./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix015.opt.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/mix015.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix015.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:35:17,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:35:17,619 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:35:17,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:35:17,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:35:17,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:35:17,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:35:17,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:35:17,672 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:35:17,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:35:17,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:35:17,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:35:17,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:35:17,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:35:17,693 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:35:17,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:35:17,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:35:17,695 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:35:17,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:35:17,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:35:17,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:35:17,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:35:17,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:35:17,696 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:35:17,696 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:35:17,697 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:35:17,697 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:35:17,697 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:35:17,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:35:17,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:35:17,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:35:17,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:35:17,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:35:17,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:35:17,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:35:17,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:35:17,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:35:17,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:35:17,699 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:35:17,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:35:17,699 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:35:17,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:35:17,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:35:17,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:35:17,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:35:17,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:35:17,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:35:17,920 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:35:17,920 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:35:17,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix015.opt.yml/witness.yml [2024-06-21 18:35:18,048 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:35:18,049 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:35:18,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-06-21 18:35:19,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:35:19,239 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:35:19,240 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-06-21 18:35:19,251 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1df67856/686b13844bae4f439fa17f43f7306613/FLAG60b68e892 [2024-06-21 18:35:19,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1df67856/686b13844bae4f439fa17f43f7306613 [2024-06-21 18:35:19,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:35:19,264 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:35:19,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:35:19,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:35:19,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:35:19,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:35:18" (1/2) ... [2024-06-21 18:35:19,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5c25a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:35:19, skipping insertion in model container [2024-06-21 18:35:19,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:35:18" (1/2) ... [2024-06-21 18:35:19,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b4c50f0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:35:19, skipping insertion in model container [2024-06-21 18:35:19,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:35:19" (2/2) ... [2024-06-21 18:35:19,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5c25a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19, skipping insertion in model container [2024-06-21 18:35:19,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:35:19" (2/2) ... [2024-06-21 18:35:19,289 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:35:19,309 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:35:19,309 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:35:19,310 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:35:19,310 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:35:19,310 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:35:19,310 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 18:35:19,339 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:35:19,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:35:19,671 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:35:19,849 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:35:19,888 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:35:19,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19 WrapperNode [2024-06-21 18:35:19,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:35:19,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:35:19,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:35:19,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:35:19,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:19,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:19,959 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 18:35:19,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:35:19,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:35:19,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:35:19,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:35:19,970 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:19,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:19,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,004 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:35:20,009 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,021 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,029 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:35:20,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:35:20,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:35:20,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:35:20,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (1/1) ... [2024-06-21 18:35:20,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:35:20,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:35:20,072 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 18:35:20,092 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 18:35:20,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:35:20,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:35:20,104 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:35:20,104 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:35:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:35:20,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:35:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:35:20,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:35:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:35:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:35:20,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:35:20,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:35:20,107 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 18:35:20,234 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:35:20,236 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:35:20,653 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:35:20,655 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:35:20,811 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:35:20,812 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:35:20,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:35:20 BoogieIcfgContainer [2024-06-21 18:35:20,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:35:20,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:35:20,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:35:20,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:35:20,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:35:18" (1/4) ... [2024-06-21 18:35:20,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4391b7cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:35:20, skipping insertion in model container [2024-06-21 18:35:20,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:35:19" (2/4) ... [2024-06-21 18:35:20,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4391b7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:35:20, skipping insertion in model container [2024-06-21 18:35:20,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:35:19" (3/4) ... [2024-06-21 18:35:20,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4391b7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:35:20, skipping insertion in model container [2024-06-21 18:35:20,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:35:20" (4/4) ... [2024-06-21 18:35:20,821 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.opt.i [2024-06-21 18:35:20,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:35:20,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:35:20,834 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:35:20,946 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:35:21,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 18:35:21,048 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 18:35:21,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:35:21,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:35:21,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 18:35:21,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 18:35:21,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:35:21,066 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;@339d4b24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:35:21,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:35:21,070 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:35:21,070 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:35:21,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:35:21,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:21,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:35:21,071 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 18:35:21,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 402627273, now seen corresponding path program 1 times [2024-06-21 18:35:21,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:21,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115690078] [2024-06-21 18:35:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:21,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:22,404 INFO 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 18:35:22,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:22,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115690078] [2024-06-21 18:35:22,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115690078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:22,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:22,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:35:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080057883] [2024-06-21 18:35:22,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:35:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:35:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:35:22,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-21 18:35:22,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:22,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:22,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-21 18:35:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:22,781 INFO L124 PetriNetUnfolderBase]: 1062/1704 cut-off events. [2024-06-21 18:35:22,782 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-21 18:35:22,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 1704 events. 1062/1704 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8773 event pairs, 752 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 3369. Up to 1593 conditions per place. [2024-06-21 18:35:22,794 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 18:35:22,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 177 flow [2024-06-21 18:35:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:35:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:35:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-21 18:35:22,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-21 18:35:22,804 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 84 transitions. [2024-06-21 18:35:22,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 177 flow [2024-06-21 18:35:22,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:35:22,807 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 18:35:22,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 18:35:22,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 18:35:22,811 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 18:35:22,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:22,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:22,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:35:22,812 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 18:35:22,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 377774120, now seen corresponding path program 1 times [2024-06-21 18:35:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253324060] [2024-06-21 18:35:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:23,737 INFO 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 18:35:23,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:23,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253324060] [2024-06-21 18:35:23,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253324060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:23,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:23,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:35:23,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823306597] [2024-06-21 18:35:23,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:23,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:35:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:35:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:35:23,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 18:35:23,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:23,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:23,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 18:35:23,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:24,056 INFO L124 PetriNetUnfolderBase]: 1213/1866 cut-off events. [2024-06-21 18:35:24,057 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-21 18:35:24,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 1866 events. 1213/1866 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9434 event pairs, 629 based on Foata normal form. 5/1867 useless extension candidates. Maximal degree in co-relation 4272. Up to 1782 conditions per place. [2024-06-21 18:35:24,066 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 18:35:24,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 250 flow [2024-06-21 18:35:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:35:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:35:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-21 18:35:24,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.622093023255814 [2024-06-21 18:35:24,068 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 107 transitions. [2024-06-21 18:35:24,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 250 flow [2024-06-21 18:35:24,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:35:24,069 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 18:35:24,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 18:35:24,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 18:35:24,070 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 18:35:24,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:24,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:24,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:24,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:35:24,071 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 18:35:24,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1173903438, now seen corresponding path program 1 times [2024-06-21 18:35:24,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:24,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039744058] [2024-06-21 18:35:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:24,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:35:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039744058] [2024-06-21 18:35:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039744058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:24,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:35:24,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507381378] [2024-06-21 18:35:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:35:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:35:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:35:25,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:35:25,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 18:35:25,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:25,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:35:25,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:25,350 INFO L124 PetriNetUnfolderBase]: 1425/2159 cut-off events. [2024-06-21 18:35:25,350 INFO L125 PetriNetUnfolderBase]: For 1245/1245 co-relation queries the response was YES. [2024-06-21 18:35:25,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5536 conditions, 2159 events. 1425/2159 cut-off events. For 1245/1245 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10637 event pairs, 659 based on Foata normal form. 5/2160 useless extension candidates. Maximal degree in co-relation 5522. Up to 2064 conditions per place. [2024-06-21 18:35:25,360 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-21 18:35:25,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 334 flow [2024-06-21 18:35:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:35:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:35:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 18:35:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953488372093023 [2024-06-21 18:35:25,362 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 128 transitions. [2024-06-21 18:35:25,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 334 flow [2024-06-21 18:35:25,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 320 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:35:25,365 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-21 18:35:25,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 18:35:25,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-21 18:35:25,366 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-21 18:35:25,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 18:35:25,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:25,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:25,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:35:25,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:25,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash -950747879, now seen corresponding path program 1 times [2024-06-21 18:35:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581842655] [2024-06-21 18:35:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:35:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581842655] [2024-06-21 18:35:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581842655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:26,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:35:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765209052] [2024-06-21 18:35:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:35:26,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:35:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:35:26,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:35:26,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:26,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:26,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:35:26,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:26,810 INFO L124 PetriNetUnfolderBase]: 1414/2148 cut-off events. [2024-06-21 18:35:26,810 INFO L125 PetriNetUnfolderBase]: For 2342/2362 co-relation queries the response was YES. [2024-06-21 18:35:26,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6053 conditions, 2148 events. 1414/2148 cut-off events. For 2342/2362 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10681 event pairs, 570 based on Foata normal form. 25/2170 useless extension candidates. Maximal degree in co-relation 6038. Up to 2019 conditions per place. [2024-06-21 18:35:26,821 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-21 18:35:26,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 416 flow [2024-06-21 18:35:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:35:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:35:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 18:35:26,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-21 18:35:26,825 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 152 transitions. [2024-06-21 18:35:26,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 416 flow [2024-06-21 18:35:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 392 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:35:26,830 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-21 18:35:26,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 18:35:26,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 18:35:26,832 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-21 18:35:26,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:26,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:26,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:35:26,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:26,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1455219313, now seen corresponding path program 1 times [2024-06-21 18:35:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:26,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267412155] [2024-06-21 18:35:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:28,036 INFO 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 18:35:28,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267412155] [2024-06-21 18:35:28,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267412155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:28,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:28,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:35:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513968202] [2024-06-21 18:35:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:28,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:35:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:35:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:35:28,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:35:28,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:28,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:28,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:35:28,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:28,606 INFO L124 PetriNetUnfolderBase]: 1812/2727 cut-off events. [2024-06-21 18:35:28,606 INFO L125 PetriNetUnfolderBase]: For 4252/4252 co-relation queries the response was YES. [2024-06-21 18:35:28,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8158 conditions, 2727 events. 1812/2727 cut-off events. For 4252/4252 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13284 event pairs, 496 based on Foata normal form. 7/2732 useless extension candidates. Maximal degree in co-relation 8142. Up to 2478 conditions per place. [2024-06-21 18:35:28,619 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 73 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-21 18:35:28,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 99 transitions, 572 flow [2024-06-21 18:35:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:35:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:35:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:35:28,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-21 18:35:28,622 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:35:28,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 99 transitions, 572 flow [2024-06-21 18:35:28,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 538 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:35:28,628 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 283 flow [2024-06-21 18:35:28,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-21 18:35:28,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 18:35:28,632 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 283 flow [2024-06-21 18:35:28,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:28,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:28,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:28,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:35:28,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:28,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1693552336, now seen corresponding path program 1 times [2024-06-21 18:35:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:28,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318159418] [2024-06-21 18:35:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:28,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:29,868 INFO 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 18:35:29,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318159418] [2024-06-21 18:35:29,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318159418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:29,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:29,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:35:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715946103] [2024-06-21 18:35:29,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:29,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:35:29,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:35:29,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:35:29,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:35:29,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 283 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:29,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:29,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:35:29,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:30,447 INFO L124 PetriNetUnfolderBase]: 1878/2865 cut-off events. [2024-06-21 18:35:30,448 INFO L125 PetriNetUnfolderBase]: For 7054/7054 co-relation queries the response was YES. [2024-06-21 18:35:30,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9343 conditions, 2865 events. 1878/2865 cut-off events. For 7054/7054 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14254 event pairs, 400 based on Foata normal form. 26/2889 useless extension candidates. Maximal degree in co-relation 9326. Up to 2438 conditions per place. [2024-06-21 18:35:30,463 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 81 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-21 18:35:30,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 665 flow [2024-06-21 18:35:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:35:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:35:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 18:35:30,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-21 18:35:30,466 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 283 flow. Second operand 8 states and 200 transitions. [2024-06-21 18:35:30,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 665 flow [2024-06-21 18:35:30,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 109 transitions, 637 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:35:30,470 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 315 flow [2024-06-21 18:35:30,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-21 18:35:30,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 18:35:30,471 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 315 flow [2024-06-21 18:35:30,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:30,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:30,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:30,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:35:30,472 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 18:35:30,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1079308024, now seen corresponding path program 1 times [2024-06-21 18:35:30,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:30,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816733475] [2024-06-21 18:35:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:30,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:32,117 INFO 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 18:35:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816733475] [2024-06-21 18:35:32,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816733475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:32,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:32,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:35:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220417158] [2024-06-21 18:35:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:35:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:35:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:35:32,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:35:32,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:32,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:32,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:35:32,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:32,897 INFO L124 PetriNetUnfolderBase]: 1544/2475 cut-off events. [2024-06-21 18:35:32,897 INFO L125 PetriNetUnfolderBase]: For 7858/7881 co-relation queries the response was YES. [2024-06-21 18:35:32,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8491 conditions, 2475 events. 1544/2475 cut-off events. For 7858/7881 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13150 event pairs, 637 based on Foata normal form. 27/2475 useless extension candidates. Maximal degree in co-relation 8471. Up to 2268 conditions per place. [2024-06-21 18:35:32,918 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-21 18:35:32,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 579 flow [2024-06-21 18:35:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:35:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:35:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:35:32,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:35:32,920 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 315 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:35:32,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 579 flow [2024-06-21 18:35:32,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 527 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:35:32,923 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 387 flow [2024-06-21 18:35:32,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-21 18:35:32,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-21 18:35:32,924 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 387 flow [2024-06-21 18:35:32,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:32,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:32,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:32,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:35:32,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:32,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:32,925 INFO L85 PathProgramCache]: Analyzing trace with hash -685239082, now seen corresponding path program 1 times [2024-06-21 18:35:32,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:32,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837767887] [2024-06-21 18:35:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:35:33,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:33,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837767887] [2024-06-21 18:35:33,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837767887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:33,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:33,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:35:33,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638931832] [2024-06-21 18:35:33,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:33,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:35:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:35:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:35:33,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:35:33,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:33,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:33,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:35:33,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:34,271 INFO L124 PetriNetUnfolderBase]: 1469/2376 cut-off events. [2024-06-21 18:35:34,271 INFO L125 PetriNetUnfolderBase]: For 9891/9965 co-relation queries the response was YES. [2024-06-21 18:35:34,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8713 conditions, 2376 events. 1469/2376 cut-off events. For 9891/9965 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12951 event pairs, 583 based on Foata normal form. 8/2328 useless extension candidates. Maximal degree in co-relation 8688. Up to 2147 conditions per place. [2024-06-21 18:35:34,288 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2024-06-21 18:35:34,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 555 flow [2024-06-21 18:35:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:35:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:35:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-21 18:35:34,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-06-21 18:35:34,294 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 387 flow. Second operand 5 states and 108 transitions. [2024-06-21 18:35:34,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 555 flow [2024-06-21 18:35:34,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 516 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 18:35:34,300 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 419 flow [2024-06-21 18:35:34,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-21 18:35:34,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-21 18:35:34,302 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 419 flow [2024-06-21 18:35:34,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:34,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:34,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:34,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:35:34,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:34,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash 232426522, now seen corresponding path program 1 times [2024-06-21 18:35:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:34,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721123485] [2024-06-21 18:35:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:35:35,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721123485] [2024-06-21 18:35:35,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721123485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:35,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:35,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:35:35,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143797356] [2024-06-21 18:35:35,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:35,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:35:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:35:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:35:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:35:35,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 419 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:35,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:35,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:35:35,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:36,225 INFO L124 PetriNetUnfolderBase]: 1466/2377 cut-off events. [2024-06-21 18:35:36,225 INFO L125 PetriNetUnfolderBase]: For 12320/12412 co-relation queries the response was YES. [2024-06-21 18:35:36,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9388 conditions, 2377 events. 1466/2377 cut-off events. For 12320/12412 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12985 event pairs, 563 based on Foata normal form. 11/2332 useless extension candidates. Maximal degree in co-relation 9362. Up to 2129 conditions per place. [2024-06-21 18:35:36,237 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 50 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-21 18:35:36,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 609 flow [2024-06-21 18:35:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:35:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:35:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 18:35:36,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:35:36,239 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 419 flow. Second operand 7 states and 140 transitions. [2024-06-21 18:35:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 609 flow [2024-06-21 18:35:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 570 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:35:36,244 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 463 flow [2024-06-21 18:35:36,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-21 18:35:36,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-21 18:35:36,245 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 463 flow [2024-06-21 18:35:36,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:36,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:36,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:36,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:35:36,246 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 18:35:36,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1717788027, now seen corresponding path program 1 times [2024-06-21 18:35:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:36,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008087386] [2024-06-21 18:35:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:36,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:38,062 INFO 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 18:35:38,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:38,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008087386] [2024-06-21 18:35:38,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008087386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:38,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:38,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:35:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809978290] [2024-06-21 18:35:38,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:38,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:35:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:35:38,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:35:38,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:35:38,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:38,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:38,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:35:38,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:39,041 INFO L124 PetriNetUnfolderBase]: 1936/2968 cut-off events. [2024-06-21 18:35:39,074 INFO L125 PetriNetUnfolderBase]: For 16162/16162 co-relation queries the response was YES. [2024-06-21 18:35:39,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12378 conditions, 2968 events. 1936/2968 cut-off events. For 16162/16162 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14778 event pairs, 629 based on Foata normal form. 4/2971 useless extension candidates. Maximal degree in co-relation 12351. Up to 2769 conditions per place. [2024-06-21 18:35:39,088 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 97 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-21 18:35:39,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 132 transitions, 999 flow [2024-06-21 18:35:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:35:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:35:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:35:39,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 18:35:39,090 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 463 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:35:39,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 132 transitions, 999 flow [2024-06-21 18:35:39,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 944 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:35:39,097 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 672 flow [2024-06-21 18:35:39,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=672, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-21 18:35:39,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-21 18:35:39,098 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 672 flow [2024-06-21 18:35:39,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:39,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:39,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:39,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:35:39,099 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 18:35:39,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1680781077, now seen corresponding path program 1 times [2024-06-21 18:35:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752099561] [2024-06-21 18:35:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:40,782 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 18:35:40,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752099561] [2024-06-21 18:35:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752099561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:40,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:40,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:35:40,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675277753] [2024-06-21 18:35:40,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:40,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:35:40,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:40,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:35:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:35:40,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:35:40,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 672 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:35:40,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:41,672 INFO L124 PetriNetUnfolderBase]: 1896/2976 cut-off events. [2024-06-21 18:35:41,672 INFO L125 PetriNetUnfolderBase]: For 19235/19254 co-relation queries the response was YES. [2024-06-21 18:35:41,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 2976 events. 1896/2976 cut-off events. For 19235/19254 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15377 event pairs, 615 based on Foata normal form. 21/2995 useless extension candidates. Maximal degree in co-relation 12812. Up to 2703 conditions per place. [2024-06-21 18:35:41,694 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 30 changer transitions 0/135 dead transitions. [2024-06-21 18:35:41,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 135 transitions, 1112 flow [2024-06-21 18:35:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:35:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:35:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:35:41,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 18:35:41,696 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 672 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:35:41,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 135 transitions, 1112 flow [2024-06-21 18:35:41,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1070 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 18:35:41,711 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 813 flow [2024-06-21 18:35:41,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=813, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2024-06-21 18:35:41,712 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-21 18:35:41,712 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 813 flow [2024-06-21 18:35:41,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:41,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:41,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:41,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:35:41,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:41,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1385172137, now seen corresponding path program 1 times [2024-06-21 18:35:41,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:41,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378153161] [2024-06-21 18:35:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:42,722 INFO 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 18:35:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378153161] [2024-06-21 18:35:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378153161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:35:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124067722] [2024-06-21 18:35:42,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:42,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:35:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:35:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:35:42,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:35:42,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 813 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:42,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:42,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:35:42,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:43,311 INFO L124 PetriNetUnfolderBase]: 1802/2872 cut-off events. [2024-06-21 18:35:43,311 INFO L125 PetriNetUnfolderBase]: For 21669/21696 co-relation queries the response was YES. [2024-06-21 18:35:43,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12825 conditions, 2872 events. 1802/2872 cut-off events. For 21669/21696 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15101 event pairs, 611 based on Foata normal form. 26/2889 useless extension candidates. Maximal degree in co-relation 12786. Up to 2606 conditions per place. [2024-06-21 18:35:43,330 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 87 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-21 18:35:43,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 1147 flow [2024-06-21 18:35:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:35:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:35:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 18:35:43,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 18:35:43,331 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 813 flow. Second operand 7 states and 136 transitions. [2024-06-21 18:35:43,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 1147 flow [2024-06-21 18:35:43,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1082 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 18:35:43,346 INFO L231 Difference]: Finished difference. Result has 97 places, 117 transitions, 919 flow [2024-06-21 18:35:43,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=97, PETRI_TRANSITIONS=117} [2024-06-21 18:35:43,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 18:35:43,348 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 117 transitions, 919 flow [2024-06-21 18:35:43,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:43,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:43,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:43,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:35:43,348 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 18:35:43,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:43,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1945440491, now seen corresponding path program 2 times [2024-06-21 18:35:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:43,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352210436] [2024-06-21 18:35:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:43,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:45,459 INFO 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 18:35:45,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352210436] [2024-06-21 18:35:45,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352210436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:45,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:45,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:35:45,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803702516] [2024-06-21 18:35:45,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:45,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:35:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:45,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:35:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:35:45,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:35:45,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 117 transitions, 919 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:45,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:45,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:35:45,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:46,405 INFO L124 PetriNetUnfolderBase]: 1934/3034 cut-off events. [2024-06-21 18:35:46,405 INFO L125 PetriNetUnfolderBase]: For 25678/25699 co-relation queries the response was YES. [2024-06-21 18:35:46,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14190 conditions, 3034 events. 1934/3034 cut-off events. For 25678/25699 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15688 event pairs, 604 based on Foata normal form. 23/3056 useless extension candidates. Maximal degree in co-relation 14147. Up to 2756 conditions per place. [2024-06-21 18:35:46,425 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-06-21 18:35:46,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 147 transitions, 1326 flow [2024-06-21 18:35:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:35:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:35:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:35:46,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:35:46,427 INFO L175 Difference]: Start difference. First operand has 97 places, 117 transitions, 919 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:35:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 147 transitions, 1326 flow [2024-06-21 18:35:46,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 147 transitions, 1290 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 18:35:46,450 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1055 flow [2024-06-21 18:35:46,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1055, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-21 18:35:46,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-21 18:35:46,451 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1055 flow [2024-06-21 18:35:46,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:46,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:46,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:46,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:35:46,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:46,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:46,452 INFO L85 PathProgramCache]: Analyzing trace with hash -280238285, now seen corresponding path program 3 times [2024-06-21 18:35:46,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:46,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019021632] [2024-06-21 18:35:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:46,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:48,178 INFO 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 18:35:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019021632] [2024-06-21 18:35:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019021632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:48,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:48,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:35:48,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966309678] [2024-06-21 18:35:48,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:48,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:35:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:35:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:35:48,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:35:48,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1055 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:48,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:48,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:35:48,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:49,135 INFO L124 PetriNetUnfolderBase]: 1951/3061 cut-off events. [2024-06-21 18:35:49,135 INFO L125 PetriNetUnfolderBase]: For 28452/28473 co-relation queries the response was YES. [2024-06-21 18:35:49,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 3061 events. 1951/3061 cut-off events. For 28452/28473 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15852 event pairs, 609 based on Foata normal form. 23/3083 useless extension candidates. Maximal degree in co-relation 14497. Up to 2783 conditions per place. [2024-06-21 18:35:49,158 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 41 changer transitions 0/149 dead transitions. [2024-06-21 18:35:49,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 149 transitions, 1425 flow [2024-06-21 18:35:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:35:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:35:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:35:49,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:35:49,160 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1055 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:35:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 149 transitions, 1425 flow [2024-06-21 18:35:49,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1332 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:35:49,179 INFO L231 Difference]: Finished difference. Result has 109 places, 126 transitions, 1085 flow [2024-06-21 18:35:49,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1085, PETRI_PLACES=109, PETRI_TRANSITIONS=126} [2024-06-21 18:35:49,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-21 18:35:49,180 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 126 transitions, 1085 flow [2024-06-21 18:35:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:49,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:49,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:35:49,181 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:49,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1732664119, now seen corresponding path program 4 times [2024-06-21 18:35:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117670433] [2024-06-21 18:35:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:35:50,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:50,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117670433] [2024-06-21 18:35:50,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117670433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:50,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:50,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:35:50,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019122409] [2024-06-21 18:35:50,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:50,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:35:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:50,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:35:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:35:50,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:35:50,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 126 transitions, 1085 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:50,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:50,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:35:50,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:51,543 INFO L124 PetriNetUnfolderBase]: 1968/3087 cut-off events. [2024-06-21 18:35:51,543 INFO L125 PetriNetUnfolderBase]: For 32463/32484 co-relation queries the response was YES. [2024-06-21 18:35:51,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15005 conditions, 3087 events. 1968/3087 cut-off events. For 32463/32484 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16000 event pairs, 568 based on Foata normal form. 23/3109 useless extension candidates. Maximal degree in co-relation 14961. Up to 2709 conditions per place. [2024-06-21 18:35:51,562 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 98 selfloop transitions, 50 changer transitions 0/156 dead transitions. [2024-06-21 18:35:51,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 156 transitions, 1563 flow [2024-06-21 18:35:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:35:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:35:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:35:51,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 18:35:51,566 INFO L175 Difference]: Start difference. First operand has 109 places, 126 transitions, 1085 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:35:51,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 156 transitions, 1563 flow [2024-06-21 18:35:51,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 156 transitions, 1462 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 18:35:51,589 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1163 flow [2024-06-21 18:35:51,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1163, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-21 18:35:51,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 18:35:51,590 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1163 flow [2024-06-21 18:35:51,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:51,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:51,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:35:51,591 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:51,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -27150797, now seen corresponding path program 2 times [2024-06-21 18:35:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:51,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314974732] [2024-06-21 18:35:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:52,695 INFO 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 18:35:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314974732] [2024-06-21 18:35:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314974732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:35:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220054639] [2024-06-21 18:35:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:35:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:35:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:35:52,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:35:52,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1163 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:52,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:52,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:35:52,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:53,300 INFO L124 PetriNetUnfolderBase]: 1864/2974 cut-off events. [2024-06-21 18:35:53,300 INFO L125 PetriNetUnfolderBase]: For 36153/36183 co-relation queries the response was YES. [2024-06-21 18:35:53,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14739 conditions, 2974 events. 1864/2974 cut-off events. For 36153/36183 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15658 event pairs, 613 based on Foata normal form. 30/2997 useless extension candidates. Maximal degree in co-relation 14696. Up to 2686 conditions per place. [2024-06-21 18:35:53,319 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-06-21 18:35:53,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 147 transitions, 1539 flow [2024-06-21 18:35:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:35:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:35:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 18:35:53,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-21 18:35:53,321 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1163 flow. Second operand 7 states and 134 transitions. [2024-06-21 18:35:53,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 147 transitions, 1539 flow [2024-06-21 18:35:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 147 transitions, 1459 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:35:53,377 INFO L231 Difference]: Finished difference. Result has 115 places, 138 transitions, 1247 flow [2024-06-21 18:35:53,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1247, PETRI_PLACES=115, PETRI_TRANSITIONS=138} [2024-06-21 18:35:53,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-21 18:35:53,377 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 138 transitions, 1247 flow [2024-06-21 18:35:53,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:53,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:53,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:53,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:35:53,378 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 18:35:53,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1891049869, now seen corresponding path program 2 times [2024-06-21 18:35:53,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:53,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981083544] [2024-06-21 18:35:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:54,848 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 18:35:54,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981083544] [2024-06-21 18:35:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981083544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:54,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:35:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155960164] [2024-06-21 18:35:54,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:54,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:35:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:35:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:35:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:35:54,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 138 transitions, 1247 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:54,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:54,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:35:54,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:55,955 INFO L124 PetriNetUnfolderBase]: 2200/3384 cut-off events. [2024-06-21 18:35:55,955 INFO L125 PetriNetUnfolderBase]: For 40540/40544 co-relation queries the response was YES. [2024-06-21 18:35:55,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17281 conditions, 3384 events. 2200/3384 cut-off events. For 40540/40544 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17043 event pairs, 603 based on Foata normal form. 8/3391 useless extension candidates. Maximal degree in co-relation 17235. Up to 3095 conditions per place. [2024-06-21 18:35:55,983 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 148 selfloop transitions, 62 changer transitions 0/215 dead transitions. [2024-06-21 18:35:55,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 215 transitions, 2126 flow [2024-06-21 18:35:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:35:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:35:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:35:55,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:35:55,986 INFO L175 Difference]: Start difference. First operand has 115 places, 138 transitions, 1247 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:35:55,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 215 transitions, 2126 flow [2024-06-21 18:35:56,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 215 transitions, 2072 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 18:35:56,025 INFO L231 Difference]: Finished difference. Result has 126 places, 173 transitions, 1704 flow [2024-06-21 18:35:56,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1704, PETRI_PLACES=126, PETRI_TRANSITIONS=173} [2024-06-21 18:35:56,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 18:35:56,025 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 173 transitions, 1704 flow [2024-06-21 18:35:56,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:56,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:56,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:56,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:35:56,026 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 18:35:56,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2109387799, now seen corresponding path program 3 times [2024-06-21 18:35:56,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:56,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884143201] [2024-06-21 18:35:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:56,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:56,971 INFO 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 18:35:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884143201] [2024-06-21 18:35:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884143201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:56,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:56,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:35:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444554874] [2024-06-21 18:35:56,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:56,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:35:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:35:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:35:57,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:35:57,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 173 transitions, 1704 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:57,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:57,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:35:57,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:58,099 INFO L124 PetriNetUnfolderBase]: 2372/3677 cut-off events. [2024-06-21 18:35:58,100 INFO L125 PetriNetUnfolderBase]: For 46396/46408 co-relation queries the response was YES. [2024-06-21 18:35:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19389 conditions, 3677 events. 2372/3677 cut-off events. For 46396/46408 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19062 event pairs, 608 based on Foata normal form. 16/3692 useless extension candidates. Maximal degree in co-relation 19337. Up to 3182 conditions per place. [2024-06-21 18:35:58,127 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 158 selfloop transitions, 122 changer transitions 0/285 dead transitions. [2024-06-21 18:35:58,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 285 transitions, 3120 flow [2024-06-21 18:35:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 18:35:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 18:35:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 271 transitions. [2024-06-21 18:35:58,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45016611295681064 [2024-06-21 18:35:58,129 INFO L175 Difference]: Start difference. First operand has 126 places, 173 transitions, 1704 flow. Second operand 14 states and 271 transitions. [2024-06-21 18:35:58,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 285 transitions, 3120 flow [2024-06-21 18:35:58,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 285 transitions, 2973 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 18:35:58,174 INFO L231 Difference]: Finished difference. Result has 141 places, 226 transitions, 2533 flow [2024-06-21 18:35:58,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2533, PETRI_PLACES=141, PETRI_TRANSITIONS=226} [2024-06-21 18:35:58,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-21 18:35:58,175 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 226 transitions, 2533 flow [2024-06-21 18:35:58,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:58,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:58,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:35:58,176 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 18:35:58,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2033026995, now seen corresponding path program 4 times [2024-06-21 18:35:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:58,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330467910] [2024-06-21 18:35:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:59,436 INFO 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 18:35:59,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330467910] [2024-06-21 18:35:59,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330467910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:59,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:59,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:35:59,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761805348] [2024-06-21 18:35:59,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:59,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:35:59,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:35:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:35:59,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:35:59,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 226 transitions, 2533 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:59,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:59,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:35:59,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:00,607 INFO L124 PetriNetUnfolderBase]: 2511/3896 cut-off events. [2024-06-21 18:36:00,608 INFO L125 PetriNetUnfolderBase]: For 58533/58539 co-relation queries the response was YES. [2024-06-21 18:36:00,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21927 conditions, 3896 events. 2511/3896 cut-off events. For 58533/58539 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20482 event pairs, 638 based on Foata normal form. 12/3907 useless extension candidates. Maximal degree in co-relation 21870. Up to 3458 conditions per place. [2024-06-21 18:36:00,637 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 185 selfloop transitions, 119 changer transitions 0/309 dead transitions. [2024-06-21 18:36:00,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 309 transitions, 3899 flow [2024-06-21 18:36:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:36:00,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:36:00,639 INFO L175 Difference]: Start difference. First operand has 141 places, 226 transitions, 2533 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:36:00,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 309 transitions, 3899 flow [2024-06-21 18:36:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 309 transitions, 3717 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-21 18:36:00,701 INFO L231 Difference]: Finished difference. Result has 150 places, 273 transitions, 3379 flow [2024-06-21 18:36:00,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3379, PETRI_PLACES=150, PETRI_TRANSITIONS=273} [2024-06-21 18:36:00,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-21 18:36:00,702 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 273 transitions, 3379 flow [2024-06-21 18:36:00,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:00,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:00,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:00,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:36:00,703 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 18:36:00,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1150334119, now seen corresponding path program 5 times [2024-06-21 18:36:00,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:00,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107359606] [2024-06-21 18:36:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:00,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:01,782 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 18:36:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:01,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107359606] [2024-06-21 18:36:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107359606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:01,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:01,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758689163] [2024-06-21 18:36:01,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:01,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:01,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 273 transitions, 3379 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:01,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:01,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:02,817 INFO L124 PetriNetUnfolderBase]: 2565/3993 cut-off events. [2024-06-21 18:36:02,818 INFO L125 PetriNetUnfolderBase]: For 64068/64074 co-relation queries the response was YES. [2024-06-21 18:36:02,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23269 conditions, 3993 events. 2565/3993 cut-off events. For 64068/64074 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21201 event pairs, 633 based on Foata normal form. 12/4004 useless extension candidates. Maximal degree in co-relation 23209. Up to 3522 conditions per place. [2024-06-21 18:36:02,851 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 189 selfloop transitions, 131 changer transitions 0/325 dead transitions. [2024-06-21 18:36:02,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 325 transitions, 4414 flow [2024-06-21 18:36:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:36:02,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:36:02,853 INFO L175 Difference]: Start difference. First operand has 150 places, 273 transitions, 3379 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:36:02,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 325 transitions, 4414 flow [2024-06-21 18:36:02,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 325 transitions, 4138 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 18:36:02,931 INFO L231 Difference]: Finished difference. Result has 156 places, 288 transitions, 3709 flow [2024-06-21 18:36:02,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3709, PETRI_PLACES=156, PETRI_TRANSITIONS=288} [2024-06-21 18:36:02,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 18:36:02,932 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 288 transitions, 3709 flow [2024-06-21 18:36:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:02,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:02,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:36:02,932 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:02,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1782537459, now seen corresponding path program 5 times [2024-06-21 18:36:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:02,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139808781] [2024-06-21 18:36:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:04,338 INFO 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 18:36:04,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139808781] [2024-06-21 18:36:04,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139808781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:04,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:36:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845528372] [2024-06-21 18:36:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:36:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:36:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:36:04,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:36:04,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 288 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:04,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:04,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:36:04,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:05,428 INFO L124 PetriNetUnfolderBase]: 2522/3967 cut-off events. [2024-06-21 18:36:05,428 INFO L125 PetriNetUnfolderBase]: For 69305/69325 co-relation queries the response was YES. [2024-06-21 18:36:05,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23512 conditions, 3967 events. 2522/3967 cut-off events. For 69305/69325 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 21531 event pairs, 699 based on Foata normal form. 24/3983 useless extension candidates. Maximal degree in co-relation 23450. Up to 3559 conditions per place. [2024-06-21 18:36:05,462 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 263 selfloop transitions, 64 changer transitions 0/341 dead transitions. [2024-06-21 18:36:05,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 341 transitions, 4741 flow [2024-06-21 18:36:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:36:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:36:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 18:36:05,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-21 18:36:05,463 INFO L175 Difference]: Start difference. First operand has 156 places, 288 transitions, 3709 flow. Second operand 9 states and 183 transitions. [2024-06-21 18:36:05,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 341 transitions, 4741 flow [2024-06-21 18:36:05,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 341 transitions, 4597 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 18:36:05,540 INFO L231 Difference]: Finished difference. Result has 163 places, 310 transitions, 3976 flow [2024-06-21 18:36:05,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3976, PETRI_PLACES=163, PETRI_TRANSITIONS=310} [2024-06-21 18:36:05,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-21 18:36:05,541 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 310 transitions, 3976 flow [2024-06-21 18:36:05,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:05,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:05,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:05,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:36:05,542 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 18:36:05,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1035338055, now seen corresponding path program 3 times [2024-06-21 18:36:05,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:05,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069147974] [2024-06-21 18:36:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:05,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:36:06,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:06,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069147974] [2024-06-21 18:36:06,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069147974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:06,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:06,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:36:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921920538] [2024-06-21 18:36:06,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:06,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:36:06,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:36:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:36:06,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:36:06,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 310 transitions, 3976 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:06,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:06,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:36:06,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:07,069 INFO L124 PetriNetUnfolderBase]: 2363/3764 cut-off events. [2024-06-21 18:36:07,070 INFO L125 PetriNetUnfolderBase]: For 73787/73876 co-relation queries the response was YES. [2024-06-21 18:36:07,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22601 conditions, 3764 events. 2363/3764 cut-off events. For 73787/73876 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20627 event pairs, 660 based on Foata normal form. 90/3816 useless extension candidates. Maximal degree in co-relation 22536. Up to 3347 conditions per place. [2024-06-21 18:36:07,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 240 selfloop transitions, 42 changer transitions 0/333 dead transitions. [2024-06-21 18:36:07,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 333 transitions, 4669 flow [2024-06-21 18:36:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:36:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:36:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 18:36:07,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 18:36:07,107 INFO L175 Difference]: Start difference. First operand has 163 places, 310 transitions, 3976 flow. Second operand 7 states and 143 transitions. [2024-06-21 18:36:07,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 333 transitions, 4669 flow [2024-06-21 18:36:07,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 333 transitions, 4378 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 18:36:07,201 INFO L231 Difference]: Finished difference. Result has 162 places, 316 transitions, 3865 flow [2024-06-21 18:36:07,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3865, PETRI_PLACES=162, PETRI_TRANSITIONS=316} [2024-06-21 18:36:07,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-21 18:36:07,201 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 316 transitions, 3865 flow [2024-06-21 18:36:07,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:07,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:07,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:07,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:36:07,202 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 18:36:07,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash 830504675, now seen corresponding path program 1 times [2024-06-21 18:36:07,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:07,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938705920] [2024-06-21 18:36:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:07,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:36:08,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:08,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938705920] [2024-06-21 18:36:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938705920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:08,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:08,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:08,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269982079] [2024-06-21 18:36:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:08,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:08,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:09,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:09,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 316 transitions, 3865 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:09,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:09,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:09,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:10,131 INFO L124 PetriNetUnfolderBase]: 2682/4194 cut-off events. [2024-06-21 18:36:10,131 INFO L125 PetriNetUnfolderBase]: For 78341/78345 co-relation queries the response was YES. [2024-06-21 18:36:10,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24534 conditions, 4194 events. 2682/4194 cut-off events. For 78341/78345 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22681 event pairs, 684 based on Foata normal form. 8/4200 useless extension candidates. Maximal degree in co-relation 24469. Up to 3669 conditions per place. [2024-06-21 18:36:10,171 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 81 changer transitions 0/357 dead transitions. [2024-06-21 18:36:10,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 357 transitions, 4810 flow [2024-06-21 18:36:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 18:36:10,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 18:36:10,173 INFO L175 Difference]: Start difference. First operand has 162 places, 316 transitions, 3865 flow. Second operand 10 states and 188 transitions. [2024-06-21 18:36:10,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 357 transitions, 4810 flow [2024-06-21 18:36:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 357 transitions, 4766 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 18:36:10,285 INFO L231 Difference]: Finished difference. Result has 170 places, 327 transitions, 4093 flow [2024-06-21 18:36:10,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4093, PETRI_PLACES=170, PETRI_TRANSITIONS=327} [2024-06-21 18:36:10,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-21 18:36:10,286 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 327 transitions, 4093 flow [2024-06-21 18:36:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:10,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:10,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:10,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:36:10,286 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 18:36:10,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1882723969, now seen corresponding path program 2 times [2024-06-21 18:36:10,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:10,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184382480] [2024-06-21 18:36:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:36:11,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:11,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184382480] [2024-06-21 18:36:11,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184382480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:11,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:11,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:11,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198752983] [2024-06-21 18:36:11,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:11,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:11,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:12,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:12,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 327 transitions, 4093 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:12,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:12,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:12,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:13,256 INFO L124 PetriNetUnfolderBase]: 2732/4274 cut-off events. [2024-06-21 18:36:13,257 INFO L125 PetriNetUnfolderBase]: For 85761/85765 co-relation queries the response was YES. [2024-06-21 18:36:13,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25728 conditions, 4274 events. 2732/4274 cut-off events. For 85761/85765 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23228 event pairs, 681 based on Foata normal form. 8/4280 useless extension candidates. Maximal degree in co-relation 25661. Up to 3727 conditions per place. [2024-06-21 18:36:13,295 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 282 selfloop transitions, 81 changer transitions 0/368 dead transitions. [2024-06-21 18:36:13,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 368 transitions, 5096 flow [2024-06-21 18:36:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 18:36:13,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 18:36:13,297 INFO L175 Difference]: Start difference. First operand has 170 places, 327 transitions, 4093 flow. Second operand 10 states and 189 transitions. [2024-06-21 18:36:13,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 368 transitions, 5096 flow [2024-06-21 18:36:13,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 368 transitions, 4934 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 18:36:13,417 INFO L231 Difference]: Finished difference. Result has 177 places, 336 transitions, 4210 flow [2024-06-21 18:36:13,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4210, PETRI_PLACES=177, PETRI_TRANSITIONS=336} [2024-06-21 18:36:13,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 18:36:13,418 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 336 transitions, 4210 flow [2024-06-21 18:36:13,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:13,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:13,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:13,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:36:13,419 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 18:36:13,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash -564873155, now seen corresponding path program 3 times [2024-06-21 18:36:13,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:13,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411528188] [2024-06-21 18:36:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:15,023 INFO 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 18:36:15,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411528188] [2024-06-21 18:36:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411528188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:15,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:15,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:15,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632547476] [2024-06-21 18:36:15,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:15,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:15,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:15,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 336 transitions, 4210 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:15,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:15,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:16,413 INFO L124 PetriNetUnfolderBase]: 2749/4296 cut-off events. [2024-06-21 18:36:16,413 INFO L125 PetriNetUnfolderBase]: For 93319/93323 co-relation queries the response was YES. [2024-06-21 18:36:16,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26437 conditions, 4296 events. 2749/4296 cut-off events. For 93319/93323 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 23342 event pairs, 686 based on Foata normal form. 8/4302 useless extension candidates. Maximal degree in co-relation 26368. Up to 3754 conditions per place. [2024-06-21 18:36:16,446 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 283 selfloop transitions, 84 changer transitions 0/372 dead transitions. [2024-06-21 18:36:16,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 372 transitions, 5190 flow [2024-06-21 18:36:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 18:36:16,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 18:36:16,448 INFO L175 Difference]: Start difference. First operand has 177 places, 336 transitions, 4210 flow. Second operand 10 states and 188 transitions. [2024-06-21 18:36:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 372 transitions, 5190 flow [2024-06-21 18:36:16,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 372 transitions, 5024 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:36:16,577 INFO L231 Difference]: Finished difference. Result has 182 places, 340 transitions, 4282 flow [2024-06-21 18:36:16,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4282, PETRI_PLACES=182, PETRI_TRANSITIONS=340} [2024-06-21 18:36:16,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-21 18:36:16,578 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 340 transitions, 4282 flow [2024-06-21 18:36:16,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:16,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:16,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:16,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:36:16,579 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:16,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash -564604385, now seen corresponding path program 4 times [2024-06-21 18:36:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:16,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628449983] [2024-06-21 18:36:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:18,522 INFO 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 18:36:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628449983] [2024-06-21 18:36:18,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628449983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:18,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:18,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721945746] [2024-06-21 18:36:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:18,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:18,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 340 transitions, 4282 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:18,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:18,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:18,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:19,821 INFO L124 PetriNetUnfolderBase]: 2766/4328 cut-off events. [2024-06-21 18:36:19,821 INFO L125 PetriNetUnfolderBase]: For 100254/100258 co-relation queries the response was YES. [2024-06-21 18:36:19,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26941 conditions, 4328 events. 2766/4328 cut-off events. For 100254/100258 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 23587 event pairs, 677 based on Foata normal form. 8/4334 useless extension candidates. Maximal degree in co-relation 26871. Up to 3685 conditions per place. [2024-06-21 18:36:19,859 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 279 selfloop transitions, 91 changer transitions 0/375 dead transitions. [2024-06-21 18:36:19,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 375 transitions, 5251 flow [2024-06-21 18:36:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 18:36:19,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 18:36:19,861 INFO L175 Difference]: Start difference. First operand has 182 places, 340 transitions, 4282 flow. Second operand 10 states and 189 transitions. [2024-06-21 18:36:19,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 375 transitions, 5251 flow [2024-06-21 18:36:19,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 375 transitions, 5077 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:36:19,986 INFO L231 Difference]: Finished difference. Result has 186 places, 342 transitions, 4342 flow [2024-06-21 18:36:19,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4342, PETRI_PLACES=186, PETRI_TRANSITIONS=342} [2024-06-21 18:36:19,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-21 18:36:19,986 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 342 transitions, 4342 flow [2024-06-21 18:36:19,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:19,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:19,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:36:19,987 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 18:36:19,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash -390517497, now seen corresponding path program 1 times [2024-06-21 18:36:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579374634] [2024-06-21 18:36:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:20,908 INFO 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 18:36:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579374634] [2024-06-21 18:36:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579374634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:20,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:20,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:36:20,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725577053] [2024-06-21 18:36:20,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:20,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:36:20,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:36:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:36:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:36:20,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 342 transitions, 4342 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:20,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:20,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:36:20,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:21,863 INFO L124 PetriNetUnfolderBase]: 2624/4151 cut-off events. [2024-06-21 18:36:21,864 INFO L125 PetriNetUnfolderBase]: For 106341/106393 co-relation queries the response was YES. [2024-06-21 18:36:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26446 conditions, 4151 events. 2624/4151 cut-off events. For 106341/106393 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22873 event pairs, 637 based on Foata normal form. 53/4177 useless extension candidates. Maximal degree in co-relation 26375. Up to 3676 conditions per place. [2024-06-21 18:36:21,896 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 60 changer transitions 0/367 dead transitions. [2024-06-21 18:36:21,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 367 transitions, 5160 flow [2024-06-21 18:36:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:36:21,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 18:36:21,897 INFO L175 Difference]: Start difference. First operand has 186 places, 342 transitions, 4342 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:36:21,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 367 transitions, 5160 flow [2024-06-21 18:36:22,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 367 transitions, 4938 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 18:36:22,029 INFO L231 Difference]: Finished difference. Result has 188 places, 351 transitions, 4407 flow [2024-06-21 18:36:22,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4407, PETRI_PLACES=188, PETRI_TRANSITIONS=351} [2024-06-21 18:36:22,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-21 18:36:22,030 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 351 transitions, 4407 flow [2024-06-21 18:36:22,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:22,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:22,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:22,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:36:22,031 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 18:36:22,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -390159013, now seen corresponding path program 1 times [2024-06-21 18:36:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:22,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495730030] [2024-06-21 18:36:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:23,463 INFO 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 18:36:23,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:23,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495730030] [2024-06-21 18:36:23,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495730030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:23,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:23,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:36:23,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689147176] [2024-06-21 18:36:23,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:36:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:23,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:36:23,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:36:23,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:36:23,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 351 transitions, 4407 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:23,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:23,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:36:23,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:24,367 INFO L124 PetriNetUnfolderBase]: 2542/4038 cut-off events. [2024-06-21 18:36:24,368 INFO L125 PetriNetUnfolderBase]: For 113744/113833 co-relation queries the response was YES. [2024-06-21 18:36:24,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26268 conditions, 4038 events. 2542/4038 cut-off events. For 113744/113833 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22370 event pairs, 650 based on Foata normal form. 91/4089 useless extension candidates. Maximal degree in co-relation 26194. Up to 3436 conditions per place. [2024-06-21 18:36:24,410 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 67 changer transitions 0/371 dead transitions. [2024-06-21 18:36:24,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 371 transitions, 5213 flow [2024-06-21 18:36:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:36:24,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 18:36:24,412 INFO L175 Difference]: Start difference. First operand has 188 places, 351 transitions, 4407 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:36:24,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 371 transitions, 5213 flow [2024-06-21 18:36:24,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 371 transitions, 5141 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 18:36:24,539 INFO L231 Difference]: Finished difference. Result has 194 places, 358 transitions, 4601 flow [2024-06-21 18:36:24,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=194, PETRI_TRANSITIONS=358} [2024-06-21 18:36:24,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-21 18:36:24,544 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 358 transitions, 4601 flow [2024-06-21 18:36:24,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:24,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:24,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:36:24,545 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 18:36:24,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -390159447, now seen corresponding path program 2 times [2024-06-21 18:36:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:24,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745791707] [2024-06-21 18:36:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:25,630 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 18:36:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745791707] [2024-06-21 18:36:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745791707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:36:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750789880] [2024-06-21 18:36:25,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:36:25,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:36:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:36:25,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:36:25,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 358 transitions, 4601 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:25,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:25,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:36:25,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:26,617 INFO L124 PetriNetUnfolderBase]: 2655/4195 cut-off events. [2024-06-21 18:36:26,618 INFO L125 PetriNetUnfolderBase]: For 121109/121163 co-relation queries the response was YES. [2024-06-21 18:36:26,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28121 conditions, 4195 events. 2655/4195 cut-off events. For 121109/121163 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23164 event pairs, 634 based on Foata normal form. 55/4223 useless extension candidates. Maximal degree in co-relation 28044. Up to 3693 conditions per place. [2024-06-21 18:36:26,657 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 270 selfloop transitions, 62 changer transitions 0/374 dead transitions. [2024-06-21 18:36:26,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 374 transitions, 5363 flow [2024-06-21 18:36:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:36:26,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 18:36:26,659 INFO L175 Difference]: Start difference. First operand has 194 places, 358 transitions, 4601 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:36:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 374 transitions, 5363 flow [2024-06-21 18:36:26,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 374 transitions, 5261 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:36:26,805 INFO L231 Difference]: Finished difference. Result has 198 places, 361 transitions, 4676 flow [2024-06-21 18:36:26,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=198, PETRI_TRANSITIONS=361} [2024-06-21 18:36:26,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 18:36:26,806 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 361 transitions, 4676 flow [2024-06-21 18:36:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:36:26,806 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:26,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 427007135, now seen corresponding path program 5 times [2024-06-21 18:36:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:26,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367871403] [2024-06-21 18:36:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:28,531 INFO 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 18:36:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367871403] [2024-06-21 18:36:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367871403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:28,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065888783] [2024-06-21 18:36:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:28,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:28,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 361 transitions, 4676 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:28,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:28,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:28,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:29,827 INFO L124 PetriNetUnfolderBase]: 2839/4433 cut-off events. [2024-06-21 18:36:29,827 INFO L125 PetriNetUnfolderBase]: For 129466/129472 co-relation queries the response was YES. [2024-06-21 18:36:29,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30114 conditions, 4433 events. 2839/4433 cut-off events. For 129466/129472 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 24189 event pairs, 665 based on Foata normal form. 10/4442 useless extension candidates. Maximal degree in co-relation 30035. Up to 3883 conditions per place. [2024-06-21 18:36:29,876 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 289 selfloop transitions, 99 changer transitions 0/393 dead transitions. [2024-06-21 18:36:29,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 393 transitions, 5665 flow [2024-06-21 18:36:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:36:29,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-21 18:36:29,878 INFO L175 Difference]: Start difference. First operand has 198 places, 361 transitions, 4676 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:36:29,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 393 transitions, 5665 flow [2024-06-21 18:36:30,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 393 transitions, 5532 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 18:36:30,171 INFO L231 Difference]: Finished difference. Result has 203 places, 366 transitions, 4830 flow [2024-06-21 18:36:30,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4830, PETRI_PLACES=203, PETRI_TRANSITIONS=366} [2024-06-21 18:36:30,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-21 18:36:30,172 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 366 transitions, 4830 flow [2024-06-21 18:36:30,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:30,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:30,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:30,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:36:30,173 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:30,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -647663907, now seen corresponding path program 6 times [2024-06-21 18:36:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028536282] [2024-06-21 18:36:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:31,756 INFO 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 18:36:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028536282] [2024-06-21 18:36:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028536282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:31,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299521499] [2024-06-21 18:36:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:31,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:31,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 366 transitions, 4830 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:31,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:31,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:33,103 INFO L124 PetriNetUnfolderBase]: 2867/4481 cut-off events. [2024-06-21 18:36:33,103 INFO L125 PetriNetUnfolderBase]: For 138575/138581 co-relation queries the response was YES. [2024-06-21 18:36:33,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30913 conditions, 4481 events. 2867/4481 cut-off events. For 138575/138581 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24604 event pairs, 670 based on Foata normal form. 10/4490 useless extension candidates. Maximal degree in co-relation 30833. Up to 3922 conditions per place. [2024-06-21 18:36:33,153 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 301 selfloop transitions, 95 changer transitions 0/401 dead transitions. [2024-06-21 18:36:33,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 401 transitions, 5878 flow [2024-06-21 18:36:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 18:36:33,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-21 18:36:33,155 INFO L175 Difference]: Start difference. First operand has 203 places, 366 transitions, 4830 flow. Second operand 10 states and 186 transitions. [2024-06-21 18:36:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 401 transitions, 5878 flow [2024-06-21 18:36:33,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 401 transitions, 5642 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 18:36:33,346 INFO L231 Difference]: Finished difference. Result has 206 places, 371 transitions, 4883 flow [2024-06-21 18:36:33,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4883, PETRI_PLACES=206, PETRI_TRANSITIONS=371} [2024-06-21 18:36:33,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-21 18:36:33,347 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 371 transitions, 4883 flow [2024-06-21 18:36:33,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:33,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:33,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:36:33,347 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:33,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash -97450793, now seen corresponding path program 7 times [2024-06-21 18:36:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:33,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698779597] [2024-06-21 18:36:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:36:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698779597] [2024-06-21 18:36:35,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698779597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:35,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:35,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:35,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068926960] [2024-06-21 18:36:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:35,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:35,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:35,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 371 transitions, 4883 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:35,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:35,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:35,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:36,372 INFO L124 PetriNetUnfolderBase]: 2884/4508 cut-off events. [2024-06-21 18:36:36,372 INFO L125 PetriNetUnfolderBase]: For 147536/147542 co-relation queries the response was YES. [2024-06-21 18:36:36,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31223 conditions, 4508 events. 2884/4508 cut-off events. For 147536/147542 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 24773 event pairs, 670 based on Foata normal form. 10/4517 useless extension candidates. Maximal degree in co-relation 31145. Up to 3905 conditions per place. [2024-06-21 18:36:36,423 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 293 selfloop transitions, 104 changer transitions 0/402 dead transitions. [2024-06-21 18:36:36,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 402 transitions, 5884 flow [2024-06-21 18:36:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 18:36:36,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-21 18:36:36,425 INFO L175 Difference]: Start difference. First operand has 206 places, 371 transitions, 4883 flow. Second operand 10 states and 186 transitions. [2024-06-21 18:36:36,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 402 transitions, 5884 flow [2024-06-21 18:36:36,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 402 transitions, 5709 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 18:36:36,618 INFO L231 Difference]: Finished difference. Result has 211 places, 373 transitions, 4983 flow [2024-06-21 18:36:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4983, PETRI_PLACES=211, PETRI_TRANSITIONS=373} [2024-06-21 18:36:36,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 18:36:36,619 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 373 transitions, 4983 flow [2024-06-21 18:36:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:36,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:36,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:36:36,620 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -388790037, now seen corresponding path program 8 times [2024-06-21 18:36:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512609617] [2024-06-21 18:36:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:38,500 INFO 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 18:36:38,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512609617] [2024-06-21 18:36:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512609617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:38,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:38,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694727259] [2024-06-21 18:36:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:38,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:38,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:38,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 373 transitions, 4983 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:38,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:38,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:38,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:39,636 INFO L124 PetriNetUnfolderBase]: 2901/4535 cut-off events. [2024-06-21 18:36:39,636 INFO L125 PetriNetUnfolderBase]: For 156860/156866 co-relation queries the response was YES. [2024-06-21 18:36:39,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31804 conditions, 4535 events. 2901/4535 cut-off events. For 156860/156866 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24980 event pairs, 611 based on Foata normal form. 10/4544 useless extension candidates. Maximal degree in co-relation 31726. Up to 3648 conditions per place. [2024-06-21 18:36:39,679 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 279 selfloop transitions, 124 changer transitions 0/408 dead transitions. [2024-06-21 18:36:39,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 408 transitions, 6171 flow [2024-06-21 18:36:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 18:36:39,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 18:36:39,681 INFO L175 Difference]: Start difference. First operand has 211 places, 373 transitions, 4983 flow. Second operand 10 states and 188 transitions. [2024-06-21 18:36:39,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 408 transitions, 6171 flow [2024-06-21 18:36:39,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 408 transitions, 5914 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 18:36:39,859 INFO L231 Difference]: Finished difference. Result has 213 places, 377 transitions, 5105 flow [2024-06-21 18:36:39,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5105, PETRI_PLACES=213, PETRI_TRANSITIONS=377} [2024-06-21 18:36:39,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 18:36:39,859 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 377 transitions, 5105 flow [2024-06-21 18:36:39,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:39,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:39,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:36:39,860 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:39,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash -353030781, now seen corresponding path program 9 times [2024-06-21 18:36:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:39,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680464215] [2024-06-21 18:36:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:41,500 INFO 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 18:36:41,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:41,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680464215] [2024-06-21 18:36:41,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680464215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:41,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:41,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465915402] [2024-06-21 18:36:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:41,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:41,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 377 transitions, 5105 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:41,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:41,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:41,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:42,643 INFO L124 PetriNetUnfolderBase]: 2918/4562 cut-off events. [2024-06-21 18:36:42,643 INFO L125 PetriNetUnfolderBase]: For 166004/166010 co-relation queries the response was YES. [2024-06-21 18:36:42,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32415 conditions, 4562 events. 2918/4562 cut-off events. For 166004/166010 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 25125 event pairs, 680 based on Foata normal form. 10/4571 useless extension candidates. Maximal degree in co-relation 32336. Up to 4003 conditions per place. [2024-06-21 18:36:42,690 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 305 selfloop transitions, 97 changer transitions 0/407 dead transitions. [2024-06-21 18:36:42,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 407 transitions, 6118 flow [2024-06-21 18:36:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 18:36:42,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 18:36:42,692 INFO L175 Difference]: Start difference. First operand has 213 places, 377 transitions, 5105 flow. Second operand 10 states and 185 transitions. [2024-06-21 18:36:42,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 407 transitions, 6118 flow [2024-06-21 18:36:42,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 407 transitions, 5933 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 18:36:42,892 INFO L231 Difference]: Finished difference. Result has 217 places, 379 transitions, 5189 flow [2024-06-21 18:36:42,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4922, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5189, PETRI_PLACES=217, PETRI_TRANSITIONS=379} [2024-06-21 18:36:42,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-21 18:36:42,893 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 379 transitions, 5189 flow [2024-06-21 18:36:42,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:42,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:42,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:42,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:36:42,894 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:42,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash -345612171, now seen corresponding path program 10 times [2024-06-21 18:36:42,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:42,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776302162] [2024-06-21 18:36:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:42,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:44,553 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 18:36:44,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776302162] [2024-06-21 18:36:44,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776302162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:44,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:44,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346535541] [2024-06-21 18:36:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:44,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:44,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:44,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:44,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 379 transitions, 5189 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:44,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:44,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:44,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:45,865 INFO L124 PetriNetUnfolderBase]: 2935/4589 cut-off events. [2024-06-21 18:36:45,865 INFO L125 PetriNetUnfolderBase]: For 174100/174106 co-relation queries the response was YES. [2024-06-21 18:36:45,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32988 conditions, 4589 events. 2935/4589 cut-off events. For 174100/174106 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 25278 event pairs, 675 based on Foata normal form. 10/4598 useless extension candidates. Maximal degree in co-relation 32907. Up to 3968 conditions per place. [2024-06-21 18:36:45,910 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 308 selfloop transitions, 99 changer transitions 0/412 dead transitions. [2024-06-21 18:36:45,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 412 transitions, 6239 flow [2024-06-21 18:36:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 18:36:45,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-21 18:36:45,912 INFO L175 Difference]: Start difference. First operand has 217 places, 379 transitions, 5189 flow. Second operand 10 states and 187 transitions. [2024-06-21 18:36:45,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 412 transitions, 6239 flow [2024-06-21 18:36:46,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 412 transitions, 5959 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 18:36:46,221 INFO L231 Difference]: Finished difference. Result has 219 places, 381 transitions, 5184 flow [2024-06-21 18:36:46,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5184, PETRI_PLACES=219, PETRI_TRANSITIONS=381} [2024-06-21 18:36:46,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 18:36:46,222 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 381 transitions, 5184 flow [2024-06-21 18:36:46,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:46,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:46,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:46,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:36:46,223 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 18:36:46,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -146163685, now seen corresponding path program 2 times [2024-06-21 18:36:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683252086] [2024-06-21 18:36:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:48,127 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 18:36:48,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:48,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683252086] [2024-06-21 18:36:48,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683252086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:48,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:48,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:36:48,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919280670] [2024-06-21 18:36:48,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:36:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:36:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:36:48,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:36:48,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 381 transitions, 5184 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:48,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:48,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:36:48,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:49,071 INFO L124 PetriNetUnfolderBase]: 2688/4284 cut-off events. [2024-06-21 18:36:49,071 INFO L125 PetriNetUnfolderBase]: For 181767/181860 co-relation queries the response was YES. [2024-06-21 18:36:49,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31008 conditions, 4284 events. 2688/4284 cut-off events. For 181767/181860 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24197 event pairs, 680 based on Foata normal form. 94/4331 useless extension candidates. Maximal degree in co-relation 30926. Up to 3547 conditions per place. [2024-06-21 18:36:49,117 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 244 selfloop transitions, 88 changer transitions 0/406 dead transitions. [2024-06-21 18:36:49,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 406 transitions, 6204 flow [2024-06-21 18:36:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:36:49,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:36:49,118 INFO L175 Difference]: Start difference. First operand has 219 places, 381 transitions, 5184 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:36:49,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 406 transitions, 6204 flow [2024-06-21 18:36:49,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 406 transitions, 5951 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 18:36:49,328 INFO L231 Difference]: Finished difference. Result has 221 places, 395 transitions, 5365 flow [2024-06-21 18:36:49,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5365, PETRI_PLACES=221, PETRI_TRANSITIONS=395} [2024-06-21 18:36:49,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 18:36:49,329 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 395 transitions, 5365 flow [2024-06-21 18:36:49,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:49,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:49,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:49,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:36:49,344 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 18:36:49,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash 23147867, now seen corresponding path program 3 times [2024-06-21 18:36:49,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:49,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383356238] [2024-06-21 18:36:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:49,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:50,845 INFO 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 18:36:50,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:50,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383356238] [2024-06-21 18:36:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383356238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:50,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:50,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:36:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306523102] [2024-06-21 18:36:50,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:50,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:36:50,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:36:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:36:51,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:36:51,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 395 transitions, 5365 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 18:36:51,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:51,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:36:51,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:51,815 INFO L124 PetriNetUnfolderBase]: 2711/4317 cut-off events. [2024-06-21 18:36:51,815 INFO L125 PetriNetUnfolderBase]: For 192928/193021 co-relation queries the response was YES. [2024-06-21 18:36:51,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32156 conditions, 4317 events. 2711/4317 cut-off events. For 192928/193021 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24375 event pairs, 680 based on Foata normal form. 94/4364 useless extension candidates. Maximal degree in co-relation 32071. Up to 3617 conditions per place. [2024-06-21 18:36:51,861 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 82 changer transitions 0/413 dead transitions. [2024-06-21 18:36:51,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 413 transitions, 6357 flow [2024-06-21 18:36:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:36:51,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:36:51,863 INFO L175 Difference]: Start difference. First operand has 221 places, 395 transitions, 5365 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:36:51,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 413 transitions, 6357 flow [2024-06-21 18:36:52,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 413 transitions, 6217 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 18:36:52,084 INFO L231 Difference]: Finished difference. Result has 226 places, 402 transitions, 5533 flow [2024-06-21 18:36:52,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5241, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5533, PETRI_PLACES=226, PETRI_TRANSITIONS=402} [2024-06-21 18:36:52,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 18:36:52,086 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 402 transitions, 5533 flow [2024-06-21 18:36:52,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 18:36:52,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:52,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:52,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:36:52,086 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 18:36:52,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -841673557, now seen corresponding path program 3 times [2024-06-21 18:36:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:52,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452324715] [2024-06-21 18:36:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:52,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:53,285 INFO 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 18:36:53,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:53,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452324715] [2024-06-21 18:36:53,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452324715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:53,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:53,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:36:53,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915669980] [2024-06-21 18:36:53,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:53,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:36:53,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:36:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:36:53,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:36:53,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 402 transitions, 5533 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:53,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:53,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:36:53,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:54,201 INFO L124 PetriNetUnfolderBase]: 2842/4479 cut-off events. [2024-06-21 18:36:54,201 INFO L125 PetriNetUnfolderBase]: For 200631/200686 co-relation queries the response was YES. [2024-06-21 18:36:54,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33639 conditions, 4479 events. 2842/4479 cut-off events. For 200631/200686 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 24957 event pairs, 667 based on Foata normal form. 55/4494 useless extension candidates. Maximal degree in co-relation 33552. Up to 3931 conditions per place. [2024-06-21 18:36:54,248 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 304 selfloop transitions, 72 changer transitions 0/418 dead transitions. [2024-06-21 18:36:54,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 418 transitions, 6509 flow [2024-06-21 18:36:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 18:36:54,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 18:36:54,250 INFO L175 Difference]: Start difference. First operand has 226 places, 402 transitions, 5533 flow. Second operand 8 states and 146 transitions. [2024-06-21 18:36:54,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 418 transitions, 6509 flow [2024-06-21 18:36:54,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 418 transitions, 6313 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 18:36:54,547 INFO L231 Difference]: Finished difference. Result has 229 places, 408 transitions, 5605 flow [2024-06-21 18:36:54,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5605, PETRI_PLACES=229, PETRI_TRANSITIONS=408} [2024-06-21 18:36:54,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-21 18:36:54,547 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 408 transitions, 5605 flow [2024-06-21 18:36:54,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:54,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:54,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:54,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:36:54,548 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:54,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:54,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1983376881, now seen corresponding path program 11 times [2024-06-21 18:36:54,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:54,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626908193] [2024-06-21 18:36:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:54,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:55,816 INFO 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 18:36:55,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626908193] [2024-06-21 18:36:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626908193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:55,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:55,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:36:55,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439937359] [2024-06-21 18:36:55,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:55,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:36:55,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:36:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:36:55,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:36:55,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 408 transitions, 5605 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:55,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:55,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:36:55,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:57,087 INFO L124 PetriNetUnfolderBase]: 3142/4902 cut-off events. [2024-06-21 18:36:57,087 INFO L125 PetriNetUnfolderBase]: For 213140/213144 co-relation queries the response was YES. [2024-06-21 18:36:57,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36459 conditions, 4902 events. 3142/4902 cut-off events. For 213140/213144 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27346 event pairs, 691 based on Foata normal form. 8/4908 useless extension candidates. Maximal degree in co-relation 36371. Up to 4264 conditions per place. [2024-06-21 18:36:57,138 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 341 selfloop transitions, 147 changer transitions 0/493 dead transitions. [2024-06-21 18:36:57,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 493 transitions, 7355 flow [2024-06-21 18:36:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:36:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:36:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:36:57,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:36:57,140 INFO L175 Difference]: Start difference. First operand has 229 places, 408 transitions, 5605 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:36:57,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 493 transitions, 7355 flow [2024-06-21 18:36:57,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 493 transitions, 7225 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 18:36:57,423 INFO L231 Difference]: Finished difference. Result has 237 places, 454 transitions, 6429 flow [2024-06-21 18:36:57,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5493, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6429, PETRI_PLACES=237, PETRI_TRANSITIONS=454} [2024-06-21 18:36:57,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-21 18:36:57,426 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 454 transitions, 6429 flow [2024-06-21 18:36:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:57,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:57,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:57,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:36:57,426 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 18:36:57,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 415460513, now seen corresponding path program 4 times [2024-06-21 18:36:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:57,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911638811] [2024-06-21 18:36:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:36:58,348 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 18:36:58,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:36:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911638811] [2024-06-21 18:36:58,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911638811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:36:58,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:36:58,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:36:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764503669] [2024-06-21 18:36:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:36:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:36:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:36:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:36:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:36:58,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:36:58,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 454 transitions, 6429 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:58,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:36:58,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:36:58,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:36:59,425 INFO L124 PetriNetUnfolderBase]: 2997/4718 cut-off events. [2024-06-21 18:36:59,425 INFO L125 PetriNetUnfolderBase]: For 223424/223497 co-relation queries the response was YES. [2024-06-21 18:36:59,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36303 conditions, 4718 events. 2997/4718 cut-off events. For 223424/223497 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26496 event pairs, 648 based on Foata normal form. 74/4758 useless extension candidates. Maximal degree in co-relation 36211. Up to 4205 conditions per place. [2024-06-21 18:36:59,474 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 360 selfloop transitions, 86 changer transitions 0/488 dead transitions. [2024-06-21 18:36:59,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 488 transitions, 7566 flow [2024-06-21 18:36:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:36:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:36:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 18:36:59,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 18:36:59,475 INFO L175 Difference]: Start difference. First operand has 237 places, 454 transitions, 6429 flow. Second operand 8 states and 158 transitions. [2024-06-21 18:36:59,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 488 transitions, 7566 flow [2024-06-21 18:36:59,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 488 transitions, 7163 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 18:36:59,867 INFO L231 Difference]: Finished difference. Result has 240 places, 465 transitions, 6403 flow [2024-06-21 18:36:59,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6403, PETRI_PLACES=240, PETRI_TRANSITIONS=465} [2024-06-21 18:36:59,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-21 18:36:59,868 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 465 transitions, 6403 flow [2024-06-21 18:36:59,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:36:59,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:36:59,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:36:59,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:36:59,868 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:36:59,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:36:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1077842097, now seen corresponding path program 12 times [2024-06-21 18:36:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:36:59,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928552405] [2024-06-21 18:36:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:36:59,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:36:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:01,207 INFO 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 18:37:01,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:01,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928552405] [2024-06-21 18:37:01,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928552405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:01,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:01,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:37:01,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799904631] [2024-06-21 18:37:01,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:37:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:37:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:37:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:01,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 465 transitions, 6403 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:01,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:01,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:02,473 INFO L124 PetriNetUnfolderBase]: 3314/5174 cut-off events. [2024-06-21 18:37:02,473 INFO L125 PetriNetUnfolderBase]: For 231521/231525 co-relation queries the response was YES. [2024-06-21 18:37:02,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38708 conditions, 5174 events. 3314/5174 cut-off events. For 231521/231525 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29240 event pairs, 697 based on Foata normal form. 8/5180 useless extension candidates. Maximal degree in co-relation 38615. Up to 4448 conditions per place. [2024-06-21 18:37:02,531 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 187 changer transitions 0/551 dead transitions. [2024-06-21 18:37:02,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 551 transitions, 8356 flow [2024-06-21 18:37:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:37:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:37:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:37:02,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:37:02,533 INFO L175 Difference]: Start difference. First operand has 240 places, 465 transitions, 6403 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:37:02,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 551 transitions, 8356 flow [2024-06-21 18:37:02,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 551 transitions, 8188 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 18:37:02,894 INFO L231 Difference]: Finished difference. Result has 248 places, 516 transitions, 7397 flow [2024-06-21 18:37:02,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7397, PETRI_PLACES=248, PETRI_TRANSITIONS=516} [2024-06-21 18:37:02,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 18:37:02,895 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 516 transitions, 7397 flow [2024-06-21 18:37:02,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:02,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:02,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:02,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:37:02,895 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:02,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1989130289, now seen corresponding path program 13 times [2024-06-21 18:37:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:02,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118197147] [2024-06-21 18:37:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:04,338 INFO 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 18:37:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118197147] [2024-06-21 18:37:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118197147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:37:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082959601] [2024-06-21 18:37:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:37:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:37:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:37:04,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:04,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 516 transitions, 7397 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:04,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:04,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:04,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:05,703 INFO L124 PetriNetUnfolderBase]: 3381/5280 cut-off events. [2024-06-21 18:37:05,703 INFO L125 PetriNetUnfolderBase]: For 245444/245448 co-relation queries the response was YES. [2024-06-21 18:37:05,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40206 conditions, 5280 events. 3381/5280 cut-off events. For 245444/245448 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29886 event pairs, 690 based on Foata normal form. 8/5286 useless extension candidates. Maximal degree in co-relation 40110. Up to 4543 conditions per place. [2024-06-21 18:37:05,763 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 371 selfloop transitions, 195 changer transitions 0/571 dead transitions. [2024-06-21 18:37:05,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 571 transitions, 9030 flow [2024-06-21 18:37:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:37:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:37:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:37:05,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:37:05,770 INFO L175 Difference]: Start difference. First operand has 248 places, 516 transitions, 7397 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:37:05,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 571 transitions, 9030 flow [2024-06-21 18:37:06,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 571 transitions, 8778 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 18:37:06,139 INFO L231 Difference]: Finished difference. Result has 255 places, 535 transitions, 7876 flow [2024-06-21 18:37:06,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7876, PETRI_PLACES=255, PETRI_TRANSITIONS=535} [2024-06-21 18:37:06,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-21 18:37:06,141 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 535 transitions, 7876 flow [2024-06-21 18:37:06,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:06,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:06,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:06,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:37:06,146 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:06,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2137211231, now seen corresponding path program 14 times [2024-06-21 18:37:06,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:06,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240780794] [2024-06-21 18:37:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:06,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:07,852 INFO 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 18:37:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240780794] [2024-06-21 18:37:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240780794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:07,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:07,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:37:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766855388] [2024-06-21 18:37:07,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:07,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:37:07,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:07,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:37:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:37:08,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:08,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 535 transitions, 7876 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:08,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:08,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:08,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:09,358 INFO L124 PetriNetUnfolderBase]: 3409/5324 cut-off events. [2024-06-21 18:37:09,359 INFO L125 PetriNetUnfolderBase]: For 258228/258232 co-relation queries the response was YES. [2024-06-21 18:37:09,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40811 conditions, 5324 events. 3409/5324 cut-off events. For 258228/258232 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30266 event pairs, 695 based on Foata normal form. 8/5330 useless extension candidates. Maximal degree in co-relation 40714. Up to 4587 conditions per place. [2024-06-21 18:37:09,422 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 368 selfloop transitions, 201 changer transitions 0/574 dead transitions. [2024-06-21 18:37:09,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 574 transitions, 9302 flow [2024-06-21 18:37:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:37:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:37:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:37:09,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:37:09,424 INFO L175 Difference]: Start difference. First operand has 255 places, 535 transitions, 7876 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:37:09,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 574 transitions, 9302 flow [2024-06-21 18:37:09,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 574 transitions, 8892 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 18:37:09,908 INFO L231 Difference]: Finished difference. Result has 260 places, 539 transitions, 7981 flow [2024-06-21 18:37:09,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7466, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7981, PETRI_PLACES=260, PETRI_TRANSITIONS=539} [2024-06-21 18:37:09,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 18:37:09,909 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 539 transitions, 7981 flow [2024-06-21 18:37:09,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:09,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:09,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:09,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:37:09,910 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:09,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -575912169, now seen corresponding path program 15 times [2024-06-21 18:37:09,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:09,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124784409] [2024-06-21 18:37:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:09,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:11,530 INFO 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 18:37:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:11,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124784409] [2024-06-21 18:37:11,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124784409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:11,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:37:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894888788] [2024-06-21 18:37:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:11,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:37:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:37:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:37:11,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:11,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 539 transitions, 7981 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:11,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:11,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:11,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:13,015 INFO L124 PetriNetUnfolderBase]: 3412/5329 cut-off events. [2024-06-21 18:37:13,016 INFO L125 PetriNetUnfolderBase]: For 264154/264158 co-relation queries the response was YES. [2024-06-21 18:37:13,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40703 conditions, 5329 events. 3412/5329 cut-off events. For 264154/264158 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30240 event pairs, 688 based on Foata normal form. 8/5335 useless extension candidates. Maximal degree in co-relation 40605. Up to 4428 conditions per place. [2024-06-21 18:37:13,067 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 351 selfloop transitions, 221 changer transitions 0/577 dead transitions. [2024-06-21 18:37:13,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 577 transitions, 9336 flow [2024-06-21 18:37:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:37:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:37:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:37:13,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:37:13,069 INFO L175 Difference]: Start difference. First operand has 260 places, 539 transitions, 7981 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:37:13,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 577 transitions, 9336 flow [2024-06-21 18:37:13,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 577 transitions, 8865 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 18:37:13,440 INFO L231 Difference]: Finished difference. Result has 264 places, 541 transitions, 7980 flow [2024-06-21 18:37:13,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7980, PETRI_PLACES=264, PETRI_TRANSITIONS=541} [2024-06-21 18:37:13,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 18:37:13,441 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 541 transitions, 7980 flow [2024-06-21 18:37:13,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:13,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:13,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:37:13,442 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 18:37:13,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash 806381273, now seen corresponding path program 5 times [2024-06-21 18:37:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:13,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659445495] [2024-06-21 18:37:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:14,365 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 18:37:14,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:14,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659445495] [2024-06-21 18:37:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659445495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:37:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620891751] [2024-06-21 18:37:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:37:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:37:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:37:14,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:37:14,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 541 transitions, 7980 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:14,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:14,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:37:14,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:15,696 INFO L124 PetriNetUnfolderBase]: 3273/5142 cut-off events. [2024-06-21 18:37:15,696 INFO L125 PetriNetUnfolderBase]: For 274454/274516 co-relation queries the response was YES. [2024-06-21 18:37:15,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39984 conditions, 5142 events. 3273/5142 cut-off events. For 274454/274516 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29415 event pairs, 665 based on Foata normal form. 64/5172 useless extension candidates. Maximal degree in co-relation 39885. Up to 4324 conditions per place. [2024-06-21 18:37:15,749 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 334 selfloop transitions, 200 changer transitions 0/576 dead transitions. [2024-06-21 18:37:15,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 576 transitions, 9334 flow [2024-06-21 18:37:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:37:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:37:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:37:15,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-21 18:37:15,751 INFO L175 Difference]: Start difference. First operand has 264 places, 541 transitions, 7980 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:37:15,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 576 transitions, 9334 flow [2024-06-21 18:37:16,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 576 transitions, 8755 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 18:37:16,155 INFO L231 Difference]: Finished difference. Result has 263 places, 553 transitions, 8041 flow [2024-06-21 18:37:16,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8041, PETRI_PLACES=263, PETRI_TRANSITIONS=553} [2024-06-21 18:37:16,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-21 18:37:16,156 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 553 transitions, 8041 flow [2024-06-21 18:37:16,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:16,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:16,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:16,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:37:16,157 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 18:37:16,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1327783913, now seen corresponding path program 6 times [2024-06-21 18:37:16,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:16,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73449966] [2024-06-21 18:37:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:17,164 INFO 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 18:37:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73449966] [2024-06-21 18:37:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73449966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:17,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:17,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:37:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937172442] [2024-06-21 18:37:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:37:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:37:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:37:17,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:37:17,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 553 transitions, 8041 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:17,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:17,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:37:17,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:18,327 INFO L124 PetriNetUnfolderBase]: 3276/5166 cut-off events. [2024-06-21 18:37:18,327 INFO L125 PetriNetUnfolderBase]: For 281367/281433 co-relation queries the response was YES. [2024-06-21 18:37:18,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40017 conditions, 5166 events. 3276/5166 cut-off events. For 281367/281433 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29608 event pairs, 664 based on Foata normal form. 66/5195 useless extension candidates. Maximal degree in co-relation 39917. Up to 4549 conditions per place. [2024-06-21 18:37:18,380 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 414 selfloop transitions, 120 changer transitions 0/576 dead transitions. [2024-06-21 18:37:18,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 576 transitions, 9228 flow [2024-06-21 18:37:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:37:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:37:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:37:18,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:37:18,382 INFO L175 Difference]: Start difference. First operand has 263 places, 553 transitions, 8041 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:37:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 576 transitions, 9228 flow [2024-06-21 18:37:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 576 transitions, 8761 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 18:37:18,739 INFO L231 Difference]: Finished difference. Result has 265 places, 558 transitions, 7873 flow [2024-06-21 18:37:18,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7574, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7873, PETRI_PLACES=265, PETRI_TRANSITIONS=558} [2024-06-21 18:37:18,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-21 18:37:18,740 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 558 transitions, 7873 flow [2024-06-21 18:37:18,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:18,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:18,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:37:18,740 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 18:37:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1327784347, now seen corresponding path program 4 times [2024-06-21 18:37:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:18,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577860379] [2024-06-21 18:37:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:37:20,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:20,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577860379] [2024-06-21 18:37:20,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577860379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:20,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:20,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:37:20,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079367358] [2024-06-21 18:37:20,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:37:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:37:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:37:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:37:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 558 transitions, 7873 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:20,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:37:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:21,268 INFO L124 PetriNetUnfolderBase]: 3090/4952 cut-off events. [2024-06-21 18:37:21,268 INFO L125 PetriNetUnfolderBase]: For 283926/284034 co-relation queries the response was YES. [2024-06-21 18:37:21,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37978 conditions, 4952 events. 3090/4952 cut-off events. For 283926/284034 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29219 event pairs, 698 based on Foata normal form. 110/5018 useless extension candidates. Maximal degree in co-relation 37877. Up to 4102 conditions per place. [2024-06-21 18:37:21,326 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 380 selfloop transitions, 77 changer transitions 0/585 dead transitions. [2024-06-21 18:37:21,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 585 transitions, 9058 flow [2024-06-21 18:37:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:37:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:37:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 18:37:21,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 18:37:21,328 INFO L175 Difference]: Start difference. First operand has 265 places, 558 transitions, 7873 flow. Second operand 8 states and 165 transitions. [2024-06-21 18:37:21,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 585 transitions, 9058 flow [2024-06-21 18:37:21,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 585 transitions, 8788 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 18:37:21,847 INFO L231 Difference]: Finished difference. Result has 269 places, 566 transitions, 7909 flow [2024-06-21 18:37:21,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7603, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7909, PETRI_PLACES=269, PETRI_TRANSITIONS=566} [2024-06-21 18:37:21,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 18:37:21,848 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 566 transitions, 7909 flow [2024-06-21 18:37:21,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:21,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:21,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:21,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:37:21,849 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 18:37:21,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash -847856383, now seen corresponding path program 1 times [2024-06-21 18:37:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763181759] [2024-06-21 18:37:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:23,089 INFO 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 18:37:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763181759] [2024-06-21 18:37:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763181759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:23,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:37:23,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30243407] [2024-06-21 18:37:23,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:37:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:37:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:37:23,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:37:23,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 566 transitions, 7909 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 18:37:23,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:23,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:37:23,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:24,306 INFO L124 PetriNetUnfolderBase]: 3189/5120 cut-off events. [2024-06-21 18:37:24,306 INFO L125 PetriNetUnfolderBase]: For 289325/289349 co-relation queries the response was YES. [2024-06-21 18:37:24,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39011 conditions, 5120 events. 3189/5120 cut-off events. For 289325/289349 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30396 event pairs, 849 based on Foata normal form. 24/5131 useless extension candidates. Maximal degree in co-relation 38908. Up to 4355 conditions per place. [2024-06-21 18:37:24,368 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 465 selfloop transitions, 21 changer transitions 0/584 dead transitions. [2024-06-21 18:37:24,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 584 transitions, 9022 flow [2024-06-21 18:37:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:37:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:37:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:37:24,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 18:37:24,370 INFO L175 Difference]: Start difference. First operand has 269 places, 566 transitions, 7909 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:37:24,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 584 transitions, 9022 flow [2024-06-21 18:37:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 584 transitions, 8844 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:37:24,812 INFO L231 Difference]: Finished difference. Result has 272 places, 572 transitions, 7882 flow [2024-06-21 18:37:24,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7882, PETRI_PLACES=272, PETRI_TRANSITIONS=572} [2024-06-21 18:37:24,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-21 18:37:24,813 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 572 transitions, 7882 flow [2024-06-21 18:37:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 18:37:24,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:24,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:37:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:37:24,813 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 18:37:24,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 23393697, now seen corresponding path program 2 times [2024-06-21 18:37:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699799602] [2024-06-21 18:37:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:37:26,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699799602] [2024-06-21 18:37:26,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699799602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:26,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:37:26,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039717059] [2024-06-21 18:37:26,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:26,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:37:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:37:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:37:26,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:37:26,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 572 transitions, 7882 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 18:37:26,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:26,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:37:26,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:27,419 INFO L124 PetriNetUnfolderBase]: 3186/5114 cut-off events. [2024-06-21 18:37:27,419 INFO L125 PetriNetUnfolderBase]: For 297356/297380 co-relation queries the response was YES. [2024-06-21 18:37:27,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39243 conditions, 5114 events. 3186/5114 cut-off events. For 297356/297380 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30377 event pairs, 857 based on Foata normal form. 24/5124 useless extension candidates. Maximal degree in co-relation 39138. Up to 4342 conditions per place. [2024-06-21 18:37:27,480 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 461 selfloop transitions, 28 changer transitions 0/587 dead transitions. [2024-06-21 18:37:27,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 587 transitions, 8984 flow [2024-06-21 18:37:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:37:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:37:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 18:37:27,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 18:37:27,495 INFO L175 Difference]: Start difference. First operand has 272 places, 572 transitions, 7882 flow. Second operand 7 states and 138 transitions. [2024-06-21 18:37:27,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 587 transitions, 8984 flow [2024-06-21 18:37:28,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 587 transitions, 8916 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:37:28,018 INFO L231 Difference]: Finished difference. Result has 276 places, 578 transitions, 7986 flow [2024-06-21 18:37:28,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7986, PETRI_PLACES=276, PETRI_TRANSITIONS=578} [2024-06-21 18:37:28,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-21 18:37:28,019 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 578 transitions, 7986 flow [2024-06-21 18:37:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 18:37:28,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:28,019 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 18:37:28,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:37:28,020 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:28,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -311767492, now seen corresponding path program 1 times [2024-06-21 18:37:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:28,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159738195] [2024-06-21 18:37:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:29,643 INFO 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 18:37:29,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159738195] [2024-06-21 18:37:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159738195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:29,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:29,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466121112] [2024-06-21 18:37:29,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:29,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:29,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 578 transitions, 7986 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:29,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:29,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:29,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:31,532 INFO L124 PetriNetUnfolderBase]: 3551/5574 cut-off events. [2024-06-21 18:37:31,532 INFO L125 PetriNetUnfolderBase]: For 334985/334991 co-relation queries the response was YES. [2024-06-21 18:37:31,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43206 conditions, 5574 events. 3551/5574 cut-off events. For 334985/334991 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32291 event pairs, 682 based on Foata normal form. 20/5593 useless extension candidates. Maximal degree in co-relation 43099. Up to 4829 conditions per place. [2024-06-21 18:37:31,588 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 488 selfloop transitions, 122 changer transitions 0/615 dead transitions. [2024-06-21 18:37:31,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 615 transitions, 9430 flow [2024-06-21 18:37:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:37:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:37:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:37:31,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 18:37:31,590 INFO L175 Difference]: Start difference. First operand has 276 places, 578 transitions, 7986 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:37:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 615 transitions, 9430 flow [2024-06-21 18:37:32,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 615 transitions, 9336 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 18:37:32,083 INFO L231 Difference]: Finished difference. Result has 283 places, 579 transitions, 8195 flow [2024-06-21 18:37:32,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7892, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8195, PETRI_PLACES=283, PETRI_TRANSITIONS=579} [2024-06-21 18:37:32,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-21 18:37:32,084 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 579 transitions, 8195 flow [2024-06-21 18:37:32,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:32,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:32,085 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 18:37:32,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:37:32,085 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:32,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash 897630992, now seen corresponding path program 2 times [2024-06-21 18:37:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:32,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213810609] [2024-06-21 18:37:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:32,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:33,664 INFO 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 18:37:33,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:33,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213810609] [2024-06-21 18:37:33,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213810609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:33,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:33,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805814193] [2024-06-21 18:37:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:33,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:33,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:33,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 579 transitions, 8195 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:33,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:33,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:33,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:35,323 INFO L124 PetriNetUnfolderBase]: 3627/5712 cut-off events. [2024-06-21 18:37:35,323 INFO L125 PetriNetUnfolderBase]: For 351571/351577 co-relation queries the response was YES. [2024-06-21 18:37:35,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44694 conditions, 5712 events. 3627/5712 cut-off events. For 351571/351577 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33378 event pairs, 680 based on Foata normal form. 16/5727 useless extension candidates. Maximal degree in co-relation 44586. Up to 4831 conditions per place. [2024-06-21 18:37:35,388 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 497 selfloop transitions, 125 changer transitions 0/627 dead transitions. [2024-06-21 18:37:35,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 627 transitions, 9757 flow [2024-06-21 18:37:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:37:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:37:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 18:37:35,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:37:35,396 INFO L175 Difference]: Start difference. First operand has 283 places, 579 transitions, 8195 flow. Second operand 11 states and 220 transitions. [2024-06-21 18:37:35,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 627 transitions, 9757 flow [2024-06-21 18:37:35,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 627 transitions, 9471 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:37:35,871 INFO L231 Difference]: Finished difference. Result has 286 places, 582 transitions, 8251 flow [2024-06-21 18:37:35,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8251, PETRI_PLACES=286, PETRI_TRANSITIONS=582} [2024-06-21 18:37:35,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-21 18:37:35,872 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 582 transitions, 8251 flow [2024-06-21 18:37:35,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:35,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:35,872 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 18:37:35,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:37:35,872 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:35,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1015963820, now seen corresponding path program 1 times [2024-06-21 18:37:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:35,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90157433] [2024-06-21 18:37:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:37,553 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 18:37:37,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:37,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90157433] [2024-06-21 18:37:37,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90157433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:37,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:37,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:37,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436455994] [2024-06-21 18:37:37,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:37,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:37,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:37,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:37,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:37,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 582 transitions, 8251 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:37,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:37,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:37,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:39,224 INFO L124 PetriNetUnfolderBase]: 3702/5812 cut-off events. [2024-06-21 18:37:39,224 INFO L125 PetriNetUnfolderBase]: For 353504/353510 co-relation queries the response was YES. [2024-06-21 18:37:39,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45473 conditions, 5812 events. 3702/5812 cut-off events. For 353504/353510 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34083 event pairs, 725 based on Foata normal form. 10/5820 useless extension candidates. Maximal degree in co-relation 45364. Up to 4727 conditions per place. [2024-06-21 18:37:39,297 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 412 selfloop transitions, 215 changer transitions 0/632 dead transitions. [2024-06-21 18:37:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 632 transitions, 9870 flow [2024-06-21 18:37:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:37:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:37:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:37:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 18:37:39,300 INFO L175 Difference]: Start difference. First operand has 286 places, 582 transitions, 8251 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:37:39,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 632 transitions, 9870 flow [2024-06-21 18:37:39,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 632 transitions, 9612 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:37:39,941 INFO L231 Difference]: Finished difference. Result has 290 places, 598 transitions, 8619 flow [2024-06-21 18:37:39,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8619, PETRI_PLACES=290, PETRI_TRANSITIONS=598} [2024-06-21 18:37:39,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 18:37:39,942 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 598 transitions, 8619 flow [2024-06-21 18:37:39,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:39,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:39,942 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 18:37:39,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:37:39,942 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:39,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1187859064, now seen corresponding path program 2 times [2024-06-21 18:37:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347399416] [2024-06-21 18:37:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:37:41,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:41,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347399416] [2024-06-21 18:37:41,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347399416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:41,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:41,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:41,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586366336] [2024-06-21 18:37:41,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:41,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:41,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:41,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 598 transitions, 8619 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:41,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:41,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:41,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:43,492 INFO L124 PetriNetUnfolderBase]: 3752/5902 cut-off events. [2024-06-21 18:37:43,492 INFO L125 PetriNetUnfolderBase]: For 364837/364843 co-relation queries the response was YES. [2024-06-21 18:37:43,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46679 conditions, 5902 events. 3752/5902 cut-off events. For 364837/364843 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34795 event pairs, 725 based on Foata normal form. 10/5910 useless extension candidates. Maximal degree in co-relation 46568. Up to 4788 conditions per place. [2024-06-21 18:37:43,556 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 440 selfloop transitions, 200 changer transitions 0/645 dead transitions. [2024-06-21 18:37:43,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 645 transitions, 10295 flow [2024-06-21 18:37:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:37:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:37:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:37:43,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 18:37:43,558 INFO L175 Difference]: Start difference. First operand has 290 places, 598 transitions, 8619 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:37:43,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 645 transitions, 10295 flow [2024-06-21 18:37:44,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 645 transitions, 9880 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 18:37:44,239 INFO L231 Difference]: Finished difference. Result has 297 places, 609 transitions, 8793 flow [2024-06-21 18:37:44,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8222, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8793, PETRI_PLACES=297, PETRI_TRANSITIONS=609} [2024-06-21 18:37:44,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 18:37:44,240 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 609 transitions, 8793 flow [2024-06-21 18:37:44,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:44,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:44,241 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 18:37:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:37:44,241 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:44,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1188098074, now seen corresponding path program 3 times [2024-06-21 18:37:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:44,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578968372] [2024-06-21 18:37:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:45,926 INFO 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 18:37:45,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:45,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578968372] [2024-06-21 18:37:45,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578968372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:45,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:45,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:45,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487512198] [2024-06-21 18:37:45,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:45,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:46,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:46,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 609 transitions, 8793 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:46,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:46,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:46,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:47,891 INFO L124 PetriNetUnfolderBase]: 3794/5973 cut-off events. [2024-06-21 18:37:47,892 INFO L125 PetriNetUnfolderBase]: For 388115/388121 co-relation queries the response was YES. [2024-06-21 18:37:47,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47824 conditions, 5973 events. 3794/5973 cut-off events. For 388115/388121 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35374 event pairs, 722 based on Foata normal form. 10/5981 useless extension candidates. Maximal degree in co-relation 47711. Up to 4733 conditions per place. [2024-06-21 18:37:47,965 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 439 selfloop transitions, 208 changer transitions 0/652 dead transitions. [2024-06-21 18:37:47,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 652 transitions, 10632 flow [2024-06-21 18:37:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:37:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:37:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 18:37:47,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 18:37:47,967 INFO L175 Difference]: Start difference. First operand has 297 places, 609 transitions, 8793 flow. Second operand 11 states and 213 transitions. [2024-06-21 18:37:47,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 652 transitions, 10632 flow [2024-06-21 18:37:48,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 652 transitions, 10292 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 18:37:48,533 INFO L231 Difference]: Finished difference. Result has 303 places, 613 transitions, 8998 flow [2024-06-21 18:37:48,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8457, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8998, PETRI_PLACES=303, PETRI_TRANSITIONS=613} [2024-06-21 18:37:48,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-21 18:37:48,534 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 613 transitions, 8998 flow [2024-06-21 18:37:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:48,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:48,535 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 18:37:48,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:37:48,535 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:48,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:48,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1181602954, now seen corresponding path program 4 times [2024-06-21 18:37:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:48,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876903385] [2024-06-21 18:37:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:50,022 INFO 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 18:37:50,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:50,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876903385] [2024-06-21 18:37:50,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876903385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:50,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:50,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674113889] [2024-06-21 18:37:50,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:50,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 613 transitions, 8998 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:50,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:50,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:50,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:51,991 INFO L124 PetriNetUnfolderBase]: 3786/5951 cut-off events. [2024-06-21 18:37:51,991 INFO L125 PetriNetUnfolderBase]: For 394280/394286 co-relation queries the response was YES. [2024-06-21 18:37:52,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47728 conditions, 5951 events. 3786/5951 cut-off events. For 394280/394286 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35080 event pairs, 725 based on Foata normal form. 10/5959 useless extension candidates. Maximal degree in co-relation 47614. Up to 4842 conditions per place. [2024-06-21 18:37:52,096 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 445 selfloop transitions, 199 changer transitions 0/649 dead transitions. [2024-06-21 18:37:52,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 649 transitions, 10529 flow [2024-06-21 18:37:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:37:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:37:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 18:37:52,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-21 18:37:52,098 INFO L175 Difference]: Start difference. First operand has 303 places, 613 transitions, 8998 flow. Second operand 11 states and 211 transitions. [2024-06-21 18:37:52,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 649 transitions, 10529 flow [2024-06-21 18:37:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 649 transitions, 10208 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 18:37:52,893 INFO L231 Difference]: Finished difference. Result has 307 places, 613 transitions, 9082 flow [2024-06-21 18:37:52,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8677, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9082, PETRI_PLACES=307, PETRI_TRANSITIONS=613} [2024-06-21 18:37:52,894 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 18:37:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 613 transitions, 9082 flow [2024-06-21 18:37:52,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:52,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:52,895 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 18:37:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:37:52,895 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:52,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash -331436150, now seen corresponding path program 5 times [2024-06-21 18:37:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:52,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843138073] [2024-06-21 18:37:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:54,688 INFO 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 18:37:54,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:54,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843138073] [2024-06-21 18:37:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843138073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:54,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:54,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041751115] [2024-06-21 18:37:54,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:54,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:54,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:54,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:54,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 613 transitions, 9082 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:54,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:54,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:54,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:37:56,529 INFO L124 PetriNetUnfolderBase]: 3836/6033 cut-off events. [2024-06-21 18:37:56,530 INFO L125 PetriNetUnfolderBase]: For 406564/406570 co-relation queries the response was YES. [2024-06-21 18:37:56,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48779 conditions, 6033 events. 3836/6033 cut-off events. For 406564/406570 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35716 event pairs, 733 based on Foata normal form. 10/6041 useless extension candidates. Maximal degree in co-relation 48663. Up to 4900 conditions per place. [2024-06-21 18:37:56,610 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 450 selfloop transitions, 207 changer transitions 0/662 dead transitions. [2024-06-21 18:37:56,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 662 transitions, 10857 flow [2024-06-21 18:37:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:37:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:37:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:37:56,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 18:37:56,612 INFO L175 Difference]: Start difference. First operand has 307 places, 613 transitions, 9082 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:37:56,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 662 transitions, 10857 flow [2024-06-21 18:37:57,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 662 transitions, 10388 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 18:37:57,374 INFO L231 Difference]: Finished difference. Result has 309 places, 624 transitions, 9257 flow [2024-06-21 18:37:57,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8629, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9257, PETRI_PLACES=309, PETRI_TRANSITIONS=624} [2024-06-21 18:37:57,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 18:37:57,375 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 624 transitions, 9257 flow [2024-06-21 18:37:57,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:57,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:37:57,375 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 18:37:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:37:57,375 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:37:57,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:37:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -559337300, now seen corresponding path program 6 times [2024-06-21 18:37:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:37:57,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748254252] [2024-06-21 18:37:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:37:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:37:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:37:59,093 INFO 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 18:37:59,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:37:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748254252] [2024-06-21 18:37:59,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748254252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:37:59,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:37:59,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:37:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743268248] [2024-06-21 18:37:59,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:37:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:37:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:37:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:37:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:37:59,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:37:59,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 624 transitions, 9257 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:37:59,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:37:59,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:37:59,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:01,069 INFO L124 PetriNetUnfolderBase]: 3864/6076 cut-off events. [2024-06-21 18:38:01,070 INFO L125 PetriNetUnfolderBase]: For 422464/422470 co-relation queries the response was YES. [2024-06-21 18:38:01,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49721 conditions, 6076 events. 3864/6076 cut-off events. For 422464/422470 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35963 event pairs, 736 based on Foata normal form. 10/6084 useless extension candidates. Maximal degree in co-relation 49604. Up to 4939 conditions per place. [2024-06-21 18:38:01,137 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 455 selfloop transitions, 208 changer transitions 0/668 dead transitions. [2024-06-21 18:38:01,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 668 transitions, 10991 flow [2024-06-21 18:38:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 18:38:01,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-21 18:38:01,139 INFO L175 Difference]: Start difference. First operand has 309 places, 624 transitions, 9257 flow. Second operand 11 states and 211 transitions. [2024-06-21 18:38:01,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 668 transitions, 10991 flow [2024-06-21 18:38:01,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 668 transitions, 10659 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:01,798 INFO L231 Difference]: Finished difference. Result has 315 places, 629 transitions, 9455 flow [2024-06-21 18:38:01,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9455, PETRI_PLACES=315, PETRI_TRANSITIONS=629} [2024-06-21 18:38:01,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-21 18:38:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 629 transitions, 9455 flow [2024-06-21 18:38:01,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:01,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:01,800 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 18:38:01,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:38:01,800 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:01,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash -331197140, now seen corresponding path program 7 times [2024-06-21 18:38:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:01,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026696672] [2024-06-21 18:38:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:03,669 INFO 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 18:38:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026696672] [2024-06-21 18:38:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026696672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:03,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:03,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:03,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939877755] [2024-06-21 18:38:03,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:03,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:03,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:38:03,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 629 transitions, 9455 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:03,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:03,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:38:03,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:05,654 INFO L124 PetriNetUnfolderBase]: 3881/6103 cut-off events. [2024-06-21 18:38:05,654 INFO L125 PetriNetUnfolderBase]: For 436104/436110 co-relation queries the response was YES. [2024-06-21 18:38:05,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 6103 events. 3881/6103 cut-off events. For 436104/436110 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36180 event pairs, 738 based on Foata normal form. 10/6111 useless extension candidates. Maximal degree in co-relation 49924. Up to 4903 conditions per place. [2024-06-21 18:38:05,737 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 454 selfloop transitions, 212 changer transitions 0/671 dead transitions. [2024-06-21 18:38:05,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 671 transitions, 11159 flow [2024-06-21 18:38:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 18:38:05,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-21 18:38:05,739 INFO L175 Difference]: Start difference. First operand has 315 places, 629 transitions, 9455 flow. Second operand 11 states and 212 transitions. [2024-06-21 18:38:05,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 671 transitions, 11159 flow [2024-06-21 18:38:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 671 transitions, 10672 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 18:38:06,707 INFO L231 Difference]: Finished difference. Result has 318 places, 631 transitions, 9472 flow [2024-06-21 18:38:06,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9472, PETRI_PLACES=318, PETRI_TRANSITIONS=631} [2024-06-21 18:38:06,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-21 18:38:06,708 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 631 transitions, 9472 flow [2024-06-21 18:38:06,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:06,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:06,708 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 18:38:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:38:06,708 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:06,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1511052242, now seen corresponding path program 8 times [2024-06-21 18:38:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603376078] [2024-06-21 18:38:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:06,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:08,433 INFO 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 18:38:08,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603376078] [2024-06-21 18:38:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603376078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:08,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:08,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:08,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467535562] [2024-06-21 18:38:08,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:08,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:08,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:38:08,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 631 transitions, 9472 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:08,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:08,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:38:08,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:10,270 INFO L124 PetriNetUnfolderBase]: 3923/6174 cut-off events. [2024-06-21 18:38:10,271 INFO L125 PetriNetUnfolderBase]: For 458140/458146 co-relation queries the response was YES. [2024-06-21 18:38:10,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51075 conditions, 6174 events. 3923/6174 cut-off events. For 458140/458146 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36782 event pairs, 733 based on Foata normal form. 10/6182 useless extension candidates. Maximal degree in co-relation 50957. Up to 4648 conditions per place. [2024-06-21 18:38:10,349 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 438 selfloop transitions, 234 changer transitions 0/677 dead transitions. [2024-06-21 18:38:10,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 677 transitions, 11454 flow [2024-06-21 18:38:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 18:38:10,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-21 18:38:10,351 INFO L175 Difference]: Start difference. First operand has 318 places, 631 transitions, 9472 flow. Second operand 11 states and 214 transitions. [2024-06-21 18:38:10,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 677 transitions, 11454 flow [2024-06-21 18:38:11,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 677 transitions, 10970 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 18:38:11,256 INFO L231 Difference]: Finished difference. Result has 320 places, 635 transitions, 9612 flow [2024-06-21 18:38:11,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8988, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9612, PETRI_PLACES=320, PETRI_TRANSITIONS=635} [2024-06-21 18:38:11,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-21 18:38:11,257 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 635 transitions, 9612 flow [2024-06-21 18:38:11,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:11,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:11,257 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 18:38:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:38:11,258 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:11,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash -553081190, now seen corresponding path program 9 times [2024-06-21 18:38:11,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:11,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381277591] [2024-06-21 18:38:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:12,835 INFO 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 18:38:12,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381277591] [2024-06-21 18:38:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381277591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:12,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:12,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335191253] [2024-06-21 18:38:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:12,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:12,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:38:12,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 635 transitions, 9612 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:12,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:12,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:38:12,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:14,791 INFO L124 PetriNetUnfolderBase]: 3940/6206 cut-off events. [2024-06-21 18:38:14,792 INFO L125 PetriNetUnfolderBase]: For 472069/472075 co-relation queries the response was YES. [2024-06-21 18:38:14,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51723 conditions, 6206 events. 3940/6206 cut-off events. For 472069/472075 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37005 event pairs, 758 based on Foata normal form. 10/6214 useless extension candidates. Maximal degree in co-relation 51604. Up to 5059 conditions per place. [2024-06-21 18:38:14,880 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 469 selfloop transitions, 204 changer transitions 0/678 dead transitions. [2024-06-21 18:38:14,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 678 transitions, 11371 flow [2024-06-21 18:38:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 18:38:14,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-21 18:38:14,882 INFO L175 Difference]: Start difference. First operand has 320 places, 635 transitions, 9612 flow. Second operand 11 states and 212 transitions. [2024-06-21 18:38:14,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 678 transitions, 11371 flow [2024-06-21 18:38:15,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 678 transitions, 11057 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 18:38:15,816 INFO L231 Difference]: Finished difference. Result has 324 places, 637 transitions, 9793 flow [2024-06-21 18:38:15,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9300, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9793, PETRI_PLACES=324, PETRI_TRANSITIONS=637} [2024-06-21 18:38:15,819 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-21 18:38:15,819 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 637 transitions, 9793 flow [2024-06-21 18:38:15,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:15,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:15,819 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 18:38:15,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:38:15,819 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:15,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash -552842180, now seen corresponding path program 10 times [2024-06-21 18:38:15,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:15,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507979285] [2024-06-21 18:38:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:15,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:17,588 INFO 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 18:38:17,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:17,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507979285] [2024-06-21 18:38:17,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507979285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:17,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:17,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289873153] [2024-06-21 18:38:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:17,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:17,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:38:17,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 637 transitions, 9793 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:17,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:17,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:38:17,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:19,608 INFO L124 PetriNetUnfolderBase]: 3932/6184 cut-off events. [2024-06-21 18:38:19,608 INFO L125 PetriNetUnfolderBase]: For 477061/477067 co-relation queries the response was YES. [2024-06-21 18:38:19,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51835 conditions, 6184 events. 3932/6184 cut-off events. For 477061/477067 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36738 event pairs, 746 based on Foata normal form. 10/6192 useless extension candidates. Maximal degree in co-relation 51714. Up to 4966 conditions per place. [2024-06-21 18:38:19,681 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 466 selfloop transitions, 208 changer transitions 0/679 dead transitions. [2024-06-21 18:38:19,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 679 transitions, 11480 flow [2024-06-21 18:38:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 18:38:19,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 18:38:19,682 INFO L175 Difference]: Start difference. First operand has 324 places, 637 transitions, 9793 flow. Second operand 11 states and 213 transitions. [2024-06-21 18:38:19,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 679 transitions, 11480 flow [2024-06-21 18:38:20,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 679 transitions, 10957 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 18:38:20,494 INFO L231 Difference]: Finished difference. Result has 327 places, 637 transitions, 9694 flow [2024-06-21 18:38:20,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9270, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9694, PETRI_PLACES=327, PETRI_TRANSITIONS=637} [2024-06-21 18:38:20,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 18:38:20,495 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 637 transitions, 9694 flow [2024-06-21 18:38:20,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:20,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:20,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:20,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:38:20,495 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 18:38:20,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash 778532372, now seen corresponding path program 1 times [2024-06-21 18:38:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:20,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490569093] [2024-06-21 18:38:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:20,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:21,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:21,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490569093] [2024-06-21 18:38:21,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490569093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:21,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:21,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:38:21,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917107468] [2024-06-21 18:38:21,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:21,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:38:21,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:21,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:38:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:38:21,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:38:21,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 637 transitions, 9694 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:21,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:21,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:38:21,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:23,037 INFO L124 PetriNetUnfolderBase]: 3753/5946 cut-off events. [2024-06-21 18:38:23,037 INFO L125 PetriNetUnfolderBase]: For 488091/488165 co-relation queries the response was YES. [2024-06-21 18:38:23,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50675 conditions, 5946 events. 3753/5946 cut-off events. For 488091/488165 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35598 event pairs, 673 based on Foata normal form. 76/5977 useless extension candidates. Maximal degree in co-relation 50553. Up to 5208 conditions per place. [2024-06-21 18:38:23,111 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 494 selfloop transitions, 130 changer transitions 0/668 dead transitions. [2024-06-21 18:38:23,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 668 transitions, 11207 flow [2024-06-21 18:38:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:38:23,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:38:23,113 INFO L175 Difference]: Start difference. First operand has 327 places, 637 transitions, 9694 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:38:23,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 668 transitions, 11207 flow [2024-06-21 18:38:23,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 668 transitions, 10513 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-21 18:38:23,928 INFO L231 Difference]: Finished difference. Result has 327 places, 648 transitions, 9553 flow [2024-06-21 18:38:23,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9018, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9553, PETRI_PLACES=327, PETRI_TRANSITIONS=648} [2024-06-21 18:38:23,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 18:38:23,928 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 648 transitions, 9553 flow [2024-06-21 18:38:23,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:23,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:23,929 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 18:38:23,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:38:23,929 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 18:38:23,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -754708889, now seen corresponding path program 1 times [2024-06-21 18:38:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:23,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826815488] [2024-06-21 18:38:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:23,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826815488] [2024-06-21 18:38:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826815488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:38:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975548326] [2024-06-21 18:38:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:38:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:38:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:38:25,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:38:25,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 648 transitions, 9553 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:25,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:25,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:38:25,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:27,206 INFO L124 PetriNetUnfolderBase]: 3778/5968 cut-off events. [2024-06-21 18:38:27,207 INFO L125 PetriNetUnfolderBase]: For 505737/505806 co-relation queries the response was YES. [2024-06-21 18:38:27,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 5968 events. 3778/5968 cut-off events. For 505737/505806 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35752 event pairs, 698 based on Foata normal form. 71/5992 useless extension candidates. Maximal degree in co-relation 50789. Up to 5068 conditions per place. [2024-06-21 18:38:27,294 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 427 selfloop transitions, 204 changer transitions 0/675 dead transitions. [2024-06-21 18:38:27,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 675 transitions, 11177 flow [2024-06-21 18:38:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:38:27,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:38:27,296 INFO L175 Difference]: Start difference. First operand has 327 places, 648 transitions, 9553 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:38:27,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 675 transitions, 11177 flow [2024-06-21 18:38:28,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 675 transitions, 11018 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 18:38:28,153 INFO L231 Difference]: Finished difference. Result has 333 places, 658 transitions, 10055 flow [2024-06-21 18:38:28,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10055, PETRI_PLACES=333, PETRI_TRANSITIONS=658} [2024-06-21 18:38:28,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 18:38:28,154 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 658 transitions, 10055 flow [2024-06-21 18:38:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:28,155 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 18:38:28,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:38:28,155 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 18:38:28,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash 778860662, now seen corresponding path program 2 times [2024-06-21 18:38:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:28,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543636620] [2024-06-21 18:38:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:29,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543636620] [2024-06-21 18:38:29,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543636620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:29,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:29,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:38:29,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670248840] [2024-06-21 18:38:29,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:29,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:38:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:38:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:38:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:38:29,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 658 transitions, 10055 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:29,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:29,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:38:29,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:30,881 INFO L124 PetriNetUnfolderBase]: 3804/6007 cut-off events. [2024-06-21 18:38:30,881 INFO L125 PetriNetUnfolderBase]: For 526173/526246 co-relation queries the response was YES. [2024-06-21 18:38:30,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52459 conditions, 6007 events. 3804/6007 cut-off events. For 526173/526246 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35964 event pairs, 698 based on Foata normal form. 76/6030 useless extension candidates. Maximal degree in co-relation 52332. Up to 4746 conditions per place. [2024-06-21 18:38:30,963 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 416 selfloop transitions, 223 changer transitions 0/683 dead transitions. [2024-06-21 18:38:30,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 683 transitions, 11699 flow [2024-06-21 18:38:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:38:30,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 18:38:30,964 INFO L175 Difference]: Start difference. First operand has 333 places, 658 transitions, 10055 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:38:30,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 683 transitions, 11699 flow [2024-06-21 18:38:31,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 683 transitions, 11413 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:31,836 INFO L231 Difference]: Finished difference. Result has 337 places, 665 transitions, 10396 flow [2024-06-21 18:38:31,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9769, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10396, PETRI_PLACES=337, PETRI_TRANSITIONS=665} [2024-06-21 18:38:31,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-21 18:38:31,837 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 665 transitions, 10396 flow [2024-06-21 18:38:31,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:31,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:31,837 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 18:38:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:38:31,838 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 18:38:31,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash -975363060, now seen corresponding path program 3 times [2024-06-21 18:38:31,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:31,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854968187] [2024-06-21 18:38:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:31,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:33,073 INFO 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 18:38:33,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:33,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854968187] [2024-06-21 18:38:33,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854968187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:33,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:33,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:38:33,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170189826] [2024-06-21 18:38:33,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:33,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:38:33,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:38:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:38:33,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:38:33,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 665 transitions, 10396 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:33,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:33,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:38:33,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:34,535 INFO L124 PetriNetUnfolderBase]: 3812/6049 cut-off events. [2024-06-21 18:38:34,535 INFO L125 PetriNetUnfolderBase]: For 545604/545677 co-relation queries the response was YES. [2024-06-21 18:38:34,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53871 conditions, 6049 events. 3812/6049 cut-off events. For 545604/545677 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 36455 event pairs, 672 based on Foata normal form. 75/6081 useless extension candidates. Maximal degree in co-relation 53742. Up to 5205 conditions per place. [2024-06-21 18:38:34,617 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 507 selfloop transitions, 133 changer transitions 0/684 dead transitions. [2024-06-21 18:38:34,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 684 transitions, 11862 flow [2024-06-21 18:38:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:38:34,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 18:38:34,622 INFO L175 Difference]: Start difference. First operand has 337 places, 665 transitions, 10396 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:38:34,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 684 transitions, 11862 flow [2024-06-21 18:38:35,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 684 transitions, 11508 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:35,528 INFO L231 Difference]: Finished difference. Result has 342 places, 670 transitions, 10495 flow [2024-06-21 18:38:35,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10082, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10495, PETRI_PLACES=342, PETRI_TRANSITIONS=670} [2024-06-21 18:38:35,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 18:38:35,529 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 670 transitions, 10495 flow [2024-06-21 18:38:35,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:35,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:35,529 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 18:38:35,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:38:35,530 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 18:38:35,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash 255584321, now seen corresponding path program 2 times [2024-06-21 18:38:35,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:35,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520676880] [2024-06-21 18:38:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:35,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:37,280 INFO 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 18:38:37,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520676880] [2024-06-21 18:38:37,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520676880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:37,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:38:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117126916] [2024-06-21 18:38:37,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:37,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:38:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:38:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:38:37,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:38:37,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 670 transitions, 10495 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:37,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:37,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:38:37,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:38,790 INFO L124 PetriNetUnfolderBase]: 3833/6048 cut-off events. [2024-06-21 18:38:38,791 INFO L125 PetriNetUnfolderBase]: For 565576/565645 co-relation queries the response was YES. [2024-06-21 18:38:38,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55070 conditions, 6048 events. 3833/6048 cut-off events. For 565576/565645 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36301 event pairs, 713 based on Foata normal form. 71/6069 useless extension candidates. Maximal degree in co-relation 54938. Up to 5096 conditions per place. [2024-06-21 18:38:38,878 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 437 selfloop transitions, 211 changer transitions 0/692 dead transitions. [2024-06-21 18:38:38,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 692 transitions, 12287 flow [2024-06-21 18:38:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:38:38,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:38:38,880 INFO L175 Difference]: Start difference. First operand has 342 places, 670 transitions, 10495 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:38:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 692 transitions, 12287 flow [2024-06-21 18:38:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 692 transitions, 12008 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 18:38:39,696 INFO L231 Difference]: Finished difference. Result has 346 places, 677 transitions, 10850 flow [2024-06-21 18:38:39,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10216, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10850, PETRI_PLACES=346, PETRI_TRANSITIONS=677} [2024-06-21 18:38:39,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 18:38:39,697 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 677 transitions, 10850 flow [2024-06-21 18:38:39,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:39,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:39,697 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 18:38:39,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:38:39,698 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 18:38:39,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 789974100, now seen corresponding path program 1 times [2024-06-21 18:38:39,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:39,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815516351] [2024-06-21 18:38:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815516351] [2024-06-21 18:38:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815516351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:41,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:41,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185553981] [2024-06-21 18:38:41,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:38:41,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 677 transitions, 10850 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:38:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:43,215 INFO L124 PetriNetUnfolderBase]: 3617/5810 cut-off events. [2024-06-21 18:38:43,215 INFO L125 PetriNetUnfolderBase]: For 594988/595100 co-relation queries the response was YES. [2024-06-21 18:38:43,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54415 conditions, 5810 events. 3617/5810 cut-off events. For 594988/595100 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35826 event pairs, 709 based on Foata normal form. 110/5834 useless extension candidates. Maximal degree in co-relation 54281. Up to 4829 conditions per place. [2024-06-21 18:38:43,295 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 87 changer transitions 0/698 dead transitions. [2024-06-21 18:38:43,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 698 transitions, 12260 flow [2024-06-21 18:38:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:38:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:38:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 18:38:43,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-21 18:38:43,297 INFO L175 Difference]: Start difference. First operand has 346 places, 677 transitions, 10850 flow. Second operand 8 states and 170 transitions. [2024-06-21 18:38:43,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 698 transitions, 12260 flow [2024-06-21 18:38:44,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 698 transitions, 11902 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:44,406 INFO L231 Difference]: Finished difference. Result has 349 places, 681 transitions, 10763 flow [2024-06-21 18:38:44,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10492, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10763, PETRI_PLACES=349, PETRI_TRANSITIONS=681} [2024-06-21 18:38:44,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-21 18:38:44,407 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 681 transitions, 10763 flow [2024-06-21 18:38:44,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:44,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:44,407 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 18:38:44,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:38:44,408 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 18:38:44,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash 255597341, now seen corresponding path program 3 times [2024-06-21 18:38:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:44,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906759374] [2024-06-21 18:38:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:46,034 INFO 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 18:38:46,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906759374] [2024-06-21 18:38:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906759374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:46,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:46,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:38:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090546525] [2024-06-21 18:38:46,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:46,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:38:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:38:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:38:46,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:38:46,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 681 transitions, 10763 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:46,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:46,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:38:46,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:47,722 INFO L124 PetriNetUnfolderBase]: 3880/6120 cut-off events. [2024-06-21 18:38:47,722 INFO L125 PetriNetUnfolderBase]: For 600632/600701 co-relation queries the response was YES. [2024-06-21 18:38:47,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57566 conditions, 6120 events. 3880/6120 cut-off events. For 600632/600701 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36741 event pairs, 718 based on Foata normal form. 71/6141 useless extension candidates. Maximal degree in co-relation 57430. Up to 5105 conditions per place. [2024-06-21 18:38:47,821 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 223 changer transitions 0/699 dead transitions. [2024-06-21 18:38:47,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 699 transitions, 12363 flow [2024-06-21 18:38:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:38:47,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:38:47,822 INFO L175 Difference]: Start difference. First operand has 349 places, 681 transitions, 10763 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:38:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 699 transitions, 12363 flow [2024-06-21 18:38:49,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 699 transitions, 12124 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 18:38:49,079 INFO L231 Difference]: Finished difference. Result has 352 places, 685 transitions, 11090 flow [2024-06-21 18:38:49,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11090, PETRI_PLACES=352, PETRI_TRANSITIONS=685} [2024-06-21 18:38:49,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-21 18:38:49,080 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 685 transitions, 11090 flow [2024-06-21 18:38:49,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:49,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:49,080 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 18:38:49,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:38:49,081 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:49,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:49,081 INFO L85 PathProgramCache]: Analyzing trace with hash -924622876, now seen corresponding path program 11 times [2024-06-21 18:38:49,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:49,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937293111] [2024-06-21 18:38:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:49,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:50,918 INFO 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 18:38:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937293111] [2024-06-21 18:38:50,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937293111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:50,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478301722] [2024-06-21 18:38:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:50,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:51,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:38:51,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 685 transitions, 11090 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:51,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:51,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:38:51,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:53,042 INFO L124 PetriNetUnfolderBase]: 4147/6510 cut-off events. [2024-06-21 18:38:53,042 INFO L125 PetriNetUnfolderBase]: For 628823/628831 co-relation queries the response was YES. [2024-06-21 18:38:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61066 conditions, 6510 events. 4147/6510 cut-off events. For 628823/628831 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38939 event pairs, 700 based on Foata normal form. 12/6521 useless extension candidates. Maximal degree in co-relation 60929. Up to 5296 conditions per place. [2024-06-21 18:38:53,141 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 508 selfloop transitions, 223 changer transitions 0/736 dead transitions. [2024-06-21 18:38:53,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 736 transitions, 13306 flow [2024-06-21 18:38:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 18:38:53,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-21 18:38:53,142 INFO L175 Difference]: Start difference. First operand has 352 places, 685 transitions, 11090 flow. Second operand 11 states and 212 transitions. [2024-06-21 18:38:53,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 736 transitions, 13306 flow [2024-06-21 18:38:54,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 736 transitions, 12770 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 18:38:54,579 INFO L231 Difference]: Finished difference. Result has 356 places, 695 transitions, 11245 flow [2024-06-21 18:38:54,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10554, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11245, PETRI_PLACES=356, PETRI_TRANSITIONS=695} [2024-06-21 18:38:54,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-21 18:38:54,580 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 695 transitions, 11245 flow [2024-06-21 18:38:54,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:54,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:54,580 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 18:38:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:38:54,580 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:54,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1397017834, now seen corresponding path program 12 times [2024-06-21 18:38:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:54,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454354034] [2024-06-21 18:38:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:54,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:56,253 INFO 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 18:38:56,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454354034] [2024-06-21 18:38:56,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454354034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:56,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:56,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:38:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329731817] [2024-06-21 18:38:56,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:56,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:38:56,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:38:56,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:38:56,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:38:56,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 695 transitions, 11245 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:56,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:56,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:38:56,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:58,375 INFO L124 PetriNetUnfolderBase]: 4139/6508 cut-off events. [2024-06-21 18:38:58,376 INFO L125 PetriNetUnfolderBase]: For 637998/638006 co-relation queries the response was YES. [2024-06-21 18:38:58,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60929 conditions, 6508 events. 4139/6508 cut-off events. For 637998/638006 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39047 event pairs, 713 based on Foata normal form. 12/6519 useless extension candidates. Maximal degree in co-relation 60791. Up to 5337 conditions per place. [2024-06-21 18:38:58,465 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 505 selfloop transitions, 222 changer transitions 0/732 dead transitions. [2024-06-21 18:38:58,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 732 transitions, 12971 flow [2024-06-21 18:38:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:38:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:38:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:38:58,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-21 18:38:58,467 INFO L175 Difference]: Start difference. First operand has 356 places, 695 transitions, 11245 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:38:58,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 732 transitions, 12971 flow [2024-06-21 18:38:59,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 732 transitions, 12626 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:59,828 INFO L231 Difference]: Finished difference. Result has 362 places, 695 transitions, 11351 flow [2024-06-21 18:38:59,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10900, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11351, PETRI_PLACES=362, PETRI_TRANSITIONS=695} [2024-06-21 18:38:59,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 18:38:59,829 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 695 transitions, 11351 flow [2024-06-21 18:38:59,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:59,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:59,829 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 18:38:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:38:59,830 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:38:59,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1257584522, now seen corresponding path program 13 times [2024-06-21 18:38:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:59,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209091318] [2024-06-21 18:38:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:01,567 INFO 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 18:39:01,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:01,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209091318] [2024-06-21 18:39:01,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209091318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:01,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:01,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:01,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719773258] [2024-06-21 18:39:01,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:01,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:01,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 695 transitions, 11351 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:01,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:01,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:01,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:03,487 INFO L124 PetriNetUnfolderBase]: 4181/6564 cut-off events. [2024-06-21 18:39:03,488 INFO L125 PetriNetUnfolderBase]: For 661776/661784 co-relation queries the response was YES. [2024-06-21 18:39:03,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62212 conditions, 6564 events. 4181/6564 cut-off events. For 661776/661784 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39386 event pairs, 697 based on Foata normal form. 12/6575 useless extension candidates. Maximal degree in co-relation 62073. Up to 5231 conditions per place. [2024-06-21 18:39:03,592 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 506 selfloop transitions, 229 changer transitions 0/740 dead transitions. [2024-06-21 18:39:03,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 740 transitions, 13499 flow [2024-06-21 18:39:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 18:39:03,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-21 18:39:03,594 INFO L175 Difference]: Start difference. First operand has 362 places, 695 transitions, 11351 flow. Second operand 11 states and 212 transitions. [2024-06-21 18:39:03,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 740 transitions, 13499 flow [2024-06-21 18:39:04,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 740 transitions, 13041 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:39:04,743 INFO L231 Difference]: Finished difference. Result has 363 places, 699 transitions, 11526 flow [2024-06-21 18:39:04,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10893, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11526, PETRI_PLACES=363, PETRI_TRANSITIONS=699} [2024-06-21 18:39:04,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 18:39:04,744 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 699 transitions, 11526 flow [2024-06-21 18:39:04,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:04,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:04,745 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 18:39:04,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:39:04,745 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:04,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1021112492, now seen corresponding path program 14 times [2024-06-21 18:39:04,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800705399] [2024-06-21 18:39:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:04,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:06,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800705399] [2024-06-21 18:39:06,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800705399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:06,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:06,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:06,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142399818] [2024-06-21 18:39:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:06,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:06,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:06,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:06,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 699 transitions, 11526 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:06,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:06,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:06,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:08,729 INFO L124 PetriNetUnfolderBase]: 4209/6607 cut-off events. [2024-06-21 18:39:08,729 INFO L125 PetriNetUnfolderBase]: For 681435/681443 co-relation queries the response was YES. [2024-06-21 18:39:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63067 conditions, 6607 events. 4209/6607 cut-off events. For 681435/681443 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 39716 event pairs, 701 based on Foata normal form. 12/6618 useless extension candidates. Maximal degree in co-relation 62927. Up to 5442 conditions per place. [2024-06-21 18:39:08,842 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 499 selfloop transitions, 233 changer transitions 0/737 dead transitions. [2024-06-21 18:39:08,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 737 transitions, 13326 flow [2024-06-21 18:39:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 18:39:08,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355179704016913 [2024-06-21 18:39:08,844 INFO L175 Difference]: Start difference. First operand has 363 places, 699 transitions, 11526 flow. Second operand 11 states and 206 transitions. [2024-06-21 18:39:08,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 737 transitions, 13326 flow [2024-06-21 18:39:10,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 737 transitions, 12974 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 18:39:10,431 INFO L231 Difference]: Finished difference. Result has 367 places, 704 transitions, 11777 flow [2024-06-21 18:39:10,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11185, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11777, PETRI_PLACES=367, PETRI_TRANSITIONS=704} [2024-06-21 18:39:10,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-21 18:39:10,432 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 704 transitions, 11777 flow [2024-06-21 18:39:10,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:10,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:10,433 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 18:39:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:39:10,433 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:10,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1027368602, now seen corresponding path program 15 times [2024-06-21 18:39:10,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:10,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934881866] [2024-06-21 18:39:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:12,112 INFO 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 18:39:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:12,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934881866] [2024-06-21 18:39:12,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934881866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:12,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:12,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:12,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499230280] [2024-06-21 18:39:12,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:12,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:12,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:12,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:12,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 704 transitions, 11777 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:12,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:12,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:12,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:14,243 INFO L124 PetriNetUnfolderBase]: 4226/6634 cut-off events. [2024-06-21 18:39:14,244 INFO L125 PetriNetUnfolderBase]: For 695546/695554 co-relation queries the response was YES. [2024-06-21 18:39:14,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63801 conditions, 6634 events. 4226/6634 cut-off events. For 695546/695554 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 39903 event pairs, 706 based on Foata normal form. 12/6645 useless extension candidates. Maximal degree in co-relation 63659. Up to 5469 conditions per place. [2024-06-21 18:39:14,344 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 509 selfloop transitions, 227 changer transitions 0/741 dead transitions. [2024-06-21 18:39:14,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 741 transitions, 13573 flow [2024-06-21 18:39:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:39:14,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-21 18:39:14,346 INFO L175 Difference]: Start difference. First operand has 367 places, 704 transitions, 11777 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:39:14,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 741 transitions, 13573 flow [2024-06-21 18:39:15,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 741 transitions, 12890 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 18:39:15,766 INFO L231 Difference]: Finished difference. Result has 369 places, 706 transitions, 11641 flow [2024-06-21 18:39:15,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11094, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11641, PETRI_PLACES=369, PETRI_TRANSITIONS=706} [2024-06-21 18:39:15,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 18:39:15,767 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 706 transitions, 11641 flow [2024-06-21 18:39:15,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:15,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:15,767 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 18:39:15,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:39:15,767 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:15,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1027607612, now seen corresponding path program 16 times [2024-06-21 18:39:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:15,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581365840] [2024-06-21 18:39:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:17,603 INFO 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 18:39:17,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581365840] [2024-06-21 18:39:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581365840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:17,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070239329] [2024-06-21 18:39:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:17,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:17,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 706 transitions, 11641 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:17,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:17,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:17,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:19,644 INFO L124 PetriNetUnfolderBase]: 4218/6622 cut-off events. [2024-06-21 18:39:19,644 INFO L125 PetriNetUnfolderBase]: For 700969/700977 co-relation queries the response was YES. [2024-06-21 18:39:19,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63347 conditions, 6622 events. 4218/6622 cut-off events. For 700969/700977 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 39804 event pairs, 699 based on Foata normal form. 12/6633 useless extension candidates. Maximal degree in co-relation 63204. Up to 5392 conditions per place. [2024-06-21 18:39:19,745 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 507 selfloop transitions, 230 changer transitions 0/742 dead transitions. [2024-06-21 18:39:19,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 742 transitions, 13359 flow [2024-06-21 18:39:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:39:19,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-21 18:39:19,747 INFO L175 Difference]: Start difference. First operand has 369 places, 706 transitions, 11641 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:39:19,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 742 transitions, 13359 flow [2024-06-21 18:39:21,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 742 transitions, 12791 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-21 18:39:21,171 INFO L231 Difference]: Finished difference. Result has 372 places, 706 transitions, 11540 flow [2024-06-21 18:39:21,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11073, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11540, PETRI_PLACES=372, PETRI_TRANSITIONS=706} [2024-06-21 18:39:21,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 18:39:21,172 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 706 transitions, 11540 flow [2024-06-21 18:39:21,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:21,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:21,172 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 18:39:21,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:39:21,173 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:21,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash 352081768, now seen corresponding path program 17 times [2024-06-21 18:39:21,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:21,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913263533] [2024-06-21 18:39:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:21,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:23,235 INFO 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 18:39:23,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913263533] [2024-06-21 18:39:23,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913263533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:23,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:23,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:23,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793642909] [2024-06-21 18:39:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:23,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:23,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:23,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:23,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 706 transitions, 11540 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:23,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:23,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:23,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:25,309 INFO L124 PetriNetUnfolderBase]: 4235/6654 cut-off events. [2024-06-21 18:39:25,309 INFO L125 PetriNetUnfolderBase]: For 715148/715156 co-relation queries the response was YES. [2024-06-21 18:39:25,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63562 conditions, 6654 events. 4235/6654 cut-off events. For 715148/715156 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 40045 event pairs, 711 based on Foata normal form. 12/6665 useless extension candidates. Maximal degree in co-relation 63418. Up to 5484 conditions per place. [2024-06-21 18:39:25,400 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 487 selfloop transitions, 247 changer transitions 0/739 dead transitions. [2024-06-21 18:39:25,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 739 transitions, 13264 flow [2024-06-21 18:39:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 18:39:25,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334038054968288 [2024-06-21 18:39:25,402 INFO L175 Difference]: Start difference. First operand has 372 places, 706 transitions, 11540 flow. Second operand 11 states and 205 transitions. [2024-06-21 18:39:25,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 739 transitions, 13264 flow [2024-06-21 18:39:26,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 739 transitions, 12576 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 18:39:26,897 INFO L231 Difference]: Finished difference. Result has 372 places, 708 transitions, 11439 flow [2024-06-21 18:39:26,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10852, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11439, PETRI_PLACES=372, PETRI_TRANSITIONS=708} [2024-06-21 18:39:26,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 18:39:26,898 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 708 transitions, 11439 flow [2024-06-21 18:39:26,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:26,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:26,899 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 18:39:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:39:26,899 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:26,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash 360652648, now seen corresponding path program 18 times [2024-06-21 18:39:26,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:26,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232278273] [2024-06-21 18:39:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:28,628 INFO 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 18:39:28,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:28,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232278273] [2024-06-21 18:39:28,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232278273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:28,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:28,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:28,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678932397] [2024-06-21 18:39:28,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:28,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:28,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:28,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 708 transitions, 11439 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:28,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:28,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:28,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:30,670 INFO L124 PetriNetUnfolderBase]: 4277/6730 cut-off events. [2024-06-21 18:39:30,671 INFO L125 PetriNetUnfolderBase]: For 746117/746125 co-relation queries the response was YES. [2024-06-21 18:39:30,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64349 conditions, 6730 events. 4277/6730 cut-off events. For 746117/746125 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40660 event pairs, 725 based on Foata normal form. 12/6741 useless extension candidates. Maximal degree in co-relation 64205. Up to 5430 conditions per place. [2024-06-21 18:39:30,770 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 493 selfloop transitions, 251 changer transitions 0/749 dead transitions. [2024-06-21 18:39:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 749 transitions, 13567 flow [2024-06-21 18:39:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 18:39:30,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-21 18:39:30,771 INFO L175 Difference]: Start difference. First operand has 372 places, 708 transitions, 11439 flow. Second operand 11 states and 211 transitions. [2024-06-21 18:39:30,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 749 transitions, 13567 flow [2024-06-21 18:39:32,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 749 transitions, 13131 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-21 18:39:32,416 INFO L231 Difference]: Finished difference. Result has 375 places, 712 transitions, 11688 flow [2024-06-21 18:39:32,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11003, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11688, PETRI_PLACES=375, PETRI_TRANSITIONS=712} [2024-06-21 18:39:32,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-21 18:39:32,417 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 712 transitions, 11688 flow [2024-06-21 18:39:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:32,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:32,418 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 18:39:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:39:32,418 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:32,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1061919720, now seen corresponding path program 19 times [2024-06-21 18:39:32,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:32,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989550064] [2024-06-21 18:39:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:32,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:34,011 INFO 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 18:39:34,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:34,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989550064] [2024-06-21 18:39:34,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989550064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:34,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:34,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:34,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505659265] [2024-06-21 18:39:34,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:34,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:34,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:34,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 712 transitions, 11688 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:34,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:34,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:34,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:36,037 INFO L124 PetriNetUnfolderBase]: 4269/6718 cut-off events. [2024-06-21 18:39:36,038 INFO L125 PetriNetUnfolderBase]: For 756741/756749 co-relation queries the response was YES. [2024-06-21 18:39:36,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64150 conditions, 6718 events. 4269/6718 cut-off events. For 756741/756749 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40585 event pairs, 726 based on Foata normal form. 12/6729 useless extension candidates. Maximal degree in co-relation 64007. Up to 5491 conditions per place. [2024-06-21 18:39:36,154 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 492 selfloop transitions, 248 changer transitions 0/745 dead transitions. [2024-06-21 18:39:36,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 745 transitions, 13360 flow [2024-06-21 18:39:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:39:36,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-21 18:39:36,156 INFO L175 Difference]: Start difference. First operand has 375 places, 712 transitions, 11688 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:39:36,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 745 transitions, 13360 flow [2024-06-21 18:39:37,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 745 transitions, 12910 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-21 18:39:37,801 INFO L231 Difference]: Finished difference. Result has 379 places, 712 transitions, 11741 flow [2024-06-21 18:39:37,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11238, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11741, PETRI_PLACES=379, PETRI_TRANSITIONS=712} [2024-06-21 18:39:37,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 18:39:37,802 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 712 transitions, 11741 flow [2024-06-21 18:39:37,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:37,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:37,802 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 18:39:37,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:39:37,803 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:39:37,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1837692776, now seen corresponding path program 20 times [2024-06-21 18:39:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598751739] [2024-06-21 18:39:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:39,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:39,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598751739] [2024-06-21 18:39:39,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598751739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:39,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:39,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476194906] [2024-06-21 18:39:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:39,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:39,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:39:39,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 712 transitions, 11741 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:39,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:39,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:39:39,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:41,572 INFO L124 PetriNetUnfolderBase]: 4286/6735 cut-off events. [2024-06-21 18:39:41,572 INFO L125 PetriNetUnfolderBase]: For 771549/771557 co-relation queries the response was YES. [2024-06-21 18:39:41,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64853 conditions, 6735 events. 4286/6735 cut-off events. For 771549/771557 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 40641 event pairs, 615 based on Foata normal form. 12/6746 useless extension candidates. Maximal degree in co-relation 64708. Up to 4523 conditions per place. [2024-06-21 18:39:41,667 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 435 selfloop transitions, 312 changer transitions 0/752 dead transitions. [2024-06-21 18:39:41,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 752 transitions, 13863 flow [2024-06-21 18:39:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:39:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:39:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:39:41,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 18:39:41,669 INFO L175 Difference]: Start difference. First operand has 379 places, 712 transitions, 11741 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:39:41,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 752 transitions, 13863 flow [2024-06-21 18:39:43,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 752 transitions, 13345 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 18:39:43,367 INFO L231 Difference]: Finished difference. Result has 380 places, 716 transitions, 12038 flow [2024-06-21 18:39:43,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12038, PETRI_PLACES=380, PETRI_TRANSITIONS=716} [2024-06-21 18:39:43,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 18:39:43,368 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 716 transitions, 12038 flow [2024-06-21 18:39:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:43,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:43,368 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 18:39:43,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:39:43,368 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 18:39:43,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash 717585492, now seen corresponding path program 2 times [2024-06-21 18:39:43,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:43,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693360079] [2024-06-21 18:39:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:43,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:45,022 INFO 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 18:39:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693360079] [2024-06-21 18:39:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693360079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:45,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:45,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:39:45,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975146220] [2024-06-21 18:39:45,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:45,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:39:45,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:39:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:39:45,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:39:45,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 716 transitions, 12038 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:45,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:45,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:39:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:46,720 INFO L124 PetriNetUnfolderBase]: 3786/6118 cut-off events. [2024-06-21 18:39:46,720 INFO L125 PetriNetUnfolderBase]: For 806551/806650 co-relation queries the response was YES. [2024-06-21 18:39:46,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61628 conditions, 6118 events. 3786/6118 cut-off events. For 806551/806650 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 38320 event pairs, 709 based on Foata normal form. 103/6119 useless extension candidates. Maximal degree in co-relation 61482. Up to 5120 conditions per place. [2024-06-21 18:39:46,820 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 506 selfloop transitions, 91 changer transitions 0/733 dead transitions. [2024-06-21 18:39:46,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 733 transitions, 13684 flow [2024-06-21 18:39:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:39:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:39:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 18:39:46,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-21 18:39:46,821 INFO L175 Difference]: Start difference. First operand has 380 places, 716 transitions, 12038 flow. Second operand 7 states and 154 transitions. [2024-06-21 18:39:46,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 733 transitions, 13684 flow [2024-06-21 18:39:48,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 733 transitions, 13283 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 18:39:48,489 INFO L231 Difference]: Finished difference. Result has 380 places, 720 transitions, 11926 flow [2024-06-21 18:39:48,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11637, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11926, PETRI_PLACES=380, PETRI_TRANSITIONS=720} [2024-06-21 18:39:48,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 18:39:48,490 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 720 transitions, 11926 flow [2024-06-21 18:39:48,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:48,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:48,491 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 18:39:48,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:39:48,491 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 18:39:48,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash -322061887, now seen corresponding path program 4 times [2024-06-21 18:39:48,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:48,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325399101] [2024-06-21 18:39:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:48,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:50,931 INFO 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 18:39:50,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:50,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325399101] [2024-06-21 18:39:50,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325399101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:50,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:50,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:39:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225550596] [2024-06-21 18:39:50,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:50,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:39:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:39:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:39:51,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:39:51,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 720 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:51,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:51,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:39:51,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:52,765 INFO L124 PetriNetUnfolderBase]: 4166/6564 cut-off events. [2024-06-21 18:39:52,766 INFO L125 PetriNetUnfolderBase]: For 830437/830507 co-relation queries the response was YES. [2024-06-21 18:39:52,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66004 conditions, 6564 events. 4166/6564 cut-off events. For 830437/830507 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 39878 event pairs, 802 based on Foata normal form. 71/6568 useless extension candidates. Maximal degree in co-relation 65857. Up to 5485 conditions per place. [2024-06-21 18:39:52,869 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 448 selfloop transitions, 255 changer transitions 0/747 dead transitions. [2024-06-21 18:39:52,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 747 transitions, 14292 flow [2024-06-21 18:39:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:39:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:39:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:39:52,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 18:39:52,871 INFO L175 Difference]: Start difference. First operand has 380 places, 720 transitions, 11926 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:39:52,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 747 transitions, 14292 flow [2024-06-21 18:39:54,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 747 transitions, 14031 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 18:39:54,572 INFO L231 Difference]: Finished difference. Result has 384 places, 734 transitions, 12628 flow [2024-06-21 18:39:54,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11665, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12628, PETRI_PLACES=384, PETRI_TRANSITIONS=734} [2024-06-21 18:39:54,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-21 18:39:54,573 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 734 transitions, 12628 flow [2024-06-21 18:39:54,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:54,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:54,573 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 18:39:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:39:54,574 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 18:39:54,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash 732317622, now seen corresponding path program 3 times [2024-06-21 18:39:54,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:54,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026177189] [2024-06-21 18:39:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:56,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026177189] [2024-06-21 18:39:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026177189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:56,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:56,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:39:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682663044] [2024-06-21 18:39:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:56,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:39:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:39:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:39:56,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:39:56,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 734 transitions, 12628 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:56,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:56,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:39:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:58,631 INFO L124 PetriNetUnfolderBase]: 3881/6261 cut-off events. [2024-06-21 18:39:58,631 INFO L125 PetriNetUnfolderBase]: For 869861/869960 co-relation queries the response was YES. [2024-06-21 18:39:58,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64968 conditions, 6261 events. 3881/6261 cut-off events. For 869861/869960 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 39353 event pairs, 712 based on Foata normal form. 103/6262 useless extension candidates. Maximal degree in co-relation 64819. Up to 5079 conditions per place. [2024-06-21 18:39:58,726 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 498 selfloop transitions, 119 changer transitions 0/757 dead transitions. [2024-06-21 18:39:58,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 757 transitions, 14442 flow [2024-06-21 18:39:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:39:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:39:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-21 18:39:58,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:39:58,727 INFO L175 Difference]: Start difference. First operand has 384 places, 734 transitions, 12628 flow. Second operand 8 states and 172 transitions. [2024-06-21 18:39:58,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 757 transitions, 14442 flow [2024-06-21 18:40:00,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 757 transitions, 14074 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-21 18:40:00,740 INFO L231 Difference]: Finished difference. Result has 388 places, 742 transitions, 12721 flow [2024-06-21 18:40:00,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12721, PETRI_PLACES=388, PETRI_TRANSITIONS=742} [2024-06-21 18:40:00,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 18:40:00,741 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 742 transitions, 12721 flow [2024-06-21 18:40:00,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:00,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:00,742 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 18:40:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:40:00,742 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 18:40:00,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 732317157, now seen corresponding path program 5 times [2024-06-21 18:40:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899266533] [2024-06-21 18:40:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:40:02,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:02,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899266533] [2024-06-21 18:40:02,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899266533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:02,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:02,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:40:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737907493] [2024-06-21 18:40:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:40:02,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:40:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:40:02,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:40:02,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 742 transitions, 12721 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:02,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:02,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:40:02,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:04,311 INFO L124 PetriNetUnfolderBase]: 4229/6654 cut-off events. [2024-06-21 18:40:04,311 INFO L125 PetriNetUnfolderBase]: For 883195/883265 co-relation queries the response was YES. [2024-06-21 18:40:04,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68753 conditions, 6654 events. 4229/6654 cut-off events. For 883195/883265 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40372 event pairs, 809 based on Foata normal form. 71/6658 useless extension candidates. Maximal degree in co-relation 68603. Up to 5431 conditions per place. [2024-06-21 18:40:04,422 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 431 selfloop transitions, 287 changer transitions 0/762 dead transitions. [2024-06-21 18:40:04,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 762 transitions, 14779 flow [2024-06-21 18:40:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:40:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:40:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:40:04,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 18:40:04,424 INFO L175 Difference]: Start difference. First operand has 388 places, 742 transitions, 12721 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:40:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 762 transitions, 14779 flow [2024-06-21 18:40:06,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 762 transitions, 14523 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 18:40:06,531 INFO L231 Difference]: Finished difference. Result has 393 places, 750 transitions, 13306 flow [2024-06-21 18:40:06,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12465, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13306, PETRI_PLACES=393, PETRI_TRANSITIONS=750} [2024-06-21 18:40:06,532 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-21 18:40:06,532 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 750 transitions, 13306 flow [2024-06-21 18:40:06,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:06,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:06,532 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 18:40:06,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:40:06,533 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 18:40:06,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash -307314412, now seen corresponding path program 4 times [2024-06-21 18:40:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:06,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588837004] [2024-06-21 18:40:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:06,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:09,034 INFO 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 18:40:09,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:09,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588837004] [2024-06-21 18:40:09,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588837004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:09,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:09,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:40:09,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011411952] [2024-06-21 18:40:09,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:40:09,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:40:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:40:09,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:40:09,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 750 transitions, 13306 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:09,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:09,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:40:09,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:11,098 INFO L124 PetriNetUnfolderBase]: 3862/6218 cut-off events. [2024-06-21 18:40:11,098 INFO L125 PetriNetUnfolderBase]: For 904630/904739 co-relation queries the response was YES. [2024-06-21 18:40:11,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66319 conditions, 6218 events. 3862/6218 cut-off events. For 904630/904739 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39002 event pairs, 866 based on Foata normal form. 106/6193 useless extension candidates. Maximal degree in co-relation 66167. Up to 5355 conditions per place. [2024-06-21 18:40:11,195 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 586 selfloop transitions, 34 changer transitions 0/762 dead transitions. [2024-06-21 18:40:11,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 762 transitions, 14588 flow [2024-06-21 18:40:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:40:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:40:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:40:11,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 18:40:11,197 INFO L175 Difference]: Start difference. First operand has 393 places, 750 transitions, 13306 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:40:11,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 762 transitions, 14588 flow [2024-06-21 18:40:13,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 762 transitions, 14066 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-21 18:40:13,394 INFO L231 Difference]: Finished difference. Result has 397 places, 750 transitions, 12859 flow [2024-06-21 18:40:13,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12784, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12859, PETRI_PLACES=397, PETRI_TRANSITIONS=750} [2024-06-21 18:40:13,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-21 18:40:13,395 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 750 transitions, 12859 flow [2024-06-21 18:40:13,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:13,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:13,395 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 18:40:13,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:40:13,395 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 18:40:13,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash -322075310, now seen corresponding path program 4 times [2024-06-21 18:40:13,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:13,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501180932] [2024-06-21 18:40:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:13,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:14,830 INFO 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 18:40:14,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501180932] [2024-06-21 18:40:14,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501180932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:14,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:40:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557519398] [2024-06-21 18:40:14,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:40:14,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:40:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:40:14,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:40:14,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 750 transitions, 12859 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:14,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:14,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:40:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:16,523 INFO L124 PetriNetUnfolderBase]: 4224/6684 cut-off events. [2024-06-21 18:40:16,523 INFO L125 PetriNetUnfolderBase]: For 893113/893180 co-relation queries the response was YES. [2024-06-21 18:40:16,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69121 conditions, 6684 events. 4224/6684 cut-off events. For 893113/893180 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40845 event pairs, 748 based on Foata normal form. 68/6706 useless extension candidates. Maximal degree in co-relation 68967. Up to 5718 conditions per place. [2024-06-21 18:40:16,639 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 566 selfloop transitions, 157 changer transitions 0/767 dead transitions. [2024-06-21 18:40:16,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 767 transitions, 14697 flow [2024-06-21 18:40:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:40:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:40:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 18:40:16,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 18:40:16,641 INFO L175 Difference]: Start difference. First operand has 397 places, 750 transitions, 12859 flow. Second operand 9 states and 164 transitions. [2024-06-21 18:40:16,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 767 transitions, 14697 flow [2024-06-21 18:40:18,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 767 transitions, 14544 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:40:18,646 INFO L231 Difference]: Finished difference. Result has 397 places, 756 transitions, 13216 flow [2024-06-21 18:40:18,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12706, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13216, PETRI_PLACES=397, PETRI_TRANSITIONS=756} [2024-06-21 18:40:18,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-21 18:40:18,647 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 756 transitions, 13216 flow [2024-06-21 18:40:18,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:18,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:18,647 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 18:40:18,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:40:18,647 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 18:40:18,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 717572007, now seen corresponding path program 6 times [2024-06-21 18:40:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:18,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024747801] [2024-06-21 18:40:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:20,193 INFO 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 18:40:20,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:20,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024747801] [2024-06-21 18:40:20,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024747801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:20,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:20,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:40:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149662048] [2024-06-21 18:40:20,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:20,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:40:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:40:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:40:20,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:40:20,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 756 transitions, 13216 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:20,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:20,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:40:20,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:22,197 INFO L124 PetriNetUnfolderBase]: 4214/6625 cut-off events. [2024-06-21 18:40:22,197 INFO L125 PetriNetUnfolderBase]: For 910815/910885 co-relation queries the response was YES. [2024-06-21 18:40:22,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69472 conditions, 6625 events. 4214/6625 cut-off events. For 910815/910885 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40138 event pairs, 793 based on Foata normal form. 71/6629 useless extension candidates. Maximal degree in co-relation 69318. Up to 5580 conditions per place. [2024-06-21 18:40:22,297 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 249 changer transitions 0/769 dead transitions. [2024-06-21 18:40:22,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 769 transitions, 15220 flow [2024-06-21 18:40:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:40:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:40:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:40:22,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 18:40:22,298 INFO L175 Difference]: Start difference. First operand has 397 places, 756 transitions, 13216 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:40:22,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 769 transitions, 15220 flow [2024-06-21 18:40:24,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 769 transitions, 14933 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-21 18:40:24,422 INFO L231 Difference]: Finished difference. Result has 401 places, 756 transitions, 13435 flow [2024-06-21 18:40:24,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12929, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13435, PETRI_PLACES=401, PETRI_TRANSITIONS=756} [2024-06-21 18:40:24,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-21 18:40:24,423 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 756 transitions, 13435 flow [2024-06-21 18:40:24,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:24,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:24,424 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 18:40:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:40:24,424 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:40:24,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1067532526, now seen corresponding path program 3 times [2024-06-21 18:40:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887024302] [2024-06-21 18:40:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:25,750 INFO 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 18:40:25,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:25,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887024302] [2024-06-21 18:40:25,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887024302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:25,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:25,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:40:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936179891] [2024-06-21 18:40:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:40:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:40:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:40:25,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:40:25,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 756 transitions, 13435 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:25,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:25,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:40:25,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:28,116 INFO L124 PetriNetUnfolderBase]: 4555/7161 cut-off events. [2024-06-21 18:40:28,116 INFO L125 PetriNetUnfolderBase]: For 968936/968940 co-relation queries the response was YES. [2024-06-21 18:40:28,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73381 conditions, 7161 events. 4555/7161 cut-off events. For 968936/968940 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 43983 event pairs, 802 based on Foata normal form. 24/7184 useless extension candidates. Maximal degree in co-relation 73225. Up to 6302 conditions per place. [2024-06-21 18:40:28,245 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 667 selfloop transitions, 130 changer transitions 0/802 dead transitions. [2024-06-21 18:40:28,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 802 transitions, 15391 flow [2024-06-21 18:40:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:40:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:40:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-21 18:40:28,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-21 18:40:28,247 INFO L175 Difference]: Start difference. First operand has 401 places, 756 transitions, 13435 flow. Second operand 11 states and 216 transitions. [2024-06-21 18:40:28,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 802 transitions, 15391 flow [2024-06-21 18:40:30,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 802 transitions, 14869 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:40:30,801 INFO L231 Difference]: Finished difference. Result has 404 places, 758 transitions, 13269 flow [2024-06-21 18:40:30,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12913, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13269, PETRI_PLACES=404, PETRI_TRANSITIONS=758} [2024-06-21 18:40:30,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-21 18:40:30,802 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 758 transitions, 13269 flow [2024-06-21 18:40:30,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:30,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:30,803 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 18:40:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:40:30,803 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:40:30,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash -473398256, now seen corresponding path program 4 times [2024-06-21 18:40:30,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:30,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933617446] [2024-06-21 18:40:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:31,927 INFO 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 18:40:31,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:31,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933617446] [2024-06-21 18:40:31,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933617446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:31,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:31,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:40:31,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962580325] [2024-06-21 18:40:31,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:40:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:40:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:40:32,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:40:32,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 758 transitions, 13269 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:32,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:32,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:40:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:34,454 INFO L124 PetriNetUnfolderBase]: 4925/7772 cut-off events. [2024-06-21 18:40:34,454 INFO L125 PetriNetUnfolderBase]: For 1075834/1075840 co-relation queries the response was YES. [2024-06-21 18:40:34,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80825 conditions, 7772 events. 4925/7772 cut-off events. For 1075834/1075840 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48689 event pairs, 780 based on Foata normal form. 22/7793 useless extension candidates. Maximal degree in co-relation 80668. Up to 6366 conditions per place. [2024-06-21 18:40:34,581 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 637 selfloop transitions, 202 changer transitions 0/844 dead transitions. [2024-06-21 18:40:34,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 844 transitions, 16148 flow [2024-06-21 18:40:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 18:40:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 18:40:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 294 transitions. [2024-06-21 18:40:34,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:40:34,583 INFO L175 Difference]: Start difference. First operand has 404 places, 758 transitions, 13269 flow. Second operand 15 states and 294 transitions. [2024-06-21 18:40:34,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 844 transitions, 16148 flow [2024-06-21 18:40:37,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 844 transitions, 15813 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-21 18:40:37,918 INFO L231 Difference]: Finished difference. Result has 411 places, 771 transitions, 13769 flow [2024-06-21 18:40:37,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12979, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13769, PETRI_PLACES=411, PETRI_TRANSITIONS=771} [2024-06-21 18:40:37,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-21 18:40:37,919 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 771 transitions, 13769 flow [2024-06-21 18:40:37,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:37,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:37,920 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 18:40:37,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:40:37,920 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:40:37,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:37,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1558649010, now seen corresponding path program 5 times [2024-06-21 18:40:37,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:37,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870996370] [2024-06-21 18:40:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:37,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:38,720 INFO 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 18:40:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870996370] [2024-06-21 18:40:38,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870996370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:38,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:38,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:40:38,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060554548] [2024-06-21 18:40:38,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:38,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:40:38,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:40:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:40:38,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:40:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 771 transitions, 13769 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:38,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:38,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:40:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:41,155 INFO L124 PetriNetUnfolderBase]: 4612/7762 cut-off events. [2024-06-21 18:40:41,156 INFO L125 PetriNetUnfolderBase]: For 1225769/1226404 co-relation queries the response was YES. [2024-06-21 18:40:41,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82345 conditions, 7762 events. 4612/7762 cut-off events. For 1225769/1226404 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 53452 event pairs, 588 based on Foata normal form. 118/7765 useless extension candidates. Maximal degree in co-relation 82186. Up to 4974 conditions per place. [2024-06-21 18:40:41,289 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 531 selfloop transitions, 174 changer transitions 0/858 dead transitions. [2024-06-21 18:40:41,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 858 transitions, 16663 flow [2024-06-21 18:40:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 18:40:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 18:40:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-21 18:40:41,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132890365448505 [2024-06-21 18:40:41,291 INFO L175 Difference]: Start difference. First operand has 411 places, 771 transitions, 13769 flow. Second operand 14 states and 309 transitions. [2024-06-21 18:40:41,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 858 transitions, 16663 flow [2024-06-21 18:40:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 858 transitions, 16350 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-21 18:40:44,714 INFO L231 Difference]: Finished difference. Result has 418 places, 791 transitions, 14710 flow [2024-06-21 18:40:44,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13464, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14710, PETRI_PLACES=418, PETRI_TRANSITIONS=791} [2024-06-21 18:40:44,715 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-21 18:40:44,715 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 791 transitions, 14710 flow [2024-06-21 18:40:44,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:44,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:44,715 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 18:40:44,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:40:44,715 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:40:44,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash -144990132, now seen corresponding path program 6 times [2024-06-21 18:40:44,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:44,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693794439] [2024-06-21 18:40:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:44,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:45,856 INFO 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 18:40:45,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:45,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693794439] [2024-06-21 18:40:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693794439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:45,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:45,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:40:45,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471407419] [2024-06-21 18:40:45,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:45,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:40:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:40:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:40:46,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:40:46,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 791 transitions, 14710 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:46,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:46,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:40:46,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:40:49,057 INFO L124 PetriNetUnfolderBase]: 6108/9798 cut-off events. [2024-06-21 18:40:49,057 INFO L125 PetriNetUnfolderBase]: For 1496173/1496179 co-relation queries the response was YES. [2024-06-21 18:40:49,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106548 conditions, 9798 events. 6108/9798 cut-off events. For 1496173/1496179 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 65608 event pairs, 1567 based on Foata normal form. 30/9827 useless extension candidates. Maximal degree in co-relation 106383. Up to 8140 conditions per place. [2024-06-21 18:40:49,247 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 714 selfloop transitions, 152 changer transitions 0/871 dead transitions. [2024-06-21 18:40:49,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 871 transitions, 18178 flow [2024-06-21 18:40:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:40:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:40:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-21 18:40:49,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2024-06-21 18:40:49,248 INFO L175 Difference]: Start difference. First operand has 418 places, 791 transitions, 14710 flow. Second operand 12 states and 239 transitions. [2024-06-21 18:40:49,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 871 transitions, 18178 flow [2024-06-21 18:40:55,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 871 transitions, 17110 flow, removed 490 selfloop flow, removed 6 redundant places. [2024-06-21 18:40:55,455 INFO L231 Difference]: Finished difference. Result has 425 places, 812 transitions, 14980 flow [2024-06-21 18:40:55,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14130, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14980, PETRI_PLACES=425, PETRI_TRANSITIONS=812} [2024-06-21 18:40:55,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-21 18:40:55,456 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 812 transitions, 14980 flow [2024-06-21 18:40:55,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:55,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:40:55,456 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 18:40:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:40:55,457 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:40:55,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:40:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash -31310652, now seen corresponding path program 7 times [2024-06-21 18:40:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:40:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087588834] [2024-06-21 18:40:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:40:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:40:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:40:56,968 INFO 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 18:40:56,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:40:56,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087588834] [2024-06-21 18:40:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087588834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:40:56,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:40:56,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:40:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297519547] [2024-06-21 18:40:56,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:40:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:40:56,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:40:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:40:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:40:57,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:40:57,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 812 transitions, 14980 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:40:57,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:40:57,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:40:57,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:41:00,243 INFO L124 PetriNetUnfolderBase]: 6026/9686 cut-off events. [2024-06-21 18:41:00,243 INFO L125 PetriNetUnfolderBase]: For 1216782/1216788 co-relation queries the response was YES. [2024-06-21 18:41:00,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96929 conditions, 9686 events. 6026/9686 cut-off events. For 1216782/1216788 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 64844 event pairs, 1678 based on Foata normal form. 46/9731 useless extension candidates. Maximal degree in co-relation 96761. Up to 8459 conditions per place. [2024-06-21 18:41:00,386 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 714 selfloop transitions, 137 changer transitions 0/856 dead transitions. [2024-06-21 18:41:00,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 856 transitions, 16957 flow [2024-06-21 18:41:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:41:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:41:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-21 18:41:00,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-21 18:41:00,387 INFO L175 Difference]: Start difference. First operand has 425 places, 812 transitions, 14980 flow. Second operand 11 states and 216 transitions. [2024-06-21 18:41:00,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 856 transitions, 16957 flow [2024-06-21 18:41:02,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 856 transitions, 16661 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-21 18:41:02,719 INFO L231 Difference]: Finished difference. Result has 427 places, 810 transitions, 14955 flow [2024-06-21 18:41:02,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14657, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14955, PETRI_PLACES=427, PETRI_TRANSITIONS=810} [2024-06-21 18:41:02,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-21 18:41:02,720 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 810 transitions, 14955 flow [2024-06-21 18:41:02,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:02,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:41:02,720 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 18:41:02,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:41:02,720 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:41:02,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:41:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1320806182, now seen corresponding path program 8 times [2024-06-21 18:41:02,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:41:02,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990569663] [2024-06-21 18:41:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:41:02,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:41:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:41:04,130 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 18:41:04,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:41:04,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990569663] [2024-06-21 18:41:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990569663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:41:04,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:41:04,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:41:04,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527388091] [2024-06-21 18:41:04,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:41:04,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:41:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:41:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:41:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:41:04,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:41:04,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 810 transitions, 14955 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:04,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:41:04,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:41:04,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:41:07,712 INFO L124 PetriNetUnfolderBase]: 6336/10215 cut-off events. [2024-06-21 18:41:07,713 INFO L125 PetriNetUnfolderBase]: For 1212311/1212315 co-relation queries the response was YES. [2024-06-21 18:41:07,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100712 conditions, 10215 events. 6336/10215 cut-off events. For 1212311/1212315 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 69365 event pairs, 1680 based on Foata normal form. 28/10242 useless extension candidates. Maximal degree in co-relation 100543. Up to 8557 conditions per place. [2024-06-21 18:41:07,861 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 725 selfloop transitions, 150 changer transitions 0/880 dead transitions. [2024-06-21 18:41:07,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 880 transitions, 17431 flow [2024-06-21 18:41:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:41:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:41:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-21 18:41:07,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 18:41:07,863 INFO L175 Difference]: Start difference. First operand has 427 places, 810 transitions, 14955 flow. Second operand 12 states and 237 transitions. [2024-06-21 18:41:07,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 880 transitions, 17431 flow [2024-06-21 18:41:11,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 880 transitions, 17192 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 18:41:11,928 INFO L231 Difference]: Finished difference. Result has 432 places, 826 transitions, 15427 flow [2024-06-21 18:41:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14716, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15427, PETRI_PLACES=432, PETRI_TRANSITIONS=826} [2024-06-21 18:41:11,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-21 18:41:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 826 transitions, 15427 flow [2024-06-21 18:41:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:11,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:41:11,929 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 18:41:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:41:11,929 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:41:11,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:41:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash 658145094, now seen corresponding path program 21 times [2024-06-21 18:41:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:41:11,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801437784] [2024-06-21 18:41:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:41:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:41:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:41:13,455 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 18:41:13,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:41:13,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801437784] [2024-06-21 18:41:13,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801437784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:41:13,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:41:13,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:41:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562216342] [2024-06-21 18:41:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:41:13,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:41:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:41:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:41:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:41:13,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:41:13,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 826 transitions, 15427 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:13,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:41:13,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:41:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:41:17,332 INFO L124 PetriNetUnfolderBase]: 6643/10691 cut-off events. [2024-06-21 18:41:17,332 INFO L125 PetriNetUnfolderBase]: For 1211504/1211510 co-relation queries the response was YES. [2024-06-21 18:41:17,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105365 conditions, 10691 events. 6643/10691 cut-off events. For 1211504/1211510 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 73243 event pairs, 1880 based on Foata normal form. 10/10699 useless extension candidates. Maximal degree in co-relation 105194. Up to 9177 conditions per place. [2024-06-21 18:41:17,513 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 625 selfloop transitions, 350 changer transitions 0/980 dead transitions. [2024-06-21 18:41:17,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 980 transitions, 19409 flow [2024-06-21 18:41:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:41:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:41:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 18:41:17,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 18:41:17,515 INFO L175 Difference]: Start difference. First operand has 432 places, 826 transitions, 15427 flow. Second operand 11 states and 219 transitions. [2024-06-21 18:41:17,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 980 transitions, 19409 flow [2024-06-21 18:41:22,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 980 transitions, 19093 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 18:41:22,125 INFO L231 Difference]: Finished difference. Result has 435 places, 931 transitions, 17704 flow [2024-06-21 18:41:22,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15111, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17704, PETRI_PLACES=435, PETRI_TRANSITIONS=931} [2024-06-21 18:41:22,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-21 18:41:22,126 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 931 transitions, 17704 flow [2024-06-21 18:41:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:22,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:41:22,126 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 18:41:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:41:22,126 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:41:22,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:41:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 617666902, now seen corresponding path program 22 times [2024-06-21 18:41:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:41:22,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442626555] [2024-06-21 18:41:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:41:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:41:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:41:23,593 INFO 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 18:41:23,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:41:23,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442626555] [2024-06-21 18:41:23,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442626555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:41:23,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:41:23,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:41:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595662481] [2024-06-21 18:41:23,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:41:23,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:41:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:41:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:41:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:41:23,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:41:23,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 931 transitions, 17704 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:23,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:41:23,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:41:23,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:41:27,306 INFO L124 PetriNetUnfolderBase]: 6717/10797 cut-off events. [2024-06-21 18:41:27,307 INFO L125 PetriNetUnfolderBase]: For 1232741/1232747 co-relation queries the response was YES. [2024-06-21 18:41:27,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107383 conditions, 10797 events. 6717/10797 cut-off events. For 1232741/1232747 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 73862 event pairs, 1885 based on Foata normal form. 10/10805 useless extension candidates. Maximal degree in co-relation 107209. Up to 9277 conditions per place. [2024-06-21 18:41:27,486 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 637 selfloop transitions, 356 changer transitions 0/998 dead transitions. [2024-06-21 18:41:27,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 998 transitions, 20402 flow [2024-06-21 18:41:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:41:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:41:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 18:41:27,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 18:41:27,487 INFO L175 Difference]: Start difference. First operand has 435 places, 931 transitions, 17704 flow. Second operand 11 states and 218 transitions. [2024-06-21 18:41:27,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 998 transitions, 20402 flow [2024-06-21 18:41:31,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 998 transitions, 19889 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 18:41:31,654 INFO L231 Difference]: Finished difference. Result has 442 places, 954 transitions, 18413 flow [2024-06-21 18:41:31,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17231, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18413, PETRI_PLACES=442, PETRI_TRANSITIONS=954} [2024-06-21 18:41:31,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-21 18:41:31,656 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 954 transitions, 18413 flow [2024-06-21 18:41:31,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:31,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:41:31,656 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 18:41:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:41:31,656 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:41:31,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:41:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1074702504, now seen corresponding path program 23 times [2024-06-21 18:41:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:41:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708750821] [2024-06-21 18:41:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:41:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:41:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:41:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:41:33,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:41:33,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708750821] [2024-06-21 18:41:33,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708750821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:41:33,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:41:33,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:41:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024730047] [2024-06-21 18:41:33,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:41:33,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:41:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:41:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:41:33,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:41:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:41:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 954 transitions, 18413 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:41:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:41:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:41:37,329 INFO L124 PetriNetUnfolderBase]: 6781/10908 cut-off events. [2024-06-21 18:41:37,330 INFO L125 PetriNetUnfolderBase]: For 1273715/1273721 co-relation queries the response was YES. [2024-06-21 18:41:37,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108786 conditions, 10908 events. 6781/10908 cut-off events. For 1273715/1273721 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 74790 event pairs, 1882 based on Foata normal form. 10/10916 useless extension candidates. Maximal degree in co-relation 108611. Up to 9197 conditions per place. [2024-06-21 18:41:37,531 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 627 selfloop transitions, 377 changer transitions 0/1009 dead transitions. [2024-06-21 18:41:37,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1009 transitions, 21238 flow [2024-06-21 18:41:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:41:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:41:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 18:41:37,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-21 18:41:37,533 INFO L175 Difference]: Start difference. First operand has 442 places, 954 transitions, 18413 flow. Second operand 11 states and 221 transitions. [2024-06-21 18:41:37,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1009 transitions, 21238 flow [2024-06-21 18:41:42,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1009 transitions, 20619 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 18:41:42,029 INFO L231 Difference]: Finished difference. Result has 448 places, 962 transitions, 18843 flow [2024-06-21 18:41:42,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17798, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18843, PETRI_PLACES=448, PETRI_TRANSITIONS=962} [2024-06-21 18:41:42,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-21 18:41:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 962 transitions, 18843 flow [2024-06-21 18:41:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:42,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:41:42,030 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 18:41:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:41:42,031 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:41:42,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:41:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1961050276, now seen corresponding path program 24 times [2024-06-21 18:41:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:41:42,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710455151] [2024-06-21 18:41:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:41:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:41:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:41:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:41:43,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:41:43,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710455151] [2024-06-21 18:41:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710455151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:41:43,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:41:43,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:41:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914868302] [2024-06-21 18:41:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:41:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:41:43,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:41:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:41:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:41:43,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:41:43,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 962 transitions, 18843 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:43,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:41:43,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:41:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:41:47,518 INFO L124 PetriNetUnfolderBase]: 6773/10886 cut-off events. [2024-06-21 18:41:47,518 INFO L125 PetriNetUnfolderBase]: For 1283989/1283995 co-relation queries the response was YES. [2024-06-21 18:41:47,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108722 conditions, 10886 events. 6773/10886 cut-off events. For 1283989/1283995 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 74535 event pairs, 1892 based on Foata normal form. 10/10894 useless extension candidates. Maximal degree in co-relation 108545. Up to 9365 conditions per place. [2024-06-21 18:41:47,700 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 649 selfloop transitions, 353 changer transitions 0/1007 dead transitions. [2024-06-21 18:41:47,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1007 transitions, 21126 flow [2024-06-21 18:41:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:41:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:41:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 18:41:47,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 18:41:47,702 INFO L175 Difference]: Start difference. First operand has 448 places, 962 transitions, 18843 flow. Second operand 11 states and 219 transitions. [2024-06-21 18:41:47,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1007 transitions, 21126 flow [2024-06-21 18:41:51,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1007 transitions, 20563 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-21 18:41:51,971 INFO L231 Difference]: Finished difference. Result has 453 places, 963 transitions, 19032 flow [2024-06-21 18:41:51,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18282, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19032, PETRI_PLACES=453, PETRI_TRANSITIONS=963} [2024-06-21 18:41:51,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-21 18:41:51,973 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 963 transitions, 19032 flow [2024-06-21 18:41:51,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:51,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:41:51,973 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 18:41:51,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:41:51,973 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 18:41:51,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:41:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1159696010, now seen corresponding path program 5 times [2024-06-21 18:41:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:41:51,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16659993] [2024-06-21 18:41:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:41:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:41:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:41:52,921 INFO 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 18:41:52,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:41:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16659993] [2024-06-21 18:41:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16659993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:41:52,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:41:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:41:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124702587] [2024-06-21 18:41:52,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:41:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:41:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:41:52,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:41:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:41:53,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:41:53,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 963 transitions, 19032 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:41:53,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:41:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:41:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand