./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.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/mutex-meet-nonrel/safe020_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe020_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_rmo.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-eb4cb34-m [2024-06-21 22:00:12,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:00:12,458 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:00:12,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:00:12,463 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:00:12,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:00:12,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:00:12,492 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:00:12,492 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:00:12,495 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:00:12,495 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:00:12,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:00:12,496 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:00:12,497 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:00:12,497 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:00:12,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:00:12,498 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:00:12,498 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:00:12,498 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:00:12,498 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:00:12,499 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:00:12,499 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:00:12,499 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:00:12,499 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:00:12,500 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:00:12,500 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:00:12,500 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:00:12,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:00:12,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:00:12,501 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:00:12,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:00:12,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:00:12,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:00:12,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:00:12,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:00:12,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:00:12,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:00:12,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:00:12,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:00:12,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:00:12,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:00:12,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:00:12,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:00:12,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:00:12,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:00:12,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:00:12,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:00:12,706 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:00:12,706 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:00:12,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_rmo.yml/witness.yml [2024-06-21 22:00:12,897 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:00:12,898 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:00:12,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-21 22:00:13,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:00:14,009 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:00:14,012 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-21 22:00:14,042 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf9a05c3d/323c5298080b452f83dfbeeb089ccf79/FLAG2e1650c3d [2024-06-21 22:00:14,051 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf9a05c3d/323c5298080b452f83dfbeeb089ccf79 [2024-06-21 22:00:14,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:00:14,059 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:00:14,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:00:14,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:00:14,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:00:14,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:00:12" (1/2) ... [2024-06-21 22:00:14,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6966f1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:00:14, skipping insertion in model container [2024-06-21 22:00:14,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:00:12" (1/2) ... [2024-06-21 22:00:14,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4953bbb2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:00:14, skipping insertion in model container [2024-06-21 22:00:14,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:00:14" (2/2) ... [2024-06-21 22:00:14,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6966f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14, skipping insertion in model container [2024-06-21 22:00:14,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:00:14" (2/2) ... [2024-06-21 22:00:14,073 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:00:14,193 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:00:14,194 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-21 22:00:14,194 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__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)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((y == 0 || y == 1) || y == 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))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-21 22:00:14,194 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-21 22:00:14,194 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:00:14,195 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-21 22:00:14,229 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:00:14,568 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:00:14,579 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:00:14,708 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:00:14,738 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:00:14,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14 WrapperNode [2024-06-21 22:00:14,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:00:14,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:00:14,739 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:00:14,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:00:14,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,761 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,792 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 207 [2024-06-21 22:00:14,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:00:14,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:00:14,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:00:14,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:00:14,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,807 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,824 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [45, 2]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 8 writes are split as follows [8, 0]. [2024-06-21 22:00:14,825 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:00:14,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:00:14,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:00:14,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:00:14,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (1/1) ... [2024-06-21 22:00:14,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:00:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:00:14,905 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) [2024-06-21 22:00:14,923 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 [2024-06-21 22:00:14,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 22:00:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 22:00:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 22:00:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 22:00:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:00:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:00:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:00:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:00:14,939 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:00:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:00:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:00:14,940 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:00:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:00:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 22:00:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:00:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:00:14,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:00:14,944 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 22:00:15,085 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:00:15,087 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:00:15,624 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:00:15,624 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:00:15,946 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:00:15,946 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:00:15,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:00:15 BoogieIcfgContainer [2024-06-21 22:00:15,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:00:15,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:00:15,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:00:15,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:00:15,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:00:12" (1/4) ... [2024-06-21 22:00:15,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420b4aac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:00:15, skipping insertion in model container [2024-06-21 22:00:15,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:00:14" (2/4) ... [2024-06-21 22:00:15,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420b4aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:00:15, skipping insertion in model container [2024-06-21 22:00:15,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:00:14" (3/4) ... [2024-06-21 22:00:15,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420b4aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:00:15, skipping insertion in model container [2024-06-21 22:00:15,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:00:15" (4/4) ... [2024-06-21 22:00:15,954 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2024-06-21 22:00:15,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:00:15,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 22:00:15,969 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:00:16,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:00:16,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 22:00:16,076 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 22:00:16,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:00:16,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:00:16,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 22:00:16,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 22:00:16,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:00:16,099 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;@60717fb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:00:16,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 22:00:16,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:00:16,103 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 22:00:16,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:00:16,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:16,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:00:16,104 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)] === [2024-06-21 22:00:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 756758017, now seen corresponding path program 1 times [2024-06-21 22:00:16,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660696129] [2024-06-21 22:00:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:17,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:17,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660696129] [2024-06-21 22:00:17,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660696129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:17,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:17,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:00:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288202394] [2024-06-21 22:00:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:17,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:00:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:00:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:00:17,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:00:17,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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) [2024-06-21 22:00:17,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:17,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:00:17,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:18,196 INFO L124 PetriNetUnfolderBase]: 1160/1782 cut-off events. [2024-06-21 22:00:18,197 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 22:00:18,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1782 events. 1160/1782 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8343 event pairs, 777 based on Foata normal form. 1/1753 useless extension candidates. Maximal degree in co-relation 3595. Up to 1748 conditions per place. [2024-06-21 22:00:18,207 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 22:00:18,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 183 flow [2024-06-21 22:00:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:00:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:00:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-21 22:00:18,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 22:00:18,217 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 69 transitions. [2024-06-21 22:00:18,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 183 flow [2024-06-21 22:00:18,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:18,222 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 22:00:18,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 22:00:18,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 22:00:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 22:00:18,226 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) [2024-06-21 22:00:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:18,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:00:18,226 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)] === [2024-06-21 22:00:18,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1395031872, now seen corresponding path program 1 times [2024-06-21 22:00:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851506367] [2024-06-21 22:00:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:19,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851506367] [2024-06-21 22:00:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851506367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:19,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:00:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451657153] [2024-06-21 22:00:19,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:00:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:00:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:00:19,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:00:19,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-06-21 22:00:19,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:19,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:00:19,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:19,781 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-21 22:00:19,781 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 22:00:19,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8301 event pairs, 521 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-21 22:00:19,789 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-21 22:00:19,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-21 22:00:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:00:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:00:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-21 22:00:19,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 22:00:19,791 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-21 22:00:19,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-21 22:00:19,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:00:19,793 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 22:00:19,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 22:00:19,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 22:00:19,793 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 22:00:19,793 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) [2024-06-21 22:00:19,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:19,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:19,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:00:19,794 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)] === [2024-06-21 22:00:19,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1415065022, now seen corresponding path program 1 times [2024-06-21 22:00:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:19,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045272477] [2024-06-21 22:00:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:22,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045272477] [2024-06-21 22:00:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045272477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:22,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:22,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:00:22,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19260229] [2024-06-21 22:00:22,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:00:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:22,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:00:22,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:00:22,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:00:22,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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) [2024-06-21 22:00:22,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:22,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:00:22,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:22,491 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-21 22:00:22,491 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-21 22:00:22,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8190 event pairs, 375 based on Foata normal form. 6/1754 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-21 22:00:22,499 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 22:00:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-21 22:00:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 22:00:22,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-21 22:00:22,501 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-21 22:00:22,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-21 22:00:22,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 22:00:22,504 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 22:00:22,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 22:00:22,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 22:00:22,504 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 22:00:22,505 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) [2024-06-21 22:00:22,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:22,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:22,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:00:22,505 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)] === [2024-06-21 22:00:22,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1255441540, now seen corresponding path program 1 times [2024-06-21 22:00:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:22,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194510333] [2024-06-21 22:00:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:23,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194510333] [2024-06-21 22:00:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194510333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:23,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:23,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:00:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404541542] [2024-06-21 22:00:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:00:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:00:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:00:23,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:23,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 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) [2024-06-21 22:00:23,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:23,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:23,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:24,629 INFO L124 PetriNetUnfolderBase]: 1129/1735 cut-off events. [2024-06-21 22:00:24,629 INFO L125 PetriNetUnfolderBase]: For 1864/1864 co-relation queries the response was YES. [2024-06-21 22:00:24,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4907 conditions, 1735 events. 1129/1735 cut-off events. For 1864/1864 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8075 event pairs, 446 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 4890. Up to 1679 conditions per place. [2024-06-21 22:00:24,638 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 22:00:24,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 343 flow [2024-06-21 22:00:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:00:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:00:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 22:00:24,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:00:24,640 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 90 transitions. [2024-06-21 22:00:24,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 343 flow [2024-06-21 22:00:24,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 316 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:24,643 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 22:00:24,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 22:00:24,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 22:00:24,644 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 22:00:24,644 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) [2024-06-21 22:00:24,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:24,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:24,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:00:24,645 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)] === [2024-06-21 22:00:24,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1178942951, now seen corresponding path program 1 times [2024-06-21 22:00:24,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:24,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661243733] [2024-06-21 22:00:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:24,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:26,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:26,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661243733] [2024-06-21 22:00:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661243733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:00:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31539289] [2024-06-21 22:00:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:26,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:00:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:00:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:00:26,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:26,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 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) [2024-06-21 22:00:26,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:26,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:26,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:27,383 INFO L124 PetriNetUnfolderBase]: 1155/1787 cut-off events. [2024-06-21 22:00:27,384 INFO L125 PetriNetUnfolderBase]: For 2713/2715 co-relation queries the response was YES. [2024-06-21 22:00:27,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 1787 events. 1155/1787 cut-off events. For 2713/2715 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8373 event pairs, 420 based on Foata normal form. 6/1792 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-21 22:00:27,392 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-21 22:00:27,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 466 flow [2024-06-21 22:00:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 22:00:27,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 22:00:27,394 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 116 transitions. [2024-06-21 22:00:27,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 466 flow [2024-06-21 22:00:27,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:27,397 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-21 22:00:27,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-21 22:00:27,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 22:00:27,398 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-21 22:00:27,398 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) [2024-06-21 22:00:27,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:27,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:27,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:00:27,399 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)] === [2024-06-21 22:00:27,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:27,399 INFO L85 PathProgramCache]: Analyzing trace with hash 415466575, now seen corresponding path program 2 times [2024-06-21 22:00:27,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:27,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393823458] [2024-06-21 22:00:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393823458] [2024-06-21 22:00:28,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393823458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:28,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:28,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:00:28,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915973951] [2024-06-21 22:00:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:28,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:00:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:00:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:00:28,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:28,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 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) [2024-06-21 22:00:28,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:28,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:28,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:29,866 INFO L124 PetriNetUnfolderBase]: 1145/1764 cut-off events. [2024-06-21 22:00:29,866 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-21 22:00:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1764 events. 1145/1764 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8244 event pairs, 419 based on Foata normal form. 4/1766 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-21 22:00:29,875 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-21 22:00:29,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 446 flow [2024-06-21 22:00:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 22:00:29,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 22:00:29,878 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 109 transitions. [2024-06-21 22:00:29,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 446 flow [2024-06-21 22:00:29,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 416 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 22:00:29,884 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-21 22:00:29,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-21 22:00:29,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 22:00:29,887 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-21 22:00:29,887 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) [2024-06-21 22:00:29,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:29,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:29,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:00:29,887 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)] === [2024-06-21 22:00:29,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash 406538203, now seen corresponding path program 1 times [2024-06-21 22:00:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:29,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182755337] [2024-06-21 22:00:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:32,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182755337] [2024-06-21 22:00:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182755337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:32,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700614572] [2024-06-21 22:00:32,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:32,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 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) [2024-06-21 22:00:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:32,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:32,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:33,065 INFO L124 PetriNetUnfolderBase]: 1137/1759 cut-off events. [2024-06-21 22:00:33,065 INFO L125 PetriNetUnfolderBase]: For 4532/4532 co-relation queries the response was YES. [2024-06-21 22:00:33,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 1759 events. 1137/1759 cut-off events. For 4532/4532 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8210 event pairs, 406 based on Foata normal form. 4/1762 useless extension candidates. Maximal degree in co-relation 5868. Up to 1669 conditions per place. [2024-06-21 22:00:33,076 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-21 22:00:33,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 478 flow [2024-06-21 22:00:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 22:00:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:00:33,078 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 106 transitions. [2024-06-21 22:00:33,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 478 flow [2024-06-21 22:00:33,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 434 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:33,084 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 275 flow [2024-06-21 22:00:33,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 22:00:33,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 22:00:33,085 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 275 flow [2024-06-21 22:00:33,086 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) [2024-06-21 22:00:33,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:33,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:33,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:00:33,086 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)] === [2024-06-21 22:00:33,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1391225876, now seen corresponding path program 1 times [2024-06-21 22:00:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:33,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168728066] [2024-06-21 22:00:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:33,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:35,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168728066] [2024-06-21 22:00:35,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168728066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:35,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:35,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:35,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088978848] [2024-06-21 22:00:35,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:35,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:35,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:35,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:35,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:35,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 275 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) [2024-06-21 22:00:35,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:35,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:35,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:36,436 INFO L124 PetriNetUnfolderBase]: 1163/1803 cut-off events. [2024-06-21 22:00:36,437 INFO L125 PetriNetUnfolderBase]: For 5839/5839 co-relation queries the response was YES. [2024-06-21 22:00:36,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 1803 events. 1163/1803 cut-off events. For 5839/5839 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8497 event pairs, 436 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 6208. Up to 1691 conditions per place. [2024-06-21 22:00:36,457 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-21 22:00:36,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 549 flow [2024-06-21 22:00:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:00:36,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 22:00:36,462 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 275 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:00:36,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 549 flow [2024-06-21 22:00:36,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 22:00:36,467 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 310 flow [2024-06-21 22:00:36,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 22:00:36,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 22:00:36,470 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 310 flow [2024-06-21 22:00:36,470 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) [2024-06-21 22:00:36,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:36,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:36,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:00:36,471 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)] === [2024-06-21 22:00:36,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 907231256, now seen corresponding path program 2 times [2024-06-21 22:00:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9784149] [2024-06-21 22:00:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:38,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:38,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9784149] [2024-06-21 22:00:38,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9784149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:38,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:38,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292836435] [2024-06-21 22:00:38,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:38,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:38,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:38,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:38,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 310 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) [2024-06-21 22:00:38,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:38,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:38,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:39,750 INFO L124 PetriNetUnfolderBase]: 1189/1861 cut-off events. [2024-06-21 22:00:39,751 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-21 22:00:39,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 1861 events. 1189/1861 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8899 event pairs, 380 based on Foata normal form. 8/1868 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-21 22:00:39,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 22:00:39,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 666 flow [2024-06-21 22:00:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 22:00:39,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 22:00:39,761 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 310 flow. Second operand 7 states and 135 transitions. [2024-06-21 22:00:39,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 666 flow [2024-06-21 22:00:39,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:39,766 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 394 flow [2024-06-21 22:00:39,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-21 22:00:39,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 22:00:39,767 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 394 flow [2024-06-21 22:00:39,767 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) [2024-06-21 22:00:39,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:39,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:39,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:00:39,768 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)] === [2024-06-21 22:00:39,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1386457332, now seen corresponding path program 1 times [2024-06-21 22:00:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480253181] [2024-06-21 22:00:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:39,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:42,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480253181] [2024-06-21 22:00:42,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480253181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:42,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:42,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:42,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307930739] [2024-06-21 22:00:42,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:42,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:42,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 394 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) [2024-06-21 22:00:42,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:42,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:42,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:43,614 INFO L124 PetriNetUnfolderBase]: 1209/1893 cut-off events. [2024-06-21 22:00:43,614 INFO L125 PetriNetUnfolderBase]: For 9939/9943 co-relation queries the response was YES. [2024-06-21 22:00:43,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1893 events. 1209/1893 cut-off events. For 9939/9943 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9059 event pairs, 391 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-21 22:00:43,624 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-06-21 22:00:43,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 676 flow [2024-06-21 22:00:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:00:43,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 22:00:43,626 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 394 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:00:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 676 flow [2024-06-21 22:00:43,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 636 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:43,634 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 423 flow [2024-06-21 22:00:43,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-21 22:00:43,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 22:00:43,635 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 423 flow [2024-06-21 22:00:43,635 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) [2024-06-21 22:00:43,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:43,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:43,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:00:43,637 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)] === [2024-06-21 22:00:43,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash -113127670, now seen corresponding path program 3 times [2024-06-21 22:00:43,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:43,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545861949] [2024-06-21 22:00:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:45,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:45,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545861949] [2024-06-21 22:00:45,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545861949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:45,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:45,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769944391] [2024-06-21 22:00:45,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:45,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:45,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:45,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:45,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 423 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) [2024-06-21 22:00:45,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:45,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:45,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:46,827 INFO L124 PetriNetUnfolderBase]: 1199/1863 cut-off events. [2024-06-21 22:00:46,827 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-21 22:00:46,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1863 events. 1199/1863 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8923 event pairs, 392 based on Foata normal form. 4/1864 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-21 22:00:46,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-21 22:00:46,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 661 flow [2024-06-21 22:00:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:00:46,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 22:00:46,837 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 423 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:00:46,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 661 flow [2024-06-21 22:00:46,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 594 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:46,844 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 416 flow [2024-06-21 22:00:46,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-21 22:00:46,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 22:00:46,844 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 416 flow [2024-06-21 22:00:46,844 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) [2024-06-21 22:00:46,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:46,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:46,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:00:46,845 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)] === [2024-06-21 22:00:46,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -159068484, now seen corresponding path program 2 times [2024-06-21 22:00:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:46,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791036836] [2024-06-21 22:00:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:46,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791036836] [2024-06-21 22:00:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791036836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:49,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555220274] [2024-06-21 22:00:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:49,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 416 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) [2024-06-21 22:00:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:49,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:50,424 INFO L124 PetriNetUnfolderBase]: 1219/1914 cut-off events. [2024-06-21 22:00:50,425 INFO L125 PetriNetUnfolderBase]: For 13028/13028 co-relation queries the response was YES. [2024-06-21 22:00:50,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7847 conditions, 1914 events. 1219/1914 cut-off events. For 13028/13028 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9262 event pairs, 398 based on Foata normal form. 4/1916 useless extension candidates. Maximal degree in co-relation 7820. Up to 1726 conditions per place. [2024-06-21 22:00:50,434 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 71 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-21 22:00:50,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 684 flow [2024-06-21 22:00:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:00:50,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 22:00:50,436 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 416 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:00:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 684 flow [2024-06-21 22:00:50,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 616 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:50,444 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 421 flow [2024-06-21 22:00:50,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-21 22:00:50,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 22:00:50,445 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 421 flow [2024-06-21 22:00:50,445 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) [2024-06-21 22:00:50,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:50,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:50,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:00:50,446 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)] === [2024-06-21 22:00:50,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash -158771814, now seen corresponding path program 3 times [2024-06-21 22:00:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960380069] [2024-06-21 22:00:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960380069] [2024-06-21 22:00:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960380069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:52,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635487964] [2024-06-21 22:00:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:53,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:53,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 421 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) [2024-06-21 22:00:53,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:53,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:53,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:53,797 INFO L124 PetriNetUnfolderBase]: 1211/1896 cut-off events. [2024-06-21 22:00:53,798 INFO L125 PetriNetUnfolderBase]: For 14763/14763 co-relation queries the response was YES. [2024-06-21 22:00:53,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1896 events. 1211/1896 cut-off events. For 14763/14763 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9126 event pairs, 366 based on Foata normal form. 4/1898 useless extension candidates. Maximal degree in co-relation 7920. Up to 1642 conditions per place. [2024-06-21 22:00:53,835 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-21 22:00:53,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 697 flow [2024-06-21 22:00:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:00:53,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 22:00:53,837 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 421 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:00:53,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 697 flow [2024-06-21 22:00:53,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 642 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:53,846 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 453 flow [2024-06-21 22:00:53,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-21 22:00:53,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 22:00:53,847 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 453 flow [2024-06-21 22:00:53,848 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) [2024-06-21 22:00:53,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:53,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:00:53,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:53,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1971009202, now seen corresponding path program 1 times [2024-06-21 22:00:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403148802] [2024-06-21 22:00:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:55,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403148802] [2024-06-21 22:00:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403148802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:55,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:00:55,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759285743] [2024-06-21 22:00:55,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:55,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:00:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:00:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:00:55,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:55,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 453 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) [2024-06-21 22:00:55,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:55,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:55,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:56,165 INFO L124 PetriNetUnfolderBase]: 1208/1905 cut-off events. [2024-06-21 22:00:56,165 INFO L125 PetriNetUnfolderBase]: For 16387/16387 co-relation queries the response was YES. [2024-06-21 22:00:56,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8183 conditions, 1905 events. 1208/1905 cut-off events. For 16387/16387 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9244 event pairs, 434 based on Foata normal form. 1/1905 useless extension candidates. Maximal degree in co-relation 8154. Up to 1820 conditions per place. [2024-06-21 22:00:56,173 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 69 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-06-21 22:00:56,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 649 flow [2024-06-21 22:00:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:00:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:00:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 22:00:56,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:00:56,179 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 453 flow. Second operand 5 states and 84 transitions. [2024-06-21 22:00:56,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 649 flow [2024-06-21 22:00:56,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 580 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:56,190 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 430 flow [2024-06-21 22:00:56,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-21 22:00:56,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 22:00:56,192 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 430 flow [2024-06-21 22:00:56,192 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) [2024-06-21 22:00:56,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:56,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:56,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:00:56,192 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)] === [2024-06-21 22:00:56,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:56,193 INFO L85 PathProgramCache]: Analyzing trace with hash -992296955, now seen corresponding path program 1 times [2024-06-21 22:00:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:56,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451895873] [2024-06-21 22:00:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:58,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451895873] [2024-06-21 22:00:58,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451895873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:58,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:58,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:00:58,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885193387] [2024-06-21 22:00:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:58,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:00:58,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:00:58,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:00:58,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:58,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 430 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) [2024-06-21 22:00:58,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:58,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:58,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:59,181 INFO L124 PetriNetUnfolderBase]: 1230/1931 cut-off events. [2024-06-21 22:00:59,182 INFO L125 PetriNetUnfolderBase]: For 18031/18031 co-relation queries the response was YES. [2024-06-21 22:00:59,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8460 conditions, 1931 events. 1230/1931 cut-off events. For 18031/18031 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9363 event pairs, 444 based on Foata normal form. 6/1934 useless extension candidates. Maximal degree in co-relation 8430. Up to 1749 conditions per place. [2024-06-21 22:00:59,191 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 72 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-21 22:00:59,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 746 flow [2024-06-21 22:00:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 22:00:59,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:00:59,192 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 430 flow. Second operand 6 states and 106 transitions. [2024-06-21 22:00:59,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 746 flow [2024-06-21 22:00:59,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 722 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:59,203 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 526 flow [2024-06-21 22:00:59,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-21 22:00:59,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 22:00:59,204 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 526 flow [2024-06-21 22:00:59,205 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) [2024-06-21 22:00:59,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:59,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:59,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:00:59,205 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)] === [2024-06-21 22:00:59,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash -751562797, now seen corresponding path program 1 times [2024-06-21 22:00:59,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:59,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745744532] [2024-06-21 22:00:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:00,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:00,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745744532] [2024-06-21 22:01:00,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745744532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:00,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:00,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232749732] [2024-06-21 22:01:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:00,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:00,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:00,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 526 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) [2024-06-21 22:01:00,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:00,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:02,119 INFO L124 PetriNetUnfolderBase]: 1485/2364 cut-off events. [2024-06-21 22:01:02,119 INFO L125 PetriNetUnfolderBase]: For 25890/25890 co-relation queries the response was YES. [2024-06-21 22:01:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11058 conditions, 2364 events. 1485/2364 cut-off events. For 25890/25890 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12183 event pairs, 473 based on Foata normal form. 16/2379 useless extension candidates. Maximal degree in co-relation 11026. Up to 1851 conditions per place. [2024-06-21 22:01:02,130 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 27 changer transitions 0/159 dead transitions. [2024-06-21 22:01:02,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 159 transitions, 1174 flow [2024-06-21 22:01:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 22:01:02,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 22:01:02,132 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 526 flow. Second operand 11 states and 207 transitions. [2024-06-21 22:01:02,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 159 transitions, 1174 flow [2024-06-21 22:01:02,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 159 transitions, 1137 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 22:01:02,145 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 680 flow [2024-06-21 22:01:02,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=680, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-21 22:01:02,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 22:01:02,146 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 680 flow [2024-06-21 22:01:02,148 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) [2024-06-21 22:01:02,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:02,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:02,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:01:02,148 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)] === [2024-06-21 22:01:02,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -312868329, now seen corresponding path program 2 times [2024-06-21 22:01:02,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:02,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373329516] [2024-06-21 22:01:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:02,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373329516] [2024-06-21 22:01:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373329516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:04,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:04,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63449372] [2024-06-21 22:01:04,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:04,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:04,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:04,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 680 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) [2024-06-21 22:01:04,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:04,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:04,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:05,703 INFO L124 PetriNetUnfolderBase]: 1677/2684 cut-off events. [2024-06-21 22:01:05,703 INFO L125 PetriNetUnfolderBase]: For 34697/34697 co-relation queries the response was YES. [2024-06-21 22:01:05,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13304 conditions, 2684 events. 1677/2684 cut-off events. For 34697/34697 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14328 event pairs, 412 based on Foata normal form. 16/2699 useless extension candidates. Maximal degree in co-relation 13267. Up to 1829 conditions per place. [2024-06-21 22:01:05,715 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-21 22:01:05,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 148 transitions, 1254 flow [2024-06-21 22:01:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 22:01:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 22:01:05,717 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 680 flow. Second operand 9 states and 170 transitions. [2024-06-21 22:01:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 148 transitions, 1254 flow [2024-06-21 22:01:05,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 148 transitions, 1215 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:05,731 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 759 flow [2024-06-21 22:01:05,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=759, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2024-06-21 22:01:05,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 22:01:05,732 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 759 flow [2024-06-21 22:01:05,732 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) [2024-06-21 22:01:05,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:05,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:05,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:01:05,733 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)] === [2024-06-21 22:01:05,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash -199783495, now seen corresponding path program 3 times [2024-06-21 22:01:05,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:05,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521644411] [2024-06-21 22:01:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:08,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:08,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521644411] [2024-06-21 22:01:08,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521644411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:08,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:08,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:08,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368701580] [2024-06-21 22:01:08,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:08,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:08,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:08,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:08,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 759 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) [2024-06-21 22:01:08,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:08,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:08,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:09,263 INFO L124 PetriNetUnfolderBase]: 1605/2574 cut-off events. [2024-06-21 22:01:09,263 INFO L125 PetriNetUnfolderBase]: For 35207/35207 co-relation queries the response was YES. [2024-06-21 22:01:09,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12448 conditions, 2574 events. 1605/2574 cut-off events. For 35207/35207 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13635 event pairs, 547 based on Foata normal form. 40/2613 useless extension candidates. Maximal degree in co-relation 12409. Up to 2101 conditions per place. [2024-06-21 22:01:09,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2024-06-21 22:01:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 137 transitions, 1163 flow [2024-06-21 22:01:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:01:09,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:01:09,277 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 759 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:01:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 137 transitions, 1163 flow [2024-06-21 22:01:09,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 1096 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:09,307 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 746 flow [2024-06-21 22:01:09,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=746, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-21 22:01:09,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 22:01:09,308 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 746 flow [2024-06-21 22:01:09,308 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) [2024-06-21 22:01:09,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:09,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:09,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:01:09,309 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)] === [2024-06-21 22:01:09,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -29081065, now seen corresponding path program 4 times [2024-06-21 22:01:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990471942] [2024-06-21 22:01:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990471942] [2024-06-21 22:01:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990471942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:11,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70177559] [2024-06-21 22:01:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:11,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:11,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:11,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 746 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) [2024-06-21 22:01:11,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:11,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:12,868 INFO L124 PetriNetUnfolderBase]: 1693/2734 cut-off events. [2024-06-21 22:01:12,868 INFO L125 PetriNetUnfolderBase]: For 32060/32064 co-relation queries the response was YES. [2024-06-21 22:01:12,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12937 conditions, 2734 events. 1693/2734 cut-off events. For 32060/32064 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14708 event pairs, 458 based on Foata normal form. 24/2757 useless extension candidates. Maximal degree in co-relation 12897. Up to 2267 conditions per place. [2024-06-21 22:01:12,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-21 22:01:12,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 138 transitions, 1176 flow [2024-06-21 22:01:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 22:01:12,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:01:12,884 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 746 flow. Second operand 8 states and 152 transitions. [2024-06-21 22:01:12,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 138 transitions, 1176 flow [2024-06-21 22:01:12,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1122 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:12,904 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 793 flow [2024-06-21 22:01:12,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2024-06-21 22:01:12,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 22:01:12,905 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 793 flow [2024-06-21 22:01:12,905 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) [2024-06-21 22:01:12,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:12,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:12,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:01:12,905 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)] === [2024-06-21 22:01:12,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash -945593269, now seen corresponding path program 1 times [2024-06-21 22:01:12,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:12,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033193236] [2024-06-21 22:01:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:12,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033193236] [2024-06-21 22:01:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033193236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:15,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39498596] [2024-06-21 22:01:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:15,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:15,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:15,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 793 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) [2024-06-21 22:01:15,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:15,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:15,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:17,128 INFO L124 PetriNetUnfolderBase]: 1741/2818 cut-off events. [2024-06-21 22:01:17,128 INFO L125 PetriNetUnfolderBase]: For 34750/34754 co-relation queries the response was YES. [2024-06-21 22:01:17,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13530 conditions, 2818 events. 1741/2818 cut-off events. For 34750/34754 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15400 event pairs, 447 based on Foata normal form. 16/2833 useless extension candidates. Maximal degree in co-relation 13489. Up to 1953 conditions per place. [2024-06-21 22:01:17,143 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-21 22:01:17,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1243 flow [2024-06-21 22:01:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 22:01:17,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 22:01:17,145 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 793 flow. Second operand 8 states and 153 transitions. [2024-06-21 22:01:17,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1243 flow [2024-06-21 22:01:17,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 141 transitions, 1166 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:17,168 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 826 flow [2024-06-21 22:01:17,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2024-06-21 22:01:17,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 22:01:17,169 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 826 flow [2024-06-21 22:01:17,169 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) [2024-06-21 22:01:17,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:17,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:17,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:01:17,170 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:17,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash -707874277, now seen corresponding path program 1 times [2024-06-21 22:01:17,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:17,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022156894] [2024-06-21 22:01:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:19,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:19,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022156894] [2024-06-21 22:01:19,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022156894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:19,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:19,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:19,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141677828] [2024-06-21 22:01:19,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:19,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:19,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:19,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:19,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 826 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) [2024-06-21 22:01:19,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:19,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:19,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:20,234 INFO L124 PetriNetUnfolderBase]: 1806/2923 cut-off events. [2024-06-21 22:01:20,234 INFO L125 PetriNetUnfolderBase]: For 36162/36162 co-relation queries the response was YES. [2024-06-21 22:01:20,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14249 conditions, 2923 events. 1806/2923 cut-off events. For 36162/36162 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16069 event pairs, 573 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14207. Up to 2642 conditions per place. [2024-06-21 22:01:20,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 35 changer transitions 0/140 dead transitions. [2024-06-21 22:01:20,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 140 transitions, 1449 flow [2024-06-21 22:01:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:01:20,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 22:01:20,249 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 826 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:01:20,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 140 transitions, 1449 flow [2024-06-21 22:01:20,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 140 transitions, 1337 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:20,276 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 1016 flow [2024-06-21 22:01:20,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1016, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-06-21 22:01:20,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 22:01:20,277 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 1016 flow [2024-06-21 22:01:20,277 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) [2024-06-21 22:01:20,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:20,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:20,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:01:20,278 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:20,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1917037087, now seen corresponding path program 2 times [2024-06-21 22:01:20,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:20,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384435863] [2024-06-21 22:01:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:20,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384435863] [2024-06-21 22:01:22,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384435863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:22,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:22,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497892509] [2024-06-21 22:01:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:22,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:22,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:22,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 1016 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) [2024-06-21 22:01:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:23,087 INFO L124 PetriNetUnfolderBase]: 1828/2961 cut-off events. [2024-06-21 22:01:23,087 INFO L125 PetriNetUnfolderBase]: For 37427/37427 co-relation queries the response was YES. [2024-06-21 22:01:23,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14551 conditions, 2961 events. 1828/2961 cut-off events. For 37427/37427 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16329 event pairs, 607 based on Foata normal form. 2/2961 useless extension candidates. Maximal degree in co-relation 14505. Up to 2657 conditions per place. [2024-06-21 22:01:23,103 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 48 changer transitions 0/155 dead transitions. [2024-06-21 22:01:23,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 155 transitions, 1588 flow [2024-06-21 22:01:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 22:01:23,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 22:01:23,105 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 1016 flow. Second operand 7 states and 134 transitions. [2024-06-21 22:01:23,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 155 transitions, 1588 flow [2024-06-21 22:01:23,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 155 transitions, 1525 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 22:01:23,130 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1236 flow [2024-06-21 22:01:23,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1236, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2024-06-21 22:01:23,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 22:01:23,131 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1236 flow [2024-06-21 22:01:23,131 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) [2024-06-21 22:01:23,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:23,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:23,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:01:23,131 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)] === [2024-06-21 22:01:23,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1909169159, now seen corresponding path program 5 times [2024-06-21 22:01:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:23,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714142873] [2024-06-21 22:01:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:25,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:25,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714142873] [2024-06-21 22:01:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714142873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:25,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:25,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:25,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965749415] [2024-06-21 22:01:25,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:25,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:25,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:25,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:25,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:25,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1236 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) [2024-06-21 22:01:25,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:25,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:25,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:26,866 INFO L124 PetriNetUnfolderBase]: 1860/3020 cut-off events. [2024-06-21 22:01:26,867 INFO L125 PetriNetUnfolderBase]: For 43796/43796 co-relation queries the response was YES. [2024-06-21 22:01:26,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15080 conditions, 3020 events. 1860/3020 cut-off events. For 43796/43796 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16746 event pairs, 464 based on Foata normal form. 20/3035 useless extension candidates. Maximal degree in co-relation 15030. Up to 2479 conditions per place. [2024-06-21 22:01:26,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 47 changer transitions 0/162 dead transitions. [2024-06-21 22:01:26,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 162 transitions, 1710 flow [2024-06-21 22:01:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:01:26,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:01:26,884 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1236 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:01:26,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 162 transitions, 1710 flow [2024-06-21 22:01:26,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 162 transitions, 1653 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 22:01:26,908 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1312 flow [2024-06-21 22:01:26,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1312, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-21 22:01:26,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 22:01:26,908 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1312 flow [2024-06-21 22:01:26,909 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) [2024-06-21 22:01:26,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:26,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:26,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:01:26,909 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:26,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1754050555, now seen corresponding path program 2 times [2024-06-21 22:01:26,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:26,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840516861] [2024-06-21 22:01:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:26,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:29,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:29,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840516861] [2024-06-21 22:01:29,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840516861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:29,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:29,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643261674] [2024-06-21 22:01:29,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:29,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:29,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:29,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:29,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1312 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) [2024-06-21 22:01:29,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:29,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:29,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:31,003 INFO L124 PetriNetUnfolderBase]: 1908/3116 cut-off events. [2024-06-21 22:01:31,003 INFO L125 PetriNetUnfolderBase]: For 47697/47697 co-relation queries the response was YES. [2024-06-21 22:01:31,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15751 conditions, 3116 events. 1908/3116 cut-off events. For 47697/47697 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17500 event pairs, 464 based on Foata normal form. 12/3123 useless extension candidates. Maximal degree in co-relation 15700. Up to 2457 conditions per place. [2024-06-21 22:01:31,018 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-06-21 22:01:31,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 165 transitions, 1806 flow [2024-06-21 22:01:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:01:31,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:01:31,029 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1312 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:01:31,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 165 transitions, 1806 flow [2024-06-21 22:01:31,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 165 transitions, 1697 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:31,066 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1341 flow [2024-06-21 22:01:31,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1341, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2024-06-21 22:01:31,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 22:01:31,067 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1341 flow [2024-06-21 22:01:31,067 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) [2024-06-21 22:01:31,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:31,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:31,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:01:31,067 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)] === [2024-06-21 22:01:31,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1533661509, now seen corresponding path program 3 times [2024-06-21 22:01:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:31,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200717185] [2024-06-21 22:01:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:33,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200717185] [2024-06-21 22:01:33,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200717185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:33,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:33,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:33,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746382626] [2024-06-21 22:01:33,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:33,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:33,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:33,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:33,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:33,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:33,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1341 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) [2024-06-21 22:01:33,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:33,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:33,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:35,109 INFO L124 PetriNetUnfolderBase]: 1888/3084 cut-off events. [2024-06-21 22:01:35,109 INFO L125 PetriNetUnfolderBase]: For 47260/47260 co-relation queries the response was YES. [2024-06-21 22:01:35,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 3084 events. 1888/3084 cut-off events. For 47260/47260 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17274 event pairs, 345 based on Foata normal form. 12/3091 useless extension candidates. Maximal degree in co-relation 15290. Up to 1747 conditions per place. [2024-06-21 22:01:35,128 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 57 changer transitions 0/164 dead transitions. [2024-06-21 22:01:35,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 164 transitions, 1761 flow [2024-06-21 22:01:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:01:35,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:01:35,130 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1341 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:01:35,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 164 transitions, 1761 flow [2024-06-21 22:01:35,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 164 transitions, 1641 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:35,167 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 1299 flow [2024-06-21 22:01:35,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-06-21 22:01:35,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 22:01:35,167 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 1299 flow [2024-06-21 22:01:35,167 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) [2024-06-21 22:01:35,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:35,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:35,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:01:35,168 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:35,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash -696446437, now seen corresponding path program 3 times [2024-06-21 22:01:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:35,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632281884] [2024-06-21 22:01:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:35,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:37,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:37,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632281884] [2024-06-21 22:01:37,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632281884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:37,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:37,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:37,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867985717] [2024-06-21 22:01:37,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:37,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:37,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:37,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:37,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 1299 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) [2024-06-21 22:01:37,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:37,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:38,260 INFO L124 PetriNetUnfolderBase]: 1862/3040 cut-off events. [2024-06-21 22:01:38,260 INFO L125 PetriNetUnfolderBase]: For 46769/46769 co-relation queries the response was YES. [2024-06-21 22:01:38,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 3040 events. 1862/3040 cut-off events. For 46769/46769 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17041 event pairs, 592 based on Foata normal form. 6/3041 useless extension candidates. Maximal degree in co-relation 15034. Up to 2750 conditions per place. [2024-06-21 22:01:38,277 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 42 changer transitions 0/140 dead transitions. [2024-06-21 22:01:38,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 140 transitions, 1623 flow [2024-06-21 22:01:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:01:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:01:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 22:01:38,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:01:38,279 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 1299 flow. Second operand 6 states and 104 transitions. [2024-06-21 22:01:38,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 140 transitions, 1623 flow [2024-06-21 22:01:38,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 140 transitions, 1449 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:38,309 INFO L231 Difference]: Finished difference. Result has 116 places, 126 transitions, 1217 flow [2024-06-21 22:01:38,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=116, PETRI_TRANSITIONS=126} [2024-06-21 22:01:38,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 22:01:38,310 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 126 transitions, 1217 flow [2024-06-21 22:01:38,310 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) [2024-06-21 22:01:38,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:38,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:38,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:01:38,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:38,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1431307417, now seen corresponding path program 1 times [2024-06-21 22:01:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:38,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206041694] [2024-06-21 22:01:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:38,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:40,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:40,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206041694] [2024-06-21 22:01:40,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206041694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:40,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:40,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:40,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471133876] [2024-06-21 22:01:40,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:40,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:40,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:40,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:40,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:40,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 126 transitions, 1217 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) [2024-06-21 22:01:40,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:40,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:40,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:41,292 INFO L124 PetriNetUnfolderBase]: 1872/3071 cut-off events. [2024-06-21 22:01:41,292 INFO L125 PetriNetUnfolderBase]: For 46155/46155 co-relation queries the response was YES. [2024-06-21 22:01:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 3071 events. 1872/3071 cut-off events. For 46155/46155 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17423 event pairs, 636 based on Foata normal form. 2/3071 useless extension candidates. Maximal degree in co-relation 14721. Up to 2889 conditions per place. [2024-06-21 22:01:41,311 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 17 changer transitions 0/149 dead transitions. [2024-06-21 22:01:41,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 149 transitions, 1663 flow [2024-06-21 22:01:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:01:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:01:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 22:01:41,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:01:41,312 INFO L175 Difference]: Start difference. First operand has 116 places, 126 transitions, 1217 flow. Second operand 6 states and 104 transitions. [2024-06-21 22:01:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 149 transitions, 1663 flow [2024-06-21 22:01:41,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 149 transitions, 1560 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:41,344 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 1216 flow [2024-06-21 22:01:41,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1216, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2024-06-21 22:01:41,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 22:01:41,345 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 1216 flow [2024-06-21 22:01:41,345 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) [2024-06-21 22:01:41,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:41,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:41,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:01:41,345 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:41,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1452675097, now seen corresponding path program 2 times [2024-06-21 22:01:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859300487] [2024-06-21 22:01:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:43,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859300487] [2024-06-21 22:01:43,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859300487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:43,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:43,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:43,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20415477] [2024-06-21 22:01:43,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:43,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:43,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:43,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:43,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 1216 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) [2024-06-21 22:01:43,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:43,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:43,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:44,288 INFO L124 PetriNetUnfolderBase]: 1866/3063 cut-off events. [2024-06-21 22:01:44,288 INFO L125 PetriNetUnfolderBase]: For 48793/48793 co-relation queries the response was YES. [2024-06-21 22:01:44,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14953 conditions, 3063 events. 1866/3063 cut-off events. For 48793/48793 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17383 event pairs, 672 based on Foata normal form. 2/3063 useless extension candidates. Maximal degree in co-relation 14899. Up to 2914 conditions per place. [2024-06-21 22:01:44,303 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 126 selfloop transitions, 12 changer transitions 0/143 dead transitions. [2024-06-21 22:01:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 143 transitions, 1524 flow [2024-06-21 22:01:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:01:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:01:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 22:01:44,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:01:44,305 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 1216 flow. Second operand 6 states and 96 transitions. [2024-06-21 22:01:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 143 transitions, 1524 flow [2024-06-21 22:01:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 143 transitions, 1479 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 22:01:44,342 INFO L231 Difference]: Finished difference. Result has 121 places, 132 transitions, 1201 flow [2024-06-21 22:01:44,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1201, PETRI_PLACES=121, PETRI_TRANSITIONS=132} [2024-06-21 22:01:44,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 22:01:44,343 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 132 transitions, 1201 flow [2024-06-21 22:01:44,343 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) [2024-06-21 22:01:44,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:44,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:44,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:01:44,344 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)] === [2024-06-21 22:01:44,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash -262395450, now seen corresponding path program 1 times [2024-06-21 22:01:44,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:44,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16031374] [2024-06-21 22:01:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:44,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:46,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:46,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16031374] [2024-06-21 22:01:46,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16031374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:46,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:46,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:46,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643925528] [2024-06-21 22:01:46,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:46,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:46,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:46,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:46,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:46,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:46,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 1201 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) [2024-06-21 22:01:46,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:46,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:48,125 INFO L124 PetriNetUnfolderBase]: 1962/3217 cut-off events. [2024-06-21 22:01:48,126 INFO L125 PetriNetUnfolderBase]: For 56518/56518 co-relation queries the response was YES. [2024-06-21 22:01:48,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15798 conditions, 3217 events. 1962/3217 cut-off events. For 56518/56518 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18299 event pairs, 611 based on Foata normal form. 8/3223 useless extension candidates. Maximal degree in co-relation 15742. Up to 2713 conditions per place. [2024-06-21 22:01:48,143 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2024-06-21 22:01:48,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 181 transitions, 1961 flow [2024-06-21 22:01:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 22:01:48,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 22:01:48,144 INFO L175 Difference]: Start difference. First operand has 121 places, 132 transitions, 1201 flow. Second operand 7 states and 129 transitions. [2024-06-21 22:01:48,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 181 transitions, 1961 flow [2024-06-21 22:01:48,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1925 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:48,192 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1466 flow [2024-06-21 22:01:48,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1466, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-21 22:01:48,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 22:01:48,193 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1466 flow [2024-06-21 22:01:48,193 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) [2024-06-21 22:01:48,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:48,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:01:48,194 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:48,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1170573020, now seen corresponding path program 2 times [2024-06-21 22:01:48,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:48,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840264642] [2024-06-21 22:01:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:50,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840264642] [2024-06-21 22:01:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840264642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:50,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838486909] [2024-06-21 22:01:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:50,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:50,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1466 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) [2024-06-21 22:01:50,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:50,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:50,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:51,635 INFO L124 PetriNetUnfolderBase]: 2086/3364 cut-off events. [2024-06-21 22:01:51,635 INFO L125 PetriNetUnfolderBase]: For 66737/66737 co-relation queries the response was YES. [2024-06-21 22:01:51,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17632 conditions, 3364 events. 2086/3364 cut-off events. For 66737/66737 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18900 event pairs, 603 based on Foata normal form. 12/3370 useless extension candidates. Maximal degree in co-relation 17573. Up to 2864 conditions per place. [2024-06-21 22:01:51,657 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 62 changer transitions 0/180 dead transitions. [2024-06-21 22:01:51,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 180 transitions, 2050 flow [2024-06-21 22:01:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 22:01:51,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 22:01:51,659 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1466 flow. Second operand 7 states and 123 transitions. [2024-06-21 22:01:51,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 180 transitions, 2050 flow [2024-06-21 22:01:51,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 180 transitions, 1996 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-21 22:01:51,755 INFO L231 Difference]: Finished difference. Result has 132 places, 162 transitions, 1696 flow [2024-06-21 22:01:51,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1696, PETRI_PLACES=132, PETRI_TRANSITIONS=162} [2024-06-21 22:01:51,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 22:01:51,755 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 162 transitions, 1696 flow [2024-06-21 22:01:51,756 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) [2024-06-21 22:01:51,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:51,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:51,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:01:51,756 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)] === [2024-06-21 22:01:51,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1424583570, now seen corresponding path program 3 times [2024-06-21 22:01:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:51,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704754646] [2024-06-21 22:01:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704754646] [2024-06-21 22:01:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704754646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:54,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:54,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251434987] [2024-06-21 22:01:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:54,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:54,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:54,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 162 transitions, 1696 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) [2024-06-21 22:01:54,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:54,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:54,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:55,455 INFO L124 PetriNetUnfolderBase]: 2114/3416 cut-off events. [2024-06-21 22:01:55,455 INFO L125 PetriNetUnfolderBase]: For 71438/71438 co-relation queries the response was YES. [2024-06-21 22:01:55,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18537 conditions, 3416 events. 2114/3416 cut-off events. For 71438/71438 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19302 event pairs, 601 based on Foata normal form. 12/3422 useless extension candidates. Maximal degree in co-relation 18474. Up to 2892 conditions per place. [2024-06-21 22:01:55,482 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 78 changer transitions 0/193 dead transitions. [2024-06-21 22:01:55,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 193 transitions, 2296 flow [2024-06-21 22:01:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:01:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:01:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 22:01:55,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 22:01:55,483 INFO L175 Difference]: Start difference. First operand has 132 places, 162 transitions, 1696 flow. Second operand 10 states and 165 transitions. [2024-06-21 22:01:55,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 193 transitions, 2296 flow [2024-06-21 22:01:55,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 193 transitions, 2152 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 22:01:55,547 INFO L231 Difference]: Finished difference. Result has 139 places, 169 transitions, 1817 flow [2024-06-21 22:01:55,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1817, PETRI_PLACES=139, PETRI_TRANSITIONS=169} [2024-06-21 22:01:55,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 22:01:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 169 transitions, 1817 flow [2024-06-21 22:01:55,548 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) [2024-06-21 22:01:55,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:55,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:01:55,548 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)] === [2024-06-21 22:01:55,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -114570524, now seen corresponding path program 1 times [2024-06-21 22:01:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:55,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953646999] [2024-06-21 22:01:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:58,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:58,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953646999] [2024-06-21 22:01:58,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953646999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:58,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:58,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:58,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396668531] [2024-06-21 22:01:58,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:58,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:58,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 169 transitions, 1817 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) [2024-06-21 22:01:58,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:58,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:58,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:59,811 INFO L124 PetriNetUnfolderBase]: 2153/3469 cut-off events. [2024-06-21 22:01:59,811 INFO L125 PetriNetUnfolderBase]: For 75955/75955 co-relation queries the response was YES. [2024-06-21 22:01:59,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18912 conditions, 3469 events. 2153/3469 cut-off events. For 75955/75955 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19558 event pairs, 616 based on Foata normal form. 14/3477 useless extension candidates. Maximal degree in co-relation 18847. Up to 3107 conditions per place. [2024-06-21 22:01:59,832 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 132 selfloop transitions, 54 changer transitions 0/191 dead transitions. [2024-06-21 22:01:59,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 191 transitions, 2302 flow [2024-06-21 22:01:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:01:59,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:01:59,834 INFO L175 Difference]: Start difference. First operand has 139 places, 169 transitions, 1817 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:01:59,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 191 transitions, 2302 flow [2024-06-21 22:01:59,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 191 transitions, 2136 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:59,898 INFO L231 Difference]: Finished difference. Result has 139 places, 171 transitions, 1802 flow [2024-06-21 22:01:59,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1802, PETRI_PLACES=139, PETRI_TRANSITIONS=171} [2024-06-21 22:01:59,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 22:01:59,899 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 171 transitions, 1802 flow [2024-06-21 22:01:59,899 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) [2024-06-21 22:01:59,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:59,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:59,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:01:59,899 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)] === [2024-06-21 22:01:59,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 991358946, now seen corresponding path program 1 times [2024-06-21 22:01:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:59,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550472022] [2024-06-21 22:01:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:59,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550472022] [2024-06-21 22:02:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550472022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:02,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:02,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036394920] [2024-06-21 22:02:02,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:02,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:02,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:02,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:02,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 171 transitions, 1802 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) [2024-06-21 22:02:02,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:02,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:02,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:03,502 INFO L124 PetriNetUnfolderBase]: 2269/3675 cut-off events. [2024-06-21 22:02:03,503 INFO L125 PetriNetUnfolderBase]: For 79602/79604 co-relation queries the response was YES. [2024-06-21 22:02:03,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20032 conditions, 3675 events. 2269/3675 cut-off events. For 79602/79604 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21071 event pairs, 678 based on Foata normal form. 4/3677 useless extension candidates. Maximal degree in co-relation 19966. Up to 3027 conditions per place. [2024-06-21 22:02:03,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 66 changer transitions 0/226 dead transitions. [2024-06-21 22:02:03,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 226 transitions, 2778 flow [2024-06-21 22:02:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:02:03,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:02:03,531 INFO L175 Difference]: Start difference. First operand has 139 places, 171 transitions, 1802 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:02:03,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 226 transitions, 2778 flow [2024-06-21 22:02:03,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 226 transitions, 2643 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:03,600 INFO L231 Difference]: Finished difference. Result has 144 places, 193 transitions, 2100 flow [2024-06-21 22:02:03,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2100, PETRI_PLACES=144, PETRI_TRANSITIONS=193} [2024-06-21 22:02:03,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 22:02:03,601 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 193 transitions, 2100 flow [2024-06-21 22:02:03,601 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) [2024-06-21 22:02:03,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:03,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:02:03,601 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:03,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash 359029852, now seen corresponding path program 2 times [2024-06-21 22:02:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397492321] [2024-06-21 22:02:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:05,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397492321] [2024-06-21 22:02:05,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397492321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:05,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:05,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545693373] [2024-06-21 22:02:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:05,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:05,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 193 transitions, 2100 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) [2024-06-21 22:02:05,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:05,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:05,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:07,135 INFO L124 PetriNetUnfolderBase]: 2283/3663 cut-off events. [2024-06-21 22:02:07,136 INFO L125 PetriNetUnfolderBase]: For 85252/85252 co-relation queries the response was YES. [2024-06-21 22:02:07,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20560 conditions, 3663 events. 2283/3663 cut-off events. For 85252/85252 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20813 event pairs, 656 based on Foata normal form. 6/3668 useless extension candidates. Maximal degree in co-relation 20491. Up to 3323 conditions per place. [2024-06-21 22:02:07,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 64 changer transitions 0/222 dead transitions. [2024-06-21 22:02:07,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 222 transitions, 2696 flow [2024-06-21 22:02:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:02:07,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 22:02:07,169 INFO L175 Difference]: Start difference. First operand has 144 places, 193 transitions, 2100 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:02:07,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 222 transitions, 2696 flow [2024-06-21 22:02:07,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 222 transitions, 2613 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 22:02:07,251 INFO L231 Difference]: Finished difference. Result has 149 places, 199 transitions, 2256 flow [2024-06-21 22:02:07,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2256, PETRI_PLACES=149, PETRI_TRANSITIONS=199} [2024-06-21 22:02:07,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 22:02:07,252 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 199 transitions, 2256 flow [2024-06-21 22:02:07,252 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) [2024-06-21 22:02:07,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:07,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:02:07,252 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:07,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1085513816, now seen corresponding path program 3 times [2024-06-21 22:02:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613797198] [2024-06-21 22:02:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:09,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:09,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613797198] [2024-06-21 22:02:09,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613797198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:09,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:09,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634241964] [2024-06-21 22:02:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:09,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:09,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:09,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 199 transitions, 2256 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) [2024-06-21 22:02:09,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:09,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:10,778 INFO L124 PetriNetUnfolderBase]: 2293/3704 cut-off events. [2024-06-21 22:02:10,778 INFO L125 PetriNetUnfolderBase]: For 88770/88770 co-relation queries the response was YES. [2024-06-21 22:02:10,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20718 conditions, 3704 events. 2293/3704 cut-off events. For 88770/88770 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21184 event pairs, 644 based on Foata normal form. 2/3704 useless extension candidates. Maximal degree in co-relation 20647. Up to 3050 conditions per place. [2024-06-21 22:02:10,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 66 changer transitions 0/231 dead transitions. [2024-06-21 22:02:10,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 231 transitions, 2983 flow [2024-06-21 22:02:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 22:02:10,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 22:02:10,805 INFO L175 Difference]: Start difference. First operand has 149 places, 199 transitions, 2256 flow. Second operand 7 states and 131 transitions. [2024-06-21 22:02:10,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 231 transitions, 2983 flow [2024-06-21 22:02:10,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2820 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:10,886 INFO L231 Difference]: Finished difference. Result has 151 places, 202 transitions, 2275 flow [2024-06-21 22:02:10,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=151, PETRI_TRANSITIONS=202} [2024-06-21 22:02:10,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 22:02:10,887 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 202 transitions, 2275 flow [2024-06-21 22:02:10,887 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) [2024-06-21 22:02:10,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:10,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:10,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:02:10,887 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:10,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1096941656, now seen corresponding path program 4 times [2024-06-21 22:02:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983427600] [2024-06-21 22:02:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:13,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:13,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983427600] [2024-06-21 22:02:13,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983427600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:13,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:13,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:13,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220003850] [2024-06-21 22:02:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:13,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:13,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:13,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:13,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 202 transitions, 2275 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) [2024-06-21 22:02:13,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:13,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:13,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:14,629 INFO L124 PetriNetUnfolderBase]: 2275/3673 cut-off events. [2024-06-21 22:02:14,629 INFO L125 PetriNetUnfolderBase]: For 92165/92165 co-relation queries the response was YES. [2024-06-21 22:02:14,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20666 conditions, 3673 events. 2275/3673 cut-off events. For 92165/92165 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21024 event pairs, 648 based on Foata normal form. 6/3676 useless extension candidates. Maximal degree in co-relation 20594. Up to 3039 conditions per place. [2024-06-21 22:02:14,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 63 changer transitions 0/228 dead transitions. [2024-06-21 22:02:14,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 228 transitions, 2942 flow [2024-06-21 22:02:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 22:02:14,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 22:02:14,657 INFO L175 Difference]: Start difference. First operand has 151 places, 202 transitions, 2275 flow. Second operand 7 states and 129 transitions. [2024-06-21 22:02:14,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 228 transitions, 2942 flow [2024-06-21 22:02:14,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 228 transitions, 2865 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:14,737 INFO L231 Difference]: Finished difference. Result has 155 places, 202 transitions, 2332 flow [2024-06-21 22:02:14,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=155, PETRI_TRANSITIONS=202} [2024-06-21 22:02:14,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 22:02:14,737 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 202 transitions, 2332 flow [2024-06-21 22:02:14,738 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) [2024-06-21 22:02:14,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:14,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:14,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:02:14,738 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:14,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1928037156, now seen corresponding path program 5 times [2024-06-21 22:02:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598986874] [2024-06-21 22:02:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:14,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:17,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598986874] [2024-06-21 22:02:17,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598986874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:17,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:17,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:17,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132003634] [2024-06-21 22:02:17,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:17,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:17,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:17,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 202 transitions, 2332 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) [2024-06-21 22:02:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:18,409 INFO L124 PetriNetUnfolderBase]: 2257/3617 cut-off events. [2024-06-21 22:02:18,409 INFO L125 PetriNetUnfolderBase]: For 93879/93879 co-relation queries the response was YES. [2024-06-21 22:02:18,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20490 conditions, 3617 events. 2257/3617 cut-off events. For 93879/93879 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20487 event pairs, 620 based on Foata normal form. 6/3617 useless extension candidates. Maximal degree in co-relation 20417. Up to 3057 conditions per place. [2024-06-21 22:02:18,431 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 133 selfloop transitions, 81 changer transitions 0/219 dead transitions. [2024-06-21 22:02:18,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 219 transitions, 2874 flow [2024-06-21 22:02:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:02:18,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:02:18,432 INFO L175 Difference]: Start difference. First operand has 155 places, 202 transitions, 2332 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:02:18,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 219 transitions, 2874 flow [2024-06-21 22:02:18,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 219 transitions, 2747 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:18,510 INFO L231 Difference]: Finished difference. Result has 159 places, 202 transitions, 2376 flow [2024-06-21 22:02:18,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2376, PETRI_PLACES=159, PETRI_TRANSITIONS=202} [2024-06-21 22:02:18,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 22:02:18,511 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 202 transitions, 2376 flow [2024-06-21 22:02:18,511 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) [2024-06-21 22:02:18,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:18,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:02:18,511 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1072855636, now seen corresponding path program 6 times [2024-06-21 22:02:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443747770] [2024-06-21 22:02:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:20,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:20,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443747770] [2024-06-21 22:02:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443747770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:20,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643903281] [2024-06-21 22:02:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:20,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:21,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:21,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 202 transitions, 2376 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) [2024-06-21 22:02:21,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:21,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:21,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:22,278 INFO L124 PetriNetUnfolderBase]: 2205/3549 cut-off events. [2024-06-21 22:02:22,279 INFO L125 PetriNetUnfolderBase]: For 93813/93813 co-relation queries the response was YES. [2024-06-21 22:02:22,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19760 conditions, 3549 events. 2205/3549 cut-off events. For 93813/93813 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20194 event pairs, 606 based on Foata normal form. 12/3555 useless extension candidates. Maximal degree in co-relation 19686. Up to 3019 conditions per place. [2024-06-21 22:02:22,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 84 changer transitions 0/224 dead transitions. [2024-06-21 22:02:22,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 224 transitions, 2875 flow [2024-06-21 22:02:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:02:22,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:02:22,304 INFO L175 Difference]: Start difference. First operand has 159 places, 202 transitions, 2376 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:02:22,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 224 transitions, 2875 flow [2024-06-21 22:02:22,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 224 transitions, 2721 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:22,385 INFO L231 Difference]: Finished difference. Result has 162 places, 202 transitions, 2402 flow [2024-06-21 22:02:22,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2402, PETRI_PLACES=162, PETRI_TRANSITIONS=202} [2024-06-21 22:02:22,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 22:02:22,385 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 202 transitions, 2402 flow [2024-06-21 22:02:22,385 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) [2024-06-21 22:02:22,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:22,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:22,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:02:22,386 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:22,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1200794106, now seen corresponding path program 7 times [2024-06-21 22:02:22,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:22,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851470635] [2024-06-21 22:02:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:22,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:24,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:24,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851470635] [2024-06-21 22:02:24,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851470635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:24,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:24,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825636638] [2024-06-21 22:02:24,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:24,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:24,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:24,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:24,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 202 transitions, 2402 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) [2024-06-21 22:02:24,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:24,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:24,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:25,767 INFO L124 PetriNetUnfolderBase]: 2285/3710 cut-off events. [2024-06-21 22:02:25,767 INFO L125 PetriNetUnfolderBase]: For 90751/90753 co-relation queries the response was YES. [2024-06-21 22:02:25,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20474 conditions, 3710 events. 2285/3710 cut-off events. For 90751/90753 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21464 event pairs, 655 based on Foata normal form. 4/3713 useless extension candidates. Maximal degree in co-relation 20399. Up to 3022 conditions per place. [2024-06-21 22:02:25,796 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 161 selfloop transitions, 98 changer transitions 0/264 dead transitions. [2024-06-21 22:02:25,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 264 transitions, 3317 flow [2024-06-21 22:02:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 22:02:25,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 22:02:25,798 INFO L175 Difference]: Start difference. First operand has 162 places, 202 transitions, 2402 flow. Second operand 8 states and 154 transitions. [2024-06-21 22:02:25,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 264 transitions, 3317 flow [2024-06-21 22:02:25,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 264 transitions, 3046 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 22:02:25,884 INFO L231 Difference]: Finished difference. Result has 164 places, 227 transitions, 2697 flow [2024-06-21 22:02:25,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2697, PETRI_PLACES=164, PETRI_TRANSITIONS=227} [2024-06-21 22:02:25,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 22:02:25,884 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 227 transitions, 2697 flow [2024-06-21 22:02:25,885 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) [2024-06-21 22:02:25,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:25,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:25,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:02:25,885 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:25,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2094334978, now seen corresponding path program 1 times [2024-06-21 22:02:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762998078] [2024-06-21 22:02:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762998078] [2024-06-21 22:02:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762998078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:28,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032496543] [2024-06-21 22:02:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:28,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:28,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:28,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:28,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:28,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 227 transitions, 2697 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) [2024-06-21 22:02:28,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:28,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:28,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:29,965 INFO L124 PetriNetUnfolderBase]: 2293/3696 cut-off events. [2024-06-21 22:02:29,965 INFO L125 PetriNetUnfolderBase]: For 95270/95270 co-relation queries the response was YES. [2024-06-21 22:02:29,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21033 conditions, 3696 events. 2293/3696 cut-off events. For 95270/95270 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21215 event pairs, 665 based on Foata normal form. 2/3697 useless extension candidates. Maximal degree in co-relation 20954. Up to 3454 conditions per place. [2024-06-21 22:02:29,997 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 227 selfloop transitions, 22 changer transitions 0/254 dead transitions. [2024-06-21 22:02:29,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 254 transitions, 3417 flow [2024-06-21 22:02:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:02:29,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:02:29,999 INFO L175 Difference]: Start difference. First operand has 164 places, 227 transitions, 2697 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:02:29,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 254 transitions, 3417 flow [2024-06-21 22:02:30,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 254 transitions, 3289 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:30,115 INFO L231 Difference]: Finished difference. Result has 167 places, 231 transitions, 2690 flow [2024-06-21 22:02:30,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2690, PETRI_PLACES=167, PETRI_TRANSITIONS=231} [2024-06-21 22:02:30,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 22:02:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 231 transitions, 2690 flow [2024-06-21 22:02:30,116 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) [2024-06-21 22:02:30,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:30,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:30,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:02:30,116 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:30,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash 455557346, now seen corresponding path program 2 times [2024-06-21 22:02:30,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:30,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452706074] [2024-06-21 22:02:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:30,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:33,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452706074] [2024-06-21 22:02:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452706074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:33,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482780118] [2024-06-21 22:02:33,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:33,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:33,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:33,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 231 transitions, 2690 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) [2024-06-21 22:02:33,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:34,296 INFO L124 PetriNetUnfolderBase]: 2301/3702 cut-off events. [2024-06-21 22:02:34,296 INFO L125 PetriNetUnfolderBase]: For 100200/100200 co-relation queries the response was YES. [2024-06-21 22:02:34,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20992 conditions, 3702 events. 2301/3702 cut-off events. For 100200/100200 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21272 event pairs, 701 based on Foata normal form. 2/3703 useless extension candidates. Maximal degree in co-relation 20911. Up to 3501 conditions per place. [2024-06-21 22:02:34,324 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 227 selfloop transitions, 19 changer transitions 0/251 dead transitions. [2024-06-21 22:02:34,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 251 transitions, 3278 flow [2024-06-21 22:02:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 22:02:34,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 22:02:34,326 INFO L175 Difference]: Start difference. First operand has 167 places, 231 transitions, 2690 flow. Second operand 7 states and 115 transitions. [2024-06-21 22:02:34,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 251 transitions, 3278 flow [2024-06-21 22:02:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 251 transitions, 3209 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:34,436 INFO L231 Difference]: Finished difference. Result has 171 places, 233 transitions, 2706 flow [2024-06-21 22:02:34,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2706, PETRI_PLACES=171, PETRI_TRANSITIONS=233} [2024-06-21 22:02:34,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 22:02:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 233 transitions, 2706 flow [2024-06-21 22:02:34,437 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) [2024-06-21 22:02:34,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:34,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:02:34,437 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1928028228, now seen corresponding path program 3 times [2024-06-21 22:02:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000295020] [2024-06-21 22:02:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:37,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000295020] [2024-06-21 22:02:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000295020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:37,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:37,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775791819] [2024-06-21 22:02:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:37,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:37,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:37,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 233 transitions, 2706 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) [2024-06-21 22:02:37,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:37,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:37,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:38,631 INFO L124 PetriNetUnfolderBase]: 2296/3687 cut-off events. [2024-06-21 22:02:38,631 INFO L125 PetriNetUnfolderBase]: For 102455/102455 co-relation queries the response was YES. [2024-06-21 22:02:38,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20940 conditions, 3687 events. 2296/3687 cut-off events. For 102455/102455 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21131 event pairs, 755 based on Foata normal form. 2/3688 useless extension candidates. Maximal degree in co-relation 20857. Up to 3524 conditions per place. [2024-06-21 22:02:38,660 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 227 selfloop transitions, 14 changer transitions 0/246 dead transitions. [2024-06-21 22:02:38,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 246 transitions, 3226 flow [2024-06-21 22:02:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 22:02:38,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-21 22:02:38,661 INFO L175 Difference]: Start difference. First operand has 171 places, 233 transitions, 2706 flow. Second operand 7 states and 108 transitions. [2024-06-21 22:02:38,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 246 transitions, 3226 flow [2024-06-21 22:02:38,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 246 transitions, 3153 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:38,790 INFO L231 Difference]: Finished difference. Result has 173 places, 233 transitions, 2666 flow [2024-06-21 22:02:38,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=173, PETRI_TRANSITIONS=233} [2024-06-21 22:02:38,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 22:02:38,791 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 233 transitions, 2666 flow [2024-06-21 22:02:38,791 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) [2024-06-21 22:02:38,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:38,791 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] [2024-06-21 22:02:38,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:02:38,791 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:38,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1500928241, now seen corresponding path program 1 times [2024-06-21 22:02:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321919454] [2024-06-21 22:02:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:42,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:42,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321919454] [2024-06-21 22:02:42,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321919454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:42,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:42,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311583166] [2024-06-21 22:02:42,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:42,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 233 transitions, 2666 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) [2024-06-21 22:02:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:43,345 INFO L124 PetriNetUnfolderBase]: 2348/3759 cut-off events. [2024-06-21 22:02:43,345 INFO L125 PetriNetUnfolderBase]: For 116423/116423 co-relation queries the response was YES. [2024-06-21 22:02:43,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21341 conditions, 3759 events. 2348/3759 cut-off events. For 116423/116423 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21445 event pairs, 638 based on Foata normal form. 14/3768 useless extension candidates. Maximal degree in co-relation 21257. Up to 3394 conditions per place. [2024-06-21 22:02:43,378 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 52 changer transitions 0/255 dead transitions. [2024-06-21 22:02:43,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 3281 flow [2024-06-21 22:02:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:02:43,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:02:43,379 INFO L175 Difference]: Start difference. First operand has 173 places, 233 transitions, 2666 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:02:43,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 3281 flow [2024-06-21 22:02:43,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 255 transitions, 3241 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:43,510 INFO L231 Difference]: Finished difference. Result has 174 places, 235 transitions, 2769 flow [2024-06-21 22:02:43,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2769, PETRI_PLACES=174, PETRI_TRANSITIONS=235} [2024-06-21 22:02:43,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 22:02:43,511 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 235 transitions, 2769 flow [2024-06-21 22:02:43,511 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) [2024-06-21 22:02:43,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:43,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:43,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:02:43,511 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:43,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1566924771, now seen corresponding path program 2 times [2024-06-21 22:02:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:43,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836962109] [2024-06-21 22:02:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836962109] [2024-06-21 22:02:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836962109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:46,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544179885] [2024-06-21 22:02:46,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:46,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:46,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:46,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:46,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 235 transitions, 2769 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) [2024-06-21 22:02:46,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:46,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:46,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:48,011 INFO L124 PetriNetUnfolderBase]: 2409/3866 cut-off events. [2024-06-21 22:02:48,012 INFO L125 PetriNetUnfolderBase]: For 122500/122500 co-relation queries the response was YES. [2024-06-21 22:02:48,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22440 conditions, 3866 events. 2409/3866 cut-off events. For 122500/122500 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22140 event pairs, 651 based on Foata normal form. 8/3869 useless extension candidates. Maximal degree in co-relation 22355. Up to 3330 conditions per place. [2024-06-21 22:02:48,048 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 205 selfloop transitions, 51 changer transitions 0/261 dead transitions. [2024-06-21 22:02:48,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 3517 flow [2024-06-21 22:02:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 22:02:48,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 22:02:48,049 INFO L175 Difference]: Start difference. First operand has 174 places, 235 transitions, 2769 flow. Second operand 7 states and 122 transitions. [2024-06-21 22:02:48,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 3517 flow [2024-06-21 22:02:48,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 261 transitions, 3398 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:48,199 INFO L231 Difference]: Finished difference. Result has 176 places, 237 transitions, 2790 flow [2024-06-21 22:02:48,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2790, PETRI_PLACES=176, PETRI_TRANSITIONS=237} [2024-06-21 22:02:48,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 22:02:48,200 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 237 transitions, 2790 flow [2024-06-21 22:02:48,200 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) [2024-06-21 22:02:48,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:48,200 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] [2024-06-21 22:02:48,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:02:48,200 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)] === [2024-06-21 22:02:48,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1152386951, now seen corresponding path program 1 times [2024-06-21 22:02:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200934791] [2024-06-21 22:02:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:48,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:51,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:51,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200934791] [2024-06-21 22:02:51,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200934791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:51,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:51,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451547487] [2024-06-21 22:02:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:51,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:51,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:51,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 237 transitions, 2790 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) [2024-06-21 22:02:51,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:51,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:51,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:52,824 INFO L124 PetriNetUnfolderBase]: 2626/4239 cut-off events. [2024-06-21 22:02:52,824 INFO L125 PetriNetUnfolderBase]: For 160089/160089 co-relation queries the response was YES. [2024-06-21 22:02:52,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25361 conditions, 4239 events. 2626/4239 cut-off events. For 160089/160089 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24793 event pairs, 670 based on Foata normal form. 16/4253 useless extension candidates. Maximal degree in co-relation 25275. Up to 2951 conditions per place. [2024-06-21 22:02:52,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 86 changer transitions 0/283 dead transitions. [2024-06-21 22:02:52,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 283 transitions, 3776 flow [2024-06-21 22:02:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 22:02:52,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:02:52,864 INFO L175 Difference]: Start difference. First operand has 176 places, 237 transitions, 2790 flow. Second operand 8 states and 152 transitions. [2024-06-21 22:02:52,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 283 transitions, 3776 flow [2024-06-21 22:02:53,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 283 transitions, 3710 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:53,072 INFO L231 Difference]: Finished difference. Result has 182 places, 242 transitions, 2992 flow [2024-06-21 22:02:53,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2992, PETRI_PLACES=182, PETRI_TRANSITIONS=242} [2024-06-21 22:02:53,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 22:02:53,073 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 242 transitions, 2992 flow [2024-06-21 22:02:53,073 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) [2024-06-21 22:02:53,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:53,073 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] [2024-06-21 22:02:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:02:53,074 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)] === [2024-06-21 22:02:53,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash -440956401, now seen corresponding path program 2 times [2024-06-21 22:02:53,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:53,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216308822] [2024-06-21 22:02:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:53,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:56,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:56,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216308822] [2024-06-21 22:02:56,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216308822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:56,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:56,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:02:56,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149768842] [2024-06-21 22:02:56,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:56,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:02:56,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:56,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:02:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:02:57,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:57,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 242 transitions, 2992 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:57,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:57,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:57,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:58,639 INFO L124 PetriNetUnfolderBase]: 2714/4367 cut-off events. [2024-06-21 22:02:58,640 INFO L125 PetriNetUnfolderBase]: For 179469/179469 co-relation queries the response was YES. [2024-06-21 22:02:58,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26958 conditions, 4367 events. 2714/4367 cut-off events. For 179469/179469 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25565 event pairs, 765 based on Foata normal form. 24/4389 useless extension candidates. Maximal degree in co-relation 26869. Up to 3581 conditions per place. [2024-06-21 22:02:58,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 89 changer transitions 0/273 dead transitions. [2024-06-21 22:02:58,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 273 transitions, 3668 flow [2024-06-21 22:02:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:02:58,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:02:58,678 INFO L175 Difference]: Start difference. First operand has 182 places, 242 transitions, 2992 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:02:58,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 273 transitions, 3668 flow [2024-06-21 22:02:58,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 273 transitions, 3544 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:58,854 INFO L231 Difference]: Finished difference. Result has 187 places, 244 transitions, 3096 flow [2024-06-21 22:02:58,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3096, PETRI_PLACES=187, PETRI_TRANSITIONS=244} [2024-06-21 22:02:58,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 22:02:58,854 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 244 transitions, 3096 flow [2024-06-21 22:02:58,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:58,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:58,854 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] [2024-06-21 22:02:58,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:02:58,855 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)] === [2024-06-21 22:02:58,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1154260901, now seen corresponding path program 3 times [2024-06-21 22:02:58,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:58,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145820594] [2024-06-21 22:02:58,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:58,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145820594] [2024-06-21 22:03:02,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145820594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:02,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:02,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080597243] [2024-06-21 22:03:02,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:02,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:02,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:02,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:02,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 244 transitions, 3096 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) [2024-06-21 22:03:02,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:02,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:02,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:03,577 INFO L124 PetriNetUnfolderBase]: 2865/4596 cut-off events. [2024-06-21 22:03:03,577 INFO L125 PetriNetUnfolderBase]: For 196008/196008 co-relation queries the response was YES. [2024-06-21 22:03:03,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29268 conditions, 4596 events. 2865/4596 cut-off events. For 196008/196008 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27129 event pairs, 770 based on Foata normal form. 16/4610 useless extension candidates. Maximal degree in co-relation 29177. Up to 3587 conditions per place. [2024-06-21 22:03:03,620 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 84 changer transitions 0/280 dead transitions. [2024-06-21 22:03:03,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 280 transitions, 3926 flow [2024-06-21 22:03:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:03:03,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:03:03,622 INFO L175 Difference]: Start difference. First operand has 187 places, 244 transitions, 3096 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:03:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 280 transitions, 3926 flow [2024-06-21 22:03:03,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 280 transitions, 3726 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:03,881 INFO L231 Difference]: Finished difference. Result has 190 places, 248 transitions, 3170 flow [2024-06-21 22:03:03,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3170, PETRI_PLACES=190, PETRI_TRANSITIONS=248} [2024-06-21 22:03:03,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 22:03:03,881 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 248 transitions, 3170 flow [2024-06-21 22:03:03,881 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) [2024-06-21 22:03:03,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:03,882 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] [2024-06-21 22:03:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:03:03,882 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)] === [2024-06-21 22:03:03,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash 360672749, now seen corresponding path program 4 times [2024-06-21 22:03:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:03,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438097277] [2024-06-21 22:03:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:03,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438097277] [2024-06-21 22:03:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438097277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:07,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537236997] [2024-06-21 22:03:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:07,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:07,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:07,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:07,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 248 transitions, 3170 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) [2024-06-21 22:03:07,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:07,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:07,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:09,213 INFO L124 PetriNetUnfolderBase]: 3093/4938 cut-off events. [2024-06-21 22:03:09,214 INFO L125 PetriNetUnfolderBase]: For 262686/262686 co-relation queries the response was YES. [2024-06-21 22:03:09,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31054 conditions, 4938 events. 3093/4938 cut-off events. For 262686/262686 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 29175 event pairs, 839 based on Foata normal form. 68/5001 useless extension candidates. Maximal degree in co-relation 30961. Up to 4037 conditions per place. [2024-06-21 22:03:09,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 82 changer transitions 7/275 dead transitions. [2024-06-21 22:03:09,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 275 transitions, 3850 flow [2024-06-21 22:03:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:03:09,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 22:03:09,257 INFO L175 Difference]: Start difference. First operand has 190 places, 248 transitions, 3170 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:03:09,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 275 transitions, 3850 flow [2024-06-21 22:03:09,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 275 transitions, 3712 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:09,465 INFO L231 Difference]: Finished difference. Result has 194 places, 245 transitions, 3215 flow [2024-06-21 22:03:09,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3215, PETRI_PLACES=194, PETRI_TRANSITIONS=245} [2024-06-21 22:03:09,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 22:03:09,465 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 245 transitions, 3215 flow [2024-06-21 22:03:09,466 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) [2024-06-21 22:03:09,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:09,466 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] [2024-06-21 22:03:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:03:09,466 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)] === [2024-06-21 22:03:09,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1514953075, now seen corresponding path program 1 times [2024-06-21 22:03:09,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:09,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943448581] [2024-06-21 22:03:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:09,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:13,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:13,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943448581] [2024-06-21 22:03:13,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943448581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:13,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:13,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173848506] [2024-06-21 22:03:13,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:13,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:13,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:13,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 245 transitions, 3215 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) [2024-06-21 22:03:13,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:13,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:13,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:14,900 INFO L124 PetriNetUnfolderBase]: 3127/5000 cut-off events. [2024-06-21 22:03:14,900 INFO L125 PetriNetUnfolderBase]: For 269057/269057 co-relation queries the response was YES. [2024-06-21 22:03:14,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31622 conditions, 5000 events. 3127/5000 cut-off events. For 269057/269057 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29710 event pairs, 859 based on Foata normal form. 68/5063 useless extension candidates. Maximal degree in co-relation 31527. Up to 4119 conditions per place. [2024-06-21 22:03:14,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 89 changer transitions 6/277 dead transitions. [2024-06-21 22:03:14,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 277 transitions, 3913 flow [2024-06-21 22:03:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 22:03:14,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 22:03:14,946 INFO L175 Difference]: Start difference. First operand has 194 places, 245 transitions, 3215 flow. Second operand 10 states and 171 transitions. [2024-06-21 22:03:14,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 277 transitions, 3913 flow [2024-06-21 22:03:15,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 3719 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:15,259 INFO L231 Difference]: Finished difference. Result has 198 places, 243 transitions, 3226 flow [2024-06-21 22:03:15,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3226, PETRI_PLACES=198, PETRI_TRANSITIONS=243} [2024-06-21 22:03:15,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 22:03:15,260 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 243 transitions, 3226 flow [2024-06-21 22:03:15,260 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) [2024-06-21 22:03:15,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:15,260 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] [2024-06-21 22:03:15,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:03:15,260 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)] === [2024-06-21 22:03:15,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1308145813, now seen corresponding path program 5 times [2024-06-21 22:03:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176109727] [2024-06-21 22:03:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:15,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:18,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:18,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176109727] [2024-06-21 22:03:18,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176109727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:18,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:18,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006375326] [2024-06-21 22:03:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:18,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:18,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:18,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:18,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 243 transitions, 3226 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) [2024-06-21 22:03:18,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:18,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:20,245 INFO L124 PetriNetUnfolderBase]: 3440/5515 cut-off events. [2024-06-21 22:03:20,245 INFO L125 PetriNetUnfolderBase]: For 320079/320079 co-relation queries the response was YES. [2024-06-21 22:03:20,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 5515 events. 3440/5515 cut-off events. For 320079/320079 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32969 event pairs, 904 based on Foata normal form. 56/5566 useless extension candidates. Maximal degree in co-relation 35587. Up to 3768 conditions per place. [2024-06-21 22:03:20,290 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 76 changer transitions 0/278 dead transitions. [2024-06-21 22:03:20,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 278 transitions, 4080 flow [2024-06-21 22:03:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:03:20,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:03:20,291 INFO L175 Difference]: Start difference. First operand has 198 places, 243 transitions, 3226 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:03:20,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 278 transitions, 4080 flow [2024-06-21 22:03:20,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 278 transitions, 3764 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 22:03:20,660 INFO L231 Difference]: Finished difference. Result has 197 places, 246 transitions, 3171 flow [2024-06-21 22:03:20,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3171, PETRI_PLACES=197, PETRI_TRANSITIONS=246} [2024-06-21 22:03:20,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 22:03:20,661 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 246 transitions, 3171 flow [2024-06-21 22:03:20,661 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) [2024-06-21 22:03:20,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:20,661 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] [2024-06-21 22:03:20,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:03:20,661 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)] === [2024-06-21 22:03:20,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1069483885, now seen corresponding path program 2 times [2024-06-21 22:03:20,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:20,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602594029] [2024-06-21 22:03:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602594029] [2024-06-21 22:03:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602594029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:23,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:23,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:23,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642906083] [2024-06-21 22:03:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:23,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:23,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:23,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:23,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 246 transitions, 3171 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) [2024-06-21 22:03:23,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:23,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:23,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:25,646 INFO L124 PetriNetUnfolderBase]: 3594/5793 cut-off events. [2024-06-21 22:03:25,646 INFO L125 PetriNetUnfolderBase]: For 318200/318200 co-relation queries the response was YES. [2024-06-21 22:03:25,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 5793 events. 3594/5793 cut-off events. For 318200/318200 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35126 event pairs, 1054 based on Foata normal form. 56/5844 useless extension candidates. Maximal degree in co-relation 35983. Up to 4702 conditions per place. [2024-06-21 22:03:25,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 90 changer transitions 13/285 dead transitions. [2024-06-21 22:03:25,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 285 transitions, 3913 flow [2024-06-21 22:03:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 22:03:25,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:03:25,699 INFO L175 Difference]: Start difference. First operand has 197 places, 246 transitions, 3171 flow. Second operand 10 states and 175 transitions. [2024-06-21 22:03:25,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 285 transitions, 3913 flow [2024-06-21 22:03:26,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 285 transitions, 3680 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:26,017 INFO L231 Difference]: Finished difference. Result has 202 places, 242 transitions, 3091 flow [2024-06-21 22:03:26,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3091, PETRI_PLACES=202, PETRI_TRANSITIONS=242} [2024-06-21 22:03:26,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 22:03:26,017 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 242 transitions, 3091 flow [2024-06-21 22:03:26,018 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) [2024-06-21 22:03:26,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:26,018 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] [2024-06-21 22:03:26,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:03:26,018 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)] === [2024-06-21 22:03:26,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -689148631, now seen corresponding path program 1 times [2024-06-21 22:03:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908059568] [2024-06-21 22:03:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:29,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:29,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908059568] [2024-06-21 22:03:29,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908059568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:29,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:29,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066566840] [2024-06-21 22:03:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:29,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:29,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 242 transitions, 3091 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) [2024-06-21 22:03:29,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:29,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:29,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:30,949 INFO L124 PetriNetUnfolderBase]: 3426/5543 cut-off events. [2024-06-21 22:03:30,949 INFO L125 PetriNetUnfolderBase]: For 258993/258993 co-relation queries the response was YES. [2024-06-21 22:03:30,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34690 conditions, 5543 events. 3426/5543 cut-off events. For 258993/258993 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33616 event pairs, 1156 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 34591. Up to 5092 conditions per place. [2024-06-21 22:03:30,993 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 63 changer transitions 0/281 dead transitions. [2024-06-21 22:03:30,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 3811 flow [2024-06-21 22:03:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 22:03:30,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 22:03:30,994 INFO L175 Difference]: Start difference. First operand has 202 places, 242 transitions, 3091 flow. Second operand 8 states and 151 transitions. [2024-06-21 22:03:30,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 3811 flow [2024-06-21 22:03:31,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 281 transitions, 3547 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 22:03:31,311 INFO L231 Difference]: Finished difference. Result has 201 places, 245 transitions, 3016 flow [2024-06-21 22:03:31,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3016, PETRI_PLACES=201, PETRI_TRANSITIONS=245} [2024-06-21 22:03:31,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 22:03:31,312 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 245 transitions, 3016 flow [2024-06-21 22:03:31,312 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) [2024-06-21 22:03:31,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:31,313 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] [2024-06-21 22:03:31,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:03:31,313 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)] === [2024-06-21 22:03:31,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash -741944889, now seen corresponding path program 2 times [2024-06-21 22:03:31,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473000242] [2024-06-21 22:03:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:31,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473000242] [2024-06-21 22:03:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473000242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:34,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:34,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398160680] [2024-06-21 22:03:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:34,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:34,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 245 transitions, 3016 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) [2024-06-21 22:03:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:34,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:36,362 INFO L124 PetriNetUnfolderBase]: 3516/5677 cut-off events. [2024-06-21 22:03:36,362 INFO L125 PetriNetUnfolderBase]: For 278348/278350 co-relation queries the response was YES. [2024-06-21 22:03:36,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36190 conditions, 5677 events. 3516/5677 cut-off events. For 278348/278350 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34459 event pairs, 877 based on Foata normal form. 4/5680 useless extension candidates. Maximal degree in co-relation 36092. Up to 4492 conditions per place. [2024-06-21 22:03:36,413 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 130 changer transitions 0/299 dead transitions. [2024-06-21 22:03:36,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 299 transitions, 4263 flow [2024-06-21 22:03:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 22:03:36,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 22:03:36,414 INFO L175 Difference]: Start difference. First operand has 201 places, 245 transitions, 3016 flow. Second operand 8 states and 161 transitions. [2024-06-21 22:03:36,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 299 transitions, 4263 flow [2024-06-21 22:03:36,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 299 transitions, 4112 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:36,725 INFO L231 Difference]: Finished difference. Result has 204 places, 259 transitions, 3363 flow [2024-06-21 22:03:36,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3363, PETRI_PLACES=204, PETRI_TRANSITIONS=259} [2024-06-21 22:03:36,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 22:03:36,725 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 259 transitions, 3363 flow [2024-06-21 22:03:36,726 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) [2024-06-21 22:03:36,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:36,726 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] [2024-06-21 22:03:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:03:36,726 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)] === [2024-06-21 22:03:36,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash -15509575, now seen corresponding path program 3 times [2024-06-21 22:03:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:36,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081601950] [2024-06-21 22:03:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:39,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081601950] [2024-06-21 22:03:39,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081601950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:39,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:39,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749434363] [2024-06-21 22:03:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:39,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:39,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:39,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 259 transitions, 3363 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) [2024-06-21 22:03:39,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:39,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:39,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:41,590 INFO L124 PetriNetUnfolderBase]: 3526/5689 cut-off events. [2024-06-21 22:03:41,590 INFO L125 PetriNetUnfolderBase]: For 293305/293307 co-relation queries the response was YES. [2024-06-21 22:03:41,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37465 conditions, 5689 events. 3526/5689 cut-off events. For 293305/293307 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34551 event pairs, 880 based on Foata normal form. 4/5692 useless extension candidates. Maximal degree in co-relation 37368. Up to 4498 conditions per place. [2024-06-21 22:03:41,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 162 selfloop transitions, 130 changer transitions 0/297 dead transitions. [2024-06-21 22:03:41,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 297 transitions, 4430 flow [2024-06-21 22:03:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 22:03:41,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 22:03:41,638 INFO L175 Difference]: Start difference. First operand has 204 places, 259 transitions, 3363 flow. Second operand 8 states and 155 transitions. [2024-06-21 22:03:41,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 297 transitions, 4430 flow [2024-06-21 22:03:42,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 297 transitions, 4231 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:42,015 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3495 flow [2024-06-21 22:03:42,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3495, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-21 22:03:42,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 22:03:42,016 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3495 flow [2024-06-21 22:03:42,016 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) [2024-06-21 22:03:42,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:42,016 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] [2024-06-21 22:03:42,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:03:42,016 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)] === [2024-06-21 22:03:42,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:42,017 INFO L85 PathProgramCache]: Analyzing trace with hash 265420729, now seen corresponding path program 4 times [2024-06-21 22:03:42,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:42,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373160832] [2024-06-21 22:03:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:45,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373160832] [2024-06-21 22:03:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373160832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:45,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:45,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:45,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778643400] [2024-06-21 22:03:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:45,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:45,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3495 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) [2024-06-21 22:03:45,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:45,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:45,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:47,067 INFO L124 PetriNetUnfolderBase]: 3536/5695 cut-off events. [2024-06-21 22:03:47,067 INFO L125 PetriNetUnfolderBase]: For 300747/300747 co-relation queries the response was YES. [2024-06-21 22:03:47,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37291 conditions, 5695 events. 3536/5695 cut-off events. For 300747/300747 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34548 event pairs, 1173 based on Foata normal form. 2/5696 useless extension candidates. Maximal degree in co-relation 37191. Up to 5302 conditions per place. [2024-06-21 22:03:47,116 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 64 changer transitions 0/289 dead transitions. [2024-06-21 22:03:47,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 289 transitions, 4184 flow [2024-06-21 22:03:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:03:47,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:03:47,119 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 3495 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:03:47,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 289 transitions, 4184 flow [2024-06-21 22:03:47,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3956 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:47,562 INFO L231 Difference]: Finished difference. Result has 213 places, 265 transitions, 3449 flow [2024-06-21 22:03:47,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3270, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3449, PETRI_PLACES=213, PETRI_TRANSITIONS=265} [2024-06-21 22:03:47,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 22:03:47,563 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 265 transitions, 3449 flow [2024-06-21 22:03:47,563 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) [2024-06-21 22:03:47,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:47,563 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] [2024-06-21 22:03:47,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:03:47,563 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)] === [2024-06-21 22:03:47,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash -308823015, now seen corresponding path program 1 times [2024-06-21 22:03:47,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:47,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067508587] [2024-06-21 22:03:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:47,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:50,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:50,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067508587] [2024-06-21 22:03:50,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067508587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:50,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:50,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605496311] [2024-06-21 22:03:50,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:50,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:50,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:50,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 265 transitions, 3449 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) [2024-06-21 22:03:50,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:50,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:50,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:52,199 INFO L124 PetriNetUnfolderBase]: 3551/5732 cut-off events. [2024-06-21 22:03:52,200 INFO L125 PetriNetUnfolderBase]: For 307649/307649 co-relation queries the response was YES. [2024-06-21 22:03:52,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37127 conditions, 5732 events. 3551/5732 cut-off events. For 307649/307649 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34850 event pairs, 1069 based on Foata normal form. 2/5733 useless extension candidates. Maximal degree in co-relation 37026. Up to 5214 conditions per place. [2024-06-21 22:03:52,347 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 59 changer transitions 0/310 dead transitions. [2024-06-21 22:03:52,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 310 transitions, 4397 flow [2024-06-21 22:03:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 22:03:52,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 22:03:52,349 INFO L175 Difference]: Start difference. First operand has 213 places, 265 transitions, 3449 flow. Second operand 8 states and 153 transitions. [2024-06-21 22:03:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 310 transitions, 4397 flow [2024-06-21 22:03:52,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 310 transitions, 4253 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:52,656 INFO L231 Difference]: Finished difference. Result has 216 places, 270 transitions, 3542 flow [2024-06-21 22:03:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3542, PETRI_PLACES=216, PETRI_TRANSITIONS=270} [2024-06-21 22:03:52,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 22:03:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 270 transitions, 3542 flow [2024-06-21 22:03:52,656 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) [2024-06-21 22:03:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:52,657 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] [2024-06-21 22:03:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:03:52,657 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)] === [2024-06-21 22:03:52,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash -53043077, now seen corresponding path program 2 times [2024-06-21 22:03:52,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:52,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623728067] [2024-06-21 22:03:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:55,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623728067] [2024-06-21 22:03:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623728067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:55,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:55,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:55,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552308722] [2024-06-21 22:03:55,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:55,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:55,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:55,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:55,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 270 transitions, 3542 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) [2024-06-21 22:03:55,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:55,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:55,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:57,734 INFO L124 PetriNetUnfolderBase]: 3568/5763 cut-off events. [2024-06-21 22:03:57,735 INFO L125 PetriNetUnfolderBase]: For 319322/319322 co-relation queries the response was YES. [2024-06-21 22:03:57,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37769 conditions, 5763 events. 3568/5763 cut-off events. For 319322/319322 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35245 event pairs, 1218 based on Foata normal form. 2/5764 useless extension candidates. Maximal degree in co-relation 37666. Up to 5385 conditions per place. [2024-06-21 22:03:57,789 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 62 changer transitions 0/308 dead transitions. [2024-06-21 22:03:57,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 308 transitions, 4393 flow [2024-06-21 22:03:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 22:03:57,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 22:03:57,790 INFO L175 Difference]: Start difference. First operand has 216 places, 270 transitions, 3542 flow. Second operand 8 states and 142 transitions. [2024-06-21 22:03:57,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 308 transitions, 4393 flow [2024-06-21 22:03:58,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 308 transitions, 4268 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:58,120 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 3701 flow [2024-06-21 22:03:58,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3701, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-21 22:03:58,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 22:03:58,121 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 3701 flow [2024-06-21 22:03:58,121 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) [2024-06-21 22:03:58,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:58,121 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] [2024-06-21 22:03:58,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:03:58,121 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)] === [2024-06-21 22:03:58,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 260656153, now seen corresponding path program 3 times [2024-06-21 22:03:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:58,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106355143] [2024-06-21 22:03:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106355143] [2024-06-21 22:04:01,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106355143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:01,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:01,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:01,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170990402] [2024-06-21 22:04:01,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:01,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:01,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:01,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 3701 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) [2024-06-21 22:04:01,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:01,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:01,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:03,658 INFO L124 PetriNetUnfolderBase]: 3563/5750 cut-off events. [2024-06-21 22:04:03,658 INFO L125 PetriNetUnfolderBase]: For 326257/326257 co-relation queries the response was YES. [2024-06-21 22:04:03,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37859 conditions, 5750 events. 3563/5750 cut-off events. For 326257/326257 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35129 event pairs, 1179 based on Foata normal form. 2/5751 useless extension candidates. Maximal degree in co-relation 37754. Up to 5378 conditions per place. [2024-06-21 22:04:03,709 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 61 changer transitions 0/301 dead transitions. [2024-06-21 22:04:03,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 4374 flow [2024-06-21 22:04:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:04:03,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:04:03,710 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 3701 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:04:03,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 4374 flow [2024-06-21 22:04:04,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 301 transitions, 4233 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:04,045 INFO L231 Difference]: Finished difference. Result has 224 places, 279 transitions, 3727 flow [2024-06-21 22:04:04,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3727, PETRI_PLACES=224, PETRI_TRANSITIONS=279} [2024-06-21 22:04:04,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 22:04:04,046 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 279 transitions, 3727 flow [2024-06-21 22:04:04,046 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) [2024-06-21 22:04:04,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:04,046 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] [2024-06-21 22:04:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:04:04,046 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)] === [2024-06-21 22:04:04,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash -18359591, now seen corresponding path program 1 times [2024-06-21 22:04:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:04,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776068147] [2024-06-21 22:04:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:04,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:07,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:07,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776068147] [2024-06-21 22:04:07,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776068147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:07,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:07,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224551765] [2024-06-21 22:04:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:07,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:07,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:07,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 279 transitions, 3727 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) [2024-06-21 22:04:07,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:07,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:07,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:09,114 INFO L124 PetriNetUnfolderBase]: 3669/5936 cut-off events. [2024-06-21 22:04:09,114 INFO L125 PetriNetUnfolderBase]: For 365333/365335 co-relation queries the response was YES. [2024-06-21 22:04:09,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39931 conditions, 5936 events. 3669/5936 cut-off events. For 365333/365335 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36498 event pairs, 1109 based on Foata normal form. 4/5939 useless extension candidates. Maximal degree in co-relation 39824. Up to 5046 conditions per place. [2024-06-21 22:04:09,173 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 104 changer transitions 0/327 dead transitions. [2024-06-21 22:04:09,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 327 transitions, 4733 flow [2024-06-21 22:04:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 22:04:09,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 22:04:09,174 INFO L175 Difference]: Start difference. First operand has 224 places, 279 transitions, 3727 flow. Second operand 8 states and 157 transitions. [2024-06-21 22:04:09,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 327 transitions, 4733 flow [2024-06-21 22:04:09,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4624 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:09,658 INFO L231 Difference]: Finished difference. Result has 229 places, 285 transitions, 3955 flow [2024-06-21 22:04:09,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3955, PETRI_PLACES=229, PETRI_TRANSITIONS=285} [2024-06-21 22:04:09,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 22:04:09,659 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 285 transitions, 3955 flow [2024-06-21 22:04:09,659 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) [2024-06-21 22:04:09,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:09,659 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] [2024-06-21 22:04:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:04:09,659 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)] === [2024-06-21 22:04:09,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1739204867, now seen corresponding path program 2 times [2024-06-21 22:04:09,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:09,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571729254] [2024-06-21 22:04:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571729254] [2024-06-21 22:04:13,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571729254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:13,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:13,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:13,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491785447] [2024-06-21 22:04:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:13,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:13,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:13,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 285 transitions, 3955 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) [2024-06-21 22:04:13,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:13,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:13,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:15,274 INFO L124 PetriNetUnfolderBase]: 3664/5935 cut-off events. [2024-06-21 22:04:15,274 INFO L125 PetriNetUnfolderBase]: For 375569/375571 co-relation queries the response was YES. [2024-06-21 22:04:15,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40565 conditions, 5935 events. 3664/5935 cut-off events. For 375569/375571 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 36520 event pairs, 1112 based on Foata normal form. 4/5938 useless extension candidates. Maximal degree in co-relation 40456. Up to 5181 conditions per place. [2024-06-21 22:04:15,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 101 changer transitions 0/317 dead transitions. [2024-06-21 22:04:15,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 317 transitions, 4682 flow [2024-06-21 22:04:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:04:15,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:04:15,324 INFO L175 Difference]: Start difference. First operand has 229 places, 285 transitions, 3955 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:04:15,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 317 transitions, 4682 flow [2024-06-21 22:04:15,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 317 transitions, 4478 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:15,853 INFO L231 Difference]: Finished difference. Result has 232 places, 285 transitions, 3961 flow [2024-06-21 22:04:15,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3961, PETRI_PLACES=232, PETRI_TRANSITIONS=285} [2024-06-21 22:04:15,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 22:04:15,854 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 285 transitions, 3961 flow [2024-06-21 22:04:15,854 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) [2024-06-21 22:04:15,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:15,854 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] [2024-06-21 22:04:15,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:04:15,854 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)] === [2024-06-21 22:04:15,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:15,855 INFO L85 PathProgramCache]: Analyzing trace with hash 265427673, now seen corresponding path program 3 times [2024-06-21 22:04:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455908855] [2024-06-21 22:04:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:19,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455908855] [2024-06-21 22:04:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455908855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844167999] [2024-06-21 22:04:19,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:19,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:19,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 285 transitions, 3961 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) [2024-06-21 22:04:19,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:19,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:19,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:21,532 INFO L124 PetriNetUnfolderBase]: 3708/5979 cut-off events. [2024-06-21 22:04:21,532 INFO L125 PetriNetUnfolderBase]: For 405265/405265 co-relation queries the response was YES. [2024-06-21 22:04:21,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41104 conditions, 5979 events. 3708/5979 cut-off events. For 405265/405265 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 36654 event pairs, 1184 based on Foata normal form. 12/5990 useless extension candidates. Maximal degree in co-relation 40994. Up to 5521 conditions per place. [2024-06-21 22:04:21,595 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 61 changer transitions 13/315 dead transitions. [2024-06-21 22:04:21,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 315 transitions, 4741 flow [2024-06-21 22:04:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:04:21,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 22:04:21,597 INFO L175 Difference]: Start difference. First operand has 232 places, 285 transitions, 3961 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:04:21,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 315 transitions, 4741 flow [2024-06-21 22:04:22,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 315 transitions, 4527 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:22,126 INFO L231 Difference]: Finished difference. Result has 234 places, 279 transitions, 3785 flow [2024-06-21 22:04:22,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=234, PETRI_TRANSITIONS=279} [2024-06-21 22:04:22,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 22:04:22,127 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 279 transitions, 3785 flow [2024-06-21 22:04:22,127 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) [2024-06-21 22:04:22,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:22,128 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] [2024-06-21 22:04:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:04:22,128 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)] === [2024-06-21 22:04:22,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1699463097, now seen corresponding path program 5 times [2024-06-21 22:04:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288096751] [2024-06-21 22:04:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288096751] [2024-06-21 22:04:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288096751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:24,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:24,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:24,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324508568] [2024-06-21 22:04:24,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:24,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:24,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:24,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 279 transitions, 3785 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) [2024-06-21 22:04:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:24,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:26,866 INFO L124 PetriNetUnfolderBase]: 3664/5909 cut-off events. [2024-06-21 22:04:26,866 INFO L125 PetriNetUnfolderBase]: For 399192/399192 co-relation queries the response was YES. [2024-06-21 22:04:26,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40675 conditions, 5909 events. 3664/5909 cut-off events. For 399192/399192 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 36105 event pairs, 929 based on Foata normal form. 2/5905 useless extension candidates. Maximal degree in co-relation 40564. Up to 4703 conditions per place. [2024-06-21 22:04:26,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 113 changer transitions 0/316 dead transitions. [2024-06-21 22:04:26,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 316 transitions, 4804 flow [2024-06-21 22:04:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 22:04:26,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 22:04:26,933 INFO L175 Difference]: Start difference. First operand has 234 places, 279 transitions, 3785 flow. Second operand 8 states and 153 transitions. [2024-06-21 22:04:26,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 316 transitions, 4804 flow [2024-06-21 22:04:27,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 316 transitions, 4665 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:27,466 INFO L231 Difference]: Finished difference. Result has 236 places, 282 transitions, 3928 flow [2024-06-21 22:04:27,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3928, PETRI_PLACES=236, PETRI_TRANSITIONS=282} [2024-06-21 22:04:27,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 22:04:27,467 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 282 transitions, 3928 flow [2024-06-21 22:04:27,467 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) [2024-06-21 22:04:27,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:27,467 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] [2024-06-21 22:04:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:04:27,467 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)] === [2024-06-21 22:04:27,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1756449829, now seen corresponding path program 6 times [2024-06-21 22:04:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:27,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159018488] [2024-06-21 22:04:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:30,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:30,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159018488] [2024-06-21 22:04:30,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159018488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:30,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:30,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482118724] [2024-06-21 22:04:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:30,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:30,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:30,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 282 transitions, 3928 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) [2024-06-21 22:04:30,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:30,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:30,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:32,606 INFO L124 PetriNetUnfolderBase]: 3674/5929 cut-off events. [2024-06-21 22:04:32,607 INFO L125 PetriNetUnfolderBase]: For 412905/412905 co-relation queries the response was YES. [2024-06-21 22:04:32,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41362 conditions, 5929 events. 3674/5929 cut-off events. For 412905/412905 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 36291 event pairs, 927 based on Foata normal form. 2/5926 useless extension candidates. Maximal degree in co-relation 41250. Up to 4709 conditions per place. [2024-06-21 22:04:32,660 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 113 changer transitions 0/315 dead transitions. [2024-06-21 22:04:32,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 315 transitions, 4945 flow [2024-06-21 22:04:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 22:04:32,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 22:04:32,661 INFO L175 Difference]: Start difference. First operand has 236 places, 282 transitions, 3928 flow. Second operand 8 states and 148 transitions. [2024-06-21 22:04:32,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 315 transitions, 4945 flow [2024-06-21 22:04:33,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 315 transitions, 4568 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 22:04:33,175 INFO L231 Difference]: Finished difference. Result has 236 places, 285 transitions, 3840 flow [2024-06-21 22:04:33,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=228, 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=8, PETRI_FLOW=3840, PETRI_PLACES=236, PETRI_TRANSITIONS=285} [2024-06-21 22:04:33,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 22:04:33,176 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 285 transitions, 3840 flow [2024-06-21 22:04:33,176 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) [2024-06-21 22:04:33,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:33,176 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] [2024-06-21 22:04:33,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:04:33,176 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)] === [2024-06-21 22:04:33,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1264813895, now seen corresponding path program 7 times [2024-06-21 22:04:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:33,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480673262] [2024-06-21 22:04:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:33,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:36,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:36,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480673262] [2024-06-21 22:04:36,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480673262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:36,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:36,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:36,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925826673] [2024-06-21 22:04:36,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:36,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:36,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:36,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:36,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 285 transitions, 3840 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) [2024-06-21 22:04:36,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:36,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:36,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:38,213 INFO L124 PetriNetUnfolderBase]: 3736/6027 cut-off events. [2024-06-21 22:04:38,214 INFO L125 PetriNetUnfolderBase]: For 440466/440466 co-relation queries the response was YES. [2024-06-21 22:04:38,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41893 conditions, 6027 events. 3736/6027 cut-off events. For 440466/440466 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 37044 event pairs, 944 based on Foata normal form. 6/6028 useless extension candidates. Maximal degree in co-relation 41783. Up to 4755 conditions per place. [2024-06-21 22:04:38,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 116 changer transitions 0/319 dead transitions. [2024-06-21 22:04:38,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 319 transitions, 4890 flow [2024-06-21 22:04:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:04:38,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:04:38,271 INFO L175 Difference]: Start difference. First operand has 236 places, 285 transitions, 3840 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:04:38,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 319 transitions, 4890 flow [2024-06-21 22:04:38,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 319 transitions, 4659 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:38,870 INFO L231 Difference]: Finished difference. Result has 239 places, 292 transitions, 3948 flow [2024-06-21 22:04:38,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3619, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3948, PETRI_PLACES=239, PETRI_TRANSITIONS=292} [2024-06-21 22:04:38,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 22:04:38,871 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 292 transitions, 3948 flow [2024-06-21 22:04:38,871 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) [2024-06-21 22:04:38,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:38,871 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] [2024-06-21 22:04:38,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:04:38,871 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)] === [2024-06-21 22:04:38,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1114826989, now seen corresponding path program 8 times [2024-06-21 22:04:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:38,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465322870] [2024-06-21 22:04:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:38,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:42,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:42,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465322870] [2024-06-21 22:04:42,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465322870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:42,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:42,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:42,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142114439] [2024-06-21 22:04:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:42,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:42,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:42,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:42,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 292 transitions, 3948 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) [2024-06-21 22:04:42,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:42,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:42,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:44,290 INFO L124 PetriNetUnfolderBase]: 3718/6019 cut-off events. [2024-06-21 22:04:44,290 INFO L125 PetriNetUnfolderBase]: For 442688/442688 co-relation queries the response was YES. [2024-06-21 22:04:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41637 conditions, 6019 events. 3718/6019 cut-off events. For 442688/442688 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 37115 event pairs, 1138 based on Foata normal form. 6/6020 useless extension candidates. Maximal degree in co-relation 41526. Up to 5302 conditions per place. [2024-06-21 22:04:44,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 80 changer transitions 0/318 dead transitions. [2024-06-21 22:04:44,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4890 flow [2024-06-21 22:04:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 22:04:44,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:04:44,343 INFO L175 Difference]: Start difference. First operand has 239 places, 292 transitions, 3948 flow. Second operand 10 states and 170 transitions. [2024-06-21 22:04:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4890 flow [2024-06-21 22:04:44,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 318 transitions, 4712 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:44,846 INFO L231 Difference]: Finished difference. Result has 245 places, 292 transitions, 3937 flow [2024-06-21 22:04:44,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3770, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3937, PETRI_PLACES=245, PETRI_TRANSITIONS=292} [2024-06-21 22:04:44,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 22:04:44,847 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 292 transitions, 3937 flow [2024-06-21 22:04:44,847 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) [2024-06-21 22:04:44,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:44,848 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] [2024-06-21 22:04:44,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:04:44,848 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)] === [2024-06-21 22:04:44,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1889224811, now seen corresponding path program 9 times [2024-06-21 22:04:44,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:44,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002974394] [2024-06-21 22:04:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:47,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002974394] [2024-06-21 22:04:47,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002974394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:47,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:47,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:47,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037609755] [2024-06-21 22:04:47,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:47,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:47,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:47,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:47,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 292 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) [2024-06-21 22:04:47,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:47,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:49,689 INFO L124 PetriNetUnfolderBase]: 3700/5991 cut-off events. [2024-06-21 22:04:49,689 INFO L125 PetriNetUnfolderBase]: For 443467/443467 co-relation queries the response was YES. [2024-06-21 22:04:49,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41072 conditions, 5991 events. 3700/5991 cut-off events. For 443467/443467 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 36941 event pairs, 1148 based on Foata normal form. 6/5992 useless extension candidates. Maximal degree in co-relation 40960. Up to 5291 conditions per place. [2024-06-21 22:04:49,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 75 changer transitions 0/312 dead transitions. [2024-06-21 22:04:49,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 312 transitions, 4731 flow [2024-06-21 22:04:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:04:49,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 22:04:49,748 INFO L175 Difference]: Start difference. First operand has 245 places, 292 transitions, 3937 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:04:49,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 312 transitions, 4731 flow [2024-06-21 22:04:50,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 312 transitions, 4406 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 22:04:50,343 INFO L231 Difference]: Finished difference. Result has 243 places, 292 transitions, 3769 flow [2024-06-21 22:04:50,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3769, PETRI_PLACES=243, PETRI_TRANSITIONS=292} [2024-06-21 22:04:50,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 22:04:50,343 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 292 transitions, 3769 flow [2024-06-21 22:04:50,343 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) [2024-06-21 22:04:50,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:50,343 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] [2024-06-21 22:04:50,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:04:50,344 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)] === [2024-06-21 22:04:50,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -279430105, now seen corresponding path program 4 times [2024-06-21 22:04:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:50,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976074070] [2024-06-21 22:04:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:53,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:53,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976074070] [2024-06-21 22:04:53,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976074070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:53,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:53,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563409114] [2024-06-21 22:04:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:53,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:53,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:53,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 292 transitions, 3769 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) [2024-06-21 22:04:53,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:53,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:53,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:55,376 INFO L124 PetriNetUnfolderBase]: 3878/6327 cut-off events. [2024-06-21 22:04:55,376 INFO L125 PetriNetUnfolderBase]: For 506269/506269 co-relation queries the response was YES. [2024-06-21 22:04:55,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44463 conditions, 6327 events. 3878/6327 cut-off events. For 506269/506269 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39791 event pairs, 1154 based on Foata normal form. 2/6327 useless extension candidates. Maximal degree in co-relation 44350. Up to 5299 conditions per place. [2024-06-21 22:04:55,444 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 91 changer transitions 0/335 dead transitions. [2024-06-21 22:04:55,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 335 transitions, 4801 flow [2024-06-21 22:04:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 22:04:55,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 22:04:55,445 INFO L175 Difference]: Start difference. First operand has 243 places, 292 transitions, 3769 flow. Second operand 8 states and 151 transitions. [2024-06-21 22:04:55,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 335 transitions, 4801 flow [2024-06-21 22:04:56,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 335 transitions, 4626 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:04:56,232 INFO L231 Difference]: Finished difference. Result has 244 places, 298 transitions, 3914 flow [2024-06-21 22:04:56,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3914, PETRI_PLACES=244, PETRI_TRANSITIONS=298} [2024-06-21 22:04:56,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 22:04:56,233 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 298 transitions, 3914 flow [2024-06-21 22:04:56,233 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) [2024-06-21 22:04:56,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:56,233 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] [2024-06-21 22:04:56,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:04:56,234 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)] === [2024-06-21 22:04:56,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:56,234 INFO L85 PathProgramCache]: Analyzing trace with hash 938441013, now seen corresponding path program 5 times [2024-06-21 22:04:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285280219] [2024-06-21 22:04:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:59,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:59,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285280219] [2024-06-21 22:04:59,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285280219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:59,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:59,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:59,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84102529] [2024-06-21 22:04:59,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:59,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:59,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:59,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:59,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:59,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:59,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 298 transitions, 3914 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) [2024-06-21 22:04:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:01,557 INFO L124 PetriNetUnfolderBase]: 3886/6345 cut-off events. [2024-06-21 22:05:01,557 INFO L125 PetriNetUnfolderBase]: For 522142/522142 co-relation queries the response was YES. [2024-06-21 22:05:01,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45223 conditions, 6345 events. 3886/6345 cut-off events. For 522142/522142 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39962 event pairs, 1161 based on Foata normal form. 2/6345 useless extension candidates. Maximal degree in co-relation 45108. Up to 5519 conditions per place. [2024-06-21 22:05:01,615 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 86 changer transitions 0/327 dead transitions. [2024-06-21 22:05:01,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 327 transitions, 4683 flow [2024-06-21 22:05:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:05:01,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 22:05:01,617 INFO L175 Difference]: Start difference. First operand has 244 places, 298 transitions, 3914 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:05:01,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 327 transitions, 4683 flow [2024-06-21 22:05:02,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 327 transitions, 4480 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:02,375 INFO L231 Difference]: Finished difference. Result has 247 places, 300 transitions, 3935 flow [2024-06-21 22:05:02,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=247, PETRI_TRANSITIONS=300} [2024-06-21 22:05:02,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 22:05:02,376 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 300 transitions, 3935 flow [2024-06-21 22:05:02,376 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) [2024-06-21 22:05:02,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:02,376 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] [2024-06-21 22:05:02,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:05:02,376 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)] === [2024-06-21 22:05:02,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash -854394057, now seen corresponding path program 6 times [2024-06-21 22:05:02,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:02,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326066177] [2024-06-21 22:05:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:05,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326066177] [2024-06-21 22:05:05,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326066177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:05,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:05,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:05,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396679523] [2024-06-21 22:05:05,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:05,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:05,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 300 transitions, 3935 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) [2024-06-21 22:05:05,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:05,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:05,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:07,618 INFO L124 PetriNetUnfolderBase]: 3894/6359 cut-off events. [2024-06-21 22:05:07,619 INFO L125 PetriNetUnfolderBase]: For 537027/537027 co-relation queries the response was YES. [2024-06-21 22:05:07,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45356 conditions, 6359 events. 3894/6359 cut-off events. For 537027/537027 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39922 event pairs, 1038 based on Foata normal form. 2/6359 useless extension candidates. Maximal degree in co-relation 45240. Up to 4161 conditions per place. [2024-06-21 22:05:07,685 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 109 changer transitions 0/345 dead transitions. [2024-06-21 22:05:07,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 345 transitions, 5106 flow [2024-06-21 22:05:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 22:05:07,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 22:05:07,686 INFO L175 Difference]: Start difference. First operand has 247 places, 300 transitions, 3935 flow. Second operand 8 states and 155 transitions. [2024-06-21 22:05:07,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 345 transitions, 5106 flow [2024-06-21 22:05:08,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4920 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:08,396 INFO L231 Difference]: Finished difference. Result has 250 places, 303 transitions, 4045 flow [2024-06-21 22:05:08,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3749, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4045, PETRI_PLACES=250, PETRI_TRANSITIONS=303} [2024-06-21 22:05:08,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 22:05:08,397 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 303 transitions, 4045 flow [2024-06-21 22:05:08,397 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) [2024-06-21 22:05:08,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:08,397 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] [2024-06-21 22:05:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:05:08,397 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)] === [2024-06-21 22:05:08,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash -842966217, now seen corresponding path program 7 times [2024-06-21 22:05:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:08,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905958428] [2024-06-21 22:05:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:08,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:11,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:11,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905958428] [2024-06-21 22:05:11,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905958428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:11,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:11,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600746385] [2024-06-21 22:05:11,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:11,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:11,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:11,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 303 transitions, 4045 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) [2024-06-21 22:05:11,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:11,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:11,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:13,922 INFO L124 PetriNetUnfolderBase]: 3861/6298 cut-off events. [2024-06-21 22:05:13,923 INFO L125 PetriNetUnfolderBase]: For 552000/552000 co-relation queries the response was YES. [2024-06-21 22:05:13,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45316 conditions, 6298 events. 3861/6298 cut-off events. For 552000/552000 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39434 event pairs, 1084 based on Foata normal form. 10/6306 useless extension candidates. Maximal degree in co-relation 45198. Up to 4143 conditions per place. [2024-06-21 22:05:13,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 101 changer transitions 0/341 dead transitions. [2024-06-21 22:05:13,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 341 transitions, 4995 flow [2024-06-21 22:05:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 22:05:13,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 22:05:13,982 INFO L175 Difference]: Start difference. First operand has 250 places, 303 transitions, 4045 flow. Second operand 8 states and 151 transitions. [2024-06-21 22:05:13,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 341 transitions, 4995 flow [2024-06-21 22:05:14,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 341 transitions, 4804 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:14,593 INFO L231 Difference]: Finished difference. Result has 254 places, 303 transitions, 4062 flow [2024-06-21 22:05:14,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4062, PETRI_PLACES=254, PETRI_TRANSITIONS=303} [2024-06-21 22:05:14,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 22:05:14,593 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 303 transitions, 4062 flow [2024-06-21 22:05:14,593 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) [2024-06-21 22:05:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:14,593 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] [2024-06-21 22:05:14,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:05:14,593 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)] === [2024-06-21 22:05:14,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1422040989, now seen corresponding path program 8 times [2024-06-21 22:05:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:14,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353728145] [2024-06-21 22:05:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:18,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353728145] [2024-06-21 22:05:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353728145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:18,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:18,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135836447] [2024-06-21 22:05:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:18,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:18,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:18,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 303 transitions, 4062 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) [2024-06-21 22:05:18,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:18,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:20,337 INFO L124 PetriNetUnfolderBase]: 3828/6259 cut-off events. [2024-06-21 22:05:20,337 INFO L125 PetriNetUnfolderBase]: For 541573/541573 co-relation queries the response was YES. [2024-06-21 22:05:20,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44165 conditions, 6259 events. 3828/6259 cut-off events. For 541573/541573 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39447 event pairs, 1137 based on Foata normal form. 14/6271 useless extension candidates. Maximal degree in co-relation 44046. Up to 5383 conditions per place. [2024-06-21 22:05:20,405 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 83 changer transitions 0/332 dead transitions. [2024-06-21 22:05:20,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 332 transitions, 4818 flow [2024-06-21 22:05:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:05:20,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:05:20,406 INFO L175 Difference]: Start difference. First operand has 254 places, 303 transitions, 4062 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:05:20,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 332 transitions, 4818 flow [2024-06-21 22:05:21,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 332 transitions, 4598 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:21,095 INFO L231 Difference]: Finished difference. Result has 255 places, 303 transitions, 4014 flow [2024-06-21 22:05:21,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4014, PETRI_PLACES=255, PETRI_TRANSITIONS=303} [2024-06-21 22:05:21,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 22:05:21,096 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 303 transitions, 4014 flow [2024-06-21 22:05:21,096 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) [2024-06-21 22:05:21,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:21,096 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] [2024-06-21 22:05:21,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:05:21,096 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)] === [2024-06-21 22:05:21,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash -296006047, now seen corresponding path program 9 times [2024-06-21 22:05:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:21,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436336521] [2024-06-21 22:05:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:21,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:24,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:24,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436336521] [2024-06-21 22:05:24,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436336521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:24,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:24,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607083175] [2024-06-21 22:05:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:24,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:24,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:24,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:24,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:24,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 303 transitions, 4014 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) [2024-06-21 22:05:24,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:24,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:26,191 INFO L124 PetriNetUnfolderBase]: 3785/6190 cut-off events. [2024-06-21 22:05:26,191 INFO L125 PetriNetUnfolderBase]: For 518698/518698 co-relation queries the response was YES. [2024-06-21 22:05:26,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42652 conditions, 6190 events. 3785/6190 cut-off events. For 518698/518698 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38947 event pairs, 1104 based on Foata normal form. 14/6202 useless extension candidates. Maximal degree in co-relation 42532. Up to 5020 conditions per place. [2024-06-21 22:05:26,247 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 88 changer transitions 0/336 dead transitions. [2024-06-21 22:05:26,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 336 transitions, 4808 flow [2024-06-21 22:05:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:05:26,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:05:26,248 INFO L175 Difference]: Start difference. First operand has 255 places, 303 transitions, 4014 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:05:26,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 336 transitions, 4808 flow [2024-06-21 22:05:26,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 336 transitions, 4620 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:26,857 INFO L231 Difference]: Finished difference. Result has 257 places, 303 transitions, 4009 flow [2024-06-21 22:05:26,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4009, PETRI_PLACES=257, PETRI_TRANSITIONS=303} [2024-06-21 22:05:26,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 22:05:26,858 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 303 transitions, 4009 flow [2024-06-21 22:05:26,858 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) [2024-06-21 22:05:26,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:26,858 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] [2024-06-21 22:05:26,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:05:26,858 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)] === [2024-06-21 22:05:26,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 470933179, now seen corresponding path program 10 times [2024-06-21 22:05:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870156557] [2024-06-21 22:05:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:30,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870156557] [2024-06-21 22:05:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870156557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:30,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473950351] [2024-06-21 22:05:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:30,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:30,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 303 transitions, 4009 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) [2024-06-21 22:05:30,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:30,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:30,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:32,090 INFO L124 PetriNetUnfolderBase]: 3595/5864 cut-off events. [2024-06-21 22:05:32,090 INFO L125 PetriNetUnfolderBase]: For 496920/496920 co-relation queries the response was YES. [2024-06-21 22:05:32,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36629 conditions, 5864 events. 3595/5864 cut-off events. For 496920/496920 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36731 event pairs, 1009 based on Foata normal form. 68/5927 useless extension candidates. Maximal degree in co-relation 36508. Up to 4896 conditions per place. [2024-06-21 22:05:32,149 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 71 changer transitions 7/333 dead transitions. [2024-06-21 22:05:32,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 333 transitions, 4771 flow [2024-06-21 22:05:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 22:05:32,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:05:32,150 INFO L175 Difference]: Start difference. First operand has 257 places, 303 transitions, 4009 flow. Second operand 10 states and 170 transitions. [2024-06-21 22:05:32,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 333 transitions, 4771 flow [2024-06-21 22:05:32,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 333 transitions, 4562 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:32,891 INFO L231 Difference]: Finished difference. Result has 260 places, 298 transitions, 3877 flow [2024-06-21 22:05:32,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3877, PETRI_PLACES=260, PETRI_TRANSITIONS=298} [2024-06-21 22:05:32,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 22:05:32,892 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 298 transitions, 3877 flow [2024-06-21 22:05:32,892 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) [2024-06-21 22:05:32,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:32,892 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] [2024-06-21 22:05:32,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:05:32,892 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)] === [2024-06-21 22:05:32,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1027940347, now seen corresponding path program 11 times [2024-06-21 22:05:32,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:32,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629599928] [2024-06-21 22:05:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:36,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:36,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629599928] [2024-06-21 22:05:36,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629599928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:36,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:36,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:36,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084317813] [2024-06-21 22:05:36,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:36,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:36,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 298 transitions, 3877 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) [2024-06-21 22:05:36,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:36,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:36,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:38,379 INFO L124 PetriNetUnfolderBase]: 3230/5281 cut-off events. [2024-06-21 22:05:38,379 INFO L125 PetriNetUnfolderBase]: For 328351/328351 co-relation queries the response was YES. [2024-06-21 22:05:38,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32932 conditions, 5281 events. 3230/5281 cut-off events. For 328351/328351 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 32866 event pairs, 876 based on Foata normal form. 14/5290 useless extension candidates. Maximal degree in co-relation 32810. Up to 4625 conditions per place. [2024-06-21 22:05:38,437 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 67 changer transitions 0/321 dead transitions. [2024-06-21 22:05:38,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 321 transitions, 4589 flow [2024-06-21 22:05:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:05:38,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 22:05:38,438 INFO L175 Difference]: Start difference. First operand has 260 places, 298 transitions, 3877 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:05:38,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 321 transitions, 4589 flow [2024-06-21 22:05:38,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 321 transitions, 4226 flow, removed 14 selfloop flow, removed 15 redundant places. [2024-06-21 22:05:38,951 INFO L231 Difference]: Finished difference. Result has 253 places, 298 transitions, 3654 flow [2024-06-21 22:05:38,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3654, PETRI_PLACES=253, PETRI_TRANSITIONS=298} [2024-06-21 22:05:38,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 22:05:38,952 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 298 transitions, 3654 flow [2024-06-21 22:05:38,952 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) [2024-06-21 22:05:38,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:38,952 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] [2024-06-21 22:05:38,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:05:38,952 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)] === [2024-06-21 22:05:38,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash -794101031, now seen corresponding path program 12 times [2024-06-21 22:05:38,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:38,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817382522] [2024-06-21 22:05:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:38,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:42,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817382522] [2024-06-21 22:05:42,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817382522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:42,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:42,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:42,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728776820] [2024-06-21 22:05:42,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:42,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:42,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:42,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 298 transitions, 3654 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) [2024-06-21 22:05:42,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:42,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:44,125 INFO L124 PetriNetUnfolderBase]: 3187/5210 cut-off events. [2024-06-21 22:05:44,125 INFO L125 PetriNetUnfolderBase]: For 292882/292882 co-relation queries the response was YES. [2024-06-21 22:05:44,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30798 conditions, 5210 events. 3187/5210 cut-off events. For 292882/292882 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32305 event pairs, 823 based on Foata normal form. 14/5219 useless extension candidates. Maximal degree in co-relation 30678. Up to 4086 conditions per place. [2024-06-21 22:05:44,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 73 changer transitions 0/325 dead transitions. [2024-06-21 22:05:44,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 325 transitions, 4404 flow [2024-06-21 22:05:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:05:44,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:05:44,168 INFO L175 Difference]: Start difference. First operand has 253 places, 298 transitions, 3654 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:05:44,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 325 transitions, 4404 flow [2024-06-21 22:05:44,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 325 transitions, 4238 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:44,818 INFO L231 Difference]: Finished difference. Result has 254 places, 298 transitions, 3642 flow [2024-06-21 22:05:44,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3642, PETRI_PLACES=254, PETRI_TRANSITIONS=298} [2024-06-21 22:05:44,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 22:05:44,818 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 298 transitions, 3642 flow [2024-06-21 22:05:44,818 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) [2024-06-21 22:05:44,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:44,819 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] [2024-06-21 22:05:44,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:05:44,819 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)] === [2024-06-21 22:05:44,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 700322046, now seen corresponding path program 1 times [2024-06-21 22:05:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851678614] [2024-06-21 22:05:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:47,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:47,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851678614] [2024-06-21 22:05:47,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851678614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:47,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:47,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:47,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952777054] [2024-06-21 22:05:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:47,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:47,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:47,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 298 transitions, 3642 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) [2024-06-21 22:05:47,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:47,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:47,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:49,498 INFO L124 PetriNetUnfolderBase]: 3207/5260 cut-off events. [2024-06-21 22:05:49,499 INFO L125 PetriNetUnfolderBase]: For 273126/273126 co-relation queries the response was YES. [2024-06-21 22:05:49,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30995 conditions, 5260 events. 3207/5260 cut-off events. For 273126/273126 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 32809 event pairs, 665 based on Foata normal form. 4/5259 useless extension candidates. Maximal degree in co-relation 30874. Up to 4292 conditions per place. [2024-06-21 22:05:49,546 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 110 changer transitions 0/323 dead transitions. [2024-06-21 22:05:49,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 323 transitions, 4380 flow [2024-06-21 22:05:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 22:05:49,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 22:05:49,547 INFO L175 Difference]: Start difference. First operand has 254 places, 298 transitions, 3642 flow. Second operand 7 states and 131 transitions. [2024-06-21 22:05:49,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 323 transitions, 4380 flow [2024-06-21 22:05:50,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 323 transitions, 4198 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:50,241 INFO L231 Difference]: Finished difference. Result has 253 places, 301 transitions, 3740 flow [2024-06-21 22:05:50,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=253, PETRI_TRANSITIONS=301} [2024-06-21 22:05:50,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 22:05:50,242 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 301 transitions, 3740 flow [2024-06-21 22:05:50,242 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) [2024-06-21 22:05:50,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:50,242 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] [2024-06-21 22:05:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:05:50,242 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)] === [2024-06-21 22:05:50,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash 670444518, now seen corresponding path program 2 times [2024-06-21 22:05:50,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:50,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452820772] [2024-06-21 22:05:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:53,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452820772] [2024-06-21 22:05:53,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452820772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:53,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:53,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:53,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022693480] [2024-06-21 22:05:53,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:53,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:53,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:53,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:53,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 301 transitions, 3740 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) [2024-06-21 22:05:53,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:53,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:53,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:55,388 INFO L124 PetriNetUnfolderBase]: 3227/5288 cut-off events. [2024-06-21 22:05:55,388 INFO L125 PetriNetUnfolderBase]: For 279362/279362 co-relation queries the response was YES. [2024-06-21 22:05:55,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31214 conditions, 5288 events. 3227/5288 cut-off events. For 279362/279362 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32953 event pairs, 709 based on Foata normal form. 4/5287 useless extension candidates. Maximal degree in co-relation 31092. Up to 3972 conditions per place. [2024-06-21 22:05:55,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 129 changer transitions 0/333 dead transitions. [2024-06-21 22:05:55,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 333 transitions, 4678 flow [2024-06-21 22:05:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:05:55,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:05:55,443 INFO L175 Difference]: Start difference. First operand has 253 places, 301 transitions, 3740 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:05:55,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 333 transitions, 4678 flow [2024-06-21 22:05:56,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 333 transitions, 4444 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:56,201 INFO L231 Difference]: Finished difference. Result has 255 places, 304 transitions, 3815 flow [2024-06-21 22:05:56,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3815, PETRI_PLACES=255, PETRI_TRANSITIONS=304} [2024-06-21 22:05:56,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 22:05:56,202 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 304 transitions, 3815 flow [2024-06-21 22:05:56,202 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) [2024-06-21 22:05:56,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:56,202 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] [2024-06-21 22:05:56,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:05:56,202 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)] === [2024-06-21 22:05:56,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1380804256, now seen corresponding path program 3 times [2024-06-21 22:05:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:56,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382936172] [2024-06-21 22:05:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:59,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:59,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382936172] [2024-06-21 22:05:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382936172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:59,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:59,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196353936] [2024-06-21 22:05:59,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:59,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:59,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 304 transitions, 3815 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) [2024-06-21 22:05:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:01,286 INFO L124 PetriNetUnfolderBase]: 3247/5312 cut-off events. [2024-06-21 22:06:01,286 INFO L125 PetriNetUnfolderBase]: For 280512/280512 co-relation queries the response was YES. [2024-06-21 22:06:01,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31474 conditions, 5312 events. 3247/5312 cut-off events. For 280512/280512 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33074 event pairs, 707 based on Foata normal form. 4/5311 useless extension candidates. Maximal degree in co-relation 31352. Up to 3988 conditions per place. [2024-06-21 22:06:01,342 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 127 changer transitions 0/334 dead transitions. [2024-06-21 22:06:01,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 334 transitions, 4897 flow [2024-06-21 22:06:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:06:01,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:06:01,343 INFO L175 Difference]: Start difference. First operand has 255 places, 304 transitions, 3815 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:06:01,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 334 transitions, 4897 flow [2024-06-21 22:06:02,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 334 transitions, 4596 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:02,045 INFO L231 Difference]: Finished difference. Result has 257 places, 307 transitions, 3824 flow [2024-06-21 22:06:02,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3824, PETRI_PLACES=257, PETRI_TRANSITIONS=307} [2024-06-21 22:06:02,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 22:06:02,045 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 307 transitions, 3824 flow [2024-06-21 22:06:02,046 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) [2024-06-21 22:06:02,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:02,046 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] [2024-06-21 22:06:02,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:06:02,046 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)] === [2024-06-21 22:06:02,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash 966019908, now seen corresponding path program 4 times [2024-06-21 22:06:02,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:02,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959985395] [2024-06-21 22:06:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:04,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:04,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959985395] [2024-06-21 22:06:04,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959985395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:04,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:04,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634643313] [2024-06-21 22:06:04,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:04,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:05,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:05,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 307 transitions, 3824 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) [2024-06-21 22:06:05,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:05,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:05,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:06,773 INFO L124 PetriNetUnfolderBase]: 3235/5300 cut-off events. [2024-06-21 22:06:06,773 INFO L125 PetriNetUnfolderBase]: For 275182/275182 co-relation queries the response was YES. [2024-06-21 22:06:06,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30938 conditions, 5300 events. 3235/5300 cut-off events. For 275182/275182 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33049 event pairs, 703 based on Foata normal form. 4/5299 useless extension candidates. Maximal degree in co-relation 30816. Up to 3980 conditions per place. [2024-06-21 22:06:06,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 132 changer transitions 0/333 dead transitions. [2024-06-21 22:06:06,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 333 transitions, 4706 flow [2024-06-21 22:06:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:06:06,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:06:06,829 INFO L175 Difference]: Start difference. First operand has 257 places, 307 transitions, 3824 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:06:06,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 333 transitions, 4706 flow [2024-06-21 22:06:07,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 333 transitions, 4443 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:07,509 INFO L231 Difference]: Finished difference. Result has 260 places, 307 transitions, 3831 flow [2024-06-21 22:06:07,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=260, PETRI_TRANSITIONS=307} [2024-06-21 22:06:07,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 22:06:07,510 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 307 transitions, 3831 flow [2024-06-21 22:06:07,510 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) [2024-06-21 22:06:07,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:07,510 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] [2024-06-21 22:06:07,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:06:07,510 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)] === [2024-06-21 22:06:07,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash 285038016, now seen corresponding path program 5 times [2024-06-21 22:06:07,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:07,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073126918] [2024-06-21 22:06:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:07,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:10,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:10,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073126918] [2024-06-21 22:06:10,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073126918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:10,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:10,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:10,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021214246] [2024-06-21 22:06:10,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:10,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:10,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:10,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:10,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:10,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:10,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 307 transitions, 3831 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) [2024-06-21 22:06:10,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:10,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:10,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:12,304 INFO L124 PetriNetUnfolderBase]: 3255/5332 cut-off events. [2024-06-21 22:06:12,305 INFO L125 PetriNetUnfolderBase]: For 282346/282346 co-relation queries the response was YES. [2024-06-21 22:06:12,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31133 conditions, 5332 events. 3255/5332 cut-off events. For 282346/282346 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33261 event pairs, 877 based on Foata normal form. 4/5331 useless extension candidates. Maximal degree in co-relation 31010. Up to 4582 conditions per place. [2024-06-21 22:06:12,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 86 changer transitions 0/335 dead transitions. [2024-06-21 22:06:12,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 335 transitions, 4746 flow [2024-06-21 22:06:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 22:06:12,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 22:06:12,353 INFO L175 Difference]: Start difference. First operand has 260 places, 307 transitions, 3831 flow. Second operand 10 states and 165 transitions. [2024-06-21 22:06:12,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 335 transitions, 4746 flow [2024-06-21 22:06:13,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 335 transitions, 4329 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:13,070 INFO L231 Difference]: Finished difference. Result has 261 places, 310 transitions, 3631 flow [2024-06-21 22:06:13,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3631, PETRI_PLACES=261, PETRI_TRANSITIONS=310} [2024-06-21 22:06:13,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 22:06:13,071 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 310 transitions, 3631 flow [2024-06-21 22:06:13,071 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) [2024-06-21 22:06:13,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:13,071 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] [2024-06-21 22:06:13,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:06:13,071 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)] === [2024-06-21 22:06:13,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1084568550, now seen corresponding path program 6 times [2024-06-21 22:06:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:13,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323860202] [2024-06-21 22:06:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:16,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323860202] [2024-06-21 22:06:16,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323860202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:16,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:16,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582937222] [2024-06-21 22:06:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:16,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:16,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:16,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 310 transitions, 3631 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) [2024-06-21 22:06:16,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:16,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:16,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:18,209 INFO L124 PetriNetUnfolderBase]: 3275/5356 cut-off events. [2024-06-21 22:06:18,210 INFO L125 PetriNetUnfolderBase]: For 286531/286531 co-relation queries the response was YES. [2024-06-21 22:06:18,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30874 conditions, 5356 events. 3275/5356 cut-off events. For 286531/286531 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33460 event pairs, 867 based on Foata normal form. 4/5355 useless extension candidates. Maximal degree in co-relation 30750. Up to 4598 conditions per place. [2024-06-21 22:06:18,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 81 changer transitions 0/333 dead transitions. [2024-06-21 22:06:18,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 333 transitions, 4531 flow [2024-06-21 22:06:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:06:18,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:06:18,269 INFO L175 Difference]: Start difference. First operand has 261 places, 310 transitions, 3631 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:06:18,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 333 transitions, 4531 flow [2024-06-21 22:06:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 333 transitions, 4265 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:19,070 INFO L231 Difference]: Finished difference. Result has 260 places, 313 transitions, 3571 flow [2024-06-21 22:06:19,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3571, PETRI_PLACES=260, PETRI_TRANSITIONS=313} [2024-06-21 22:06:19,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 22:06:19,071 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 313 transitions, 3571 flow [2024-06-21 22:06:19,071 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) [2024-06-21 22:06:19,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:19,071 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] [2024-06-21 22:06:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:06:19,071 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)] === [2024-06-21 22:06:19,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 888976520, now seen corresponding path program 7 times [2024-06-21 22:06:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246761751] [2024-06-21 22:06:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:21,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:21,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246761751] [2024-06-21 22:06:21,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246761751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:21,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:21,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935714314] [2024-06-21 22:06:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:21,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:21,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 313 transitions, 3571 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) [2024-06-21 22:06:21,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:21,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:21,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:23,400 INFO L124 PetriNetUnfolderBase]: 3263/5336 cut-off events. [2024-06-21 22:06:23,400 INFO L125 PetriNetUnfolderBase]: For 279354/279354 co-relation queries the response was YES. [2024-06-21 22:06:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30460 conditions, 5336 events. 3263/5336 cut-off events. For 279354/279354 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33283 event pairs, 883 based on Foata normal form. 4/5335 useless extension candidates. Maximal degree in co-relation 30336. Up to 4590 conditions per place. [2024-06-21 22:06:23,456 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 82 changer transitions 0/332 dead transitions. [2024-06-21 22:06:23,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 332 transitions, 4275 flow [2024-06-21 22:06:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:06:23,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:06:23,457 INFO L175 Difference]: Start difference. First operand has 260 places, 313 transitions, 3571 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:06:23,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 332 transitions, 4275 flow [2024-06-21 22:06:24,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 332 transitions, 4062 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:24,322 INFO L231 Difference]: Finished difference. Result has 262 places, 313 transitions, 3528 flow [2024-06-21 22:06:24,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3528, PETRI_PLACES=262, PETRI_TRANSITIONS=313} [2024-06-21 22:06:24,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 22:06:24,322 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 313 transitions, 3528 flow [2024-06-21 22:06:24,322 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) [2024-06-21 22:06:24,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:24,322 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] [2024-06-21 22:06:24,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:06:24,322 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)] === [2024-06-21 22:06:24,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:24,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1174359908, now seen corresponding path program 1 times [2024-06-21 22:06:24,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:24,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904245537] [2024-06-21 22:06:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:24,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:27,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904245537] [2024-06-21 22:06:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904245537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:27,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946284378] [2024-06-21 22:06:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:27,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:27,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 313 transitions, 3528 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) [2024-06-21 22:06:27,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:27,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:27,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:28,901 INFO L124 PetriNetUnfolderBase]: 3245/5306 cut-off events. [2024-06-21 22:06:28,902 INFO L125 PetriNetUnfolderBase]: For 272714/272714 co-relation queries the response was YES. [2024-06-21 22:06:28,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29605 conditions, 5306 events. 3245/5306 cut-off events. For 272714/272714 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33152 event pairs, 793 based on Foata normal form. 8/5309 useless extension candidates. Maximal degree in co-relation 29480. Up to 4510 conditions per place. [2024-06-21 22:06:28,956 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 288 selfloop transitions, 48 changer transitions 0/341 dead transitions. [2024-06-21 22:06:28,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 341 transitions, 4476 flow [2024-06-21 22:06:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:06:28,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 22:06:28,957 INFO L175 Difference]: Start difference. First operand has 262 places, 313 transitions, 3528 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:06:28,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 341 transitions, 4476 flow [2024-06-21 22:06:29,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 341 transitions, 4274 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:29,686 INFO L231 Difference]: Finished difference. Result has 261 places, 313 transitions, 3426 flow [2024-06-21 22:06:29,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3426, PETRI_PLACES=261, PETRI_TRANSITIONS=313} [2024-06-21 22:06:29,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 22:06:29,686 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 313 transitions, 3426 flow [2024-06-21 22:06:29,687 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) [2024-06-21 22:06:29,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:29,687 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] [2024-06-21 22:06:29,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:06:29,687 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)] === [2024-06-21 22:06:29,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash 368154048, now seen corresponding path program 2 times [2024-06-21 22:06:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:29,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431385347] [2024-06-21 22:06:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:29,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:32,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:32,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431385347] [2024-06-21 22:06:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431385347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:32,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:32,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133716044] [2024-06-21 22:06:32,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:32,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:32,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:32,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:32,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:32,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:32,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 313 transitions, 3426 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) [2024-06-21 22:06:32,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:32,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:32,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:34,597 INFO L124 PetriNetUnfolderBase]: 3227/5280 cut-off events. [2024-06-21 22:06:34,597 INFO L125 PetriNetUnfolderBase]: For 251992/251992 co-relation queries the response was YES. [2024-06-21 22:06:34,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28762 conditions, 5280 events. 3227/5280 cut-off events. For 251992/251992 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32972 event pairs, 873 based on Foata normal form. 8/5283 useless extension candidates. Maximal degree in co-relation 28636. Up to 4630 conditions per place. [2024-06-21 22:06:34,644 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 277 selfloop transitions, 53 changer transitions 0/335 dead transitions. [2024-06-21 22:06:34,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 335 transitions, 4180 flow [2024-06-21 22:06:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:06:34,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:06:34,645 INFO L175 Difference]: Start difference. First operand has 261 places, 313 transitions, 3426 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:06:34,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 335 transitions, 4180 flow [2024-06-21 22:06:35,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 335 transitions, 4034 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:35,380 INFO L231 Difference]: Finished difference. Result has 262 places, 313 transitions, 3392 flow [2024-06-21 22:06:35,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3392, PETRI_PLACES=262, PETRI_TRANSITIONS=313} [2024-06-21 22:06:35,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 22:06:35,380 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 313 transitions, 3392 flow [2024-06-21 22:06:35,381 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) [2024-06-21 22:06:35,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:35,381 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] [2024-06-21 22:06:35,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:06:35,382 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)] === [2024-06-21 22:06:35,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -598595460, now seen corresponding path program 1 times [2024-06-21 22:06:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:35,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783410270] [2024-06-21 22:06:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:35,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:38,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:38,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783410270] [2024-06-21 22:06:38,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783410270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:38,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:38,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:38,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896394478] [2024-06-21 22:06:38,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:38,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:38,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:38,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:38,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:38,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 313 transitions, 3392 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) [2024-06-21 22:06:38,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:38,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:38,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:40,510 INFO L124 PetriNetUnfolderBase]: 3407/5556 cut-off events. [2024-06-21 22:06:40,510 INFO L125 PetriNetUnfolderBase]: For 416570/416570 co-relation queries the response was YES. [2024-06-21 22:06:40,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29646 conditions, 5556 events. 3407/5556 cut-off events. For 416570/416570 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34573 event pairs, 843 based on Foata normal form. 56/5607 useless extension candidates. Maximal degree in co-relation 29520. Up to 4508 conditions per place. [2024-06-21 22:06:40,564 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 265 selfloop transitions, 78 changer transitions 5/353 dead transitions. [2024-06-21 22:06:40,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 353 transitions, 4307 flow [2024-06-21 22:06:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 22:06:40,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 22:06:40,565 INFO L175 Difference]: Start difference. First operand has 262 places, 313 transitions, 3392 flow. Second operand 10 states and 174 transitions. [2024-06-21 22:06:40,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 353 transitions, 4307 flow [2024-06-21 22:06:41,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 353 transitions, 4176 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:41,543 INFO L231 Difference]: Finished difference. Result has 267 places, 316 transitions, 3494 flow [2024-06-21 22:06:41,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3494, PETRI_PLACES=267, PETRI_TRANSITIONS=316} [2024-06-21 22:06:41,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 22:06:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 316 transitions, 3494 flow [2024-06-21 22:06:41,543 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) [2024-06-21 22:06:41,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:41,543 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] [2024-06-21 22:06:41,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:06:41,544 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)] === [2024-06-21 22:06:41,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1718760382, now seen corresponding path program 2 times [2024-06-21 22:06:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:41,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75165337] [2024-06-21 22:06:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:41,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75165337] [2024-06-21 22:06:44,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75165337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:44,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:44,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171638788] [2024-06-21 22:06:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:44,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:44,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:44,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:44,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 316 transitions, 3494 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) [2024-06-21 22:06:44,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:44,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:44,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:46,353 INFO L124 PetriNetUnfolderBase]: 3603/5872 cut-off events. [2024-06-21 22:06:46,354 INFO L125 PetriNetUnfolderBase]: For 401654/401654 co-relation queries the response was YES. [2024-06-21 22:06:46,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34488 conditions, 5872 events. 3603/5872 cut-off events. For 401654/401654 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36464 event pairs, 1021 based on Foata normal form. 8/5875 useless extension candidates. Maximal degree in co-relation 34360. Up to 3858 conditions per place. [2024-06-21 22:06:46,423 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 81 changer transitions 0/354 dead transitions. [2024-06-21 22:06:46,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 354 transitions, 4716 flow [2024-06-21 22:06:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:06:46,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:06:46,425 INFO L175 Difference]: Start difference. First operand has 267 places, 316 transitions, 3494 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:06:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 354 transitions, 4716 flow [2024-06-21 22:06:47,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 354 transitions, 4588 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:47,431 INFO L231 Difference]: Finished difference. Result has 271 places, 318 transitions, 3570 flow [2024-06-21 22:06:47,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3570, PETRI_PLACES=271, PETRI_TRANSITIONS=318} [2024-06-21 22:06:47,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 22:06:47,432 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 318 transitions, 3570 flow [2024-06-21 22:06:47,432 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) [2024-06-21 22:06:47,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:47,432 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] [2024-06-21 22:06:47,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:06:47,432 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)] === [2024-06-21 22:06:47,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash -545140622, now seen corresponding path program 3 times [2024-06-21 22:06:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:47,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899484087] [2024-06-21 22:06:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:47,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899484087] [2024-06-21 22:06:50,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899484087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:50,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:50,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:50,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400351689] [2024-06-21 22:06:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:50,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:50,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 318 transitions, 3570 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) [2024-06-21 22:06:50,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:50,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:50,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:52,524 INFO L124 PetriNetUnfolderBase]: 3585/5836 cut-off events. [2024-06-21 22:06:52,525 INFO L125 PetriNetUnfolderBase]: For 383130/383130 co-relation queries the response was YES. [2024-06-21 22:06:52,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34137 conditions, 5836 events. 3585/5836 cut-off events. For 383130/383130 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36077 event pairs, 817 based on Foata normal form. 8/5839 useless extension candidates. Maximal degree in co-relation 34006. Up to 3850 conditions per place. [2024-06-21 22:06:52,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 82 changer transitions 0/355 dead transitions. [2024-06-21 22:06:52,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 355 transitions, 4625 flow [2024-06-21 22:06:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:06:52,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:06:52,590 INFO L175 Difference]: Start difference. First operand has 271 places, 318 transitions, 3570 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:06:52,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 355 transitions, 4625 flow [2024-06-21 22:06:53,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 355 transitions, 4347 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:53,494 INFO L231 Difference]: Finished difference. Result has 272 places, 319 transitions, 3481 flow [2024-06-21 22:06:53,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3481, PETRI_PLACES=272, PETRI_TRANSITIONS=319} [2024-06-21 22:06:53,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 22:06:53,495 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 319 transitions, 3481 flow [2024-06-21 22:06:53,495 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) [2024-06-21 22:06:53,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:53,495 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, 1] [2024-06-21 22:06:53,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:06:53,495 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)] === [2024-06-21 22:06:53,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1960140792, now seen corresponding path program 1 times [2024-06-21 22:06:53,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:53,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929625698] [2024-06-21 22:06:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:53,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:56,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:56,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929625698] [2024-06-21 22:06:56,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929625698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:56,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:56,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809171081] [2024-06-21 22:06:56,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:56,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:56,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:56,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 319 transitions, 3481 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) [2024-06-21 22:06:56,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:56,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:56,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:58,802 INFO L124 PetriNetUnfolderBase]: 3718/6107 cut-off events. [2024-06-21 22:06:58,802 INFO L125 PetriNetUnfolderBase]: For 455990/455990 co-relation queries the response was YES. [2024-06-21 22:06:58,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36444 conditions, 6107 events. 3718/6107 cut-off events. For 455990/455990 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38676 event pairs, 886 based on Foata normal form. 8/6114 useless extension candidates. Maximal degree in co-relation 36314. Up to 4400 conditions per place. [2024-06-21 22:06:58,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 71 changer transitions 7/387 dead transitions. [2024-06-21 22:06:58,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 387 transitions, 4925 flow [2024-06-21 22:06:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 22:06:58,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 22:06:58,864 INFO L175 Difference]: Start difference. First operand has 272 places, 319 transitions, 3481 flow. Second operand 10 states and 198 transitions. [2024-06-21 22:06:58,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 387 transitions, 4925 flow [2024-06-21 22:07:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 387 transitions, 4799 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:00,138 INFO L231 Difference]: Finished difference. Result has 276 places, 322 transitions, 3576 flow [2024-06-21 22:07:00,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3576, PETRI_PLACES=276, PETRI_TRANSITIONS=322} [2024-06-21 22:07:00,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 22:07:00,139 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 322 transitions, 3576 flow [2024-06-21 22:07:00,139 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) [2024-06-21 22:07:00,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:00,139 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, 1] [2024-06-21 22:07:00,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:07:00,139 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)] === [2024-06-21 22:07:00,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1054691154, now seen corresponding path program 2 times [2024-06-21 22:07:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:00,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953767363] [2024-06-21 22:07:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:04,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:04,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953767363] [2024-06-21 22:07:04,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953767363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:04,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:04,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166946247] [2024-06-21 22:07:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:04,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:04,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:04,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 322 transitions, 3576 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) [2024-06-21 22:07:04,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:04,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:04,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:06,170 INFO L124 PetriNetUnfolderBase]: 3540/5829 cut-off events. [2024-06-21 22:07:06,171 INFO L125 PetriNetUnfolderBase]: For 319065/319065 co-relation queries the response was YES. [2024-06-21 22:07:06,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32195 conditions, 5829 events. 3540/5829 cut-off events. For 319065/319065 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37017 event pairs, 929 based on Foata normal form. 8/5836 useless extension candidates. Maximal degree in co-relation 32064. Up to 5149 conditions per place. [2024-06-21 22:07:06,234 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 61 changer transitions 4/366 dead transitions. [2024-06-21 22:07:06,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 366 transitions, 4478 flow [2024-06-21 22:07:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:07:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:07:06,235 INFO L175 Difference]: Start difference. First operand has 276 places, 322 transitions, 3576 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:07:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 366 transitions, 4478 flow [2024-06-21 22:07:07,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 366 transitions, 4355 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:07,531 INFO L231 Difference]: Finished difference. Result has 280 places, 323 transitions, 3607 flow [2024-06-21 22:07:07,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3463, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3607, PETRI_PLACES=280, PETRI_TRANSITIONS=323} [2024-06-21 22:07:07,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 22:07:07,532 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 323 transitions, 3607 flow [2024-06-21 22:07:07,532 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) [2024-06-21 22:07:07,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:07,532 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, 1] [2024-06-21 22:07:07,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:07:07,532 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)] === [2024-06-21 22:07:07,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash -189200916, now seen corresponding path program 3 times [2024-06-21 22:07:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:07,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202784956] [2024-06-21 22:07:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:10,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202784956] [2024-06-21 22:07:10,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202784956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:10,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:10,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:10,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362862424] [2024-06-21 22:07:10,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:10,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:10,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 323 transitions, 3607 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) [2024-06-21 22:07:10,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:10,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:12,438 INFO L124 PetriNetUnfolderBase]: 3576/5883 cut-off events. [2024-06-21 22:07:12,439 INFO L125 PetriNetUnfolderBase]: For 333041/333041 co-relation queries the response was YES. [2024-06-21 22:07:12,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32355 conditions, 5883 events. 3576/5883 cut-off events. For 333041/333041 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37546 event pairs, 1026 based on Foata normal form. 10/5892 useless extension candidates. Maximal degree in co-relation 32222. Up to 4888 conditions per place. [2024-06-21 22:07:12,506 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 59 changer transitions 1/374 dead transitions. [2024-06-21 22:07:12,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 374 transitions, 4749 flow [2024-06-21 22:07:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 22:07:12,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 22:07:12,507 INFO L175 Difference]: Start difference. First operand has 280 places, 323 transitions, 3607 flow. Second operand 9 states and 172 transitions. [2024-06-21 22:07:12,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 374 transitions, 4749 flow [2024-06-21 22:07:13,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 374 transitions, 4623 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:13,765 INFO L231 Difference]: Finished difference. Result has 282 places, 324 transitions, 3622 flow [2024-06-21 22:07:13,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3622, PETRI_PLACES=282, PETRI_TRANSITIONS=324} [2024-06-21 22:07:13,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 22:07:13,765 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 324 transitions, 3622 flow [2024-06-21 22:07:13,765 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) [2024-06-21 22:07:13,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:13,765 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, 1] [2024-06-21 22:07:13,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:07:13,766 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)] === [2024-06-21 22:07:13,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -181582356, now seen corresponding path program 4 times [2024-06-21 22:07:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846174117] [2024-06-21 22:07:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:17,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:17,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846174117] [2024-06-21 22:07:17,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846174117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:17,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:17,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184623502] [2024-06-21 22:07:17,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:17,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:17,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:17,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:17,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 324 transitions, 3622 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) [2024-06-21 22:07:17,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:17,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:17,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:19,601 INFO L124 PetriNetUnfolderBase]: 3553/5856 cut-off events. [2024-06-21 22:07:19,601 INFO L125 PetriNetUnfolderBase]: For 304898/304898 co-relation queries the response was YES. [2024-06-21 22:07:19,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 5856 events. 3553/5856 cut-off events. For 304898/304898 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37520 event pairs, 1097 based on Foata normal form. 10/5865 useless extension candidates. Maximal degree in co-relation 31252. Up to 5246 conditions per place. [2024-06-21 22:07:19,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 58 changer transitions 1/365 dead transitions. [2024-06-21 22:07:19,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 365 transitions, 4498 flow [2024-06-21 22:07:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:07:19,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:07:19,667 INFO L175 Difference]: Start difference. First operand has 282 places, 324 transitions, 3622 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:07:19,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 365 transitions, 4498 flow [2024-06-21 22:07:20,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 365 transitions, 4317 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 22:07:20,833 INFO L231 Difference]: Finished difference. Result has 283 places, 324 transitions, 3562 flow [2024-06-21 22:07:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3562, PETRI_PLACES=283, PETRI_TRANSITIONS=324} [2024-06-21 22:07:20,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 22:07:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 324 transitions, 3562 flow [2024-06-21 22:07:20,834 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) [2024-06-21 22:07:20,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:20,834 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, 1] [2024-06-21 22:07:20,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:07:20,834 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)] === [2024-06-21 22:07:20,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 96490988, now seen corresponding path program 5 times [2024-06-21 22:07:20,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162023228] [2024-06-21 22:07:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:24,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:24,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162023228] [2024-06-21 22:07:24,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162023228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:24,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:24,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:24,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790678734] [2024-06-21 22:07:24,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:24,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:24,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:24,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:24,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 324 transitions, 3562 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) [2024-06-21 22:07:24,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:24,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:24,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:26,262 INFO L124 PetriNetUnfolderBase]: 3581/5894 cut-off events. [2024-06-21 22:07:26,262 INFO L125 PetriNetUnfolderBase]: For 302337/302337 co-relation queries the response was YES. [2024-06-21 22:07:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31338 conditions, 5894 events. 3581/5894 cut-off events. For 302337/302337 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37690 event pairs, 1123 based on Foata normal form. 8/5901 useless extension candidates. Maximal degree in co-relation 31204. Up to 5360 conditions per place. [2024-06-21 22:07:26,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 56 changer transitions 1/360 dead transitions. [2024-06-21 22:07:26,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 360 transitions, 4412 flow [2024-06-21 22:07:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:07:26,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 22:07:26,317 INFO L175 Difference]: Start difference. First operand has 283 places, 324 transitions, 3562 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:07:26,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 360 transitions, 4412 flow [2024-06-21 22:07:27,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 360 transitions, 4290 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:07:27,580 INFO L231 Difference]: Finished difference. Result has 284 places, 325 transitions, 3576 flow [2024-06-21 22:07:27,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3576, PETRI_PLACES=284, PETRI_TRANSITIONS=325} [2024-06-21 22:07:27,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 22:07:27,581 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 325 transitions, 3576 flow [2024-06-21 22:07:27,581 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) [2024-06-21 22:07:27,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:27,581 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, 1] [2024-06-21 22:07:27,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:07:27,581 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)] === [2024-06-21 22:07:27,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:27,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1440323226, now seen corresponding path program 6 times [2024-06-21 22:07:27,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:27,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387341862] [2024-06-21 22:07:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:27,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:31,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387341862] [2024-06-21 22:07:31,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387341862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:31,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:31,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:31,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111150187] [2024-06-21 22:07:31,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:31,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:31,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:31,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:31,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:31,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 325 transitions, 3576 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) [2024-06-21 22:07:31,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:31,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:31,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:33,327 INFO L124 PetriNetUnfolderBase]: 3908/6415 cut-off events. [2024-06-21 22:07:33,327 INFO L125 PetriNetUnfolderBase]: For 534995/534997 co-relation queries the response was YES. [2024-06-21 22:07:33,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38491 conditions, 6415 events. 3908/6415 cut-off events. For 534995/534997 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41000 event pairs, 968 based on Foata normal form. 12/6426 useless extension candidates. Maximal degree in co-relation 38356. Up to 4362 conditions per place. [2024-06-21 22:07:33,399 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 159 changer transitions 0/382 dead transitions. [2024-06-21 22:07:33,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 382 transitions, 4789 flow [2024-06-21 22:07:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 22:07:33,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-21 22:07:33,400 INFO L175 Difference]: Start difference. First operand has 284 places, 325 transitions, 3576 flow. Second operand 9 states and 184 transitions. [2024-06-21 22:07:33,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 382 transitions, 4789 flow [2024-06-21 22:07:34,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 382 transitions, 4671 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:34,626 INFO L231 Difference]: Finished difference. Result has 286 places, 327 transitions, 3830 flow [2024-06-21 22:07:34,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3830, PETRI_PLACES=286, PETRI_TRANSITIONS=327} [2024-06-21 22:07:34,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 22:07:34,627 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 327 transitions, 3830 flow [2024-06-21 22:07:34,627 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) [2024-06-21 22:07:34,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:34,627 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, 1] [2024-06-21 22:07:34,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:07:34,627 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)] === [2024-06-21 22:07:34,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -790499860, now seen corresponding path program 7 times [2024-06-21 22:07:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:34,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264115811] [2024-06-21 22:07:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:34,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:38,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264115811] [2024-06-21 22:07:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264115811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:38,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:38,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675660839] [2024-06-21 22:07:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:38,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:38,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:38,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 327 transitions, 3830 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) [2024-06-21 22:07:38,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:38,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:38,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:40,499 INFO L124 PetriNetUnfolderBase]: 3944/6471 cut-off events. [2024-06-21 22:07:40,499 INFO L125 PetriNetUnfolderBase]: For 552100/552102 co-relation queries the response was YES. [2024-06-21 22:07:40,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39622 conditions, 6471 events. 3944/6471 cut-off events. For 552100/552102 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 41489 event pairs, 990 based on Foata normal form. 12/6482 useless extension candidates. Maximal degree in co-relation 39486. Up to 5041 conditions per place. [2024-06-21 22:07:40,575 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 158 changer transitions 0/371 dead transitions. [2024-06-21 22:07:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 371 transitions, 4751 flow [2024-06-21 22:07:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 22:07:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 22:07:40,576 INFO L175 Difference]: Start difference. First operand has 286 places, 327 transitions, 3830 flow. Second operand 9 states and 173 transitions. [2024-06-21 22:07:40,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 371 transitions, 4751 flow [2024-06-21 22:07:42,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 371 transitions, 4499 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:42,222 INFO L231 Difference]: Finished difference. Result has 290 places, 328 transitions, 3927 flow [2024-06-21 22:07:42,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3927, PETRI_PLACES=290, PETRI_TRANSITIONS=328} [2024-06-21 22:07:42,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 22:07:42,223 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 328 transitions, 3927 flow [2024-06-21 22:07:42,223 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) [2024-06-21 22:07:42,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:42,223 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, 1] [2024-06-21 22:07:42,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:07:42,223 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)] === [2024-06-21 22:07:42,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2019747080, now seen corresponding path program 8 times [2024-06-21 22:07:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:42,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571475534] [2024-06-21 22:07:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571475534] [2024-06-21 22:07:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571475534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:45,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:45,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60699890] [2024-06-21 22:07:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:45,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:45,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 328 transitions, 3927 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) [2024-06-21 22:07:45,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:45,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:47,652 INFO L124 PetriNetUnfolderBase]: 3980/6527 cut-off events. [2024-06-21 22:07:47,652 INFO L125 PetriNetUnfolderBase]: For 561422/561424 co-relation queries the response was YES. [2024-06-21 22:07:47,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40212 conditions, 6527 events. 3980/6527 cut-off events. For 561422/561424 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 41934 event pairs, 996 based on Foata normal form. 12/6538 useless extension candidates. Maximal degree in co-relation 40074. Up to 5097 conditions per place. [2024-06-21 22:07:47,723 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 155 changer transitions 0/367 dead transitions. [2024-06-21 22:07:47,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 367 transitions, 4812 flow [2024-06-21 22:07:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 22:07:47,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 22:07:47,724 INFO L175 Difference]: Start difference. First operand has 290 places, 328 transitions, 3927 flow. Second operand 9 states and 167 transitions. [2024-06-21 22:07:47,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 367 transitions, 4812 flow [2024-06-21 22:07:49,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 367 transitions, 4493 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:49,159 INFO L231 Difference]: Finished difference. Result has 292 places, 329 transitions, 3943 flow [2024-06-21 22:07:49,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3943, PETRI_PLACES=292, PETRI_TRANSITIONS=329} [2024-06-21 22:07:49,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 22:07:49,160 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 329 transitions, 3943 flow [2024-06-21 22:07:49,160 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) [2024-06-21 22:07:49,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:49,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:49,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:07:49,160 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)] === [2024-06-21 22:07:49,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:49,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1400884890, now seen corresponding path program 9 times [2024-06-21 22:07:49,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:49,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258247405] [2024-06-21 22:07:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:49,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258247405] [2024-06-21 22:07:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258247405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:52,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:52,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:52,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521731097] [2024-06-21 22:07:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:52,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:52,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:52,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:52,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:52,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 329 transitions, 3943 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) [2024-06-21 22:07:52,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:52,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:52,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:54,571 INFO L124 PetriNetUnfolderBase]: 4016/6565 cut-off events. [2024-06-21 22:07:54,571 INFO L125 PetriNetUnfolderBase]: For 574730/574730 co-relation queries the response was YES. [2024-06-21 22:07:54,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40615 conditions, 6565 events. 4016/6565 cut-off events. For 574730/574730 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42170 event pairs, 1264 based on Foata normal form. 10/6574 useless extension candidates. Maximal degree in co-relation 40476. Up to 6003 conditions per place. [2024-06-21 22:07:54,648 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 293 selfloop transitions, 61 changer transitions 0/359 dead transitions. [2024-06-21 22:07:54,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 359 transitions, 4781 flow [2024-06-21 22:07:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:07:54,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:07:54,650 INFO L175 Difference]: Start difference. First operand has 292 places, 329 transitions, 3943 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:07:54,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 359 transitions, 4781 flow [2024-06-21 22:07:56,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 359 transitions, 4466 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:56,122 INFO L231 Difference]: Finished difference. Result has 294 places, 330 transitions, 3777 flow [2024-06-21 22:07:56,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3777, PETRI_PLACES=294, PETRI_TRANSITIONS=330} [2024-06-21 22:07:56,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 22:07:56,123 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 330 transitions, 3777 flow [2024-06-21 22:07:56,123 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) [2024-06-21 22:07:56,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:56,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:56,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:07:56,123 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)] === [2024-06-21 22:07:56,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1382515448, now seen corresponding path program 10 times [2024-06-21 22:07:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758237417] [2024-06-21 22:07:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:59,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:59,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758237417] [2024-06-21 22:07:59,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758237417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:59,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:59,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174358558] [2024-06-21 22:07:59,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:59,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:59,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:59,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:59,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 330 transitions, 3777 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) [2024-06-21 22:07:59,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:59,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:59,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:01,368 INFO L124 PetriNetUnfolderBase]: 3998/6539 cut-off events. [2024-06-21 22:08:01,368 INFO L125 PetriNetUnfolderBase]: For 541169/541169 co-relation queries the response was YES. [2024-06-21 22:08:01,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39294 conditions, 6539 events. 3998/6539 cut-off events. For 541169/541169 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41963 event pairs, 1272 based on Foata normal form. 8/6546 useless extension candidates. Maximal degree in co-relation 39154. Up to 6011 conditions per place. [2024-06-21 22:08:01,446 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 54 changer transitions 0/357 dead transitions. [2024-06-21 22:08:01,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 357 transitions, 4575 flow [2024-06-21 22:08:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:08:01,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 22:08:01,447 INFO L175 Difference]: Start difference. First operand has 294 places, 330 transitions, 3777 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:08:01,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 357 transitions, 4575 flow [2024-06-21 22:08:03,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 357 transitions, 4442 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:03,471 INFO L231 Difference]: Finished difference. Result has 296 places, 330 transitions, 3756 flow [2024-06-21 22:08:03,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3756, PETRI_PLACES=296, PETRI_TRANSITIONS=330} [2024-06-21 22:08:03,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 22:08:03,472 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 330 transitions, 3756 flow [2024-06-21 22:08:03,472 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) [2024-06-21 22:08:03,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:03,472 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, 1] [2024-06-21 22:08:03,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:08:03,472 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)] === [2024-06-21 22:08:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -473170344, now seen corresponding path program 1 times [2024-06-21 22:08:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370250049] [2024-06-21 22:08:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:07,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:07,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370250049] [2024-06-21 22:08:07,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370250049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:07,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:07,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:07,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939455679] [2024-06-21 22:08:07,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:07,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:07,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:07,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:07,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:07,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:07,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 330 transitions, 3756 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) [2024-06-21 22:08:07,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:07,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:07,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:09,565 INFO L124 PetriNetUnfolderBase]: 4231/6950 cut-off events. [2024-06-21 22:08:09,565 INFO L125 PetriNetUnfolderBase]: For 728826/728828 co-relation queries the response was YES. [2024-06-21 22:08:09,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44869 conditions, 6950 events. 4231/6950 cut-off events. For 728826/728828 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 44904 event pairs, 1010 based on Foata normal form. 8/6957 useless extension candidates. Maximal degree in co-relation 44728. Up to 3756 conditions per place. [2024-06-21 22:08:09,649 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 163 changer transitions 0/392 dead transitions. [2024-06-21 22:08:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 392 transitions, 5221 flow [2024-06-21 22:08:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 22:08:09,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-21 22:08:09,650 INFO L175 Difference]: Start difference. First operand has 296 places, 330 transitions, 3756 flow. Second operand 9 states and 187 transitions. [2024-06-21 22:08:09,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 392 transitions, 5221 flow [2024-06-21 22:08:12,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 392 transitions, 5109 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:12,201 INFO L231 Difference]: Finished difference. Result has 298 places, 332 transitions, 4028 flow [2024-06-21 22:08:12,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4028, PETRI_PLACES=298, PETRI_TRANSITIONS=332} [2024-06-21 22:08:12,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 22:08:12,202 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 332 transitions, 4028 flow [2024-06-21 22:08:12,202 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) [2024-06-21 22:08:12,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:12,202 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, 1] [2024-06-21 22:08:12,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 22:08:12,203 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)] === [2024-06-21 22:08:12,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash -463647144, now seen corresponding path program 2 times [2024-06-21 22:08:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:12,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093083310] [2024-06-21 22:08:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:12,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093083310] [2024-06-21 22:08:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093083310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:15,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258606585] [2024-06-21 22:08:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:15,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:15,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:15,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 332 transitions, 4028 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) [2024-06-21 22:08:15,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:15,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:15,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:18,114 INFO L124 PetriNetUnfolderBase]: 4251/6978 cut-off events. [2024-06-21 22:08:18,114 INFO L125 PetriNetUnfolderBase]: For 749473/749475 co-relation queries the response was YES. [2024-06-21 22:08:18,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46006 conditions, 6978 events. 4251/6978 cut-off events. For 749473/749475 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45190 event pairs, 1089 based on Foata normal form. 8/6985 useless extension candidates. Maximal degree in co-relation 45864. Up to 3768 conditions per place. [2024-06-21 22:08:18,191 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 216 selfloop transitions, 164 changer transitions 0/385 dead transitions. [2024-06-21 22:08:18,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 385 transitions, 5235 flow [2024-06-21 22:08:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 22:08:18,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 22:08:18,192 INFO L175 Difference]: Start difference. First operand has 298 places, 332 transitions, 4028 flow. Second operand 9 states and 179 transitions. [2024-06-21 22:08:18,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 385 transitions, 5235 flow [2024-06-21 22:08:20,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 385 transitions, 4861 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:20,371 INFO L231 Difference]: Finished difference. Result has 301 places, 333 transitions, 4014 flow [2024-06-21 22:08:20,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4014, PETRI_PLACES=301, PETRI_TRANSITIONS=333} [2024-06-21 22:08:20,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 22:08:20,371 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 333 transitions, 4014 flow [2024-06-21 22:08:20,371 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) [2024-06-21 22:08:20,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:20,371 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, 1] [2024-06-21 22:08:20,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 22:08:20,371 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)] === [2024-06-21 22:08:20,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1370144246, now seen corresponding path program 3 times [2024-06-21 22:08:20,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:20,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733248935] [2024-06-21 22:08:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:24,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733248935] [2024-06-21 22:08:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733248935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:24,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:24,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052661363] [2024-06-21 22:08:24,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:24,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:24,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:24,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:24,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 333 transitions, 4014 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) [2024-06-21 22:08:24,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:24,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:24,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:26,387 INFO L124 PetriNetUnfolderBase]: 4271/7022 cut-off events. [2024-06-21 22:08:26,387 INFO L125 PetriNetUnfolderBase]: For 760856/760858 co-relation queries the response was YES. [2024-06-21 22:08:26,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46127 conditions, 7022 events. 4271/7022 cut-off events. For 760856/760858 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45817 event pairs, 1135 based on Foata normal form. 8/7029 useless extension candidates. Maximal degree in co-relation 45984. Up to 5442 conditions per place. [2024-06-21 22:08:26,478 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 156 changer transitions 0/374 dead transitions. [2024-06-21 22:08:26,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 374 transitions, 4929 flow [2024-06-21 22:08:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 22:08:26,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:08:26,479 INFO L175 Difference]: Start difference. First operand has 301 places, 333 transitions, 4014 flow. Second operand 9 states and 168 transitions. [2024-06-21 22:08:26,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 374 transitions, 4929 flow [2024-06-21 22:08:28,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 374 transitions, 4638 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:28,940 INFO L231 Difference]: Finished difference. Result has 304 places, 334 transitions, 4059 flow [2024-06-21 22:08:28,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4059, PETRI_PLACES=304, PETRI_TRANSITIONS=334} [2024-06-21 22:08:28,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 22:08:28,940 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 334 transitions, 4059 flow [2024-06-21 22:08:28,940 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) [2024-06-21 22:08:28,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:28,941 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, 1] [2024-06-21 22:08:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 22:08:28,941 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)] === [2024-06-21 22:08:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash 290846448, now seen corresponding path program 4 times [2024-06-21 22:08:28,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119696299] [2024-06-21 22:08:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119696299] [2024-06-21 22:08:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119696299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:32,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:32,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120526075] [2024-06-21 22:08:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:32,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:32,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:32,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 334 transitions, 4059 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) [2024-06-21 22:08:32,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:32,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:34,929 INFO L124 PetriNetUnfolderBase]: 4291/7044 cut-off events. [2024-06-21 22:08:34,930 INFO L125 PetriNetUnfolderBase]: For 777777/777777 co-relation queries the response was YES. [2024-06-21 22:08:34,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46390 conditions, 7044 events. 4291/7044 cut-off events. For 777777/777777 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45943 event pairs, 1425 based on Foata normal form. 6/7049 useless extension candidates. Maximal degree in co-relation 46246. Up to 6410 conditions per place. [2024-06-21 22:08:35,003 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 61 changer transitions 0/366 dead transitions. [2024-06-21 22:08:35,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 366 transitions, 4926 flow [2024-06-21 22:08:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:08:35,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 22:08:35,006 INFO L175 Difference]: Start difference. First operand has 304 places, 334 transitions, 4059 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:08:35,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 366 transitions, 4926 flow [2024-06-21 22:08:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 366 transitions, 4608 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:37,394 INFO L231 Difference]: Finished difference. Result has 306 places, 335 transitions, 3888 flow [2024-06-21 22:08:37,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3888, PETRI_PLACES=306, PETRI_TRANSITIONS=335} [2024-06-21 22:08:37,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 22:08:37,395 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 335 transitions, 3888 flow [2024-06-21 22:08:37,395 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) [2024-06-21 22:08:37,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:37,395 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, 1] [2024-06-21 22:08:37,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 22:08:37,395 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)] === [2024-06-21 22:08:37,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1672561622, now seen corresponding path program 11 times [2024-06-21 22:08:37,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:37,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749425175] [2024-06-21 22:08:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:40,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:40,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749425175] [2024-06-21 22:08:40,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749425175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:40,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:40,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457518182] [2024-06-21 22:08:40,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:40,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:40,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:40,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 335 transitions, 3888 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) [2024-06-21 22:08:40,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:40,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:40,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:43,293 INFO L124 PetriNetUnfolderBase]: 4592/7517 cut-off events. [2024-06-21 22:08:43,294 INFO L125 PetriNetUnfolderBase]: For 1057981/1057981 co-relation queries the response was YES. [2024-06-21 22:08:43,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52957 conditions, 7517 events. 4592/7517 cut-off events. For 1057981/1057981 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49203 event pairs, 1264 based on Foata normal form. 10/7521 useless extension candidates. Maximal degree in co-relation 52812. Up to 5426 conditions per place. [2024-06-21 22:08:43,391 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 135 changer transitions 0/387 dead transitions. [2024-06-21 22:08:43,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 387 transitions, 5113 flow [2024-06-21 22:08:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 22:08:43,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 22:08:43,392 INFO L175 Difference]: Start difference. First operand has 306 places, 335 transitions, 3888 flow. Second operand 9 states and 177 transitions. [2024-06-21 22:08:43,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 387 transitions, 5113 flow [2024-06-21 22:08:45,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 387 transitions, 4983 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:45,911 INFO L231 Difference]: Finished difference. Result has 308 places, 337 transitions, 4086 flow [2024-06-21 22:08:45,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4086, PETRI_PLACES=308, PETRI_TRANSITIONS=337} [2024-06-21 22:08:45,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 22:08:45,911 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 337 transitions, 4086 flow [2024-06-21 22:08:45,911 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) [2024-06-21 22:08:45,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:45,911 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, 1] [2024-06-21 22:08:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 22:08:45,911 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)] === [2024-06-21 22:08:45,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1089107034, now seen corresponding path program 12 times [2024-06-21 22:08:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:45,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559750950] [2024-06-21 22:08:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:49,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559750950] [2024-06-21 22:08:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559750950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:49,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:49,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:49,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516804869] [2024-06-21 22:08:49,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:49,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:49,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:49,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:49,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 337 transitions, 4086 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) [2024-06-21 22:08:49,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:49,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:49,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:52,376 INFO L124 PetriNetUnfolderBase]: 4628/7573 cut-off events. [2024-06-21 22:08:52,376 INFO L125 PetriNetUnfolderBase]: For 1084609/1084609 co-relation queries the response was YES. [2024-06-21 22:08:52,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54080 conditions, 7573 events. 4628/7573 cut-off events. For 1084609/1084609 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 49582 event pairs, 1286 based on Foata normal form. 10/7577 useless extension candidates. Maximal degree in co-relation 53934. Up to 6121 conditions per place. [2024-06-21 22:08:52,465 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 134 changer transitions 0/376 dead transitions. [2024-06-21 22:08:52,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 376 transitions, 4999 flow [2024-06-21 22:08:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:08:52,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 22:08:52,467 INFO L175 Difference]: Start difference. First operand has 308 places, 337 transitions, 4086 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:08:52,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 376 transitions, 4999 flow [2024-06-21 22:08:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 376 transitions, 4789 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:54,740 INFO L231 Difference]: Finished difference. Result has 312 places, 338 transitions, 4179 flow [2024-06-21 22:08:54,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4179, PETRI_PLACES=312, PETRI_TRANSITIONS=338} [2024-06-21 22:08:54,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 22:08:54,741 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 338 transitions, 4179 flow [2024-06-21 22:08:54,741 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) [2024-06-21 22:08:54,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:54,741 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, 1] [2024-06-21 22:08:54,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 22:08:54,741 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)] === [2024-06-21 22:08:54,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:54,742 INFO L85 PathProgramCache]: Analyzing trace with hash 979547946, now seen corresponding path program 13 times [2024-06-21 22:08:54,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:54,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754879621] [2024-06-21 22:08:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:54,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:58,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754879621] [2024-06-21 22:08:58,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754879621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:58,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:58,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248905634] [2024-06-21 22:08:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:58,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:58,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 338 transitions, 4179 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) [2024-06-21 22:08:58,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:58,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:58,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:00,543 INFO L124 PetriNetUnfolderBase]: 4664/7629 cut-off events. [2024-06-21 22:09:00,544 INFO L125 PetriNetUnfolderBase]: For 1102824/1102824 co-relation queries the response was YES. [2024-06-21 22:09:00,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54684 conditions, 7629 events. 4664/7629 cut-off events. For 1102824/1102824 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 50037 event pairs, 1288 based on Foata normal form. 10/7633 useless extension candidates. Maximal degree in co-relation 54536. Up to 6177 conditions per place. [2024-06-21 22:09:00,643 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 131 changer transitions 0/373 dead transitions. [2024-06-21 22:09:00,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 373 transitions, 5066 flow [2024-06-21 22:09:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:09:00,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:09:00,645 INFO L175 Difference]: Start difference. First operand has 312 places, 338 transitions, 4179 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:09:00,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 373 transitions, 5066 flow [2024-06-21 22:09:03,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 373 transitions, 4795 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:03,026 INFO L231 Difference]: Finished difference. Result has 314 places, 339 transitions, 4195 flow [2024-06-21 22:09:03,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3908, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4195, PETRI_PLACES=314, PETRI_TRANSITIONS=339} [2024-06-21 22:09:03,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 22:09:03,027 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 339 transitions, 4195 flow [2024-06-21 22:09:03,027 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) [2024-06-21 22:09:03,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:03,027 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, 1] [2024-06-21 22:09:03,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 22:09:03,028 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)] === [2024-06-21 22:09:03,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash -473436880, now seen corresponding path program 14 times [2024-06-21 22:09:03,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:03,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172643311] [2024-06-21 22:09:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:03,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:06,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:06,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172643311] [2024-06-21 22:09:06,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172643311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:06,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:06,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780964336] [2024-06-21 22:09:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:06,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:06,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:06,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 339 transitions, 4195 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) [2024-06-21 22:09:06,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:06,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:08,954 INFO L124 PetriNetUnfolderBase]: 4840/7893 cut-off events. [2024-06-21 22:09:08,954 INFO L125 PetriNetUnfolderBase]: For 1355074/1355074 co-relation queries the response was YES. [2024-06-21 22:09:09,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55993 conditions, 7893 events. 4840/7893 cut-off events. For 1355074/1355074 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 51965 event pairs, 1330 based on Foata normal form. 54/7941 useless extension candidates. Maximal degree in co-relation 55844. Up to 6217 conditions per place. [2024-06-21 22:09:09,056 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 126 changer transitions 5/374 dead transitions. [2024-06-21 22:09:09,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 374 transitions, 5077 flow [2024-06-21 22:09:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:09:09,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:09:09,057 INFO L175 Difference]: Start difference. First operand has 314 places, 339 transitions, 4195 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:09:09,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 374 transitions, 5077 flow [2024-06-21 22:09:11,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 374 transitions, 4810 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:11,764 INFO L231 Difference]: Finished difference. Result has 316 places, 339 transitions, 4200 flow [2024-06-21 22:09:11,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4200, PETRI_PLACES=316, PETRI_TRANSITIONS=339} [2024-06-21 22:09:11,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 22:09:11,764 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 339 transitions, 4200 flow [2024-06-21 22:09:11,764 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) [2024-06-21 22:09:11,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:11,766 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, 1] [2024-06-21 22:09:11,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 22:09:11,766 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)] === [2024-06-21 22:09:11,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:11,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2049706890, now seen corresponding path program 15 times [2024-06-21 22:09:11,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:11,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544519128] [2024-06-21 22:09:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:11,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:15,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544519128] [2024-06-21 22:09:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544519128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799682368] [2024-06-21 22:09:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:15,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:15,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:15,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 339 transitions, 4200 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) [2024-06-21 22:09:15,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:15,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:17,390 INFO L124 PetriNetUnfolderBase]: 4705/7700 cut-off events. [2024-06-21 22:09:17,390 INFO L125 PetriNetUnfolderBase]: For 1096193/1096193 co-relation queries the response was YES. [2024-06-21 22:09:17,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49788 conditions, 7700 events. 4705/7700 cut-off events. For 1096193/1096193 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 50840 event pairs, 1551 based on Foata normal form. 54/7748 useless extension candidates. Maximal degree in co-relation 49638. Up to 6606 conditions per place. [2024-06-21 22:09:17,476 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 76 changer transitions 5/367 dead transitions. [2024-06-21 22:09:17,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 367 transitions, 5026 flow [2024-06-21 22:09:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:09:17,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 22:09:17,477 INFO L175 Difference]: Start difference. First operand has 316 places, 339 transitions, 4200 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:09:17,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 367 transitions, 5026 flow [2024-06-21 22:09:20,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 367 transitions, 4761 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:20,683 INFO L231 Difference]: Finished difference. Result has 318 places, 338 transitions, 4085 flow [2024-06-21 22:09:20,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4085, PETRI_PLACES=318, PETRI_TRANSITIONS=338} [2024-06-21 22:09:20,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 22:09:20,683 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 338 transitions, 4085 flow [2024-06-21 22:09:20,684 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) [2024-06-21 22:09:20,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:20,684 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, 1] [2024-06-21 22:09:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 22:09:20,684 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)] === [2024-06-21 22:09:20,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash -4709640, now seen corresponding path program 16 times [2024-06-21 22:09:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235886297] [2024-06-21 22:09:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235886297] [2024-06-21 22:09:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235886297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:24,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:24,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633594590] [2024-06-21 22:09:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:24,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 338 transitions, 4085 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) [2024-06-21 22:09:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:24,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:24,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:26,495 INFO L124 PetriNetUnfolderBase]: 4570/7507 cut-off events. [2024-06-21 22:09:26,495 INFO L125 PetriNetUnfolderBase]: For 823584/823584 co-relation queries the response was YES. [2024-06-21 22:09:26,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43119 conditions, 7507 events. 4570/7507 cut-off events. For 823584/823584 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49631 event pairs, 1476 based on Foata normal form. 54/7555 useless extension candidates. Maximal degree in co-relation 42968. Up to 6409 conditions per place. [2024-06-21 22:09:26,597 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 80 changer transitions 5/371 dead transitions. [2024-06-21 22:09:26,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 371 transitions, 4929 flow [2024-06-21 22:09:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:09:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:09:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 22:09:26,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 22:09:26,599 INFO L175 Difference]: Start difference. First operand has 318 places, 338 transitions, 4085 flow. Second operand 11 states and 185 transitions. [2024-06-21 22:09:26,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 371 transitions, 4929 flow [2024-06-21 22:09:28,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 371 transitions, 4753 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 22:09:28,611 INFO L231 Difference]: Finished difference. Result has 321 places, 337 transitions, 4066 flow [2024-06-21 22:09:28,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3909, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4066, PETRI_PLACES=321, PETRI_TRANSITIONS=337} [2024-06-21 22:09:28,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 22:09:28,611 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 337 transitions, 4066 flow [2024-06-21 22:09:28,612 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) [2024-06-21 22:09:28,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:28,612 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, 1] [2024-06-21 22:09:28,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 22:09:28,612 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)] === [2024-06-21 22:09:28,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:28,612 INFO L85 PathProgramCache]: Analyzing trace with hash -506349770, now seen corresponding path program 5 times [2024-06-21 22:09:28,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:28,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068460750] [2024-06-21 22:09:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:32,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068460750] [2024-06-21 22:09:32,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068460750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:32,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:32,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30840328] [2024-06-21 22:09:32,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:32,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:32,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 337 transitions, 4066 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) [2024-06-21 22:09:32,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:32,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:32,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:35,009 INFO L124 PetriNetUnfolderBase]: 4783/7890 cut-off events. [2024-06-21 22:09:35,009 INFO L125 PetriNetUnfolderBase]: For 802524/802524 co-relation queries the response was YES. [2024-06-21 22:09:35,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48976 conditions, 7890 events. 4783/7890 cut-off events. For 802524/802524 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52556 event pairs, 1214 based on Foata normal form. 6/7890 useless extension candidates. Maximal degree in co-relation 48824. Up to 4991 conditions per place. [2024-06-21 22:09:35,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 140 changer transitions 0/394 dead transitions. [2024-06-21 22:09:35,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 394 transitions, 5357 flow [2024-06-21 22:09:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 22:09:35,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 22:09:35,100 INFO L175 Difference]: Start difference. First operand has 321 places, 337 transitions, 4066 flow. Second operand 9 states and 180 transitions. [2024-06-21 22:09:35,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 394 transitions, 5357 flow [2024-06-21 22:09:37,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 394 transitions, 5179 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 22:09:37,934 INFO L231 Difference]: Finished difference. Result has 320 places, 339 transitions, 4230 flow [2024-06-21 22:09:37,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4230, PETRI_PLACES=320, PETRI_TRANSITIONS=339} [2024-06-21 22:09:37,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 22:09:37,935 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 339 transitions, 4230 flow [2024-06-21 22:09:37,935 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) [2024-06-21 22:09:37,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:37,935 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, 1] [2024-06-21 22:09:37,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 22:09:37,935 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)] === [2024-06-21 22:09:37,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash 153792826, now seen corresponding path program 6 times [2024-06-21 22:09:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270516674] [2024-06-21 22:09:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:41,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270516674] [2024-06-21 22:09:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270516674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526566495] [2024-06-21 22:09:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:41,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:41,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:41,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:41,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 339 transitions, 4230 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) [2024-06-21 22:09:41,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:41,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:41,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:44,249 INFO L124 PetriNetUnfolderBase]: 4803/7918 cut-off events. [2024-06-21 22:09:44,249 INFO L125 PetriNetUnfolderBase]: For 821953/821953 co-relation queries the response was YES. [2024-06-21 22:09:44,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49773 conditions, 7918 events. 4803/7918 cut-off events. For 821953/821953 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 52799 event pairs, 1311 based on Foata normal form. 6/7918 useless extension candidates. Maximal degree in co-relation 49620. Up to 5003 conditions per place. [2024-06-21 22:09:44,354 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 139 changer transitions 0/388 dead transitions. [2024-06-21 22:09:44,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 388 transitions, 5455 flow [2024-06-21 22:09:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 22:09:44,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 22:09:44,356 INFO L175 Difference]: Start difference. First operand has 320 places, 339 transitions, 4230 flow. Second operand 9 states and 173 transitions. [2024-06-21 22:09:44,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 388 transitions, 5455 flow [2024-06-21 22:09:47,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 388 transitions, 5130 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:47,622 INFO L231 Difference]: Finished difference. Result has 323 places, 340 transitions, 4217 flow [2024-06-21 22:09:47,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4217, PETRI_PLACES=323, PETRI_TRANSITIONS=340} [2024-06-21 22:09:47,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 22:09:47,622 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 340 transitions, 4217 flow [2024-06-21 22:09:47,622 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) [2024-06-21 22:09:47,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:47,622 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, 1] [2024-06-21 22:09:47,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 22:09:47,623 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)] === [2024-06-21 22:09:47,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2108751816, now seen corresponding path program 7 times [2024-06-21 22:09:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:47,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837664473] [2024-06-21 22:09:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:51,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837664473] [2024-06-21 22:09:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837664473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:51,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:51,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:51,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854683001] [2024-06-21 22:09:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:51,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:51,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 340 transitions, 4217 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) [2024-06-21 22:09:51,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:51,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:51,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:53,888 INFO L124 PetriNetUnfolderBase]: 4823/7962 cut-off events. [2024-06-21 22:09:53,888 INFO L125 PetriNetUnfolderBase]: For 832439/832439 co-relation queries the response was YES. [2024-06-21 22:09:53,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49820 conditions, 7962 events. 4823/7962 cut-off events. For 832439/832439 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53342 event pairs, 1349 based on Foata normal form. 6/7962 useless extension candidates. Maximal degree in co-relation 49666. Up to 6400 conditions per place. [2024-06-21 22:09:53,973 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 130 changer transitions 0/377 dead transitions. [2024-06-21 22:09:53,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 377 transitions, 5128 flow [2024-06-21 22:09:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:09:53,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:09:53,974 INFO L175 Difference]: Start difference. First operand has 323 places, 340 transitions, 4217 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:09:53,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 377 transitions, 5128 flow [2024-06-21 22:09:57,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 377 transitions, 4872 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:57,375 INFO L231 Difference]: Finished difference. Result has 326 places, 341 transitions, 4245 flow [2024-06-21 22:09:57,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4245, PETRI_PLACES=326, PETRI_TRANSITIONS=341} [2024-06-21 22:09:57,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 22:09:57,376 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 341 transitions, 4245 flow [2024-06-21 22:09:57,376 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) [2024-06-21 22:09:57,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:57,376 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, 1] [2024-06-21 22:09:57,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 22:09:57,376 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)] === [2024-06-21 22:09:57,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -743407818, now seen corresponding path program 8 times [2024-06-21 22:09:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:57,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902842144] [2024-06-21 22:09:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:00,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902842144] [2024-06-21 22:10:00,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902842144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:00,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:00,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581613797] [2024-06-21 22:10:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:00,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:00,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:00,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 341 transitions, 4245 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) [2024-06-21 22:10:00,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:00,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:00,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:03,442 INFO L124 PetriNetUnfolderBase]: 5229/8644 cut-off events. [2024-06-21 22:10:03,443 INFO L125 PetriNetUnfolderBase]: For 1290480/1290480 co-relation queries the response was YES. [2024-06-21 22:10:03,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60489 conditions, 8644 events. 5229/8644 cut-off events. For 1290480/1290480 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58308 event pairs, 1510 based on Foata normal form. 6/8644 useless extension candidates. Maximal degree in co-relation 60334. Up to 4726 conditions per place. [2024-06-21 22:10:03,556 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 265 selfloop transitions, 131 changer transitions 0/401 dead transitions. [2024-06-21 22:10:03,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 401 transitions, 5769 flow [2024-06-21 22:10:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 22:10:03,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 22:10:03,557 INFO L175 Difference]: Start difference. First operand has 326 places, 341 transitions, 4245 flow. Second operand 9 states and 183 transitions. [2024-06-21 22:10:03,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 401 transitions, 5769 flow [2024-06-21 22:10:07,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 401 transitions, 5503 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:07,388 INFO L231 Difference]: Finished difference. Result has 328 places, 342 transitions, 4273 flow [2024-06-21 22:10:07,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4273, PETRI_PLACES=328, PETRI_TRANSITIONS=342} [2024-06-21 22:10:07,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 22:10:07,388 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 342 transitions, 4273 flow [2024-06-21 22:10:07,388 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) [2024-06-21 22:10:07,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:07,389 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, 1] [2024-06-21 22:10:07,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 22:10:07,389 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)] === [2024-06-21 22:10:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1317548456, now seen corresponding path program 9 times [2024-06-21 22:10:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021179989] [2024-06-21 22:10:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:07,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:11,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:11,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021179989] [2024-06-21 22:10:11,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021179989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:11,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:11,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108986886] [2024-06-21 22:10:11,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:11,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:11,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 342 transitions, 4273 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) [2024-06-21 22:10:11,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:11,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:11,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:13,748 INFO L124 PetriNetUnfolderBase]: 5249/8680 cut-off events. [2024-06-21 22:10:13,749 INFO L125 PetriNetUnfolderBase]: For 1316545/1316545 co-relation queries the response was YES. [2024-06-21 22:10:13,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61074 conditions, 8680 events. 5249/8680 cut-off events. For 1316545/1316545 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58601 event pairs, 1502 based on Foata normal form. 6/8680 useless extension candidates. Maximal degree in co-relation 60918. Up to 4738 conditions per place. [2024-06-21 22:10:13,849 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 129 changer transitions 0/395 dead transitions. [2024-06-21 22:10:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 395 transitions, 5757 flow [2024-06-21 22:10:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 22:10:13,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 22:10:13,850 INFO L175 Difference]: Start difference. First operand has 328 places, 342 transitions, 4273 flow. Second operand 9 states and 176 transitions. [2024-06-21 22:10:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 395 transitions, 5757 flow [2024-06-21 22:10:17,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 395 transitions, 5183 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-21 22:10:17,573 INFO L231 Difference]: Finished difference. Result has 324 places, 343 transitions, 3991 flow [2024-06-21 22:10:17,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3991, PETRI_PLACES=324, PETRI_TRANSITIONS=343} [2024-06-21 22:10:17,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 22:10:17,573 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 343 transitions, 3991 flow [2024-06-21 22:10:17,573 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) [2024-06-21 22:10:17,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:17,574 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, 1] [2024-06-21 22:10:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 22:10:17,574 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)] === [2024-06-21 22:10:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1074671192, now seen corresponding path program 10 times [2024-06-21 22:10:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503216512] [2024-06-21 22:10:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:21,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:21,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503216512] [2024-06-21 22:10:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503216512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:21,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:21,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880833161] [2024-06-21 22:10:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:21,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:21,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:21,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 343 transitions, 3991 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) [2024-06-21 22:10:21,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:21,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:21,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:24,070 INFO L124 PetriNetUnfolderBase]: 5543/9158 cut-off events. [2024-06-21 22:10:24,070 INFO L125 PetriNetUnfolderBase]: For 1723090/1723090 co-relation queries the response was YES. [2024-06-21 22:10:24,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65314 conditions, 9158 events. 5543/9158 cut-off events. For 1723090/1723090 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 62374 event pairs, 1557 based on Foata normal form. 30/9182 useless extension candidates. Maximal degree in co-relation 65164. Up to 4887 conditions per place. [2024-06-21 22:10:24,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 124 changer transitions 8/396 dead transitions. [2024-06-21 22:10:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 396 transitions, 5458 flow [2024-06-21 22:10:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 22:10:24,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 22:10:24,191 INFO L175 Difference]: Start difference. First operand has 324 places, 343 transitions, 3991 flow. Second operand 9 states and 176 transitions. [2024-06-21 22:10:24,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 396 transitions, 5458 flow [2024-06-21 22:10:29,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 396 transitions, 5209 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:29,381 INFO L231 Difference]: Finished difference. Result has 327 places, 342 transitions, 4000 flow [2024-06-21 22:10:29,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4000, PETRI_PLACES=327, PETRI_TRANSITIONS=342} [2024-06-21 22:10:29,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 22:10:29,381 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 342 transitions, 4000 flow [2024-06-21 22:10:29,381 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) [2024-06-21 22:10:29,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:29,382 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, 1] [2024-06-21 22:10:29,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 22:10:29,382 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)] === [2024-06-21 22:10:29,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash 781840924, now seen corresponding path program 11 times [2024-06-21 22:10:29,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:29,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673871464] [2024-06-21 22:10:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:29,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:33,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673871464] [2024-06-21 22:10:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673871464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:33,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:33,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576969479] [2024-06-21 22:10:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:33,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:33,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:33,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 342 transitions, 4000 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) [2024-06-21 22:10:33,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:33,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:33,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:35,947 INFO L124 PetriNetUnfolderBase]: 5543/9174 cut-off events. [2024-06-21 22:10:35,947 INFO L125 PetriNetUnfolderBase]: For 1825816/1825816 co-relation queries the response was YES. [2024-06-21 22:10:36,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65745 conditions, 9174 events. 5543/9174 cut-off events. For 1825816/1825816 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 63119 event pairs, 1731 based on Foata normal form. 42/9210 useless extension candidates. Maximal degree in co-relation 65594. Up to 7128 conditions per place. [2024-06-21 22:10:36,066 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 124 changer transitions 11/383 dead transitions. [2024-06-21 22:10:36,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 383 transitions, 4944 flow [2024-06-21 22:10:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 22:10:36,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:10:36,067 INFO L175 Difference]: Start difference. First operand has 327 places, 342 transitions, 4000 flow. Second operand 9 states and 168 transitions. [2024-06-21 22:10:36,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 383 transitions, 4944 flow [2024-06-21 22:10:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 383 transitions, 4688 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:41,303 INFO L231 Difference]: Finished difference. Result has 329 places, 341 transitions, 3993 flow [2024-06-21 22:10:41,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3993, PETRI_PLACES=329, PETRI_TRANSITIONS=341} [2024-06-21 22:10:41,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 22:10:41,304 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 341 transitions, 3993 flow [2024-06-21 22:10:41,304 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) [2024-06-21 22:10:41,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:41,304 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, 1] [2024-06-21 22:10:41,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 22:10:41,304 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)] === [2024-06-21 22:10:41,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:41,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1650604632, now seen corresponding path program 12 times [2024-06-21 22:10:41,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:41,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803327326] [2024-06-21 22:10:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:41,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:45,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803327326] [2024-06-21 22:10:45,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803327326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:45,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:45,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107397620] [2024-06-21 22:10:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:45,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:45,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:45,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 341 transitions, 3993 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) [2024-06-21 22:10:45,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:45,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:45,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:47,932 INFO L124 PetriNetUnfolderBase]: 5171/8566 cut-off events. [2024-06-21 22:10:47,932 INFO L125 PetriNetUnfolderBase]: For 1632447/1632447 co-relation queries the response was YES. [2024-06-21 22:10:48,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59826 conditions, 8566 events. 5171/8566 cut-off events. For 1632447/1632447 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 58254 event pairs, 1507 based on Foata normal form. 42/8602 useless extension candidates. Maximal degree in co-relation 59674. Up to 5632 conditions per place. [2024-06-21 22:10:48,037 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 121 changer transitions 14/387 dead transitions. [2024-06-21 22:10:48,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 387 transitions, 5201 flow [2024-06-21 22:10:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 22:10:48,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:10:48,038 INFO L175 Difference]: Start difference. First operand has 329 places, 341 transitions, 3993 flow. Second operand 9 states and 171 transitions. [2024-06-21 22:10:48,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 387 transitions, 5201 flow [2024-06-21 22:10:52,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 387 transitions, 4939 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:52,417 INFO L231 Difference]: Finished difference. Result has 331 places, 338 transitions, 3965 flow [2024-06-21 22:10:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3965, PETRI_PLACES=331, PETRI_TRANSITIONS=338} [2024-06-21 22:10:52,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 22:10:52,418 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 338 transitions, 3965 flow [2024-06-21 22:10:52,418 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) [2024-06-21 22:10:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:52,418 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, 1] [2024-06-21 22:10:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 22:10:52,418 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)] === [2024-06-21 22:10:52,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1574145114, now seen corresponding path program 13 times [2024-06-21 22:10:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290447712] [2024-06-21 22:10:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290447712] [2024-06-21 22:10:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290447712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:56,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177354849] [2024-06-21 22:10:56,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:56,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:56,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:56,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:56,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:56,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 338 transitions, 3965 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) [2024-06-21 22:10:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:58,424 INFO L124 PetriNetUnfolderBase]: 4842/8007 cut-off events. [2024-06-21 22:10:58,424 INFO L125 PetriNetUnfolderBase]: For 1392905/1392905 co-relation queries the response was YES. [2024-06-21 22:10:58,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53229 conditions, 8007 events. 4842/8007 cut-off events. For 1392905/1392905 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 53987 event pairs, 1624 based on Foata normal form. 42/8043 useless extension candidates. Maximal degree in co-relation 53076. Up to 6611 conditions per place. [2024-06-21 22:10:58,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 74 changer transitions 12/372 dead transitions. [2024-06-21 22:10:58,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 372 transitions, 4847 flow [2024-06-21 22:10:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:10:58,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:10:58,529 INFO L175 Difference]: Start difference. First operand has 331 places, 338 transitions, 3965 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:10:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 372 transitions, 4847 flow [2024-06-21 22:11:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 372 transitions, 4585 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:02,707 INFO L231 Difference]: Finished difference. Result has 333 places, 335 transitions, 3820 flow [2024-06-21 22:11:02,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3703, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3820, PETRI_PLACES=333, PETRI_TRANSITIONS=335} [2024-06-21 22:11:02,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 22:11:02,707 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 335 transitions, 3820 flow [2024-06-21 22:11:02,707 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) [2024-06-21 22:11:02,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:02,707 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, 1] [2024-06-21 22:11:02,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 22:11:02,707 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)] === [2024-06-21 22:11:02,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1373138520, now seen corresponding path program 14 times [2024-06-21 22:11:02,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:02,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840953706] [2024-06-21 22:11:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:02,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:06,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840953706] [2024-06-21 22:11:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840953706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:06,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265694939] [2024-06-21 22:11:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:06,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:06,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 335 transitions, 3820 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) [2024-06-21 22:11:06,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:06,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:06,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:08,642 INFO L124 PetriNetUnfolderBase]: 4429/7328 cut-off events. [2024-06-21 22:11:08,642 INFO L125 PetriNetUnfolderBase]: For 1144838/1144838 co-relation queries the response was YES. [2024-06-21 22:11:08,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45784 conditions, 7328 events. 4429/7328 cut-off events. For 1144838/1144838 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 48304 event pairs, 1323 based on Foata normal form. 42/7364 useless extension candidates. Maximal degree in co-relation 45630. Up to 4519 conditions per place. [2024-06-21 22:11:08,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 71 changer transitions 15/374 dead transitions. [2024-06-21 22:11:08,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 374 transitions, 4966 flow [2024-06-21 22:11:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:11:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:11:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:11:08,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:11:08,730 INFO L175 Difference]: Start difference. First operand has 333 places, 335 transitions, 3820 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:11:08,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 374 transitions, 4966 flow [2024-06-21 22:11:11,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 374 transitions, 4763 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 22:11:11,880 INFO L231 Difference]: Finished difference. Result has 333 places, 330 transitions, 3711 flow [2024-06-21 22:11:11,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3711, PETRI_PLACES=333, PETRI_TRANSITIONS=330} [2024-06-21 22:11:11,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 22:11:11,881 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 330 transitions, 3711 flow [2024-06-21 22:11:11,881 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) [2024-06-21 22:11:11,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:11,881 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, 1] [2024-06-21 22:11:11,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 22:11:11,882 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)] === [2024-06-21 22:11:11,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:11,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1961560, now seen corresponding path program 15 times [2024-06-21 22:11:11,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:11,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671070847] [2024-06-21 22:11:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:11,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:16,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671070847] [2024-06-21 22:11:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671070847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:16,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537113605] [2024-06-21 22:11:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:16,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:16,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 330 transitions, 3711 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) [2024-06-21 22:11:16,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:16,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:16,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:18,299 INFO L124 PetriNetUnfolderBase]: 4076/6747 cut-off events. [2024-06-21 22:11:18,300 INFO L125 PetriNetUnfolderBase]: For 885170/885170 co-relation queries the response was YES. [2024-06-21 22:11:18,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38587 conditions, 6747 events. 4076/6747 cut-off events. For 885170/885170 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44302 event pairs, 1216 based on Foata normal form. 42/6783 useless extension candidates. Maximal degree in co-relation 38432. Up to 5489 conditions per place. [2024-06-21 22:11:18,385 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 78 changer transitions 10/368 dead transitions. [2024-06-21 22:11:18,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 368 transitions, 4593 flow [2024-06-21 22:11:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:11:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:11:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 22:11:18,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 22:11:18,386 INFO L175 Difference]: Start difference. First operand has 333 places, 330 transitions, 3711 flow. Second operand 11 states and 188 transitions. [2024-06-21 22:11:18,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 368 transitions, 4593 flow [2024-06-21 22:11:21,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 368 transitions, 4411 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 22:11:21,155 INFO L231 Difference]: Finished difference. Result has 335 places, 329 transitions, 3673 flow [2024-06-21 22:11:21,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3673, PETRI_PLACES=335, PETRI_TRANSITIONS=329} [2024-06-21 22:11:21,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 22:11:21,156 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 329 transitions, 3673 flow [2024-06-21 22:11:21,156 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) [2024-06-21 22:11:21,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:21,156 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, 1, 1] [2024-06-21 22:11:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 22:11:21,156 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)] === [2024-06-21 22:11:21,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1280202361, now seen corresponding path program 1 times [2024-06-21 22:11:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379004524] [2024-06-21 22:11:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:24,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379004524] [2024-06-21 22:11:24,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379004524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:24,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:24,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669214958] [2024-06-21 22:11:24,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:24,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:24,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:24,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 329 transitions, 3673 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) [2024-06-21 22:11:24,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:24,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:24,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:26,608 INFO L124 PetriNetUnfolderBase]: 4272/7051 cut-off events. [2024-06-21 22:11:26,608 INFO L125 PetriNetUnfolderBase]: For 1052694/1052694 co-relation queries the response was YES. [2024-06-21 22:11:26,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43128 conditions, 7051 events. 4272/7051 cut-off events. For 1052694/1052694 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 45777 event pairs, 720 based on Foata normal form. 32/7077 useless extension candidates. Maximal degree in co-relation 42972. Up to 3185 conditions per place. [2024-06-21 22:11:26,842 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 126 changer transitions 22/385 dead transitions. [2024-06-21 22:11:26,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 385 transitions, 5145 flow [2024-06-21 22:11:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:11:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:11:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 22:11:26,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 22:11:26,843 INFO L175 Difference]: Start difference. First operand has 335 places, 329 transitions, 3673 flow. Second operand 9 states and 178 transitions. [2024-06-21 22:11:26,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 385 transitions, 5145 flow [2024-06-21 22:11:30,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 385 transitions, 4925 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 22:11:30,901 INFO L231 Difference]: Finished difference. Result has 333 places, 324 transitions, 3640 flow [2024-06-21 22:11:30,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3640, PETRI_PLACES=333, PETRI_TRANSITIONS=324} [2024-06-21 22:11:30,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 22:11:30,901 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 324 transitions, 3640 flow [2024-06-21 22:11:30,901 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) [2024-06-21 22:11:30,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:30,901 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, 1, 1] [2024-06-21 22:11:30,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 22:11:30,902 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)] === [2024-06-21 22:11:30,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1427811961, now seen corresponding path program 2 times [2024-06-21 22:11:30,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:30,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678355645] [2024-06-21 22:11:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:30,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678355645] [2024-06-21 22:11:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678355645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:34,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85300600] [2024-06-21 22:11:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:34,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:34,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 324 transitions, 3640 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) [2024-06-21 22:11:34,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:34,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:34,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:36,485 INFO L124 PetriNetUnfolderBase]: 4244/6993 cut-off events. [2024-06-21 22:11:36,485 INFO L125 PetriNetUnfolderBase]: For 1288091/1288091 co-relation queries the response was YES. [2024-06-21 22:11:36,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46645 conditions, 6993 events. 4244/6993 cut-off events. For 1288091/1288091 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45325 event pairs, 1233 based on Foata normal form. 32/7019 useless extension candidates. Maximal degree in co-relation 46488. Up to 5743 conditions per place. [2024-06-21 22:11:36,561 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 305 selfloop transitions, 45 changer transitions 10/365 dead transitions. [2024-06-21 22:11:36,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 365 transitions, 4766 flow [2024-06-21 22:11:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:11:36,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:11:36,563 INFO L175 Difference]: Start difference. First operand has 333 places, 324 transitions, 3640 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:11:36,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 365 transitions, 4766 flow [2024-06-21 22:11:41,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 365 transitions, 4502 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 22:11:41,402 INFO L231 Difference]: Finished difference. Result has 327 places, 322 transitions, 3456 flow [2024-06-21 22:11:41,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3456, PETRI_PLACES=327, PETRI_TRANSITIONS=322} [2024-06-21 22:11:41,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 22:11:41,403 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 322 transitions, 3456 flow [2024-06-21 22:11:41,403 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) [2024-06-21 22:11:41,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:41,403 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, 1, 1] [2024-06-21 22:11:41,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 22:11:41,403 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)] === [2024-06-21 22:11:41,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1016471677, now seen corresponding path program 3 times [2024-06-21 22:11:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:41,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332015318] [2024-06-21 22:11:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:45,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332015318] [2024-06-21 22:11:45,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332015318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:45,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:45,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023491470] [2024-06-21 22:11:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:45,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:45,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:45,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 322 transitions, 3456 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) [2024-06-21 22:11:45,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:45,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:45,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:47,200 INFO L124 PetriNetUnfolderBase]: 3660/6069 cut-off events. [2024-06-21 22:11:47,200 INFO L125 PetriNetUnfolderBase]: For 528378/528378 co-relation queries the response was YES. [2024-06-21 22:11:47,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30335 conditions, 6069 events. 3660/6069 cut-off events. For 528378/528378 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 38968 event pairs, 932 based on Foata normal form. 32/6095 useless extension candidates. Maximal degree in co-relation 30180. Up to 5123 conditions per place. [2024-06-21 22:11:47,267 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 282 selfloop transitions, 36 changer transitions 33/356 dead transitions. [2024-06-21 22:11:47,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 356 transitions, 4294 flow [2024-06-21 22:11:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:11:47,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 22:11:47,269 INFO L175 Difference]: Start difference. First operand has 327 places, 322 transitions, 3456 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:11:47,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 356 transitions, 4294 flow [2024-06-21 22:11:49,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 356 transitions, 4201 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:49,488 INFO L231 Difference]: Finished difference. Result has 326 places, 311 transitions, 3284 flow [2024-06-21 22:11:49,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3284, PETRI_PLACES=326, PETRI_TRANSITIONS=311} [2024-06-21 22:11:49,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 22:11:49,488 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 311 transitions, 3284 flow [2024-06-21 22:11:49,488 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) [2024-06-21 22:11:49,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:49,488 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, 1, 1, 1] [2024-06-21 22:11:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 22:11:49,489 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)] === [2024-06-21 22:11:49,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash 636577283, now seen corresponding path program 4 times [2024-06-21 22:11:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:49,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338477103] [2024-06-21 22:11:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:49,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:52,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338477103] [2024-06-21 22:11:52,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338477103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:52,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:52,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629227926] [2024-06-21 22:11:52,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:52,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:52,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:52,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:52,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 311 transitions, 3284 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) [2024-06-21 22:11:52,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:52,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:52,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:55,072 INFO L124 PetriNetUnfolderBase]: 3832/6343 cut-off events. [2024-06-21 22:11:55,072 INFO L125 PetriNetUnfolderBase]: For 856890/856890 co-relation queries the response was YES. [2024-06-21 22:11:55,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35988 conditions, 6343 events. 3832/6343 cut-off events. For 856890/856890 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40859 event pairs, 782 based on Foata normal form. 40/6380 useless extension candidates. Maximal degree in co-relation 35834. Up to 3817 conditions per place. [2024-06-21 22:11:55,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 225 selfloop transitions, 108 changer transitions 15/353 dead transitions. [2024-06-21 22:11:55,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 353 transitions, 4418 flow [2024-06-21 22:11:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 22:11:55,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 22:11:55,138 INFO L175 Difference]: Start difference. First operand has 326 places, 311 transitions, 3284 flow. Second operand 8 states and 155 transitions. [2024-06-21 22:11:55,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 353 transitions, 4418 flow [2024-06-21 22:11:57,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 353 transitions, 4319 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 22:11:57,810 INFO L231 Difference]: Finished difference. Result has 316 places, 304 transitions, 3332 flow [2024-06-21 22:11:57,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3332, PETRI_PLACES=316, PETRI_TRANSITIONS=304} [2024-06-21 22:11:57,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 22:11:57,811 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 304 transitions, 3332 flow [2024-06-21 22:11:57,811 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) [2024-06-21 22:11:57,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:57,811 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, 1, 1, 1] [2024-06-21 22:11:57,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 22:11:57,811 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)] === [2024-06-21 22:11:57,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:57,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1471115269, now seen corresponding path program 5 times [2024-06-21 22:11:57,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:57,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660291099] [2024-06-21 22:11:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:01,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:01,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660291099] [2024-06-21 22:12:01,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660291099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:01,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:01,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:01,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427462379] [2024-06-21 22:12:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:01,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:01,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:01,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 304 transitions, 3332 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) [2024-06-21 22:12:01,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:01,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:01,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:03,481 INFO L124 PetriNetUnfolderBase]: 3584/5943 cut-off events. [2024-06-21 22:12:03,481 INFO L125 PetriNetUnfolderBase]: For 813637/813637 co-relation queries the response was YES. [2024-06-21 22:12:03,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34231 conditions, 5943 events. 3584/5943 cut-off events. For 813637/813637 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37957 event pairs, 910 based on Foata normal form. 40/5980 useless extension candidates. Maximal degree in co-relation 34083. Up to 4281 conditions per place. [2024-06-21 22:12:03,544 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 94 changer transitions 7/339 dead transitions. [2024-06-21 22:12:03,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 339 transitions, 4380 flow [2024-06-21 22:12:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:12:03,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:12:03,545 INFO L175 Difference]: Start difference. First operand has 316 places, 304 transitions, 3332 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:12:03,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 339 transitions, 4380 flow [2024-06-21 22:12:06,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 339 transitions, 4131 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 22:12:06,087 INFO L231 Difference]: Finished difference. Result has 310 places, 301 transitions, 3260 flow [2024-06-21 22:12:06,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3260, PETRI_PLACES=310, PETRI_TRANSITIONS=301} [2024-06-21 22:12:06,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 22:12:06,088 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 301 transitions, 3260 flow [2024-06-21 22:12:06,088 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) [2024-06-21 22:12:06,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:06,088 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, 1, 1] [2024-06-21 22:12:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 22:12:06,088 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)] === [2024-06-21 22:12:06,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1649885167, now seen corresponding path program 6 times [2024-06-21 22:12:06,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092061546] [2024-06-21 22:12:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092061546] [2024-06-21 22:12:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092061546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:10,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823167544] [2024-06-21 22:12:10,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:10,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:10,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:10,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 301 transitions, 3260 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) [2024-06-21 22:12:10,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:10,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:11,941 INFO L124 PetriNetUnfolderBase]: 3326/5549 cut-off events. [2024-06-21 22:12:11,941 INFO L125 PetriNetUnfolderBase]: For 547319/547319 co-relation queries the response was YES. [2024-06-21 22:12:11,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27642 conditions, 5549 events. 3326/5549 cut-off events. For 547319/547319 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35268 event pairs, 864 based on Foata normal form. 44/5590 useless extension candidates. Maximal degree in co-relation 27497. Up to 4365 conditions per place. [2024-06-21 22:12:11,998 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 82 changer transitions 14/328 dead transitions. [2024-06-21 22:12:11,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 328 transitions, 4014 flow [2024-06-21 22:12:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:12:12,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:12:12,000 INFO L175 Difference]: Start difference. First operand has 310 places, 301 transitions, 3260 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:12:12,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 328 transitions, 4014 flow [2024-06-21 22:12:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 328 transitions, 3817 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 22:12:14,112 INFO L231 Difference]: Finished difference. Result has 308 places, 289 transitions, 3116 flow [2024-06-21 22:12:14,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3116, PETRI_PLACES=308, PETRI_TRANSITIONS=289} [2024-06-21 22:12:14,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 22:12:14,113 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 289 transitions, 3116 flow [2024-06-21 22:12:14,113 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) [2024-06-21 22:12:14,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:14,113 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, 1, 1] [2024-06-21 22:12:14,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 22:12:14,113 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)] === [2024-06-21 22:12:14,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1130894521, now seen corresponding path program 7 times [2024-06-21 22:12:14,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:14,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170772765] [2024-06-21 22:12:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:14,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:18,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:18,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170772765] [2024-06-21 22:12:18,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170772765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:18,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:18,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:18,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427958983] [2024-06-21 22:12:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:18,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:18,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:18,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:18,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 289 transitions, 3116 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) [2024-06-21 22:12:18,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:18,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:19,847 INFO L124 PetriNetUnfolderBase]: 3376/5585 cut-off events. [2024-06-21 22:12:19,847 INFO L125 PetriNetUnfolderBase]: For 651739/651739 co-relation queries the response was YES. [2024-06-21 22:12:19,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30947 conditions, 5585 events. 3376/5585 cut-off events. For 651739/651739 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34898 event pairs, 797 based on Foata normal form. 32/5614 useless extension candidates. Maximal degree in co-relation 30803. Up to 3749 conditions per place. [2024-06-21 22:12:19,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 65 changer transitions 14/324 dead transitions. [2024-06-21 22:12:19,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 324 transitions, 4116 flow [2024-06-21 22:12:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:12:19,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:12:19,905 INFO L175 Difference]: Start difference. First operand has 308 places, 289 transitions, 3116 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:12:19,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 324 transitions, 4116 flow [2024-06-21 22:12:22,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 324 transitions, 3931 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 22:12:22,712 INFO L231 Difference]: Finished difference. Result has 304 places, 283 transitions, 3000 flow [2024-06-21 22:12:22,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3000, PETRI_PLACES=304, PETRI_TRANSITIONS=283} [2024-06-21 22:12:22,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 22:12:22,712 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 283 transitions, 3000 flow [2024-06-21 22:12:22,712 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) [2024-06-21 22:12:22,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:22,713 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, 1, 1] [2024-06-21 22:12:22,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 22:12:22,713 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)] === [2024-06-21 22:12:22,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1736929135, now seen corresponding path program 8 times [2024-06-21 22:12:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934449] [2024-06-21 22:12:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:22,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:26,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:26,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934449] [2024-06-21 22:12:26,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:26,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:26,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:26,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074983640] [2024-06-21 22:12:26,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:26,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:26,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:26,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:26,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 283 transitions, 3000 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) [2024-06-21 22:12:26,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:26,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:26,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:27,804 INFO L124 PetriNetUnfolderBase]: 3008/5013 cut-off events. [2024-06-21 22:12:27,805 INFO L125 PetriNetUnfolderBase]: For 462670/462670 co-relation queries the response was YES. [2024-06-21 22:12:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25339 conditions, 5013 events. 3008/5013 cut-off events. For 462670/462670 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31251 event pairs, 797 based on Foata normal form. 32/5042 useless extension candidates. Maximal degree in co-relation 25196. Up to 3749 conditions per place. [2024-06-21 22:12:27,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 53 changer transitions 37/315 dead transitions. [2024-06-21 22:12:27,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 315 transitions, 3742 flow [2024-06-21 22:12:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:12:27,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:12:27,863 INFO L175 Difference]: Start difference. First operand has 304 places, 283 transitions, 3000 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:12:27,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 315 transitions, 3742 flow [2024-06-21 22:12:29,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 315 transitions, 3606 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 22:12:29,085 INFO L231 Difference]: Finished difference. Result has 299 places, 256 transitions, 2616 flow [2024-06-21 22:12:29,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2616, PETRI_PLACES=299, PETRI_TRANSITIONS=256} [2024-06-21 22:12:29,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 22:12:29,085 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 256 transitions, 2616 flow [2024-06-21 22:12:29,085 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) [2024-06-21 22:12:29,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:29,086 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, 1, 1] [2024-06-21 22:12:29,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 22:12:29,086 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)] === [2024-06-21 22:12:29,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -184332025, now seen corresponding path program 9 times [2024-06-21 22:12:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:29,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703026450] [2024-06-21 22:12:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703026450] [2024-06-21 22:12:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703026450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:32,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:32,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215530432] [2024-06-21 22:12:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:32,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:32,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:32,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 256 transitions, 2616 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) [2024-06-21 22:12:32,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:32,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:32,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:34,631 INFO L124 PetriNetUnfolderBase]: 3114/5167 cut-off events. [2024-06-21 22:12:34,632 INFO L125 PetriNetUnfolderBase]: For 692136/692136 co-relation queries the response was YES. [2024-06-21 22:12:34,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29291 conditions, 5167 events. 3114/5167 cut-off events. For 692136/692136 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32108 event pairs, 758 based on Foata normal form. 40/5206 useless extension candidates. Maximal degree in co-relation 29150. Up to 2327 conditions per place. [2024-06-21 22:12:34,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 96 changer transitions 27/305 dead transitions. [2024-06-21 22:12:34,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 305 transitions, 3654 flow [2024-06-21 22:12:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 22:12:34,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 22:12:34,693 INFO L175 Difference]: Start difference. First operand has 299 places, 256 transitions, 2616 flow. Second operand 9 states and 167 transitions. [2024-06-21 22:12:34,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 305 transitions, 3654 flow [2024-06-21 22:12:36,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 305 transitions, 3450 flow, removed 15 selfloop flow, removed 18 redundant places. [2024-06-21 22:12:36,552 INFO L231 Difference]: Finished difference. Result has 280 places, 248 transitions, 2538 flow [2024-06-21 22:12:36,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2538, PETRI_PLACES=280, PETRI_TRANSITIONS=248} [2024-06-21 22:12:36,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 22:12:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 248 transitions, 2538 flow [2024-06-21 22:12:36,553 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) [2024-06-21 22:12:36,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:36,553 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, 1, 1] [2024-06-21 22:12:36,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 22:12:36,553 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)] === [2024-06-21 22:12:36,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:36,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1172571789, now seen corresponding path program 1 times [2024-06-21 22:12:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676116162] [2024-06-21 22:12:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676116162] [2024-06-21 22:12:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676116162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:40,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:40,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403419474] [2024-06-21 22:12:40,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:40,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:40,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:40,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 248 transitions, 2538 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:40,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:40,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:40,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:42,572 INFO L124 PetriNetUnfolderBase]: 2846/4747 cut-off events. [2024-06-21 22:12:42,572 INFO L125 PetriNetUnfolderBase]: For 674951/674951 co-relation queries the response was YES. [2024-06-21 22:12:42,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27148 conditions, 4747 events. 2846/4747 cut-off events. For 674951/674951 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29304 event pairs, 804 based on Foata normal form. 44/4790 useless extension candidates. Maximal degree in co-relation 27014. Up to 3483 conditions per place. [2024-06-21 22:12:42,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 95 changer transitions 17/282 dead transitions. [2024-06-21 22:12:42,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 282 transitions, 3212 flow [2024-06-21 22:12:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:12:42,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 22:12:42,625 INFO L175 Difference]: Start difference. First operand has 280 places, 248 transitions, 2538 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:12:42,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 282 transitions, 3212 flow [2024-06-21 22:12:44,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 282 transitions, 2999 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 22:12:44,059 INFO L231 Difference]: Finished difference. Result has 272 places, 243 transitions, 2489 flow [2024-06-21 22:12:44,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2489, PETRI_PLACES=272, PETRI_TRANSITIONS=243} [2024-06-21 22:12:44,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 22:12:44,060 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 243 transitions, 2489 flow [2024-06-21 22:12:44,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:44,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:44,060 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, 1, 1] [2024-06-21 22:12:44,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 22:12:44,060 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)] === [2024-06-21 22:12:44,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:44,061 INFO L85 PathProgramCache]: Analyzing trace with hash -967306775, now seen corresponding path program 2 times [2024-06-21 22:12:44,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:44,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801118122] [2024-06-21 22:12:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801118122] [2024-06-21 22:12:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801118122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847178303] [2024-06-21 22:12:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:48,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:48,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 243 transitions, 2489 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:48,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:48,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:48,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:49,705 INFO L124 PetriNetUnfolderBase]: 2802/4687 cut-off events. [2024-06-21 22:12:49,705 INFO L125 PetriNetUnfolderBase]: For 602981/602981 co-relation queries the response was YES. [2024-06-21 22:12:49,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26283 conditions, 4687 events. 2802/4687 cut-off events. For 602981/602981 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28977 event pairs, 722 based on Foata normal form. 40/4726 useless extension candidates. Maximal degree in co-relation 26154. Up to 3359 conditions per place. [2024-06-21 22:12:49,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 157 selfloop transitions, 83 changer transitions 35/280 dead transitions. [2024-06-21 22:12:49,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 280 transitions, 3189 flow [2024-06-21 22:12:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:12:49,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 22:12:49,756 INFO L175 Difference]: Start difference. First operand has 272 places, 243 transitions, 2489 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:12:49,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 280 transitions, 3189 flow [2024-06-21 22:12:50,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 280 transitions, 2995 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 22:12:50,987 INFO L231 Difference]: Finished difference. Result has 270 places, 229 transitions, 2332 flow [2024-06-21 22:12:50,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2332, PETRI_PLACES=270, PETRI_TRANSITIONS=229} [2024-06-21 22:12:50,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 22:12:50,987 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 229 transitions, 2332 flow [2024-06-21 22:12:50,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:50,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:50,988 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, 1, 1] [2024-06-21 22:12:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 22:12:50,988 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)] === [2024-06-21 22:12:50,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1255941071, now seen corresponding path program 3 times [2024-06-21 22:12:50,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:50,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052347836] [2024-06-21 22:12:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:50,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:54,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:54,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052347836] [2024-06-21 22:12:54,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052347836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:54,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:54,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647813358] [2024-06-21 22:12:54,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:54,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:54,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:54,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:54,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 229 transitions, 2332 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:54,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:54,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:54,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:56,587 INFO L124 PetriNetUnfolderBase]: 2700/4561 cut-off events. [2024-06-21 22:12:56,587 INFO L125 PetriNetUnfolderBase]: For 626479/626479 co-relation queries the response was YES. [2024-06-21 22:12:56,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27684 conditions, 4561 events. 2700/4561 cut-off events. For 626479/626479 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28361 event pairs, 544 based on Foata normal form. 24/4584 useless extension candidates. Maximal degree in co-relation 27556. Up to 1632 conditions per place. [2024-06-21 22:12:56,636 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 86 changer transitions 24/275 dead transitions. [2024-06-21 22:12:56,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 275 transitions, 3462 flow [2024-06-21 22:12:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:12:56,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:12:56,637 INFO L175 Difference]: Start difference. First operand has 270 places, 229 transitions, 2332 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:12:56,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 275 transitions, 3462 flow [2024-06-21 22:12:57,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 275 transitions, 3254 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-21 22:12:57,568 INFO L231 Difference]: Finished difference. Result has 258 places, 220 transitions, 2245 flow [2024-06-21 22:12:57,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2245, PETRI_PLACES=258, PETRI_TRANSITIONS=220} [2024-06-21 22:12:57,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 22:12:57,573 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 220 transitions, 2245 flow [2024-06-21 22:12:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:57,574 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, 1, 1] [2024-06-21 22:12:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 22:12:57,574 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)] === [2024-06-21 22:12:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash 324889911, now seen corresponding path program 4 times [2024-06-21 22:12:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:57,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185319225] [2024-06-21 22:12:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185319225] [2024-06-21 22:13:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185319225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:01,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:01,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:13:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168740336] [2024-06-21 22:13:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:01,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:13:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:13:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:13:01,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:01,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 220 transitions, 2245 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:01,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:01,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:01,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:03,011 INFO L124 PetriNetUnfolderBase]: 2574/4335 cut-off events. [2024-06-21 22:13:03,011 INFO L125 PetriNetUnfolderBase]: For 652933/652933 co-relation queries the response was YES. [2024-06-21 22:13:03,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28384 conditions, 4335 events. 2574/4335 cut-off events. For 652933/652933 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26602 event pairs, 730 based on Foata normal form. 24/4358 useless extension candidates. Maximal degree in co-relation 28262. Up to 2360 conditions per place. [2024-06-21 22:13:03,050 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 76 changer transitions 12/260 dead transitions. [2024-06-21 22:13:03,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 260 transitions, 3289 flow [2024-06-21 22:13:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:13:03,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:13:03,051 INFO L175 Difference]: Start difference. First operand has 258 places, 220 transitions, 2245 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:13:03,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 260 transitions, 3289 flow [2024-06-21 22:13:03,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 260 transitions, 3042 flow, removed 38 selfloop flow, removed 14 redundant places. [2024-06-21 22:13:03,833 INFO L231 Difference]: Finished difference. Result has 245 places, 215 transitions, 2172 flow [2024-06-21 22:13:03,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2172, PETRI_PLACES=245, PETRI_TRANSITIONS=215} [2024-06-21 22:13:03,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 22:13:03,833 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 215 transitions, 2172 flow [2024-06-21 22:13:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:03,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:03,834 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, 1, 1] [2024-06-21 22:13:03,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 22:13:03,834 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)] === [2024-06-21 22:13:03,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1284110759, now seen corresponding path program 5 times [2024-06-21 22:13:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902567976] [2024-06-21 22:13:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:03,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:07,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902567976] [2024-06-21 22:13:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902567976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:07,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:07,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:07,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059367493] [2024-06-21 22:13:07,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:07,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:07,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:07,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:07,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 215 transitions, 2172 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:07,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:07,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:07,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:09,263 INFO L124 PetriNetUnfolderBase]: 2416/4073 cut-off events. [2024-06-21 22:13:09,263 INFO L125 PetriNetUnfolderBase]: For 471617/471617 co-relation queries the response was YES. [2024-06-21 22:13:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23878 conditions, 4073 events. 2416/4073 cut-off events. For 471617/471617 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24717 event pairs, 712 based on Foata normal form. 24/4096 useless extension candidates. Maximal degree in co-relation 23764. Up to 2360 conditions per place. [2024-06-21 22:13:09,301 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 61 changer transitions 38/249 dead transitions. [2024-06-21 22:13:09,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 249 transitions, 2950 flow [2024-06-21 22:13:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:13:09,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:13:09,302 INFO L175 Difference]: Start difference. First operand has 245 places, 215 transitions, 2172 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:13:09,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 249 transitions, 2950 flow [2024-06-21 22:13:10,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 249 transitions, 2794 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 22:13:10,016 INFO L231 Difference]: Finished difference. Result has 244 places, 194 transitions, 1965 flow [2024-06-21 22:13:10,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1965, PETRI_PLACES=244, PETRI_TRANSITIONS=194} [2024-06-21 22:13:10,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 22:13:10,016 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 194 transitions, 1965 flow [2024-06-21 22:13:10,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:10,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:10,016 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, 1, 1] [2024-06-21 22:13:10,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 22:13:10,017 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)] === [2024-06-21 22:13:10,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:10,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1719363093, now seen corresponding path program 6 times [2024-06-21 22:13:10,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:10,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502472323] [2024-06-21 22:13:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:10,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502472323] [2024-06-21 22:13:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502472323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:14,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:14,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392057217] [2024-06-21 22:13:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:14,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 194 transitions, 1965 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:16,371 INFO L124 PetriNetUnfolderBase]: 2308/3865 cut-off events. [2024-06-21 22:13:16,371 INFO L125 PetriNetUnfolderBase]: For 530450/530450 co-relation queries the response was YES. [2024-06-21 22:13:16,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22883 conditions, 3865 events. 2308/3865 cut-off events. For 530450/530450 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23044 event pairs, 708 based on Foata normal form. 44/3908 useless extension candidates. Maximal degree in co-relation 22770. Up to 2789 conditions per place. [2024-06-21 22:13:16,401 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 126 selfloop transitions, 73 changer transitions 16/220 dead transitions. [2024-06-21 22:13:16,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 220 transitions, 2477 flow [2024-06-21 22:13:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 22:13:16,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 22:13:16,403 INFO L175 Difference]: Start difference. First operand has 244 places, 194 transitions, 1965 flow. Second operand 9 states and 148 transitions. [2024-06-21 22:13:16,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 220 transitions, 2477 flow [2024-06-21 22:13:16,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 220 transitions, 2374 flow, removed 14 selfloop flow, removed 18 redundant places. [2024-06-21 22:13:16,946 INFO L231 Difference]: Finished difference. Result has 218 places, 190 transitions, 1980 flow [2024-06-21 22:13:16,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=218, PETRI_TRANSITIONS=190} [2024-06-21 22:13:16,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 22:13:16,946 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 190 transitions, 1980 flow [2024-06-21 22:13:16,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:16,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:16,946 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, 1, 1] [2024-06-21 22:13:16,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 22:13:16,946 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:16,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:16,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1353108401, now seen corresponding path program 7 times [2024-06-21 22:13:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:16,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147195939] [2024-06-21 22:13:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:16,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:20,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147195939] [2024-06-21 22:13:20,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147195939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:20,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:20,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797664985] [2024-06-21 22:13:20,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:20,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:20,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:20,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 190 transitions, 1980 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:20,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:20,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:20,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:22,320 INFO L124 PetriNetUnfolderBase]: 2480/4161 cut-off events. [2024-06-21 22:13:22,320 INFO L125 PetriNetUnfolderBase]: For 472084/472092 co-relation queries the response was YES. [2024-06-21 22:13:22,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25686 conditions, 4161 events. 2480/4161 cut-off events. For 472084/472092 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25295 event pairs, 822 based on Foata normal form. 44/4204 useless extension candidates. Maximal degree in co-relation 25586. Up to 2697 conditions per place. [2024-06-21 22:13:22,358 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 64 changer transitions 19/223 dead transitions. [2024-06-21 22:13:22,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 223 transitions, 2678 flow [2024-06-21 22:13:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:13:22,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:13:22,359 INFO L175 Difference]: Start difference. First operand has 218 places, 190 transitions, 1980 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:13:22,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 223 transitions, 2678 flow [2024-06-21 22:13:23,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 223 transitions, 2524 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 22:13:23,103 INFO L231 Difference]: Finished difference. Result has 216 places, 180 transitions, 1872 flow [2024-06-21 22:13:23,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1872, PETRI_PLACES=216, PETRI_TRANSITIONS=180} [2024-06-21 22:13:23,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 22:13:23,104 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 180 transitions, 1872 flow [2024-06-21 22:13:23,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:23,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:23,104 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, 1, 1] [2024-06-21 22:13:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 22:13:23,104 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:23,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1348581445, now seen corresponding path program 8 times [2024-06-21 22:13:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697979193] [2024-06-21 22:13:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:27,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697979193] [2024-06-21 22:13:27,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697979193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:27,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:27,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:27,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507197701] [2024-06-21 22:13:27,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:27,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:27,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:27,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 180 transitions, 1872 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:28,627 INFO L124 PetriNetUnfolderBase]: 2196/3705 cut-off events. [2024-06-21 22:13:28,627 INFO L125 PetriNetUnfolderBase]: For 371420/371420 co-relation queries the response was YES. [2024-06-21 22:13:28,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20945 conditions, 3705 events. 2196/3705 cut-off events. For 371420/371420 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22186 event pairs, 760 based on Foata normal form. 44/3748 useless extension candidates. Maximal degree in co-relation 20846. Up to 2697 conditions per place. [2024-06-21 22:13:28,658 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 65 changer transitions 18/205 dead transitions. [2024-06-21 22:13:28,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 205 transitions, 2352 flow [2024-06-21 22:13:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 22:13:28,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:13:28,659 INFO L175 Difference]: Start difference. First operand has 216 places, 180 transitions, 1872 flow. Second operand 9 states and 144 transitions. [2024-06-21 22:13:28,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 205 transitions, 2352 flow [2024-06-21 22:13:29,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 205 transitions, 2221 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 22:13:29,106 INFO L231 Difference]: Finished difference. Result has 213 places, 174 transitions, 1831 flow [2024-06-21 22:13:29,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1831, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2024-06-21 22:13:29,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 22:13:29,106 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 1831 flow [2024-06-21 22:13:29,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:29,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:29,106 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, 1, 1] [2024-06-21 22:13:29,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 22:13:29,107 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:29,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:29,107 INFO L85 PathProgramCache]: Analyzing trace with hash -271942457, now seen corresponding path program 9 times [2024-06-21 22:13:29,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:29,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326864824] [2024-06-21 22:13:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326864824] [2024-06-21 22:13:32,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326864824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:32,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:32,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529127898] [2024-06-21 22:13:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:32,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:32,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 1831 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:32,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:32,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:32,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:34,191 INFO L124 PetriNetUnfolderBase]: 2148/3641 cut-off events. [2024-06-21 22:13:34,191 INFO L125 PetriNetUnfolderBase]: For 341004/341004 co-relation queries the response was YES. [2024-06-21 22:13:34,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20467 conditions, 3641 events. 2148/3641 cut-off events. For 341004/341004 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21804 event pairs, 678 based on Foata normal form. 40/3680 useless extension candidates. Maximal degree in co-relation 20370. Up to 2511 conditions per place. [2024-06-21 22:13:34,221 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 112 selfloop transitions, 52 changer transitions 33/202 dead transitions. [2024-06-21 22:13:34,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 202 transitions, 2329 flow [2024-06-21 22:13:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 22:13:34,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:13:34,222 INFO L175 Difference]: Start difference. First operand has 213 places, 174 transitions, 1831 flow. Second operand 9 states and 144 transitions. [2024-06-21 22:13:34,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 202 transitions, 2329 flow [2024-06-21 22:13:34,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 202 transitions, 2195 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 22:13:34,767 INFO L231 Difference]: Finished difference. Result has 210 places, 158 transitions, 1652 flow [2024-06-21 22:13:34,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1652, PETRI_PLACES=210, PETRI_TRANSITIONS=158} [2024-06-21 22:13:34,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 22:13:34,767 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 158 transitions, 1652 flow [2024-06-21 22:13:34,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:34,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:34,767 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, 1, 1] [2024-06-21 22:13:34,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 22:13:34,767 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:34,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1356285565, now seen corresponding path program 10 times [2024-06-21 22:13:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069432484] [2024-06-21 22:13:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:38,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069432484] [2024-06-21 22:13:38,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069432484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:38,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:38,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:13:38,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972871264] [2024-06-21 22:13:38,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:38,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:13:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:13:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:13:38,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:38,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 158 transitions, 1652 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:38,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:38,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:38,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:40,174 INFO L124 PetriNetUnfolderBase]: 2052/3517 cut-off events. [2024-06-21 22:13:40,174 INFO L125 PetriNetUnfolderBase]: For 347742/347750 co-relation queries the response was YES. [2024-06-21 22:13:40,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 3517 events. 2052/3517 cut-off events. For 347742/347750 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21261 event pairs, 658 based on Foata normal form. 24/3540 useless extension candidates. Maximal degree in co-relation 21056. Up to 2267 conditions per place. [2024-06-21 22:13:40,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 56 changer transitions 12/188 dead transitions. [2024-06-21 22:13:40,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 188 transitions, 2254 flow [2024-06-21 22:13:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 22:13:40,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 22:13:40,205 INFO L175 Difference]: Start difference. First operand has 210 places, 158 transitions, 1652 flow. Second operand 9 states and 146 transitions. [2024-06-21 22:13:40,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 188 transitions, 2254 flow [2024-06-21 22:13:40,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 188 transitions, 2122 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-21 22:13:40,629 INFO L231 Difference]: Finished difference. Result has 198 places, 153 transitions, 1616 flow [2024-06-21 22:13:40,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1616, PETRI_PLACES=198, PETRI_TRANSITIONS=153} [2024-06-21 22:13:40,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 22:13:40,629 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 153 transitions, 1616 flow [2024-06-21 22:13:40,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:40,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:40,630 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, 1, 1] [2024-06-21 22:13:40,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 22:13:40,630 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:40,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1687666115, now seen corresponding path program 11 times [2024-06-21 22:13:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:40,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098259457] [2024-06-21 22:13:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:44,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098259457] [2024-06-21 22:13:44,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098259457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:44,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:44,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:13:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053661571] [2024-06-21 22:13:44,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:44,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:13:44,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:13:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:13:44,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:44,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 153 transitions, 1616 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:44,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:44,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:44,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:46,166 INFO L124 PetriNetUnfolderBase]: 1894/3255 cut-off events. [2024-06-21 22:13:46,166 INFO L125 PetriNetUnfolderBase]: For 245474/245482 co-relation queries the response was YES. [2024-06-21 22:13:46,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18196 conditions, 3255 events. 1894/3255 cut-off events. For 245474/245482 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19365 event pairs, 616 based on Foata normal form. 24/3278 useless extension candidates. Maximal degree in co-relation 18106. Up to 2267 conditions per place. [2024-06-21 22:13:46,192 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 35 changer transitions 48/177 dead transitions. [2024-06-21 22:13:46,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 177 transitions, 2036 flow [2024-06-21 22:13:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 22:13:46,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 22:13:46,193 INFO L175 Difference]: Start difference. First operand has 198 places, 153 transitions, 1616 flow. Second operand 9 states and 139 transitions. [2024-06-21 22:13:46,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 177 transitions, 2036 flow [2024-06-21 22:13:46,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 177 transitions, 1924 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 22:13:46,503 INFO L231 Difference]: Finished difference. Result has 197 places, 124 transitions, 1290 flow [2024-06-21 22:13:46,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1290, PETRI_PLACES=197, PETRI_TRANSITIONS=124} [2024-06-21 22:13:46,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 22:13:46,503 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 124 transitions, 1290 flow [2024-06-21 22:13:46,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:46,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:46,504 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, 1, 1] [2024-06-21 22:13:46,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 22:13:46,504 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:46,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1130835981, now seen corresponding path program 12 times [2024-06-21 22:13:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:46,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757956986] [2024-06-21 22:13:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:46,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:50,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:50,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757956986] [2024-06-21 22:13:50,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757956986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:50,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:50,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102097269] [2024-06-21 22:13:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:50,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:50,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:50,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:50,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:50,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:50,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 124 transitions, 1290 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:50,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:50,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:50,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:51,482 INFO L124 PetriNetUnfolderBase]: 1962/3279 cut-off events. [2024-06-21 22:13:51,482 INFO L125 PetriNetUnfolderBase]: For 337805/337813 co-relation queries the response was YES. [2024-06-21 22:13:51,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20471 conditions, 3279 events. 1962/3279 cut-off events. For 337805/337813 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19406 event pairs, 677 based on Foata normal form. 44/3316 useless extension candidates. Maximal degree in co-relation 20382. Up to 2123 conditions per place. [2024-06-21 22:13:51,510 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 88 selfloop transitions, 51 changer transitions 13/157 dead transitions. [2024-06-21 22:13:51,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 157 transitions, 1828 flow [2024-06-21 22:13:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:13:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:13:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-21 22:13:51,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-21 22:13:51,511 INFO L175 Difference]: Start difference. First operand has 197 places, 124 transitions, 1290 flow. Second operand 11 states and 170 transitions. [2024-06-21 22:13:51,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 157 transitions, 1828 flow [2024-06-21 22:13:51,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 157 transitions, 1670 flow, removed 34 selfloop flow, removed 24 redundant places. [2024-06-21 22:13:51,721 INFO L231 Difference]: Finished difference. Result has 162 places, 121 transitions, 1233 flow [2024-06-21 22:13:51,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1233, PETRI_PLACES=162, PETRI_TRANSITIONS=121} [2024-06-21 22:13:51,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 22:13:51,721 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 121 transitions, 1233 flow [2024-06-21 22:13:51,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:51,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:51,721 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, 1, 1] [2024-06-21 22:13:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 22:13:51,721 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:51,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:51,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1817745427, now seen corresponding path program 1 times [2024-06-21 22:13:51,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:51,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327371141] [2024-06-21 22:13:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:51,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15