-27 21:23:50,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 606 transitions, 10783 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:23:50,631 INFO L231 Difference]: Finished difference. Result has 375 places, 578 transitions, 9637 flow [2024-06-27 21:23:50,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9017, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9637, PETRI_PLACES=375, PETRI_TRANSITIONS=578} [2024-06-27 21:23:50,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-27 21:23:50,632 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 578 transitions, 9637 flow [2024-06-27 21:23:50,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:50,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:50,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:50,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:23:50,632 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:50,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash -463817285, now seen corresponding path program 8 times [2024-06-27 21:23:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638421300] [2024-06-27 21:23:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:53,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:53,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638421300] [2024-06-27 21:23:53,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638421300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:53,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:53,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:53,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634305507] [2024-06-27 21:23:53,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:53,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:53,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:53,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:53,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:53,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 578 transitions, 9637 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:53,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:53,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:53,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:57,066 INFO L124 PetriNetUnfolderBase]: 5885/9365 cut-off events. [2024-06-27 21:23:57,066 INFO L125 PetriNetUnfolderBase]: For 1846603/1846603 co-relation queries the response was YES. [2024-06-27 21:23:57,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78331 conditions, 9365 events. 5885/9365 cut-off events. For 1846603/1846603 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 60873 event pairs, 1319 based on Foata normal form. 4/9367 useless extension candidates. Maximal degree in co-relation 78152. Up to 6739 conditions per place. [2024-06-27 21:23:57,229 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 358 changer transitions 0/622 dead transitions. [2024-06-27 21:23:57,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 622 transitions, 11817 flow [2024-06-27 21:23:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:23:57,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 21:23:57,231 INFO L175 Difference]: Start difference. First operand has 375 places, 578 transitions, 9637 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:23:57,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 622 transitions, 11817 flow [2024-06-27 21:24:01,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 622 transitions, 11011 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 21:24:01,934 INFO L231 Difference]: Finished difference. Result has 375 places, 584 transitions, 9672 flow [2024-06-27 21:24:01,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9672, PETRI_PLACES=375, PETRI_TRANSITIONS=584} [2024-06-27 21:24:01,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-27 21:24:01,935 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 584 transitions, 9672 flow [2024-06-27 21:24:01,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:01,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:01,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:01,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:24:01,935 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:01,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1488341443, now seen corresponding path program 9 times [2024-06-27 21:24:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:01,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322209048] [2024-06-27 21:24:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:01,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:05,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:05,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322209048] [2024-06-27 21:24:05,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322209048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:05,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:05,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76595238] [2024-06-27 21:24:05,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:05,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:05,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:05,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:05,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:05,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 584 transitions, 9672 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:05,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:05,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:05,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:08,568 INFO L124 PetriNetUnfolderBase]: 5873/9349 cut-off events. [2024-06-27 21:24:08,569 INFO L125 PetriNetUnfolderBase]: For 1849713/1849713 co-relation queries the response was YES. [2024-06-27 21:24:08,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78112 conditions, 9349 events. 5873/9349 cut-off events. For 1849713/1849713 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 60713 event pairs, 1326 based on Foata normal form. 4/9351 useless extension candidates. Maximal degree in co-relation 77932. Up to 6733 conditions per place. [2024-06-27 21:24:08,706 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 256 selfloop transitions, 359 changer transitions 0/620 dead transitions. [2024-06-27 21:24:08,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 620 transitions, 11502 flow [2024-06-27 21:24:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:24:08,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 21:24:08,707 INFO L175 Difference]: Start difference. First operand has 375 places, 584 transitions, 9672 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:24:08,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 620 transitions, 11502 flow [2024-06-27 21:24:13,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 620 transitions, 10970 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:13,733 INFO L231 Difference]: Finished difference. Result has 379 places, 584 transitions, 9871 flow [2024-06-27 21:24:13,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9871, PETRI_PLACES=379, PETRI_TRANSITIONS=584} [2024-06-27 21:24:13,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 21:24:13,734 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 584 transitions, 9871 flow [2024-06-27 21:24:13,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:13,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:13,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:13,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:24:13,734 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash 528435083, now seen corresponding path program 5 times [2024-06-27 21:24:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:13,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741484426] [2024-06-27 21:24:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:16,551 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 21:24:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741484426] [2024-06-27 21:24:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741484426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:16,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:16,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:16,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616876276] [2024-06-27 21:24:16,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:16,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:16,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:16,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:16,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 584 transitions, 9871 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:16,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:16,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:16,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:19,770 INFO L124 PetriNetUnfolderBase]: 5883/9328 cut-off events. [2024-06-27 21:24:19,770 INFO L125 PetriNetUnfolderBase]: For 1877573/1877573 co-relation queries the response was YES. [2024-06-27 21:24:19,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78570 conditions, 9328 events. 5883/9328 cut-off events. For 1877573/1877573 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 60360 event pairs, 1510 based on Foata normal form. 2/9322 useless extension candidates. Maximal degree in co-relation 78389. Up to 8233 conditions per place. [2024-06-27 21:24:19,908 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 479 selfloop transitions, 128 changer transitions 0/612 dead transitions. [2024-06-27 21:24:19,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 612 transitions, 11689 flow [2024-06-27 21:24:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:24:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:24:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:24:19,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-27 21:24:19,910 INFO L175 Difference]: Start difference. First operand has 379 places, 584 transitions, 9871 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:24:19,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 612 transitions, 11689 flow [2024-06-27 21:24:24,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 612 transitions, 10676 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 21:24:24,765 INFO L231 Difference]: Finished difference. Result has 379 places, 587 transitions, 9192 flow [2024-06-27 21:24:24,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8866, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9192, PETRI_PLACES=379, PETRI_TRANSITIONS=587} [2024-06-27 21:24:24,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 21:24:24,765 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 587 transitions, 9192 flow [2024-06-27 21:24:24,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:24,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:24,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:24,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:24:24,766 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:24,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash 720196841, now seen corresponding path program 6 times [2024-06-27 21:24:24,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903659759] [2024-06-27 21:24:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903659759] [2024-06-27 21:24:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903659759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:27,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:27,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838069904] [2024-06-27 21:24:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:27,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:27,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:27,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 587 transitions, 9192 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:27,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:27,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:27,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:30,966 INFO L124 PetriNetUnfolderBase]: 5893/9362 cut-off events. [2024-06-27 21:24:30,966 INFO L125 PetriNetUnfolderBase]: For 1858874/1858874 co-relation queries the response was YES. [2024-06-27 21:24:31,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77434 conditions, 9362 events. 5893/9362 cut-off events. For 1858874/1858874 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60693 event pairs, 1520 based on Foata normal form. 2/9356 useless extension candidates. Maximal degree in co-relation 77253. Up to 8239 conditions per place. [2024-06-27 21:24:31,093 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 483 selfloop transitions, 124 changer transitions 0/612 dead transitions. [2024-06-27 21:24:31,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 612 transitions, 11006 flow [2024-06-27 21:24:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:24:31,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:24:31,095 INFO L175 Difference]: Start difference. First operand has 379 places, 587 transitions, 9192 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:24:31,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 612 transitions, 11006 flow [2024-06-27 21:24:35,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 612 transitions, 10691 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:24:35,175 INFO L231 Difference]: Finished difference. Result has 380 places, 590 transitions, 9199 flow [2024-06-27 21:24:35,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9199, PETRI_PLACES=380, PETRI_TRANSITIONS=590} [2024-06-27 21:24:35,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 21:24:35,176 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 590 transitions, 9199 flow [2024-06-27 21:24:35,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:35,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:35,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:35,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:24:35,176 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:35,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1992719799, now seen corresponding path program 7 times [2024-06-27 21:24:35,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:35,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467425491] [2024-06-27 21:24:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467425491] [2024-06-27 21:24:38,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467425491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:38,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:38,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177156054] [2024-06-27 21:24:38,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:38,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:38,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 590 transitions, 9199 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:38,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:38,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:38,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:41,254 INFO L124 PetriNetUnfolderBase]: 5887/9340 cut-off events. [2024-06-27 21:24:41,255 INFO L125 PetriNetUnfolderBase]: For 1874430/1874430 co-relation queries the response was YES. [2024-06-27 21:24:41,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77292 conditions, 9340 events. 5887/9340 cut-off events. For 1874430/1874430 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60457 event pairs, 1531 based on Foata normal form. 2/9334 useless extension candidates. Maximal degree in co-relation 77110. Up to 8236 conditions per place. [2024-06-27 21:24:41,410 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 484 selfloop transitions, 122 changer transitions 0/611 dead transitions. [2024-06-27 21:24:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 611 transitions, 10709 flow [2024-06-27 21:24:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:24:41,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-27 21:24:41,412 INFO L175 Difference]: Start difference. First operand has 380 places, 590 transitions, 9199 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:24:41,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 611 transitions, 10709 flow [2024-06-27 21:24:46,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 611 transitions, 10381 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 21:24:46,618 INFO L231 Difference]: Finished difference. Result has 382 places, 590 transitions, 9124 flow [2024-06-27 21:24:46,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8871, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9124, PETRI_PLACES=382, PETRI_TRANSITIONS=590} [2024-06-27 21:24:46,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-27 21:24:46,618 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 590 transitions, 9124 flow [2024-06-27 21:24:46,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:46,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:46,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:46,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:24:46,619 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:46,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1992927003, now seen corresponding path program 10 times [2024-06-27 21:24:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844864387] [2024-06-27 21:24:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:49,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844864387] [2024-06-27 21:24:49,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844864387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:49,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:49,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:49,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234977312] [2024-06-27 21:24:49,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:49,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:49,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:49,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:49,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:49,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 590 transitions, 9124 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:49,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:49,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:49,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:52,838 INFO L124 PetriNetUnfolderBase]: 5875/9356 cut-off events. [2024-06-27 21:24:52,838 INFO L125 PetriNetUnfolderBase]: For 1888567/1888567 co-relation queries the response was YES. [2024-06-27 21:24:52,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76834 conditions, 9356 events. 5875/9356 cut-off events. For 1888567/1888567 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60867 event pairs, 1640 based on Foata normal form. 4/9359 useless extension candidates. Maximal degree in co-relation 76652. Up to 8766 conditions per place. [2024-06-27 21:24:52,998 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 75 changer transitions 0/616 dead transitions. [2024-06-27 21:24:52,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 616 transitions, 10668 flow [2024-06-27 21:24:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:24:53,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:24:53,000 INFO L175 Difference]: Start difference. First operand has 382 places, 590 transitions, 9124 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:24:53,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 616 transitions, 10668 flow [2024-06-27 21:24:57,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 616 transitions, 10354 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:24:57,223 INFO L231 Difference]: Finished difference. Result has 382 places, 590 transitions, 8969 flow [2024-06-27 21:24:57,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8810, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8969, PETRI_PLACES=382, PETRI_TRANSITIONS=590} [2024-06-27 21:24:57,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-27 21:24:57,223 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 590 transitions, 8969 flow [2024-06-27 21:24:57,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:57,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:57,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:57,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:24:57,224 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:57,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:57,224 INFO L85 PathProgramCache]: Analyzing trace with hash -292231619, now seen corresponding path program 11 times [2024-06-27 21:24:57,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:57,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129331607] [2024-06-27 21:24:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:00,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129331607] [2024-06-27 21:25:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129331607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:00,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274318189] [2024-06-27 21:25:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:00,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:00,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:00,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 590 transitions, 8969 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:00,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:00,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:00,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:03,780 INFO L124 PetriNetUnfolderBase]: 5863/9336 cut-off events. [2024-06-27 21:25:03,780 INFO L125 PetriNetUnfolderBase]: For 1886851/1886851 co-relation queries the response was YES. [2024-06-27 21:25:03,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76127 conditions, 9336 events. 5863/9336 cut-off events. For 1886851/1886851 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60802 event pairs, 1642 based on Foata normal form. 4/9339 useless extension candidates. Maximal degree in co-relation 75944. Up to 8756 conditions per place. [2024-06-27 21:25:03,942 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 75 changer transitions 0/616 dead transitions. [2024-06-27 21:25:03,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 616 transitions, 10275 flow [2024-06-27 21:25:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:25:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:25:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:25:03,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-27 21:25:03,944 INFO L175 Difference]: Start difference. First operand has 382 places, 590 transitions, 8969 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:25:03,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 616 transitions, 10275 flow [2024-06-27 21:25:08,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 616 transitions, 10103 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:08,782 INFO L231 Difference]: Finished difference. Result has 385 places, 590 transitions, 8957 flow [2024-06-27 21:25:08,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8957, PETRI_PLACES=385, PETRI_TRANSITIONS=590} [2024-06-27 21:25:08,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 21:25:08,783 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 590 transitions, 8957 flow [2024-06-27 21:25:08,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:08,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:08,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:08,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:25:08,783 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:08,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash 903290457, now seen corresponding path program 1 times [2024-06-27 21:25:08,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:08,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310895011] [2024-06-27 21:25:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:08,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:11,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310895011] [2024-06-27 21:25:11,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310895011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:11,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:11,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373738372] [2024-06-27 21:25:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:11,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:11,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:11,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:11,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 590 transitions, 8957 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:11,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:11,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:11,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:15,076 INFO L124 PetriNetUnfolderBase]: 6054/9639 cut-off events. [2024-06-27 21:25:15,077 INFO L125 PetriNetUnfolderBase]: For 2126210/2126210 co-relation queries the response was YES. [2024-06-27 21:25:15,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81872 conditions, 9639 events. 6054/9639 cut-off events. For 2126210/2126210 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62826 event pairs, 1419 based on Foata normal form. 2/9639 useless extension candidates. Maximal degree in co-relation 81688. Up to 8182 conditions per place. [2024-06-27 21:25:15,217 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 479 selfloop transitions, 156 changer transitions 0/640 dead transitions. [2024-06-27 21:25:15,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 640 transitions, 10761 flow [2024-06-27 21:25:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:25:15,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:25:15,218 INFO L175 Difference]: Start difference. First operand has 385 places, 590 transitions, 8957 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:25:15,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 640 transitions, 10761 flow [2024-06-27 21:25:20,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 640 transitions, 10598 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:25:20,723 INFO L231 Difference]: Finished difference. Result has 385 places, 598 transitions, 9294 flow [2024-06-27 21:25:20,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8794, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9294, PETRI_PLACES=385, PETRI_TRANSITIONS=598} [2024-06-27 21:25:20,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 21:25:20,723 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 598 transitions, 9294 flow [2024-06-27 21:25:20,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:20,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:20,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:25:20,724 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:20,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash -450881249, now seen corresponding path program 2 times [2024-06-27 21:25:20,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:20,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792556401] [2024-06-27 21:25:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:23,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792556401] [2024-06-27 21:25:23,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792556401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:23,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:23,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:23,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938243443] [2024-06-27 21:25:23,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:23,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:23,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:23,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:23,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 598 transitions, 9294 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:23,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:23,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:23,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:27,194 INFO L124 PetriNetUnfolderBase]: 6049/9638 cut-off events. [2024-06-27 21:25:27,195 INFO L125 PetriNetUnfolderBase]: For 2150327/2150327 co-relation queries the response was YES. [2024-06-27 21:25:27,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82826 conditions, 9638 events. 6049/9638 cut-off events. For 2150327/2150327 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62905 event pairs, 1431 based on Foata normal form. 2/9638 useless extension candidates. Maximal degree in co-relation 82640. Up to 8408 conditions per place. [2024-06-27 21:25:27,335 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 474 selfloop transitions, 151 changer transitions 0/630 dead transitions. [2024-06-27 21:25:27,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 630 transitions, 10650 flow [2024-06-27 21:25:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:25:27,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:25:27,337 INFO L175 Difference]: Start difference. First operand has 385 places, 598 transitions, 9294 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:25:27,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 630 transitions, 10650 flow [2024-06-27 21:25:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 630 transitions, 10334 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:33,483 INFO L231 Difference]: Finished difference. Result has 388 places, 598 transitions, 9286 flow [2024-06-27 21:25:33,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8978, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9286, PETRI_PLACES=388, PETRI_TRANSITIONS=598} [2024-06-27 21:25:33,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-27 21:25:33,484 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 598 transitions, 9286 flow [2024-06-27 21:25:33,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:33,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:33,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:33,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:25:33,486 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:33,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1055751479, now seen corresponding path program 3 times [2024-06-27 21:25:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:33,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980556199] [2024-06-27 21:25:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:36,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:36,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980556199] [2024-06-27 21:25:36,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980556199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:36,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:36,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014129043] [2024-06-27 21:25:36,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:36,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:36,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:36,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:36,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 598 transitions, 9286 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:36,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:36,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:36,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:40,375 INFO L124 PetriNetUnfolderBase]: 6057/9642 cut-off events. [2024-06-27 21:25:40,376 INFO L125 PetriNetUnfolderBase]: For 2183974/2183974 co-relation queries the response was YES. [2024-06-27 21:25:40,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83005 conditions, 9642 events. 6057/9642 cut-off events. For 2183974/2183974 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 62865 event pairs, 1455 based on Foata normal form. 2/9642 useless extension candidates. Maximal degree in co-relation 82818. Up to 8420 conditions per place. [2024-06-27 21:25:40,510 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 151 changer transitions 0/632 dead transitions. [2024-06-27 21:25:40,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 632 transitions, 10685 flow [2024-06-27 21:25:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:25:40,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 21:25:40,542 INFO L175 Difference]: Start difference. First operand has 388 places, 598 transitions, 9286 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:25:40,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 632 transitions, 10685 flow [2024-06-27 21:25:46,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 632 transitions, 10420 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:46,187 INFO L231 Difference]: Finished difference. Result has 393 places, 600 transitions, 9372 flow [2024-06-27 21:25:46,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9021, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9372, PETRI_PLACES=393, PETRI_TRANSITIONS=600} [2024-06-27 21:25:46,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 21:25:46,189 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 600 transitions, 9372 flow [2024-06-27 21:25:46,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:46,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:46,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:46,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:25:46,191 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:46,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1663914697, now seen corresponding path program 4 times [2024-06-27 21:25:46,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:46,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469795386] [2024-06-27 21:25:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:49,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:49,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469795386] [2024-06-27 21:25:49,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469795386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:49,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398095525] [2024-06-27 21:25:49,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:49,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:49,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:49,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 600 transitions, 9372 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:49,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:49,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:49,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:52,964 INFO L124 PetriNetUnfolderBase]: 6101/9682 cut-off events. [2024-06-27 21:25:52,964 INFO L125 PetriNetUnfolderBase]: For 2297376/2297376 co-relation queries the response was YES. [2024-06-27 21:25:53,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83708 conditions, 9682 events. 6101/9682 cut-off events. For 2297376/2297376 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 63051 event pairs, 1682 based on Foata normal form. 12/9693 useless extension candidates. Maximal degree in co-relation 83520. Up to 9092 conditions per place. [2024-06-27 21:25:53,103 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 562 selfloop transitions, 54 changer transitions 11/632 dead transitions. [2024-06-27 21:25:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 632 transitions, 10785 flow [2024-06-27 21:25:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:25:53,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 21:25:53,105 INFO L175 Difference]: Start difference. First operand has 393 places, 600 transitions, 9372 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:25:53,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 632 transitions, 10785 flow [2024-06-27 21:25:59,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 632 transitions, 10585 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:59,420 INFO L231 Difference]: Finished difference. Result has 397 places, 596 transitions, 9163 flow [2024-06-27 21:25:59,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9172, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9163, PETRI_PLACES=397, PETRI_TRANSITIONS=596} [2024-06-27 21:25:59,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-27 21:25:59,421 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 596 transitions, 9163 flow [2024-06-27 21:25:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:59,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:59,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:59,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:25:59,421 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:59,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1261894495, now seen corresponding path program 12 times [2024-06-27 21:25:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399196596] [2024-06-27 21:25:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:02,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:02,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399196596] [2024-06-27 21:26:02,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399196596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:02,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:02,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:02,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177701171] [2024-06-27 21:26:02,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:02,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:02,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:02,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:02,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 596 transitions, 9163 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:02,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:02,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:02,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:06,307 INFO L124 PetriNetUnfolderBase]: 6037/9582 cut-off events. [2024-06-27 21:26:06,307 INFO L125 PetriNetUnfolderBase]: For 2239946/2239946 co-relation queries the response was YES. [2024-06-27 21:26:06,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82489 conditions, 9582 events. 6037/9582 cut-off events. For 2239946/2239946 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62249 event pairs, 1613 based on Foata normal form. 4/9572 useless extension candidates. Maximal degree in co-relation 82300. Up to 7014 conditions per place. [2024-06-27 21:26:06,449 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 332 selfloop transitions, 302 changer transitions 0/639 dead transitions. [2024-06-27 21:26:06,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 639 transitions, 11103 flow [2024-06-27 21:26:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:26:06,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:26:06,450 INFO L175 Difference]: Start difference. First operand has 397 places, 596 transitions, 9163 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:26:06,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 639 transitions, 11103 flow [2024-06-27 21:26:12,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 639 transitions, 10965 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:12,416 INFO L231 Difference]: Finished difference. Result has 399 places, 596 transitions, 9638 flow [2024-06-27 21:26:12,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9638, PETRI_PLACES=399, PETRI_TRANSITIONS=596} [2024-06-27 21:26:12,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 21:26:12,416 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 596 transitions, 9638 flow [2024-06-27 21:26:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:12,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:12,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:12,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:26:12,426 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:12,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1262014465, now seen corresponding path program 13 times [2024-06-27 21:26:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217686789] [2024-06-27 21:26:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:12,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:16,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:16,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217686789] [2024-06-27 21:26:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217686789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:16,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:16,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417321656] [2024-06-27 21:26:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:16,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:16,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 596 transitions, 9638 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:16,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:16,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:20,113 INFO L124 PetriNetUnfolderBase]: 6057/9612 cut-off events. [2024-06-27 21:26:20,113 INFO L125 PetriNetUnfolderBase]: For 2286713/2286713 co-relation queries the response was YES. [2024-06-27 21:26:20,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84256 conditions, 9612 events. 6057/9612 cut-off events. For 2286713/2286713 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 62514 event pairs, 1648 based on Foata normal form. 4/9600 useless extension candidates. Maximal degree in co-relation 84066. Up to 7026 conditions per place. [2024-06-27 21:26:20,259 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 330 selfloop transitions, 303 changer transitions 0/638 dead transitions. [2024-06-27 21:26:20,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 638 transitions, 11454 flow [2024-06-27 21:26:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:26:20,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:26:20,260 INFO L175 Difference]: Start difference. First operand has 399 places, 596 transitions, 9638 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:26:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 638 transitions, 11454 flow [2024-06-27 21:26:26,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 638 transitions, 10734 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:26,813 INFO L231 Difference]: Finished difference. Result has 400 places, 602 transitions, 9689 flow [2024-06-27 21:26:26,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8972, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9689, PETRI_PLACES=400, PETRI_TRANSITIONS=602} [2024-06-27 21:26:26,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 21:26:26,820 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 602 transitions, 9689 flow [2024-06-27 21:26:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:26,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:26,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:26:26,821 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1902358885, now seen corresponding path program 14 times [2024-06-27 21:26:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:26,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511533686] [2024-06-27 21:26:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:29,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511533686] [2024-06-27 21:26:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511533686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:29,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:29,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838942418] [2024-06-27 21:26:29,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:29,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:29,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:29,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:29,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 602 transitions, 9689 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:29,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:29,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:29,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:33,508 INFO L124 PetriNetUnfolderBase]: 6077/9644 cut-off events. [2024-06-27 21:26:33,509 INFO L125 PetriNetUnfolderBase]: For 2322149/2322149 co-relation queries the response was YES. [2024-06-27 21:26:33,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84291 conditions, 9644 events. 6077/9644 cut-off events. For 2322149/2322149 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 62733 event pairs, 1645 based on Foata normal form. 4/9632 useless extension candidates. Maximal degree in co-relation 84100. Up to 7038 conditions per place. [2024-06-27 21:26:33,655 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 326 selfloop transitions, 311 changer transitions 0/642 dead transitions. [2024-06-27 21:26:33,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 642 transitions, 11728 flow [2024-06-27 21:26:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:26:33,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:26:33,656 INFO L175 Difference]: Start difference. First operand has 400 places, 602 transitions, 9689 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:26:33,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 642 transitions, 11728 flow [2024-06-27 21:26:40,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 642 transitions, 11316 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:40,114 INFO L231 Difference]: Finished difference. Result has 404 places, 608 transitions, 10049 flow [2024-06-27 21:26:40,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9281, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10049, PETRI_PLACES=404, PETRI_TRANSITIONS=608} [2024-06-27 21:26:40,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-27 21:26:40,115 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 608 transitions, 10049 flow [2024-06-27 21:26:40,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:40,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:40,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:26:40,116 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:40,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1178014555, now seen corresponding path program 15 times [2024-06-27 21:26:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:40,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846406182] [2024-06-27 21:26:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:43,568 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 21:26:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846406182] [2024-06-27 21:26:43,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846406182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:43,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:43,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264103755] [2024-06-27 21:26:43,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:43,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:43,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:43,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 608 transitions, 10049 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:43,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:43,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:43,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:47,248 INFO L124 PetriNetUnfolderBase]: 6097/9676 cut-off events. [2024-06-27 21:26:47,248 INFO L125 PetriNetUnfolderBase]: For 2366918/2366922 co-relation queries the response was YES. [2024-06-27 21:26:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85106 conditions, 9676 events. 6097/9676 cut-off events. For 2366918/2366922 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62982 event pairs, 1339 based on Foata normal form. 8/9676 useless extension candidates. Maximal degree in co-relation 84912. Up to 7050 conditions per place. [2024-06-27 21:26:47,403 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 297 changer transitions 0/652 dead transitions. [2024-06-27 21:26:47,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 652 transitions, 12151 flow [2024-06-27 21:26:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:26:47,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:26:47,405 INFO L175 Difference]: Start difference. First operand has 404 places, 608 transitions, 10049 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:26:47,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 652 transitions, 12151 flow Killed by 15