./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.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/mix028_tso.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/mix028_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix028_tso.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 18:48:15,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:48:15,641 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:48:15,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:48:15,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:48:15,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:48:15,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:48:15,668 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:48:15,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:48:15,668 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:48:15,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:48:15,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:48:15,669 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:48:15,670 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:48:15,670 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:48:15,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:48:15,671 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:48:15,671 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:48:15,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:48:15,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:48:15,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:48:15,672 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:48:15,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:48:15,672 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:48:15,673 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:48:15,673 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:48:15,673 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:48:15,673 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:48:15,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:48:15,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:48:15,674 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:48:15,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:48:15,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:48:15,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:48:15,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:48:15,675 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:48:15,675 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:48:15,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:48:15,675 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:48:15,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:48:15,676 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:48:15,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:48:15,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:48:15,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:48:15,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:48:15,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:48:15,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:48:15,867 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:48:15,868 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:48:15,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix028_tso.yml/witness.yml [2024-06-21 18:48:15,969 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:48:15,969 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:48:15,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-21 18:48:16,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:48:17,200 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:48:17,200 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-21 18:48:17,223 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270fcdfc8/94978fcabc294c8686e01f1e50333156/FLAG96eb15012 [2024-06-21 18:48:17,252 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270fcdfc8/94978fcabc294c8686e01f1e50333156 [2024-06-21 18:48:17,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:48:17,254 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:48:17,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:48:17,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:48:17,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:48:17,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:15" (1/2) ... [2024-06-21 18:48:17,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f82a28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:48:17, skipping insertion in model container [2024-06-21 18:48:17,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:15" (1/2) ... [2024-06-21 18:48:17,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1620e6fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:48:17, skipping insertion in model container [2024-06-21 18:48:17,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:48:17" (2/2) ... [2024-06-21 18:48:17,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f82a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17, skipping insertion in model container [2024-06-21 18:48:17,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:48:17" (2/2) ... [2024-06-21 18:48:17,266 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:48:17,285 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:48:17,286 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ! multithreaded || (((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$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_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:17,286 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ! multithreaded || (((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$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_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:17,286 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ! multithreaded || (((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$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_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:17,286 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:48:17,286 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-21 18:48:17,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:48:17,527 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:48:17,564 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:48:17,673 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:48:17,706 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:48:17,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17 WrapperNode [2024-06-21 18:48:17,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:48:17,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:48:17,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:48:17,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:48:17,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,801 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-21 18:48:17,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:48:17,803 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:48:17,803 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:48:17,803 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:48:17,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,830 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 18:48:17,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,837 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,840 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,842 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:48:17,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:48:17,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:48:17,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:48:17,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (1/1) ... [2024-06-21 18:48:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:48:17,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:48:17,910 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 18:48:17,961 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 18:48:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:48:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:48:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:48:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:48:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:48:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:48:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:48:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:48:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:48:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:48:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:48:17,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:48:17,980 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 18:48:18,117 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:48:18,119 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:48:18,517 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:48:18,518 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:48:18,648 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:48:18,649 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:48:18,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:48:18 BoogieIcfgContainer [2024-06-21 18:48:18,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:48:18,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:48:18,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:48:18,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:48:18,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:15" (1/4) ... [2024-06-21 18:48:18,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2b32ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:48:18, skipping insertion in model container [2024-06-21 18:48:18,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:48:17" (2/4) ... [2024-06-21 18:48:18,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2b32ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:48:18, skipping insertion in model container [2024-06-21 18:48:18,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:17" (3/4) ... [2024-06-21 18:48:18,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2b32ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:48:18, skipping insertion in model container [2024-06-21 18:48:18,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:48:18" (4/4) ... [2024-06-21 18:48:18,659 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_tso.i [2024-06-21 18:48:18,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:48:18,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:48:18,671 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:48:18,737 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:48:18,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:48:18,794 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 18:48:18,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:48:18,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:48:18,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:48:18,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 18:48:18,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:48:18,821 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;@26fb3d72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:48:18,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:48:18,825 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:48:18,825 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:48:18,825 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:48:18,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:18,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:48:18,826 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 18:48:18,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash 399969166, now seen corresponding path program 1 times [2024-06-21 18:48:18,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:18,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551117789] [2024-06-21 18:48:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:19,916 INFO 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 18:48:19,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:19,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551117789] [2024-06-21 18:48:19,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551117789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:19,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:19,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:48:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455585274] [2024-06-21 18:48:19,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:19,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:48:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:48:19,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:48:19,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:48:20,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:20,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:20,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:48:20,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:20,370 INFO L124 PetriNetUnfolderBase]: 1359/2109 cut-off events. [2024-06-21 18:48:20,371 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 18:48:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 2109 events. 1359/2109 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10198 event pairs, 941 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 4211. Up to 2029 conditions per place. [2024-06-21 18:48:20,386 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 18:48:20,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-21 18:48:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:48:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:48:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 18:48:20,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 18:48:20,397 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-21 18:48:20,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-21 18:48:20,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:20,402 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 18:48:20,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 18:48:20,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 18:48:20,407 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 18:48:20,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:20,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:20,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:20,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:48:20,407 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 18:48:20,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2118308141, now seen corresponding path program 1 times [2024-06-21 18:48:20,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553494443] [2024-06-21 18:48:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:20,997 INFO 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 18:48:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553494443] [2024-06-21 18:48:20,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553494443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:20,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:20,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:48:20,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115054806] [2024-06-21 18:48:20,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:21,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:48:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:48:21,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:48:21,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:48:21,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:21,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:21,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:48:21,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:21,307 INFO L124 PetriNetUnfolderBase]: 1560/2337 cut-off events. [2024-06-21 18:48:21,307 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-06-21 18:48:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 2337 events. 1560/2337 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10932 event pairs, 930 based on Foata normal form. 3/2339 useless extension candidates. Maximal degree in co-relation 5341. Up to 2302 conditions per place. [2024-06-21 18:48:21,319 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 18:48:21,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-21 18:48:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:48:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:48:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-21 18:48:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 18:48:21,323 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-21 18:48:21,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-21 18:48:21,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:48:21,326 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 18:48:21,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 18:48:21,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 18:48:21,327 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 18:48:21,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:21,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:21,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:21,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:48:21,330 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 18:48:21,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1243043897, now seen corresponding path program 1 times [2024-06-21 18:48:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829263032] [2024-06-21 18:48:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:22,041 INFO 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 18:48:22,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:22,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829263032] [2024-06-21 18:48:22,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829263032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:22,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:22,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866712497] [2024-06-21 18:48:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:22,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:48:22,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:22,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:22,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:48:22,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:22,358 INFO L124 PetriNetUnfolderBase]: 1568/2357 cut-off events. [2024-06-21 18:48:22,358 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2024-06-21 18:48:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 2357 events. 1568/2357 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11219 event pairs, 669 based on Foata normal form. 5/2361 useless extension candidates. Maximal degree in co-relation 5976. Up to 2248 conditions per place. [2024-06-21 18:48:22,369 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-21 18:48:22,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-21 18:48:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 18:48:22,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-21 18:48:22,371 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 118 transitions. [2024-06-21 18:48:22,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-21 18:48:22,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:22,373 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-21 18:48:22,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 18:48:22,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 18:48:22,374 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-21 18:48:22,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:22,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:22,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:22,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:48:22,375 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 18:48:22,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:22,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1154035042, now seen corresponding path program 1 times [2024-06-21 18:48:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:22,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934997169] [2024-06-21 18:48:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:22,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934997169] [2024-06-21 18:48:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934997169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:23,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:23,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784303488] [2024-06-21 18:48:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:23,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:48:23,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:23,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:23,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:48:23,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:23,512 INFO L124 PetriNetUnfolderBase]: 1580/2377 cut-off events. [2024-06-21 18:48:23,512 INFO L125 PetriNetUnfolderBase]: For 3185/3187 co-relation queries the response was YES. [2024-06-21 18:48:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 2377 events. 1580/2377 cut-off events. For 3185/3187 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11367 event pairs, 481 based on Foata normal form. 12/2388 useless extension candidates. Maximal degree in co-relation 7117. Up to 2216 conditions per place. [2024-06-21 18:48:23,523 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-21 18:48:23,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 497 flow [2024-06-21 18:48:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 18:48:23,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 18:48:23,525 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 135 transitions. [2024-06-21 18:48:23,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 497 flow [2024-06-21 18:48:23,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 489 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 18:48:23,529 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-21 18:48:23,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-21 18:48:23,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-21 18:48:23,530 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-21 18:48:23,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:23,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:23,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:48:23,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:23,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 123911033, now seen corresponding path program 1 times [2024-06-21 18:48:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:23,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225367222] [2024-06-21 18:48:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:24,175 INFO 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 18:48:24,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:24,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225367222] [2024-06-21 18:48:24,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225367222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:24,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:24,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537497306] [2024-06-21 18:48:24,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:24,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:24,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:24,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:24,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:24,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:24,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:24,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:24,628 INFO L124 PetriNetUnfolderBase]: 1368/2118 cut-off events. [2024-06-21 18:48:24,629 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-21 18:48:24,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 2118 events. 1368/2118 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10397 event pairs, 562 based on Foata normal form. 2/2099 useless extension candidates. Maximal degree in co-relation 6868. Up to 2036 conditions per place. [2024-06-21 18:48:24,641 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-21 18:48:24,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 447 flow [2024-06-21 18:48:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 18:48:24,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 18:48:24,643 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 5 states and 91 transitions. [2024-06-21 18:48:24,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 447 flow [2024-06-21 18:48:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 395 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:24,646 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 288 flow [2024-06-21 18:48:24,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 18:48:24,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-21 18:48:24,647 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 288 flow [2024-06-21 18:48:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:24,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:24,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:24,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:48:24,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:24,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -454848311, now seen corresponding path program 1 times [2024-06-21 18:48:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:24,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753674358] [2024-06-21 18:48:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753674358] [2024-06-21 18:48:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753674358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:25,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:25,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940100822] [2024-06-21 18:48:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:25,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:25,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 288 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:25,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:25,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:25,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:25,992 INFO L124 PetriNetUnfolderBase]: 1358/2140 cut-off events. [2024-06-21 18:48:25,993 INFO L125 PetriNetUnfolderBase]: For 4714/4714 co-relation queries the response was YES. [2024-06-21 18:48:25,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 2140 events. 1358/2140 cut-off events. For 4714/4714 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10556 event pairs, 526 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 6892. Up to 2004 conditions per place. [2024-06-21 18:48:26,006 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-21 18:48:26,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 476 flow [2024-06-21 18:48:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 18:48:26,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:48:26,008 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 288 flow. Second operand 6 states and 108 transitions. [2024-06-21 18:48:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 476 flow [2024-06-21 18:48:26,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:26,012 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 329 flow [2024-06-21 18:48:26,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-21 18:48:26,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-21 18:48:26,013 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 329 flow [2024-06-21 18:48:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:26,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:26,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:26,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:48:26,014 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 18:48:26,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:26,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1215609716, now seen corresponding path program 1 times [2024-06-21 18:48:26,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:26,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882809102] [2024-06-21 18:48:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:26,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:26,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882809102] [2024-06-21 18:48:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882809102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:26,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842693232] [2024-06-21 18:48:26,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:26,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:26,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:26,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:26,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:27,367 INFO L124 PetriNetUnfolderBase]: 1641/2481 cut-off events. [2024-06-21 18:48:27,368 INFO L125 PetriNetUnfolderBase]: For 7484/7488 co-relation queries the response was YES. [2024-06-21 18:48:27,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8805 conditions, 2481 events. 1641/2481 cut-off events. For 7484/7488 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11682 event pairs, 694 based on Foata normal form. 8/2488 useless extension candidates. Maximal degree in co-relation 8778. Up to 2307 conditions per place. [2024-06-21 18:48:27,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 59 selfloop transitions, 29 changer transitions 0/92 dead transitions. [2024-06-21 18:48:27,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 711 flow [2024-06-21 18:48:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 18:48:27,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-21 18:48:27,384 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 329 flow. Second operand 6 states and 115 transitions. [2024-06-21 18:48:27,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 711 flow [2024-06-21 18:48:27,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 681 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:27,390 INFO L231 Difference]: Finished difference. Result has 64 places, 70 transitions, 478 flow [2024-06-21 18:48:27,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2024-06-21 18:48:27,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-21 18:48:27,391 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 478 flow [2024-06-21 18:48:27,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:27,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:27,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:27,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:48:27,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:27,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1180546856, now seen corresponding path program 2 times [2024-06-21 18:48:27,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:27,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905683670] [2024-06-21 18:48:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:28,160 INFO 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 18:48:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905683670] [2024-06-21 18:48:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905683670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:28,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:28,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:28,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242323638] [2024-06-21 18:48:28,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:28,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:28,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:28,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:28,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 478 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:28,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:28,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:28,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:28,689 INFO L124 PetriNetUnfolderBase]: 1633/2459 cut-off events. [2024-06-21 18:48:28,690 INFO L125 PetriNetUnfolderBase]: For 9065/9067 co-relation queries the response was YES. [2024-06-21 18:48:28,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9138 conditions, 2459 events. 1633/2459 cut-off events. For 9065/9067 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11467 event pairs, 696 based on Foata normal form. 4/2461 useless extension candidates. Maximal degree in co-relation 9107. Up to 2299 conditions per place. [2024-06-21 18:48:28,709 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 51 selfloop transitions, 33 changer transitions 0/88 dead transitions. [2024-06-21 18:48:28,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 732 flow [2024-06-21 18:48:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 18:48:28,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:48:28,712 INFO L175 Difference]: Start difference. First operand has 64 places, 70 transitions, 478 flow. Second operand 6 states and 111 transitions. [2024-06-21 18:48:28,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 732 flow [2024-06-21 18:48:28,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 703 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 18:48:28,720 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 535 flow [2024-06-21 18:48:28,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=535, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 18:48:28,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 18:48:28,722 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 535 flow [2024-06-21 18:48:28,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:28,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:28,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:28,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:48:28,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:28,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1995546730, now seen corresponding path program 3 times [2024-06-21 18:48:28,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477661868] [2024-06-21 18:48:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:28,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:29,307 INFO 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 18:48:29,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:29,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477661868] [2024-06-21 18:48:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477661868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:29,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022104891] [2024-06-21 18:48:29,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:29,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:29,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:29,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:29,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 535 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:29,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:29,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:29,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:29,907 INFO L124 PetriNetUnfolderBase]: 1672/2519 cut-off events. [2024-06-21 18:48:29,907 INFO L125 PetriNetUnfolderBase]: For 11360/11366 co-relation queries the response was YES. [2024-06-21 18:48:29,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9742 conditions, 2519 events. 1672/2519 cut-off events. For 11360/11366 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11852 event pairs, 684 based on Foata normal form. 10/2528 useless extension candidates. Maximal degree in co-relation 9707. Up to 2324 conditions per place. [2024-06-21 18:48:29,920 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 61 selfloop transitions, 45 changer transitions 0/110 dead transitions. [2024-06-21 18:48:29,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 990 flow [2024-06-21 18:48:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 18:48:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:48:29,922 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 535 flow. Second operand 7 states and 126 transitions. [2024-06-21 18:48:29,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 990 flow [2024-06-21 18:48:29,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 933 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:29,946 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 786 flow [2024-06-21 18:48:29,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-21 18:48:29,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 18:48:29,947 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 786 flow [2024-06-21 18:48:29,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:29,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:29,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:48:29,948 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 18:48:29,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1772357698, now seen corresponding path program 1 times [2024-06-21 18:48:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:29,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674917730] [2024-06-21 18:48:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:30,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:30,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674917730] [2024-06-21 18:48:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674917730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:30,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:30,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250111686] [2024-06-21 18:48:30,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:30,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:30,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:30,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 786 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:30,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:30,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:30,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:31,539 INFO L124 PetriNetUnfolderBase]: 1780/2681 cut-off events. [2024-06-21 18:48:31,540 INFO L125 PetriNetUnfolderBase]: For 14850/14852 co-relation queries the response was YES. [2024-06-21 18:48:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10804 conditions, 2681 events. 1780/2681 cut-off events. For 14850/14852 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12685 event pairs, 485 based on Foata normal form. 10/2689 useless extension candidates. Maximal degree in co-relation 10765. Up to 2259 conditions per place. [2024-06-21 18:48:31,552 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 73 selfloop transitions, 50 changer transitions 0/127 dead transitions. [2024-06-21 18:48:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 1272 flow [2024-06-21 18:48:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 18:48:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 18:48:31,554 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 786 flow. Second operand 7 states and 136 transitions. [2024-06-21 18:48:31,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 1272 flow [2024-06-21 18:48:31,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 1225 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:31,573 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 926 flow [2024-06-21 18:48:31,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=926, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2024-06-21 18:48:31,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-21 18:48:31,575 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 926 flow [2024-06-21 18:48:31,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:31,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:31,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:31,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:48:31,576 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 18:48:31,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:31,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2057991610, now seen corresponding path program 2 times [2024-06-21 18:48:31,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:31,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801867653] [2024-06-21 18:48:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:31,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:32,517 INFO 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 18:48:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801867653] [2024-06-21 18:48:32,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801867653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:32,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:32,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:32,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064861113] [2024-06-21 18:48:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:32,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:32,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:32,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:32,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:32,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:32,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:33,313 INFO L124 PetriNetUnfolderBase]: 1834/2762 cut-off events. [2024-06-21 18:48:33,313 INFO L125 PetriNetUnfolderBase]: For 18738/18740 co-relation queries the response was YES. [2024-06-21 18:48:33,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11985 conditions, 2762 events. 1834/2762 cut-off events. For 18738/18740 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13162 event pairs, 476 based on Foata normal form. 6/2762 useless extension candidates. Maximal degree in co-relation 11945. Up to 2295 conditions per place. [2024-06-21 18:48:33,326 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 63 selfloop transitions, 66 changer transitions 0/133 dead transitions. [2024-06-21 18:48:33,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 133 transitions, 1428 flow [2024-06-21 18:48:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 18:48:33,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 18:48:33,328 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 926 flow. Second operand 7 states and 134 transitions. [2024-06-21 18:48:33,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 133 transitions, 1428 flow [2024-06-21 18:48:33,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 133 transitions, 1374 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:33,345 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 1098 flow [2024-06-21 18:48:33,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1098, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2024-06-21 18:48:33,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-21 18:48:33,346 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 1098 flow [2024-06-21 18:48:33,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:33,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:33,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:48:33,347 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:33,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1595226178, now seen corresponding path program 3 times [2024-06-21 18:48:33,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:33,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678810879] [2024-06-21 18:48:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:34,263 INFO 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 18:48:34,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:34,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678810879] [2024-06-21 18:48:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678810879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:34,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165891543] [2024-06-21 18:48:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:34,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:34,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:34,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:34,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:34,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 1098 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:34,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:34,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:34,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:34,968 INFO L124 PetriNetUnfolderBase]: 1824/2748 cut-off events. [2024-06-21 18:48:34,968 INFO L125 PetriNetUnfolderBase]: For 22357/22359 co-relation queries the response was YES. [2024-06-21 18:48:34,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12572 conditions, 2748 events. 1824/2748 cut-off events. For 22357/22359 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13051 event pairs, 474 based on Foata normal form. 6/2748 useless extension candidates. Maximal degree in co-relation 12529. Up to 2291 conditions per place. [2024-06-21 18:48:34,984 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 69 selfloop transitions, 63 changer transitions 0/136 dead transitions. [2024-06-21 18:48:34,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 1550 flow [2024-06-21 18:48:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 18:48:34,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 18:48:34,986 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 1098 flow. Second operand 7 states and 135 transitions. [2024-06-21 18:48:34,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 1550 flow [2024-06-21 18:48:35,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1487 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:35,008 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 1183 flow [2024-06-21 18:48:35,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1183, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-06-21 18:48:35,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-21 18:48:35,010 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 1183 flow [2024-06-21 18:48:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:35,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:35,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:35,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:48:35,010 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 18:48:35,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:35,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1698446078, now seen corresponding path program 4 times [2024-06-21 18:48:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:35,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375088960] [2024-06-21 18:48:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:35,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375088960] [2024-06-21 18:48:35,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375088960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:35,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:35,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:35,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385212396] [2024-06-21 18:48:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:35,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:35,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 1183 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:36,558 INFO L124 PetriNetUnfolderBase]: 1908/2866 cut-off events. [2024-06-21 18:48:36,559 INFO L125 PetriNetUnfolderBase]: For 26082/26084 co-relation queries the response was YES. [2024-06-21 18:48:36,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13439 conditions, 2866 events. 1908/2866 cut-off events. For 26082/26084 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13633 event pairs, 477 based on Foata normal form. 10/2874 useless extension candidates. Maximal degree in co-relation 13393. Up to 2351 conditions per place. [2024-06-21 18:48:36,575 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 84 selfloop transitions, 72 changer transitions 0/160 dead transitions. [2024-06-21 18:48:36,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 160 transitions, 1917 flow [2024-06-21 18:48:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:48:36,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-21 18:48:36,577 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 1183 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:48:36,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 160 transitions, 1917 flow [2024-06-21 18:48:36,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 160 transitions, 1763 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:36,608 INFO L231 Difference]: Finished difference. Result has 94 places, 122 transitions, 1397 flow [2024-06-21 18:48:36,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1397, PETRI_PLACES=94, PETRI_TRANSITIONS=122} [2024-06-21 18:48:36,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 18:48:36,609 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 122 transitions, 1397 flow [2024-06-21 18:48:36,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:36,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:36,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:36,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:48:36,610 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 18:48:36,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2058000538, now seen corresponding path program 1 times [2024-06-21 18:48:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:36,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561884953] [2024-06-21 18:48:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:38,216 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 18:48:38,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561884953] [2024-06-21 18:48:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561884953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:38,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:38,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:48:38,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023992173] [2024-06-21 18:48:38,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:38,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:48:38,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:48:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:48:38,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:38,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 122 transitions, 1397 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:38,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:38,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:38,905 INFO L124 PetriNetUnfolderBase]: 1693/2640 cut-off events. [2024-06-21 18:48:38,905 INFO L125 PetriNetUnfolderBase]: For 25559/25561 co-relation queries the response was YES. [2024-06-21 18:48:38,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12481 conditions, 2640 events. 1693/2640 cut-off events. For 25559/25561 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13028 event pairs, 506 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 12432. Up to 2467 conditions per place. [2024-06-21 18:48:38,921 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 15 changer transitions 0/144 dead transitions. [2024-06-21 18:48:38,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 144 transitions, 1763 flow [2024-06-21 18:48:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 18:48:38,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 18:48:38,922 INFO L175 Difference]: Start difference. First operand has 94 places, 122 transitions, 1397 flow. Second operand 8 states and 133 transitions. [2024-06-21 18:48:38,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 144 transitions, 1763 flow [2024-06-21 18:48:38,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1677 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:38,948 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1382 flow [2024-06-21 18:48:38,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-21 18:48:38,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 18:48:38,949 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1382 flow [2024-06-21 18:48:38,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:38,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:38,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:48:38,950 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:38,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1914180474, now seen corresponding path program 1 times [2024-06-21 18:48:38,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:38,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287117845] [2024-06-21 18:48:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:39,606 INFO 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 18:48:39,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:39,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287117845] [2024-06-21 18:48:39,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287117845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:39,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:39,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181525053] [2024-06-21 18:48:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:39,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:39,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:39,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:39,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1382 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:39,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:39,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:39,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:40,032 INFO L124 PetriNetUnfolderBase]: 1897/2859 cut-off events. [2024-06-21 18:48:40,032 INFO L125 PetriNetUnfolderBase]: For 31608/31610 co-relation queries the response was YES. [2024-06-21 18:48:40,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13690 conditions, 2859 events. 1897/2859 cut-off events. For 31608/31610 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13650 event pairs, 627 based on Foata normal form. 1/2859 useless extension candidates. Maximal degree in co-relation 13639. Up to 2802 conditions per place. [2024-06-21 18:48:40,049 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 10 changer transitions 0/134 dead transitions. [2024-06-21 18:48:40,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1684 flow [2024-06-21 18:48:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 18:48:40,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 18:48:40,050 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1382 flow. Second operand 5 states and 83 transitions. [2024-06-21 18:48:40,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1684 flow [2024-06-21 18:48:40,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1628 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 18:48:40,078 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1380 flow [2024-06-21 18:48:40,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1380, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2024-06-21 18:48:40,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-21 18:48:40,080 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1380 flow [2024-06-21 18:48:40,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:40,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:40,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:40,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:48:40,081 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:40,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash 891481776, now seen corresponding path program 1 times [2024-06-21 18:48:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:40,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199627311] [2024-06-21 18:48:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:41,029 INFO 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 18:48:41,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:41,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199627311] [2024-06-21 18:48:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199627311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:41,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875674958] [2024-06-21 18:48:41,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:41,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:41,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:41,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:41,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:41,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:41,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:41,814 INFO L124 PetriNetUnfolderBase]: 1933/2934 cut-off events. [2024-06-21 18:48:41,814 INFO L125 PetriNetUnfolderBase]: For 35279/35283 co-relation queries the response was YES. [2024-06-21 18:48:41,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14373 conditions, 2934 events. 1933/2934 cut-off events. For 35279/35283 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14194 event pairs, 510 based on Foata normal form. 10/2942 useless extension candidates. Maximal degree in co-relation 14323. Up to 2367 conditions per place. [2024-06-21 18:48:41,831 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 78 changer transitions 0/163 dead transitions. [2024-06-21 18:48:41,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 163 transitions, 1990 flow [2024-06-21 18:48:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 18:48:41,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-21 18:48:41,833 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1380 flow. Second operand 7 states and 138 transitions. [2024-06-21 18:48:41,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 163 transitions, 1990 flow [2024-06-21 18:48:41,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 163 transitions, 1958 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:41,865 INFO L231 Difference]: Finished difference. Result has 102 places, 134 transitions, 1640 flow [2024-06-21 18:48:41,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1640, PETRI_PLACES=102, PETRI_TRANSITIONS=134} [2024-06-21 18:48:41,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 18:48:41,866 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 134 transitions, 1640 flow [2024-06-21 18:48:41,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:41,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:41,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:41,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:48:41,867 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 18:48:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash 891487356, now seen corresponding path program 2 times [2024-06-21 18:48:41,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:41,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462281803] [2024-06-21 18:48:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462281803] [2024-06-21 18:48:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462281803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:42,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:42,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486883291] [2024-06-21 18:48:42,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:42,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:42,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 134 transitions, 1640 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:42,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:42,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:42,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:43,525 INFO L124 PetriNetUnfolderBase]: 1969/2994 cut-off events. [2024-06-21 18:48:43,526 INFO L125 PetriNetUnfolderBase]: For 41290/41292 co-relation queries the response was YES. [2024-06-21 18:48:43,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15566 conditions, 2994 events. 1969/2994 cut-off events. For 41290/41292 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14619 event pairs, 502 based on Foata normal form. 8/3000 useless extension candidates. Maximal degree in co-relation 15513. Up to 2399 conditions per place. [2024-06-21 18:48:43,547 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 82 changer transitions 0/167 dead transitions. [2024-06-21 18:48:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 2260 flow [2024-06-21 18:48:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 18:48:43,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 18:48:43,549 INFO L175 Difference]: Start difference. First operand has 102 places, 134 transitions, 1640 flow. Second operand 7 states and 136 transitions. [2024-06-21 18:48:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 2260 flow [2024-06-21 18:48:43,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 167 transitions, 2146 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:43,586 INFO L231 Difference]: Finished difference. Result has 106 places, 140 transitions, 1790 flow [2024-06-21 18:48:43,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=106, PETRI_TRANSITIONS=140} [2024-06-21 18:48:43,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 18:48:43,587 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 140 transitions, 1790 flow [2024-06-21 18:48:43,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:43,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:43,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:43,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:48:43,587 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 18:48:43,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -626768384, now seen corresponding path program 3 times [2024-06-21 18:48:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:43,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455160575] [2024-06-21 18:48:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:43,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:44,526 INFO 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 18:48:44,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455160575] [2024-06-21 18:48:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455160575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:44,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:44,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:44,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275451301] [2024-06-21 18:48:44,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:44,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:44,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:44,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:44,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 140 transitions, 1790 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:44,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:44,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:44,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:45,216 INFO L124 PetriNetUnfolderBase]: 1953/2978 cut-off events. [2024-06-21 18:48:45,217 INFO L125 PetriNetUnfolderBase]: For 45678/45682 co-relation queries the response was YES. [2024-06-21 18:48:45,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15637 conditions, 2978 events. 1953/2978 cut-off events. For 45678/45682 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14556 event pairs, 492 based on Foata normal form. 10/2987 useless extension candidates. Maximal degree in co-relation 15581. Up to 2386 conditions per place. [2024-06-21 18:48:45,312 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 79 selfloop transitions, 81 changer transitions 0/164 dead transitions. [2024-06-21 18:48:45,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 164 transitions, 2255 flow [2024-06-21 18:48:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 18:48:45,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 18:48:45,314 INFO L175 Difference]: Start difference. First operand has 106 places, 140 transitions, 1790 flow. Second operand 7 states and 129 transitions. [2024-06-21 18:48:45,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 164 transitions, 2255 flow [2024-06-21 18:48:45,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 164 transitions, 2105 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:45,352 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1815 flow [2024-06-21 18:48:45,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1815, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-21 18:48:45,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 18:48:45,352 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1815 flow [2024-06-21 18:48:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:45,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:45,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:48:45,353 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 18:48:45,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2095075874, now seen corresponding path program 4 times [2024-06-21 18:48:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:45,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398911445] [2024-06-21 18:48:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:46,070 INFO 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 18:48:46,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:46,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398911445] [2024-06-21 18:48:46,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398911445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:46,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:46,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:46,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541428914] [2024-06-21 18:48:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:46,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:46,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:46,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:46,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1815 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:46,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:46,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:46,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:46,875 INFO L124 PetriNetUnfolderBase]: 2045/3107 cut-off events. [2024-06-21 18:48:46,876 INFO L125 PetriNetUnfolderBase]: For 51730/51732 co-relation queries the response was YES. [2024-06-21 18:48:46,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 3107 events. 2045/3107 cut-off events. For 51730/51732 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15159 event pairs, 464 based on Foata normal form. 6/3111 useless extension candidates. Maximal degree in co-relation 16486. Up to 2458 conditions per place. [2024-06-21 18:48:46,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 92 selfloop transitions, 98 changer transitions 0/194 dead transitions. [2024-06-21 18:48:46,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 194 transitions, 2662 flow [2024-06-21 18:48:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:48:46,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 18:48:46,896 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1815 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:48:46,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 194 transitions, 2662 flow [2024-06-21 18:48:46,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 194 transitions, 2512 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:46,937 INFO L231 Difference]: Finished difference. Result has 115 places, 156 transitions, 2124 flow [2024-06-21 18:48:46,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2124, PETRI_PLACES=115, PETRI_TRANSITIONS=156} [2024-06-21 18:48:46,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 18:48:46,937 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 156 transitions, 2124 flow [2024-06-21 18:48:46,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:46,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:46,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:48:46,938 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 18:48:46,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:46,939 INFO L85 PathProgramCache]: Analyzing trace with hash 557435572, now seen corresponding path program 5 times [2024-06-21 18:48:46,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:46,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797176477] [2024-06-21 18:48:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:47,654 INFO 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 18:48:47,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:47,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797176477] [2024-06-21 18:48:47,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797176477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:47,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:47,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:47,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600090108] [2024-06-21 18:48:47,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:47,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:47,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:47,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:47,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 156 transitions, 2124 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:47,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:47,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:47,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:48,291 INFO L124 PetriNetUnfolderBase]: 2103/3216 cut-off events. [2024-06-21 18:48:48,291 INFO L125 PetriNetUnfolderBase]: For 58777/58781 co-relation queries the response was YES. [2024-06-21 18:48:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17475 conditions, 3216 events. 2103/3216 cut-off events. For 58777/58781 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15944 event pairs, 498 based on Foata normal form. 8/3222 useless extension candidates. Maximal degree in co-relation 17414. Up to 2507 conditions per place. [2024-06-21 18:48:48,311 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 87 selfloop transitions, 118 changer transitions 0/209 dead transitions. [2024-06-21 18:48:48,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 209 transitions, 2972 flow [2024-06-21 18:48:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:48:48,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 18:48:48,313 INFO L175 Difference]: Start difference. First operand has 115 places, 156 transitions, 2124 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:48:48,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 209 transitions, 2972 flow [2024-06-21 18:48:48,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 209 transitions, 2818 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:48,362 INFO L231 Difference]: Finished difference. Result has 121 places, 179 transitions, 2684 flow [2024-06-21 18:48:48,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2684, PETRI_PLACES=121, PETRI_TRANSITIONS=179} [2024-06-21 18:48:48,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 18:48:48,363 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 179 transitions, 2684 flow [2024-06-21 18:48:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:48,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:48,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:48,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:48:48,364 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:48,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash -801564482, now seen corresponding path program 1 times [2024-06-21 18:48:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112176638] [2024-06-21 18:48:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:49,507 INFO 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 18:48:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112176638] [2024-06-21 18:48:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112176638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:49,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505843417] [2024-06-21 18:48:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:49,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:49,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:49,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:49,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 179 transitions, 2684 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:49,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:49,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:49,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:50,029 INFO L124 PetriNetUnfolderBase]: 1890/2983 cut-off events. [2024-06-21 18:48:50,029 INFO L125 PetriNetUnfolderBase]: For 58263/58265 co-relation queries the response was YES. [2024-06-21 18:48:50,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16704 conditions, 2983 events. 1890/2983 cut-off events. For 58263/58265 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15279 event pairs, 594 based on Foata normal form. 2/2984 useless extension candidates. Maximal degree in co-relation 16640. Up to 2789 conditions per place. [2024-06-21 18:48:50,048 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2024-06-21 18:48:50,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 191 transitions, 3106 flow [2024-06-21 18:48:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 18:48:50,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-21 18:48:50,049 INFO L175 Difference]: Start difference. First operand has 121 places, 179 transitions, 2684 flow. Second operand 7 states and 110 transitions. [2024-06-21 18:48:50,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 191 transitions, 3106 flow [2024-06-21 18:48:50,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 2972 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:50,092 INFO L231 Difference]: Finished difference. Result has 124 places, 182 transitions, 2614 flow [2024-06-21 18:48:50,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2614, PETRI_PLACES=124, PETRI_TRANSITIONS=182} [2024-06-21 18:48:50,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 18:48:50,092 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 182 transitions, 2614 flow [2024-06-21 18:48:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:50,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:50,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:50,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:48:50,093 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:50,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1952431881, now seen corresponding path program 1 times [2024-06-21 18:48:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:50,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565326355] [2024-06-21 18:48:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:50,986 INFO 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 18:48:50,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:50,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565326355] [2024-06-21 18:48:50,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565326355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:50,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:50,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224677374] [2024-06-21 18:48:50,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:50,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:51,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:51,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 182 transitions, 2614 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:51,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:51,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:51,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:51,722 INFO L124 PetriNetUnfolderBase]: 2111/3235 cut-off events. [2024-06-21 18:48:51,723 INFO L125 PetriNetUnfolderBase]: For 68384/68388 co-relation queries the response was YES. [2024-06-21 18:48:51,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18225 conditions, 3235 events. 2111/3235 cut-off events. For 68384/68388 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16131 event pairs, 622 based on Foata normal form. 8/3242 useless extension candidates. Maximal degree in co-relation 18160. Up to 2920 conditions per place. [2024-06-21 18:48:51,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 53 changer transitions 0/203 dead transitions. [2024-06-21 18:48:51,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 203 transitions, 3098 flow [2024-06-21 18:48:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:48:51,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 18:48:51,747 INFO L175 Difference]: Start difference. First operand has 124 places, 182 transitions, 2614 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:48:51,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 203 transitions, 3098 flow [2024-06-21 18:48:51,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 203 transitions, 3056 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:51,810 INFO L231 Difference]: Finished difference. Result has 127 places, 184 transitions, 2713 flow [2024-06-21 18:48:51,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2713, PETRI_PLACES=127, PETRI_TRANSITIONS=184} [2024-06-21 18:48:51,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 18:48:51,811 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 184 transitions, 2713 flow [2024-06-21 18:48:51,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:51,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:51,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:51,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:48:51,812 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 18:48:51,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -699459325, now seen corresponding path program 2 times [2024-06-21 18:48:51,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:51,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827675839] [2024-06-21 18:48:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:51,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:52,828 INFO 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 18:48:52,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827675839] [2024-06-21 18:48:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827675839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:52,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:52,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:52,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25043650] [2024-06-21 18:48:52,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:52,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:52,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:52,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 184 transitions, 2713 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:52,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:52,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:52,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:53,563 INFO L124 PetriNetUnfolderBase]: 2163/3316 cut-off events. [2024-06-21 18:48:53,563 INFO L125 PetriNetUnfolderBase]: For 74045/74049 co-relation queries the response was YES. [2024-06-21 18:48:53,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18998 conditions, 3316 events. 2163/3316 cut-off events. For 74045/74049 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16649 event pairs, 618 based on Foata normal form. 8/3323 useless extension candidates. Maximal degree in co-relation 18932. Up to 2929 conditions per place. [2024-06-21 18:48:53,586 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 50 changer transitions 0/210 dead transitions. [2024-06-21 18:48:53,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 210 transitions, 3225 flow [2024-06-21 18:48:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:48:53,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 18:48:53,589 INFO L175 Difference]: Start difference. First operand has 127 places, 184 transitions, 2713 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:48:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 210 transitions, 3225 flow [2024-06-21 18:48:53,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 210 transitions, 3106 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:48:53,658 INFO L231 Difference]: Finished difference. Result has 130 places, 189 transitions, 2760 flow [2024-06-21 18:48:53,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2760, PETRI_PLACES=130, PETRI_TRANSITIONS=189} [2024-06-21 18:48:53,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 18:48:53,658 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 189 transitions, 2760 flow [2024-06-21 18:48:53,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:53,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:53,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:48:53,659 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 18:48:53,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash -581126497, now seen corresponding path program 1 times [2024-06-21 18:48:53,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:53,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492807010] [2024-06-21 18:48:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:53,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:55,300 INFO 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 18:48:55,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492807010] [2024-06-21 18:48:55,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492807010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:55,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:55,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:55,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800430827] [2024-06-21 18:48:55,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:55,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:55,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:55,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:55,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 189 transitions, 2760 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:55,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:55,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:55,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:56,340 INFO L124 PetriNetUnfolderBase]: 2266/3481 cut-off events. [2024-06-21 18:48:56,340 INFO L125 PetriNetUnfolderBase]: For 86683/86685 co-relation queries the response was YES. [2024-06-21 18:48:56,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20099 conditions, 3481 events. 2266/3481 cut-off events. For 86683/86685 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17819 event pairs, 494 based on Foata normal form. 26/3505 useless extension candidates. Maximal degree in co-relation 20031. Up to 2585 conditions per place. [2024-06-21 18:48:56,360 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 103 selfloop transitions, 118 changer transitions 0/225 dead transitions. [2024-06-21 18:48:56,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 3354 flow [2024-06-21 18:48:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 18:48:56,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-21 18:48:56,363 INFO L175 Difference]: Start difference. First operand has 130 places, 189 transitions, 2760 flow. Second operand 10 states and 174 transitions. [2024-06-21 18:48:56,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 3354 flow [2024-06-21 18:48:56,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 3244 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:56,425 INFO L231 Difference]: Finished difference. Result has 136 places, 193 transitions, 2972 flow [2024-06-21 18:48:56,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2972, PETRI_PLACES=136, PETRI_TRANSITIONS=193} [2024-06-21 18:48:56,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 18:48:56,426 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 193 transitions, 2972 flow [2024-06-21 18:48:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:56,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:56,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:56,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:48:56,427 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:56,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:56,427 INFO L85 PathProgramCache]: Analyzing trace with hash 988856311, now seen corresponding path program 1 times [2024-06-21 18:48:56,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75146241] [2024-06-21 18:48:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:57,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:57,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75146241] [2024-06-21 18:48:57,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75146241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:57,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:57,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648580086] [2024-06-21 18:48:57,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:57,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:57,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:57,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:57,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 193 transitions, 2972 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:57,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:57,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:57,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:57,671 INFO L124 PetriNetUnfolderBase]: 2271/3492 cut-off events. [2024-06-21 18:48:57,672 INFO L125 PetriNetUnfolderBase]: For 86942/86946 co-relation queries the response was YES. [2024-06-21 18:48:57,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20945 conditions, 3492 events. 2271/3492 cut-off events. For 86942/86946 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17848 event pairs, 635 based on Foata normal form. 5/3496 useless extension candidates. Maximal degree in co-relation 20875. Up to 3351 conditions per place. [2024-06-21 18:48:57,698 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 185 selfloop transitions, 20 changer transitions 0/209 dead transitions. [2024-06-21 18:48:57,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 209 transitions, 3476 flow [2024-06-21 18:48:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 18:48:57,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-21 18:48:57,700 INFO L175 Difference]: Start difference. First operand has 136 places, 193 transitions, 2972 flow. Second operand 6 states and 101 transitions. [2024-06-21 18:48:57,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 209 transitions, 3476 flow [2024-06-21 18:48:57,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 3186 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:48:57,789 INFO L231 Difference]: Finished difference. Result has 135 places, 197 transitions, 2789 flow [2024-06-21 18:48:57,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2789, PETRI_PLACES=135, PETRI_TRANSITIONS=197} [2024-06-21 18:48:57,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 18:48:57,790 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 197 transitions, 2789 flow [2024-06-21 18:48:57,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:57,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:57,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:57,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:48:57,791 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 18:48:57,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1238889527, now seen corresponding path program 2 times [2024-06-21 18:48:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:57,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817665586] [2024-06-21 18:48:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817665586] [2024-06-21 18:48:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817665586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:59,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:59,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:48:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780445255] [2024-06-21 18:48:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:59,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:48:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:48:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:48:59,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:59,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 197 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:59,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:59,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:59,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:00,292 INFO L124 PetriNetUnfolderBase]: 2288/3492 cut-off events. [2024-06-21 18:49:00,292 INFO L125 PetriNetUnfolderBase]: For 89883/89883 co-relation queries the response was YES. [2024-06-21 18:49:00,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20870 conditions, 3492 events. 2288/3492 cut-off events. For 89883/89883 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17656 event pairs, 528 based on Foata normal form. 4/3487 useless extension candidates. Maximal degree in co-relation 20799. Up to 2788 conditions per place. [2024-06-21 18:49:00,312 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 91 selfloop transitions, 132 changer transitions 0/227 dead transitions. [2024-06-21 18:49:00,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 227 transitions, 3373 flow [2024-06-21 18:49:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:49:00,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:49:00,314 INFO L175 Difference]: Start difference. First operand has 135 places, 197 transitions, 2789 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:49:00,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 227 transitions, 3373 flow [2024-06-21 18:49:00,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 227 transitions, 3275 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:00,376 INFO L231 Difference]: Finished difference. Result has 142 places, 199 transitions, 3001 flow [2024-06-21 18:49:00,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2691, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3001, PETRI_PLACES=142, PETRI_TRANSITIONS=199} [2024-06-21 18:49:00,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 18:49:00,377 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 199 transitions, 3001 flow [2024-06-21 18:49:00,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:00,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:00,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:49:00,377 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:00,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash 527483291, now seen corresponding path program 3 times [2024-06-21 18:49:00,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:00,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384008978] [2024-06-21 18:49:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:00,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:01,788 INFO 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 18:49:01,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:01,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384008978] [2024-06-21 18:49:01,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384008978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:01,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77921265] [2024-06-21 18:49:01,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:01,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:01,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:01,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:01,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 199 transitions, 3001 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:01,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:01,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:01,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:02,728 INFO L124 PetriNetUnfolderBase]: 2454/3762 cut-off events. [2024-06-21 18:49:02,729 INFO L125 PetriNetUnfolderBase]: For 108123/108123 co-relation queries the response was YES. [2024-06-21 18:49:02,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23264 conditions, 3762 events. 2454/3762 cut-off events. For 108123/108123 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19501 event pairs, 437 based on Foata normal form. 4/3757 useless extension candidates. Maximal degree in co-relation 23191. Up to 2642 conditions per place. [2024-06-21 18:49:02,758 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 95 selfloop transitions, 139 changer transitions 0/238 dead transitions. [2024-06-21 18:49:02,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 238 transitions, 3773 flow [2024-06-21 18:49:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 18:49:02,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 18:49:02,760 INFO L175 Difference]: Start difference. First operand has 142 places, 199 transitions, 3001 flow. Second operand 9 states and 159 transitions. [2024-06-21 18:49:02,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 238 transitions, 3773 flow [2024-06-21 18:49:02,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 238 transitions, 3483 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:02,864 INFO L231 Difference]: Finished difference. Result has 145 places, 204 transitions, 3114 flow [2024-06-21 18:49:02,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3114, PETRI_PLACES=145, PETRI_TRANSITIONS=204} [2024-06-21 18:49:02,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 18:49:02,865 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 204 transitions, 3114 flow [2024-06-21 18:49:02,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:02,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:02,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:02,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:49:02,865 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:02,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1475064887, now seen corresponding path program 4 times [2024-06-21 18:49:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:02,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96669396] [2024-06-21 18:49:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:04,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96669396] [2024-06-21 18:49:04,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96669396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:04,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:04,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011242622] [2024-06-21 18:49:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:04,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:04,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 204 transitions, 3114 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:04,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:04,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:04,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:05,303 INFO L124 PetriNetUnfolderBase]: 2471/3789 cut-off events. [2024-06-21 18:49:05,304 INFO L125 PetriNetUnfolderBase]: For 116253/116253 co-relation queries the response was YES. [2024-06-21 18:49:05,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23988 conditions, 3789 events. 2471/3789 cut-off events. For 116253/116253 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19638 event pairs, 576 based on Foata normal form. 4/3784 useless extension candidates. Maximal degree in co-relation 23913. Up to 3082 conditions per place. [2024-06-21 18:49:05,334 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 103 selfloop transitions, 128 changer transitions 0/235 dead transitions. [2024-06-21 18:49:05,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 235 transitions, 3732 flow [2024-06-21 18:49:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:49:05,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 18:49:05,336 INFO L175 Difference]: Start difference. First operand has 145 places, 204 transitions, 3114 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:49:05,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 235 transitions, 3732 flow [2024-06-21 18:49:05,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 235 transitions, 3467 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:05,439 INFO L231 Difference]: Finished difference. Result has 149 places, 206 transitions, 3162 flow [2024-06-21 18:49:05,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3162, PETRI_PLACES=149, PETRI_TRANSITIONS=206} [2024-06-21 18:49:05,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 18:49:05,440 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 206 transitions, 3162 flow [2024-06-21 18:49:05,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:05,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:05,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:05,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:49:05,440 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 18:49:05,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash 921292435, now seen corresponding path program 2 times [2024-06-21 18:49:05,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:05,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753653734] [2024-06-21 18:49:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:05,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:06,160 INFO 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 18:49:06,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:06,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753653734] [2024-06-21 18:49:06,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753653734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:06,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:06,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364450857] [2024-06-21 18:49:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:06,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:06,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:06,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 206 transitions, 3162 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:06,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:06,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:06,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:06,746 INFO L124 PetriNetUnfolderBase]: 2476/3825 cut-off events. [2024-06-21 18:49:06,746 INFO L125 PetriNetUnfolderBase]: For 119802/119808 co-relation queries the response was YES. [2024-06-21 18:49:06,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24145 conditions, 3825 events. 2476/3825 cut-off events. For 119802/119808 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20119 event pairs, 704 based on Foata normal form. 7/3831 useless extension candidates. Maximal degree in co-relation 24069. Up to 3672 conditions per place. [2024-06-21 18:49:06,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 28 changer transitions 0/222 dead transitions. [2024-06-21 18:49:06,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 222 transitions, 3764 flow [2024-06-21 18:49:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 18:49:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:49:06,781 INFO L175 Difference]: Start difference. First operand has 149 places, 206 transitions, 3162 flow. Second operand 6 states and 99 transitions. [2024-06-21 18:49:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 222 transitions, 3764 flow [2024-06-21 18:49:06,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 222 transitions, 3448 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:06,903 INFO L231 Difference]: Finished difference. Result has 148 places, 212 transitions, 2986 flow [2024-06-21 18:49:06,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2986, PETRI_PLACES=148, PETRI_TRANSITIONS=212} [2024-06-21 18:49:06,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 18:49:06,904 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 212 transitions, 2986 flow [2024-06-21 18:49:06,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:06,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:06,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:06,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:49:06,904 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 18:49:06,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 114498777, now seen corresponding path program 3 times [2024-06-21 18:49:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004496925] [2024-06-21 18:49:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:07,602 INFO 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 18:49:07,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004496925] [2024-06-21 18:49:07,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004496925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:07,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:07,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070839235] [2024-06-21 18:49:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:07,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:07,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:07,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 212 transitions, 2986 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:07,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:07,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:07,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:08,437 INFO L124 PetriNetUnfolderBase]: 2504/3861 cut-off events. [2024-06-21 18:49:08,438 INFO L125 PetriNetUnfolderBase]: For 122464/122466 co-relation queries the response was YES. [2024-06-21 18:49:08,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24106 conditions, 3861 events. 2504/3861 cut-off events. For 122464/122466 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20304 event pairs, 679 based on Foata normal form. 6/3866 useless extension candidates. Maximal degree in co-relation 24030. Up to 3551 conditions per place. [2024-06-21 18:49:08,462 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 179 selfloop transitions, 58 changer transitions 0/241 dead transitions. [2024-06-21 18:49:08,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 241 transitions, 3584 flow [2024-06-21 18:49:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 18:49:08,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 18:49:08,464 INFO L175 Difference]: Start difference. First operand has 148 places, 212 transitions, 2986 flow. Second operand 8 states and 141 transitions. [2024-06-21 18:49:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 241 transitions, 3584 flow [2024-06-21 18:49:08,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 241 transitions, 3533 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:08,568 INFO L231 Difference]: Finished difference. Result has 154 places, 216 transitions, 3119 flow [2024-06-21 18:49:08,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3119, PETRI_PLACES=154, PETRI_TRANSITIONS=216} [2024-06-21 18:49:08,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 18:49:08,568 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 216 transitions, 3119 flow [2024-06-21 18:49:08,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:08,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:08,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:08,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:49:08,569 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 18:49:08,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2065523915, now seen corresponding path program 4 times [2024-06-21 18:49:08,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:08,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652215042] [2024-06-21 18:49:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:08,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:09,353 INFO 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 18:49:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652215042] [2024-06-21 18:49:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652215042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994652903] [2024-06-21 18:49:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:09,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:09,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 216 transitions, 3119 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:09,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:09,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:09,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:10,263 INFO L124 PetriNetUnfolderBase]: 2572/3980 cut-off events. [2024-06-21 18:49:10,264 INFO L125 PetriNetUnfolderBase]: For 132334/132336 co-relation queries the response was YES. [2024-06-21 18:49:10,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25166 conditions, 3980 events. 2572/3980 cut-off events. For 132334/132336 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21309 event pairs, 702 based on Foata normal form. 6/3985 useless extension candidates. Maximal degree in co-relation 25088. Up to 3541 conditions per place. [2024-06-21 18:49:10,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 187 selfloop transitions, 62 changer transitions 0/253 dead transitions. [2024-06-21 18:49:10,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 253 transitions, 3785 flow [2024-06-21 18:49:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:49:10,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 18:49:10,302 INFO L175 Difference]: Start difference. First operand has 154 places, 216 transitions, 3119 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:49:10,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 253 transitions, 3785 flow [2024-06-21 18:49:10,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 253 transitions, 3662 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:10,444 INFO L231 Difference]: Finished difference. Result has 158 places, 226 transitions, 3257 flow [2024-06-21 18:49:10,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3257, PETRI_PLACES=158, PETRI_TRANSITIONS=226} [2024-06-21 18:49:10,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 18:49:10,445 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 226 transitions, 3257 flow [2024-06-21 18:49:10,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:10,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:10,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:10,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:49:10,446 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 18:49:10,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:10,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1460985449, now seen corresponding path program 5 times [2024-06-21 18:49:10,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:10,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535087996] [2024-06-21 18:49:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:10,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:11,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:11,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535087996] [2024-06-21 18:49:11,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535087996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:11,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:11,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122330991] [2024-06-21 18:49:11,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:11,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:11,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:11,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:49:11,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 226 transitions, 3257 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 18:49:11,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:11,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:49:11,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:11,903 INFO L124 PetriNetUnfolderBase]: 2144/3557 cut-off events. [2024-06-21 18:49:11,903 INFO L125 PetriNetUnfolderBase]: For 136218/136301 co-relation queries the response was YES. [2024-06-21 18:49:11,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23363 conditions, 3557 events. 2144/3557 cut-off events. For 136218/136301 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20671 event pairs, 463 based on Foata normal form. 78/3596 useless extension candidates. Maximal degree in co-relation 23283. Up to 2614 conditions per place. [2024-06-21 18:49:11,933 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 81 changer transitions 0/259 dead transitions. [2024-06-21 18:49:11,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 259 transitions, 3833 flow [2024-06-21 18:49:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 18:49:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-21 18:49:11,935 INFO L175 Difference]: Start difference. First operand has 158 places, 226 transitions, 3257 flow. Second operand 7 states and 141 transitions. [2024-06-21 18:49:11,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 259 transitions, 3833 flow [2024-06-21 18:49:12,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3702 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:12,085 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 3512 flow [2024-06-21 18:49:12,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3126, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=162, PETRI_TRANSITIONS=238} [2024-06-21 18:49:12,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 18:49:12,087 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 3512 flow [2024-06-21 18:49:12,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 18:49:12,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:12,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:12,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:49:12,087 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 18:49:12,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -979704921, now seen corresponding path program 5 times [2024-06-21 18:49:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299576065] [2024-06-21 18:49:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:12,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:13,505 INFO 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 18:49:13,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299576065] [2024-06-21 18:49:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299576065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:13,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612022] [2024-06-21 18:49:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:13,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:13,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:13,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:13,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 238 transitions, 3512 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:13,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:13,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:13,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:14,673 INFO L124 PetriNetUnfolderBase]: 2698/4180 cut-off events. [2024-06-21 18:49:14,673 INFO L125 PetriNetUnfolderBase]: For 151397/151397 co-relation queries the response was YES. [2024-06-21 18:49:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26724 conditions, 4180 events. 2698/4180 cut-off events. For 151397/151397 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22516 event pairs, 608 based on Foata normal form. 32/4210 useless extension candidates. Maximal degree in co-relation 26641. Up to 3174 conditions per place. [2024-06-21 18:49:14,704 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 156 selfloop transitions, 126 changer transitions 0/286 dead transitions. [2024-06-21 18:49:14,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 286 transitions, 4357 flow [2024-06-21 18:49:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 18:49:14,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-21 18:49:14,706 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 3512 flow. Second operand 10 states and 183 transitions. [2024-06-21 18:49:14,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 286 transitions, 4357 flow [2024-06-21 18:49:14,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 286 transitions, 4229 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:14,880 INFO L231 Difference]: Finished difference. Result has 170 places, 247 transitions, 3827 flow [2024-06-21 18:49:14,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3827, PETRI_PLACES=170, PETRI_TRANSITIONS=247} [2024-06-21 18:49:14,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-21 18:49:14,881 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 247 transitions, 3827 flow [2024-06-21 18:49:14,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:14,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:14,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:14,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:49:14,882 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:14,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash -43005415, now seen corresponding path program 3 times [2024-06-21 18:49:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:14,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333067762] [2024-06-21 18:49:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:14,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:15,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:15,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333067762] [2024-06-21 18:49:15,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333067762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:15,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:15,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012620944] [2024-06-21 18:49:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:15,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:15,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:15,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 247 transitions, 3827 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:15,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:15,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:15,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:16,286 INFO L124 PetriNetUnfolderBase]: 2700/4201 cut-off events. [2024-06-21 18:49:16,287 INFO L125 PetriNetUnfolderBase]: For 146478/146482 co-relation queries the response was YES. [2024-06-21 18:49:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27231 conditions, 4201 events. 2700/4201 cut-off events. For 146478/146482 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22941 event pairs, 886 based on Foata normal form. 5/4205 useless extension candidates. Maximal degree in co-relation 27146. Up to 4036 conditions per place. [2024-06-21 18:49:16,314 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 24 changer transitions 0/268 dead transitions. [2024-06-21 18:49:16,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 268 transitions, 4452 flow [2024-06-21 18:49:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 18:49:16,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-21 18:49:16,316 INFO L175 Difference]: Start difference. First operand has 170 places, 247 transitions, 3827 flow. Second operand 7 states and 116 transitions. [2024-06-21 18:49:16,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 268 transitions, 4452 flow [2024-06-21 18:49:16,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 268 transitions, 4145 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:16,497 INFO L231 Difference]: Finished difference. Result has 171 places, 251 transitions, 3633 flow [2024-06-21 18:49:16,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3633, PETRI_PLACES=171, PETRI_TRANSITIONS=251} [2024-06-21 18:49:16,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-21 18:49:16,497 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 251 transitions, 3633 flow [2024-06-21 18:49:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:16,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:49:16,498 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:16,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -757642091, now seen corresponding path program 1 times [2024-06-21 18:49:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:16,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305060297] [2024-06-21 18:49:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:17,175 INFO 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 18:49:17,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305060297] [2024-06-21 18:49:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305060297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902053177] [2024-06-21 18:49:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:17,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:17,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:17,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:17,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 251 transitions, 3633 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:17,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:17,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:17,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:17,853 INFO L124 PetriNetUnfolderBase]: 2501/3973 cut-off events. [2024-06-21 18:49:17,854 INFO L125 PetriNetUnfolderBase]: For 117160/117160 co-relation queries the response was YES. [2024-06-21 18:49:17,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24132 conditions, 3973 events. 2501/3973 cut-off events. For 117160/117160 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22212 event pairs, 868 based on Foata normal form. 1/3973 useless extension candidates. Maximal degree in co-relation 24045. Up to 3766 conditions per place. [2024-06-21 18:49:17,886 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 13 changer transitions 0/265 dead transitions. [2024-06-21 18:49:17,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 265 transitions, 4227 flow [2024-06-21 18:49:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 18:49:17,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:49:17,887 INFO L175 Difference]: Start difference. First operand has 171 places, 251 transitions, 3633 flow. Second operand 7 states and 112 transitions. [2024-06-21 18:49:17,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 265 transitions, 4227 flow [2024-06-21 18:49:18,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 265 transitions, 4165 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:18,051 INFO L231 Difference]: Finished difference. Result has 173 places, 254 transitions, 3643 flow [2024-06-21 18:49:18,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3643, PETRI_PLACES=173, PETRI_TRANSITIONS=254} [2024-06-21 18:49:18,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-21 18:49:18,052 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 254 transitions, 3643 flow [2024-06-21 18:49:18,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:18,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:18,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:18,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:49:18,053 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 18:49:18,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash -745873871, now seen corresponding path program 2 times [2024-06-21 18:49:18,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:18,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029304302] [2024-06-21 18:49:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:18,789 INFO 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 18:49:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:18,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029304302] [2024-06-21 18:49:18,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029304302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:18,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:18,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835997896] [2024-06-21 18:49:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:18,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:18,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:18,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:18,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 254 transitions, 3643 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:18,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:18,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:18,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:19,434 INFO L124 PetriNetUnfolderBase]: 2498/3970 cut-off events. [2024-06-21 18:49:19,434 INFO L125 PetriNetUnfolderBase]: For 121193/121195 co-relation queries the response was YES. [2024-06-21 18:49:19,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24429 conditions, 3970 events. 2498/3970 cut-off events. For 121193/121195 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22165 event pairs, 872 based on Foata normal form. 3/3972 useless extension candidates. Maximal degree in co-relation 24341. Up to 3756 conditions per place. [2024-06-21 18:49:19,470 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 18 changer transitions 0/265 dead transitions. [2024-06-21 18:49:19,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 265 transitions, 4229 flow [2024-06-21 18:49:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 18:49:19,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:49:19,471 INFO L175 Difference]: Start difference. First operand has 173 places, 254 transitions, 3643 flow. Second operand 6 states and 102 transitions. [2024-06-21 18:49:19,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 265 transitions, 4229 flow [2024-06-21 18:49:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 265 transitions, 4179 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:19,625 INFO L231 Difference]: Finished difference. Result has 174 places, 257 transitions, 3681 flow [2024-06-21 18:49:19,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3681, PETRI_PLACES=174, PETRI_TRANSITIONS=257} [2024-06-21 18:49:19,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 18:49:19,626 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 257 transitions, 3681 flow [2024-06-21 18:49:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:19,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:49:19,627 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:19,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1558641613, now seen corresponding path program 1 times [2024-06-21 18:49:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:19,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214236522] [2024-06-21 18:49:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:20,692 INFO 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 18:49:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214236522] [2024-06-21 18:49:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214236522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655275758] [2024-06-21 18:49:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:20,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:20,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:20,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 257 transitions, 3681 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:20,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:20,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:20,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:21,700 INFO L124 PetriNetUnfolderBase]: 2760/4289 cut-off events. [2024-06-21 18:49:21,701 INFO L125 PetriNetUnfolderBase]: For 154509/154509 co-relation queries the response was YES. [2024-06-21 18:49:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27300 conditions, 4289 events. 2760/4289 cut-off events. For 154509/154509 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23327 event pairs, 566 based on Foata normal form. 16/4301 useless extension candidates. Maximal degree in co-relation 27211. Up to 3115 conditions per place. [2024-06-21 18:49:21,742 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 161 selfloop transitions, 128 changer transitions 0/293 dead transitions. [2024-06-21 18:49:21,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 293 transitions, 4417 flow [2024-06-21 18:49:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:49:21,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:49:21,748 INFO L175 Difference]: Start difference. First operand has 174 places, 257 transitions, 3681 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:49:21,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 293 transitions, 4417 flow [2024-06-21 18:49:21,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 293 transitions, 4351 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:21,938 INFO L231 Difference]: Finished difference. Result has 179 places, 258 transitions, 3913 flow [2024-06-21 18:49:21,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3913, PETRI_PLACES=179, PETRI_TRANSITIONS=258} [2024-06-21 18:49:21,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-21 18:49:21,939 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 258 transitions, 3913 flow [2024-06-21 18:49:21,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:21,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:21,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:49:21,939 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:21,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1647207373, now seen corresponding path program 2 times [2024-06-21 18:49:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:21,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764882510] [2024-06-21 18:49:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:22,931 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 18:49:22,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764882510] [2024-06-21 18:49:22,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764882510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:22,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:22,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:22,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690590396] [2024-06-21 18:49:22,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:22,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:22,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:23,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:23,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 258 transitions, 3913 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:23,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:23,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:23,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:23,882 INFO L124 PetriNetUnfolderBase]: 2929/4578 cut-off events. [2024-06-21 18:49:23,883 INFO L125 PetriNetUnfolderBase]: For 180264/180264 co-relation queries the response was YES. [2024-06-21 18:49:23,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30236 conditions, 4578 events. 2929/4578 cut-off events. For 180264/180264 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25491 event pairs, 661 based on Foata normal form. 16/4590 useless extension candidates. Maximal degree in co-relation 30146. Up to 2777 conditions per place. [2024-06-21 18:49:23,925 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 128 changer transitions 0/297 dead transitions. [2024-06-21 18:49:23,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 297 transitions, 4815 flow [2024-06-21 18:49:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 18:49:23,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 18:49:23,927 INFO L175 Difference]: Start difference. First operand has 179 places, 258 transitions, 3913 flow. Second operand 9 states and 163 transitions. [2024-06-21 18:49:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 297 transitions, 4815 flow [2024-06-21 18:49:24,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 297 transitions, 4532 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:24,149 INFO L231 Difference]: Finished difference. Result has 181 places, 260 transitions, 3961 flow [2024-06-21 18:49:24,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3961, PETRI_PLACES=181, PETRI_TRANSITIONS=260} [2024-06-21 18:49:24,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-21 18:49:24,149 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 260 transitions, 3961 flow [2024-06-21 18:49:24,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:24,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:24,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:24,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:49:24,150 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 18:49:24,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2015384657, now seen corresponding path program 3 times [2024-06-21 18:49:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217431397] [2024-06-21 18:49:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:25,162 INFO 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 18:49:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217431397] [2024-06-21 18:49:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217431397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:25,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:25,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:25,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514929801] [2024-06-21 18:49:25,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:25,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:25,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:25,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 260 transitions, 3961 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:25,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:25,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:25,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:26,313 INFO L124 PetriNetUnfolderBase]: 3048/4796 cut-off events. [2024-06-21 18:49:26,313 INFO L125 PetriNetUnfolderBase]: For 195888/195888 co-relation queries the response was YES. [2024-06-21 18:49:26,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31740 conditions, 4796 events. 3048/4796 cut-off events. For 195888/195888 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27251 event pairs, 717 based on Foata normal form. 16/4808 useless extension candidates. Maximal degree in co-relation 31650. Up to 3584 conditions per place. [2024-06-21 18:49:26,357 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 132 changer transitions 0/302 dead transitions. [2024-06-21 18:49:26,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 302 transitions, 4916 flow [2024-06-21 18:49:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 18:49:26,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 18:49:26,362 INFO L175 Difference]: Start difference. First operand has 181 places, 260 transitions, 3961 flow. Second operand 9 states and 166 transitions. [2024-06-21 18:49:26,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 302 transitions, 4916 flow [2024-06-21 18:49:26,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 302 transitions, 4770 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:26,623 INFO L231 Difference]: Finished difference. Result has 185 places, 262 transitions, 4157 flow [2024-06-21 18:49:26,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4157, PETRI_PLACES=185, PETRI_TRANSITIONS=262} [2024-06-21 18:49:26,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-21 18:49:26,625 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 262 transitions, 4157 flow [2024-06-21 18:49:26,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:26,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:26,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:26,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:49:26,626 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:26,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:26,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2015532527, now seen corresponding path program 4 times [2024-06-21 18:49:26,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:26,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108636850] [2024-06-21 18:49:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:26,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:27,605 INFO 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 18:49:27,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:27,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108636850] [2024-06-21 18:49:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108636850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:27,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:27,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272799929] [2024-06-21 18:49:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:27,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:27,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:27,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:27,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 262 transitions, 4157 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:27,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:27,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:27,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:28,730 INFO L124 PetriNetUnfolderBase]: 3123/4921 cut-off events. [2024-06-21 18:49:28,731 INFO L125 PetriNetUnfolderBase]: For 208583/208583 co-relation queries the response was YES. [2024-06-21 18:49:28,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33147 conditions, 4921 events. 3123/4921 cut-off events. For 208583/208583 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28233 event pairs, 762 based on Foata normal form. 20/4937 useless extension candidates. Maximal degree in co-relation 33055. Up to 4014 conditions per place. [2024-06-21 18:49:28,777 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 167 selfloop transitions, 125 changer transitions 0/296 dead transitions. [2024-06-21 18:49:28,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 296 transitions, 4914 flow [2024-06-21 18:49:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 18:49:28,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 18:49:28,778 INFO L175 Difference]: Start difference. First operand has 185 places, 262 transitions, 4157 flow. Second operand 9 states and 160 transitions. [2024-06-21 18:49:28,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 296 transitions, 4914 flow [2024-06-21 18:49:29,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 296 transitions, 4645 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:29,054 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 4189 flow [2024-06-21 18:49:29,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4189, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2024-06-21 18:49:29,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 18:49:29,055 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 4189 flow [2024-06-21 18:49:29,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:29,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:29,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:29,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:49:29,055 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 18:49:29,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2020894907, now seen corresponding path program 5 times [2024-06-21 18:49:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:29,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826583516] [2024-06-21 18:49:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:29,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:30,048 INFO 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 18:49:30,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826583516] [2024-06-21 18:49:30,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826583516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:30,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:30,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729718992] [2024-06-21 18:49:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:30,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:30,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:30,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 4189 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:30,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:30,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:30,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:31,216 INFO L124 PetriNetUnfolderBase]: 3198/5044 cut-off events. [2024-06-21 18:49:31,216 INFO L125 PetriNetUnfolderBase]: For 215465/215465 co-relation queries the response was YES. [2024-06-21 18:49:31,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34280 conditions, 5044 events. 3198/5044 cut-off events. For 215465/215465 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29169 event pairs, 758 based on Foata normal form. 20/5060 useless extension candidates. Maximal degree in co-relation 34186. Up to 4139 conditions per place. [2024-06-21 18:49:31,266 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 118 changer transitions 0/295 dead transitions. [2024-06-21 18:49:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 295 transitions, 4919 flow [2024-06-21 18:49:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 18:49:31,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 18:49:31,268 INFO L175 Difference]: Start difference. First operand has 188 places, 263 transitions, 4189 flow. Second operand 9 states and 158 transitions. [2024-06-21 18:49:31,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 295 transitions, 4919 flow [2024-06-21 18:49:31,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 295 transitions, 4600 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:31,578 INFO L231 Difference]: Finished difference. Result has 189 places, 264 transitions, 4157 flow [2024-06-21 18:49:31,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4157, PETRI_PLACES=189, PETRI_TRANSITIONS=264} [2024-06-21 18:49:31,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-21 18:49:31,579 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 264 transitions, 4157 flow [2024-06-21 18:49:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:31,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:31,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:49:31,579 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 18:49:31,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash -835051077, now seen corresponding path program 1 times [2024-06-21 18:49:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489084349] [2024-06-21 18:49:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:32,977 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 18:49:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489084349] [2024-06-21 18:49:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489084349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:32,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483421911] [2024-06-21 18:49:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:32,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:32,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:32,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:33,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 264 transitions, 4157 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:33,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:33,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:33,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:34,130 INFO L124 PetriNetUnfolderBase]: 3239/5123 cut-off events. [2024-06-21 18:49:34,131 INFO L125 PetriNetUnfolderBase]: For 219237/219237 co-relation queries the response was YES. [2024-06-21 18:49:34,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34716 conditions, 5123 events. 3239/5123 cut-off events. For 219237/219237 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29869 event pairs, 726 based on Foata normal form. 12/5131 useless extension candidates. Maximal degree in co-relation 34622. Up to 3714 conditions per place. [2024-06-21 18:49:34,173 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 119 changer transitions 0/298 dead transitions. [2024-06-21 18:49:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 298 transitions, 4899 flow [2024-06-21 18:49:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 18:49:34,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 18:49:34,175 INFO L175 Difference]: Start difference. First operand has 189 places, 264 transitions, 4157 flow. Second operand 9 states and 159 transitions. [2024-06-21 18:49:34,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 298 transitions, 4899 flow [2024-06-21 18:49:34,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 298 transitions, 4580 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:34,458 INFO L231 Difference]: Finished difference. Result has 190 places, 265 transitions, 4122 flow [2024-06-21 18:49:34,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4122, PETRI_PLACES=190, PETRI_TRANSITIONS=265} [2024-06-21 18:49:34,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-21 18:49:34,459 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 265 transitions, 4122 flow [2024-06-21 18:49:34,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:34,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:34,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:49:34,460 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:34,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash 589477125, now seen corresponding path program 1 times [2024-06-21 18:49:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:34,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007203439] [2024-06-21 18:49:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:35,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:35,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007203439] [2024-06-21 18:49:35,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007203439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:35,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:35,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:35,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236121306] [2024-06-21 18:49:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:35,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:35,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:35,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:35,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 265 transitions, 4122 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:35,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:35,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:35,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:36,045 INFO L124 PetriNetUnfolderBase]: 3249/5140 cut-off events. [2024-06-21 18:49:36,046 INFO L125 PetriNetUnfolderBase]: For 217653/217655 co-relation queries the response was YES. [2024-06-21 18:49:36,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34856 conditions, 5140 events. 3249/5140 cut-off events. For 217653/217655 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30062 event pairs, 918 based on Foata normal form. 4/5143 useless extension candidates. Maximal degree in co-relation 34762. Up to 4785 conditions per place. [2024-06-21 18:49:36,089 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 61 changer transitions 0/285 dead transitions. [2024-06-21 18:49:36,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 285 transitions, 4805 flow [2024-06-21 18:49:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 18:49:36,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 18:49:36,091 INFO L175 Difference]: Start difference. First operand has 190 places, 265 transitions, 4122 flow. Second operand 7 states and 124 transitions. [2024-06-21 18:49:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 285 transitions, 4805 flow [2024-06-21 18:49:36,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 285 transitions, 4578 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:36,390 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 4086 flow [2024-06-21 18:49:36,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4086, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-21 18:49:36,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 18:49:36,390 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 4086 flow [2024-06-21 18:49:36,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:36,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:36,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:36,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:49:36,391 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:36,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash 589775655, now seen corresponding path program 2 times [2024-06-21 18:49:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063528838] [2024-06-21 18:49:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:37,210 INFO 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 18:49:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063528838] [2024-06-21 18:49:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063528838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:37,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504886641] [2024-06-21 18:49:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:37,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:37,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:37,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:37,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 4086 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:37,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:37,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:37,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:38,063 INFO L124 PetriNetUnfolderBase]: 3277/5184 cut-off events. [2024-06-21 18:49:38,063 INFO L125 PetriNetUnfolderBase]: For 225121/225123 co-relation queries the response was YES. [2024-06-21 18:49:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35467 conditions, 5184 events. 3277/5184 cut-off events. For 225121/225123 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30360 event pairs, 918 based on Foata normal form. 4/5187 useless extension candidates. Maximal degree in co-relation 35372. Up to 4781 conditions per place. [2024-06-21 18:49:38,112 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 62 changer transitions 0/290 dead transitions. [2024-06-21 18:49:38,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 290 transitions, 4896 flow [2024-06-21 18:49:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 18:49:38,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 18:49:38,113 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 4086 flow. Second operand 7 states and 122 transitions. [2024-06-21 18:49:38,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 290 transitions, 4896 flow [2024-06-21 18:49:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 290 transitions, 4690 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:38,445 INFO L231 Difference]: Finished difference. Result has 194 places, 277 transitions, 4161 flow [2024-06-21 18:49:38,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4161, PETRI_PLACES=194, PETRI_TRANSITIONS=277} [2024-06-21 18:49:38,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 18:49:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 277 transitions, 4161 flow [2024-06-21 18:49:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:38,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:38,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:38,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:49:38,447 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 18:49:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 589776027, now seen corresponding path program 1 times [2024-06-21 18:49:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227769744] [2024-06-21 18:49:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:39,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227769744] [2024-06-21 18:49:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227769744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:39,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:39,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:39,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090393882] [2024-06-21 18:49:39,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:39,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:39,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:39,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 277 transitions, 4161 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:39,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:39,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:39,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:40,369 INFO L124 PetriNetUnfolderBase]: 3282/5195 cut-off events. [2024-06-21 18:49:40,369 INFO L125 PetriNetUnfolderBase]: For 234225/234229 co-relation queries the response was YES. [2024-06-21 18:49:40,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36269 conditions, 5195 events. 3282/5195 cut-off events. For 234225/234229 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30474 event pairs, 999 based on Foata normal form. 5/5199 useless extension candidates. Maximal degree in co-relation 36171. Up to 4993 conditions per place. [2024-06-21 18:49:40,420 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 26 changer transitions 0/292 dead transitions. [2024-06-21 18:49:40,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 292 transitions, 4817 flow [2024-06-21 18:49:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 18:49:40,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-21 18:49:40,426 INFO L175 Difference]: Start difference. First operand has 194 places, 277 transitions, 4161 flow. Second operand 8 states and 121 transitions. [2024-06-21 18:49:40,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 292 transitions, 4817 flow [2024-06-21 18:49:40,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 292 transitions, 4704 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:40,770 INFO L231 Difference]: Finished difference. Result has 199 places, 280 transitions, 4155 flow [2024-06-21 18:49:40,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4155, PETRI_PLACES=199, PETRI_TRANSITIONS=280} [2024-06-21 18:49:40,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 18:49:40,773 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 280 transitions, 4155 flow [2024-06-21 18:49:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:40,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:40,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:49:40,773 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:40,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1240287121, now seen corresponding path program 6 times [2024-06-21 18:49:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397541737] [2024-06-21 18:49:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:41,845 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 18:49:41,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:41,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397541737] [2024-06-21 18:49:41,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397541737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:41,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:41,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46311297] [2024-06-21 18:49:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:41,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:41,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:41,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 280 transitions, 4155 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:41,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:41,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:41,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:43,006 INFO L124 PetriNetUnfolderBase]: 3246/5138 cut-off events. [2024-06-21 18:49:43,007 INFO L125 PetriNetUnfolderBase]: For 241216/241218 co-relation queries the response was YES. [2024-06-21 18:49:43,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35624 conditions, 5138 events. 3246/5138 cut-off events. For 241216/241218 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30059 event pairs, 748 based on Foata normal form. 22/5159 useless extension candidates. Maximal degree in co-relation 35524. Up to 4223 conditions per place. [2024-06-21 18:49:43,061 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 191 selfloop transitions, 115 changer transitions 0/310 dead transitions. [2024-06-21 18:49:43,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 310 transitions, 4885 flow [2024-06-21 18:49:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:49:43,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:49:43,063 INFO L175 Difference]: Start difference. First operand has 199 places, 280 transitions, 4155 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:49:43,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 310 transitions, 4885 flow [2024-06-21 18:49:43,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 310 transitions, 4780 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:43,481 INFO L231 Difference]: Finished difference. Result has 202 places, 280 transitions, 4291 flow [2024-06-21 18:49:43,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4291, PETRI_PLACES=202, PETRI_TRANSITIONS=280} [2024-06-21 18:49:43,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 18:49:43,482 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 280 transitions, 4291 flow [2024-06-21 18:49:43,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:43,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:43,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:43,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:49:43,483 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:43,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1021592847, now seen corresponding path program 2 times [2024-06-21 18:49:43,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:43,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2452937] [2024-06-21 18:49:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:43,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:44,994 INFO 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 18:49:44,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:44,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2452937] [2024-06-21 18:49:44,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2452937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:44,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:44,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:44,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798700717] [2024-06-21 18:49:44,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:44,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:45,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:45,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 280 transitions, 4291 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:45,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:45,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:45,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:46,277 INFO L124 PetriNetUnfolderBase]: 3226/5104 cut-off events. [2024-06-21 18:49:46,277 INFO L125 PetriNetUnfolderBase]: For 235955/235957 co-relation queries the response was YES. [2024-06-21 18:49:46,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35485 conditions, 5104 events. 3226/5104 cut-off events. For 235955/235957 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29738 event pairs, 723 based on Foata normal form. 14/5117 useless extension candidates. Maximal degree in co-relation 35385. Up to 4101 conditions per place. [2024-06-21 18:49:46,330 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 116 changer transitions 0/312 dead transitions. [2024-06-21 18:49:46,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 312 transitions, 5035 flow [2024-06-21 18:49:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:49:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:49:46,332 INFO L175 Difference]: Start difference. First operand has 202 places, 280 transitions, 4291 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:49:46,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 312 transitions, 5035 flow [2024-06-21 18:49:46,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 312 transitions, 4744 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:46,685 INFO L231 Difference]: Finished difference. Result has 203 places, 280 transitions, 4238 flow [2024-06-21 18:49:46,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4238, PETRI_PLACES=203, PETRI_TRANSITIONS=280} [2024-06-21 18:49:46,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 18:49:46,686 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 280 transitions, 4238 flow [2024-06-21 18:49:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:46,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:46,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:46,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:49:46,686 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:46,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255787, now seen corresponding path program 3 times [2024-06-21 18:49:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:46,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950772203] [2024-06-21 18:49:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:48,077 INFO 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 18:49:48,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950772203] [2024-06-21 18:49:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950772203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:48,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:48,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:48,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798549416] [2024-06-21 18:49:48,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:48,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:48,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 280 transitions, 4238 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:48,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:48,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:48,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:49,156 INFO L124 PetriNetUnfolderBase]: 3353/5319 cut-off events. [2024-06-21 18:49:49,156 INFO L125 PetriNetUnfolderBase]: For 259843/259845 co-relation queries the response was YES. [2024-06-21 18:49:49,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37355 conditions, 5319 events. 3353/5319 cut-off events. For 259843/259845 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31327 event pairs, 639 based on Foata normal form. 14/5332 useless extension candidates. Maximal degree in co-relation 37255. Up to 3232 conditions per place. [2024-06-21 18:49:49,211 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 127 changer transitions 0/316 dead transitions. [2024-06-21 18:49:49,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 316 transitions, 5220 flow [2024-06-21 18:49:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 18:49:49,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 18:49:49,218 INFO L175 Difference]: Start difference. First operand has 203 places, 280 transitions, 4238 flow. Second operand 9 states and 156 transitions. [2024-06-21 18:49:49,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 316 transitions, 5220 flow [2024-06-21 18:49:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 316 transitions, 4825 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:49:49,650 INFO L231 Difference]: Finished difference. Result has 203 places, 282 transitions, 4173 flow [2024-06-21 18:49:49,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3843, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4173, PETRI_PLACES=203, PETRI_TRANSITIONS=282} [2024-06-21 18:49:49,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 18:49:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 282 transitions, 4173 flow [2024-06-21 18:49:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:49,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:49,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:49:49,652 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 18:49:49,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1504288419, now seen corresponding path program 2 times [2024-06-21 18:49:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528551015] [2024-06-21 18:49:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:50,887 INFO 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 18:49:50,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528551015] [2024-06-21 18:49:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528551015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:50,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:50,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:50,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245330445] [2024-06-21 18:49:50,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:50,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:50,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:50,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:50,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 282 transitions, 4173 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:50,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:50,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:50,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:51,851 INFO L124 PetriNetUnfolderBase]: 3358/5328 cut-off events. [2024-06-21 18:49:51,852 INFO L125 PetriNetUnfolderBase]: For 257737/257743 co-relation queries the response was YES. [2024-06-21 18:49:51,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37033 conditions, 5328 events. 3358/5328 cut-off events. For 257737/257743 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31533 event pairs, 1017 based on Foata normal form. 7/5334 useless extension candidates. Maximal degree in co-relation 36933. Up to 5104 conditions per place. [2024-06-21 18:49:51,902 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 41 changer transitions 0/300 dead transitions. [2024-06-21 18:49:51,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 300 transitions, 4991 flow [2024-06-21 18:49:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 18:49:51,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 18:49:51,916 INFO L175 Difference]: Start difference. First operand has 203 places, 282 transitions, 4173 flow. Second operand 8 states and 120 transitions. [2024-06-21 18:49:51,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 300 transitions, 4991 flow [2024-06-21 18:49:52,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 300 transitions, 4833 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:52,310 INFO L231 Difference]: Finished difference. Result has 207 places, 290 transitions, 4230 flow [2024-06-21 18:49:52,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4230, PETRI_PLACES=207, PETRI_TRANSITIONS=290} [2024-06-21 18:49:52,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 18:49:52,311 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 290 transitions, 4230 flow [2024-06-21 18:49:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:52,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:52,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:52,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:49:52,311 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:52,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1070730169, now seen corresponding path program 3 times [2024-06-21 18:49:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:52,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407183550] [2024-06-21 18:49:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:52,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:53,466 INFO 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 18:49:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407183550] [2024-06-21 18:49:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407183550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:53,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:53,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:53,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636875695] [2024-06-21 18:49:53,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:53,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:53,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:53,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:53,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:53,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 290 transitions, 4230 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:53,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:53,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:54,409 INFO L124 PetriNetUnfolderBase]: 3363/5335 cut-off events. [2024-06-21 18:49:54,409 INFO L125 PetriNetUnfolderBase]: For 263953/263959 co-relation queries the response was YES. [2024-06-21 18:49:54,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37443 conditions, 5335 events. 3363/5335 cut-off events. For 263953/263959 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31590 event pairs, 1017 based on Foata normal form. 7/5341 useless extension candidates. Maximal degree in co-relation 37340. Up to 5125 conditions per place. [2024-06-21 18:49:54,462 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 34 changer transitions 0/302 dead transitions. [2024-06-21 18:49:54,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 302 transitions, 4911 flow [2024-06-21 18:49:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 18:49:54,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-21 18:49:54,464 INFO L175 Difference]: Start difference. First operand has 207 places, 290 transitions, 4230 flow. Second operand 8 states and 118 transitions. [2024-06-21 18:49:54,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 302 transitions, 4911 flow [2024-06-21 18:49:54,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 302 transitions, 4816 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:54,801 INFO L231 Difference]: Finished difference. Result has 211 places, 293 transitions, 4272 flow [2024-06-21 18:49:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4272, PETRI_PLACES=211, PETRI_TRANSITIONS=293} [2024-06-21 18:49:54,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 18:49:54,802 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 293 transitions, 4272 flow [2024-06-21 18:49:54,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:54,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:54,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:49:54,802 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1070729797, now seen corresponding path program 3 times [2024-06-21 18:49:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:54,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213775382] [2024-06-21 18:49:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:55,700 INFO 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 18:49:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213775382] [2024-06-21 18:49:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213775382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:55,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:55,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:55,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43273308] [2024-06-21 18:49:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:55,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:55,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:55,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:55,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 293 transitions, 4272 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:55,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:55,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:56,636 INFO L124 PetriNetUnfolderBase]: 3391/5373 cut-off events. [2024-06-21 18:49:56,637 INFO L125 PetriNetUnfolderBase]: For 277659/277661 co-relation queries the response was YES. [2024-06-21 18:49:56,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38082 conditions, 5373 events. 3391/5373 cut-off events. For 277659/277661 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31753 event pairs, 942 based on Foata normal form. 4/5376 useless extension candidates. Maximal degree in co-relation 37977. Up to 4902 conditions per place. [2024-06-21 18:49:56,790 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 78 changer transitions 0/317 dead transitions. [2024-06-21 18:49:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 317 transitions, 5356 flow [2024-06-21 18:49:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 18:49:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:49:56,792 INFO L175 Difference]: Start difference. First operand has 211 places, 293 transitions, 4272 flow. Second operand 8 states and 128 transitions. [2024-06-21 18:49:56,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 317 transitions, 5356 flow [2024-06-21 18:49:57,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 5258 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:57,164 INFO L231 Difference]: Finished difference. Result has 214 places, 304 transitions, 4544 flow [2024-06-21 18:49:57,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4544, PETRI_PLACES=214, PETRI_TRANSITIONS=304} [2024-06-21 18:49:57,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 18:49:57,164 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 304 transitions, 4544 flow [2024-06-21 18:49:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:57,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:57,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:57,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:49:57,165 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 18:49:57,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1353416917, now seen corresponding path program 7 times [2024-06-21 18:49:57,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:57,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413762717] [2024-06-21 18:49:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:57,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:58,107 INFO 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 18:49:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413762717] [2024-06-21 18:49:58,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413762717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:58,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153324518] [2024-06-21 18:49:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:58,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:58,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 304 transitions, 4544 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:58,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:58,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:59,532 INFO L124 PetriNetUnfolderBase]: 3932/6269 cut-off events. [2024-06-21 18:49:59,532 INFO L125 PetriNetUnfolderBase]: For 325531/325531 co-relation queries the response was YES. [2024-06-21 18:49:59,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43701 conditions, 6269 events. 3932/6269 cut-off events. For 325531/325531 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 38573 event pairs, 935 based on Foata normal form. 16/6283 useless extension candidates. Maximal degree in co-relation 43594. Up to 3973 conditions per place. [2024-06-21 18:49:59,605 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 136 changer transitions 0/364 dead transitions. [2024-06-21 18:49:59,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 364 transitions, 5824 flow [2024-06-21 18:49:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:49:59,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 18:49:59,613 INFO L175 Difference]: Start difference. First operand has 214 places, 304 transitions, 4544 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:49:59,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 364 transitions, 5824 flow [2024-06-21 18:50:00,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 364 transitions, 5681 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:00,160 INFO L231 Difference]: Finished difference. Result has 221 places, 317 transitions, 4975 flow [2024-06-21 18:50:00,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4975, PETRI_PLACES=221, PETRI_TRANSITIONS=317} [2024-06-21 18:50:00,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-21 18:50:00,161 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 317 transitions, 4975 flow [2024-06-21 18:50:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:00,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:00,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:00,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:50:00,161 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 18:50:00,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:00,162 INFO L85 PathProgramCache]: Analyzing trace with hash -946687641, now seen corresponding path program 8 times [2024-06-21 18:50:00,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:00,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983928931] [2024-06-21 18:50:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:00,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:01,086 INFO 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 18:50:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983928931] [2024-06-21 18:50:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983928931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:01,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:01,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845450452] [2024-06-21 18:50:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:01,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 317 transitions, 4975 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:01,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:01,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:01,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:02,407 INFO L124 PetriNetUnfolderBase]: 3990/6356 cut-off events. [2024-06-21 18:50:02,408 INFO L125 PetriNetUnfolderBase]: For 343030/343030 co-relation queries the response was YES. [2024-06-21 18:50:02,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45389 conditions, 6356 events. 3990/6356 cut-off events. For 343030/343030 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 39124 event pairs, 912 based on Foata normal form. 16/6370 useless extension candidates. Maximal degree in co-relation 45279. Up to 5126 conditions per place. [2024-06-21 18:50:02,477 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 226 selfloop transitions, 129 changer transitions 0/359 dead transitions. [2024-06-21 18:50:02,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 359 transitions, 5870 flow [2024-06-21 18:50:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:50:02,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 18:50:02,479 INFO L175 Difference]: Start difference. First operand has 221 places, 317 transitions, 4975 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:50:02,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 359 transitions, 5870 flow [2024-06-21 18:50:03,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 359 transitions, 5719 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:03,024 INFO L231 Difference]: Finished difference. Result has 225 places, 318 transitions, 5132 flow [2024-06-21 18:50:03,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5132, PETRI_PLACES=225, PETRI_TRANSITIONS=318} [2024-06-21 18:50:03,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 18:50:03,025 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 318 transitions, 5132 flow [2024-06-21 18:50:03,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:03,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:03,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:03,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:50:03,026 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 18:50:03,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1954090005, now seen corresponding path program 9 times [2024-06-21 18:50:03,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:03,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069030654] [2024-06-21 18:50:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:03,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:03,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:03,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069030654] [2024-06-21 18:50:03,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069030654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:03,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:03,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:03,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960589872] [2024-06-21 18:50:03,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:03,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:03,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:03,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:50:03,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 318 transitions, 5132 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:03,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:03,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:50:03,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:05,159 INFO L124 PetriNetUnfolderBase]: 3643/6244 cut-off events. [2024-06-21 18:50:05,159 INFO L125 PetriNetUnfolderBase]: For 366768/367083 co-relation queries the response was YES. [2024-06-21 18:50:05,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44436 conditions, 6244 events. 3643/6244 cut-off events. For 366768/367083 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43566 event pairs, 627 based on Foata normal form. 114/6165 useless extension candidates. Maximal degree in co-relation 44324. Up to 2416 conditions per place. [2024-06-21 18:50:05,231 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 148 changer transitions 0/369 dead transitions. [2024-06-21 18:50:05,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 369 transitions, 6157 flow [2024-06-21 18:50:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 18:50:05,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:50:05,233 INFO L175 Difference]: Start difference. First operand has 225 places, 318 transitions, 5132 flow. Second operand 8 states and 164 transitions. [2024-06-21 18:50:05,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 369 transitions, 6157 flow [2024-06-21 18:50:05,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 369 transitions, 5884 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:05,830 INFO L231 Difference]: Finished difference. Result has 228 places, 333 transitions, 5414 flow [2024-06-21 18:50:05,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5414, PETRI_PLACES=228, PETRI_TRANSITIONS=333} [2024-06-21 18:50:05,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 18:50:05,831 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 333 transitions, 5414 flow [2024-06-21 18:50:05,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:05,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:05,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:05,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:50:05,832 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 18:50:05,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -233298193, now seen corresponding path program 10 times [2024-06-21 18:50:05,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:05,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265423762] [2024-06-21 18:50:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:06,694 INFO 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 18:50:06,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:06,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265423762] [2024-06-21 18:50:06,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265423762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:06,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:06,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:06,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032551857] [2024-06-21 18:50:06,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:06,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:06,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:06,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 333 transitions, 5414 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:08,314 INFO L124 PetriNetUnfolderBase]: 4559/7349 cut-off events. [2024-06-21 18:50:08,315 INFO L125 PetriNetUnfolderBase]: For 365472/365476 co-relation queries the response was YES. [2024-06-21 18:50:08,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50925 conditions, 7349 events. 4559/7349 cut-off events. For 365472/365476 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 47843 event pairs, 1251 based on Foata normal form. 24/7371 useless extension candidates. Maximal degree in co-relation 50811. Up to 6315 conditions per place. [2024-06-21 18:50:08,388 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 244 selfloop transitions, 126 changer transitions 0/374 dead transitions. [2024-06-21 18:50:08,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 374 transitions, 6365 flow [2024-06-21 18:50:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:50:08,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 18:50:08,390 INFO L175 Difference]: Start difference. First operand has 228 places, 333 transitions, 5414 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:50:08,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 374 transitions, 6365 flow [2024-06-21 18:50:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 374 transitions, 6148 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:09,028 INFO L231 Difference]: Finished difference. Result has 233 places, 335 transitions, 5544 flow [2024-06-21 18:50:09,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5219, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5544, PETRI_PLACES=233, PETRI_TRANSITIONS=335} [2024-06-21 18:50:09,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-21 18:50:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 335 transitions, 5544 flow [2024-06-21 18:50:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:09,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:09,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:50:09,029 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1090353883, now seen corresponding path program 4 times [2024-06-21 18:50:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405359791] [2024-06-21 18:50:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:09,719 INFO 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 18:50:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405359791] [2024-06-21 18:50:09,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405359791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:09,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:09,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216601364] [2024-06-21 18:50:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:09,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:09,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:09,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 335 transitions, 5544 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:09,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:09,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:09,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:11,299 INFO L124 PetriNetUnfolderBase]: 4593/7400 cut-off events. [2024-06-21 18:50:11,299 INFO L125 PetriNetUnfolderBase]: For 360016/360022 co-relation queries the response was YES. [2024-06-21 18:50:11,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50667 conditions, 7400 events. 4593/7400 cut-off events. For 360016/360022 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 48497 event pairs, 1647 based on Foata normal form. 8/7407 useless extension candidates. Maximal degree in co-relation 50552. Up to 6958 conditions per place. [2024-06-21 18:50:11,380 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 292 selfloop transitions, 76 changer transitions 0/372 dead transitions. [2024-06-21 18:50:11,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 372 transitions, 6593 flow [2024-06-21 18:50:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:50:11,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:50:11,382 INFO L175 Difference]: Start difference. First operand has 233 places, 335 transitions, 5544 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:50:11,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 372 transitions, 6593 flow [2024-06-21 18:50:12,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 372 transitions, 6382 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:12,045 INFO L231 Difference]: Finished difference. Result has 236 places, 349 transitions, 5784 flow [2024-06-21 18:50:12,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5784, PETRI_PLACES=236, PETRI_TRANSITIONS=349} [2024-06-21 18:50:12,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 18:50:12,046 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 349 transitions, 5784 flow [2024-06-21 18:50:12,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:12,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:12,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:50:12,046 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 18:50:12,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1175437483, now seen corresponding path program 11 times [2024-06-21 18:50:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584074359] [2024-06-21 18:50:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584074359] [2024-06-21 18:50:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584074359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:12,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:12,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028226179] [2024-06-21 18:50:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:12,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:12,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:12,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 349 transitions, 5784 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:12,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:12,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:12,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:14,492 INFO L124 PetriNetUnfolderBase]: 4802/7752 cut-off events. [2024-06-21 18:50:14,492 INFO L125 PetriNetUnfolderBase]: For 383197/383199 co-relation queries the response was YES. [2024-06-21 18:50:14,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52206 conditions, 7752 events. 4802/7752 cut-off events. For 383197/383199 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 51093 event pairs, 1252 based on Foata normal form. 18/7768 useless extension candidates. Maximal degree in co-relation 52089. Up to 6175 conditions per place. [2024-06-21 18:50:14,586 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 260 selfloop transitions, 139 changer transitions 0/403 dead transitions. [2024-06-21 18:50:14,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 403 transitions, 7100 flow [2024-06-21 18:50:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:50:14,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 18:50:14,597 INFO L175 Difference]: Start difference. First operand has 236 places, 349 transitions, 5784 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:50:14,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 403 transitions, 7100 flow [2024-06-21 18:50:15,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 403 transitions, 6907 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:15,433 INFO L231 Difference]: Finished difference. Result has 240 places, 358 transitions, 6093 flow [2024-06-21 18:50:15,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6093, PETRI_PLACES=240, PETRI_TRANSITIONS=358} [2024-06-21 18:50:15,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 18:50:15,434 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 358 transitions, 6093 flow [2024-06-21 18:50:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:15,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:15,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:15,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:50:15,434 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 18:50:15,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1169927233, now seen corresponding path program 12 times [2024-06-21 18:50:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580272548] [2024-06-21 18:50:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:15,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:16,293 INFO 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 18:50:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580272548] [2024-06-21 18:50:16,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580272548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:16,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:16,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:16,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894371070] [2024-06-21 18:50:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:16,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:16,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 358 transitions, 6093 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:16,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:16,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:16,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:18,012 INFO L124 PetriNetUnfolderBase]: 4815/7769 cut-off events. [2024-06-21 18:50:18,012 INFO L125 PetriNetUnfolderBase]: For 381558/381558 co-relation queries the response was YES. [2024-06-21 18:50:18,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52256 conditions, 7769 events. 4815/7769 cut-off events. For 381558/381558 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 51142 event pairs, 1251 based on Foata normal form. 20/7787 useless extension candidates. Maximal degree in co-relation 52138. Up to 6719 conditions per place. [2024-06-21 18:50:18,106 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 269 selfloop transitions, 124 changer transitions 0/397 dead transitions. [2024-06-21 18:50:18,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 397 transitions, 7037 flow [2024-06-21 18:50:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 18:50:18,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 18:50:18,108 INFO L175 Difference]: Start difference. First operand has 240 places, 358 transitions, 6093 flow. Second operand 9 states and 167 transitions. [2024-06-21 18:50:18,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 397 transitions, 7037 flow [2024-06-21 18:50:18,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 397 transitions, 6736 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:18,888 INFO L231 Difference]: Finished difference. Result has 243 places, 359 transitions, 6074 flow [2024-06-21 18:50:18,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6074, PETRI_PLACES=243, PETRI_TRANSITIONS=359} [2024-06-21 18:50:18,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 18:50:18,889 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 359 transitions, 6074 flow [2024-06-21 18:50:18,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:18,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:18,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:18,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:50:18,889 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 18:50:18,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1169712031, now seen corresponding path program 4 times [2024-06-21 18:50:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854879644] [2024-06-21 18:50:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:20,153 INFO 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 18:50:20,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:20,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854879644] [2024-06-21 18:50:20,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854879644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:20,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:20,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:20,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118551435] [2024-06-21 18:50:20,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:20,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:20,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:20,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 359 transitions, 6074 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:21,996 INFO L124 PetriNetUnfolderBase]: 4942/7980 cut-off events. [2024-06-21 18:50:21,996 INFO L125 PetriNetUnfolderBase]: For 364853/364853 co-relation queries the response was YES. [2024-06-21 18:50:22,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52394 conditions, 7980 events. 4942/7980 cut-off events. For 364853/364853 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 52906 event pairs, 1242 based on Foata normal form. 12/7990 useless extension candidates. Maximal degree in co-relation 52275. Up to 6244 conditions per place. [2024-06-21 18:50:22,079 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 133 changer transitions 0/404 dead transitions. [2024-06-21 18:50:22,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 404 transitions, 7030 flow [2024-06-21 18:50:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 18:50:22,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 18:50:22,081 INFO L175 Difference]: Start difference. First operand has 243 places, 359 transitions, 6074 flow. Second operand 9 states and 167 transitions. [2024-06-21 18:50:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 404 transitions, 7030 flow [2024-06-21 18:50:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 404 transitions, 6759 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:50:22,889 INFO L231 Difference]: Finished difference. Result has 244 places, 364 transitions, 6127 flow [2024-06-21 18:50:22,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6127, PETRI_PLACES=244, PETRI_TRANSITIONS=364} [2024-06-21 18:50:22,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 18:50:22,890 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 364 transitions, 6127 flow [2024-06-21 18:50:22,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:22,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:22,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:22,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:50:22,894 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:22,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1951551679, now seen corresponding path program 5 times [2024-06-21 18:50:22,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:22,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494102656] [2024-06-21 18:50:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:23,578 INFO 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 18:50:23,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:23,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494102656] [2024-06-21 18:50:23,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494102656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:23,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:23,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:23,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386670295] [2024-06-21 18:50:23,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:23,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:23,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:23,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:23,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:23,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 364 transitions, 6127 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:23,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:23,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:23,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:25,105 INFO L124 PetriNetUnfolderBase]: 4967/8020 cut-off events. [2024-06-21 18:50:25,105 INFO L125 PetriNetUnfolderBase]: For 354698/354702 co-relation queries the response was YES. [2024-06-21 18:50:25,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52960 conditions, 8020 events. 4967/8020 cut-off events. For 354698/354702 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 53678 event pairs, 1690 based on Foata normal form. 6/8025 useless extension candidates. Maximal degree in co-relation 52840. Up to 7560 conditions per place. [2024-06-21 18:50:25,199 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 76 changer transitions 0/396 dead transitions. [2024-06-21 18:50:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 396 transitions, 7128 flow [2024-06-21 18:50:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 18:50:25,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 18:50:25,201 INFO L175 Difference]: Start difference. First operand has 244 places, 364 transitions, 6127 flow. Second operand 8 states and 138 transitions. [2024-06-21 18:50:25,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 396 transitions, 7128 flow [2024-06-21 18:50:25,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 396 transitions, 6801 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:25,979 INFO L231 Difference]: Finished difference. Result has 245 places, 375 transitions, 6138 flow [2024-06-21 18:50:25,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6138, PETRI_PLACES=245, PETRI_TRANSITIONS=375} [2024-06-21 18:50:25,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 18:50:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 375 transitions, 6138 flow [2024-06-21 18:50:25,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:25,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:25,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:25,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:50:25,981 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:25,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1344785269, now seen corresponding path program 6 times [2024-06-21 18:50:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349158268] [2024-06-21 18:50:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:26,754 INFO 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 18:50:26,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349158268] [2024-06-21 18:50:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349158268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:26,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:26,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:26,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21907701] [2024-06-21 18:50:26,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:26,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:26,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:26,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 375 transitions, 6138 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:26,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:26,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:26,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:28,183 INFO L124 PetriNetUnfolderBase]: 4999/8069 cut-off events. [2024-06-21 18:50:28,184 INFO L125 PetriNetUnfolderBase]: For 351714/351716 co-relation queries the response was YES. [2024-06-21 18:50:28,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52783 conditions, 8069 events. 4999/8069 cut-off events. For 351714/351716 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 53978 event pairs, 1701 based on Foata normal form. 4/8072 useless extension candidates. Maximal degree in co-relation 52662. Up to 7532 conditions per place. [2024-06-21 18:50:28,292 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 315 selfloop transitions, 88 changer transitions 0/407 dead transitions. [2024-06-21 18:50:28,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 407 transitions, 7326 flow [2024-06-21 18:50:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:50:28,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:50:28,308 INFO L175 Difference]: Start difference. First operand has 245 places, 375 transitions, 6138 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:50:28,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 407 transitions, 7326 flow [2024-06-21 18:50:29,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 407 transitions, 7130 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:29,172 INFO L231 Difference]: Finished difference. Result has 249 places, 388 transitions, 6400 flow [2024-06-21 18:50:29,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6400, PETRI_PLACES=249, PETRI_TRANSITIONS=388} [2024-06-21 18:50:29,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 18:50:29,174 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 388 transitions, 6400 flow [2024-06-21 18:50:29,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:29,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:29,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:50:29,174 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 18:50:29,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1344784897, now seen corresponding path program 4 times [2024-06-21 18:50:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806565341] [2024-06-21 18:50:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:30,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806565341] [2024-06-21 18:50:30,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806565341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:30,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554666761] [2024-06-21 18:50:30,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:30,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:30,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:30,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:30,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:30,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:30,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 388 transitions, 6400 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:30,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:30,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:30,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:31,702 INFO L124 PetriNetUnfolderBase]: 5001/8081 cut-off events. [2024-06-21 18:50:31,702 INFO L125 PetriNetUnfolderBase]: For 360264/360266 co-relation queries the response was YES. [2024-06-21 18:50:31,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53246 conditions, 8081 events. 5001/8081 cut-off events. For 360264/360266 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 54163 event pairs, 2103 based on Foata normal form. 3/8083 useless extension candidates. Maximal degree in co-relation 53123. Up to 7780 conditions per place. [2024-06-21 18:50:31,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 30 changer transitions 0/410 dead transitions. [2024-06-21 18:50:31,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 410 transitions, 7302 flow [2024-06-21 18:50:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 18:50:31,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 18:50:31,784 INFO L175 Difference]: Start difference. First operand has 249 places, 388 transitions, 6400 flow. Second operand 8 states and 127 transitions. [2024-06-21 18:50:31,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 410 transitions, 7302 flow [2024-06-21 18:50:32,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 410 transitions, 7016 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:32,533 INFO L231 Difference]: Finished difference. Result has 251 places, 392 transitions, 6222 flow [2024-06-21 18:50:32,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6222, PETRI_PLACES=251, PETRI_TRANSITIONS=392} [2024-06-21 18:50:32,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-21 18:50:32,534 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 392 transitions, 6222 flow [2024-06-21 18:50:32,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:32,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:32,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:32,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:50:32,534 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 18:50:32,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1681771293, now seen corresponding path program 1 times [2024-06-21 18:50:32,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940007318] [2024-06-21 18:50:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:33,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:33,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940007318] [2024-06-21 18:50:33,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940007318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:33,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:33,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575855267] [2024-06-21 18:50:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:33,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:33,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:33,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:50:33,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 392 transitions, 6222 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:50:33,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:33,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:50:33,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:34,802 INFO L124 PetriNetUnfolderBase]: 4902/7985 cut-off events. [2024-06-21 18:50:34,802 INFO L125 PetriNetUnfolderBase]: For 370253/370253 co-relation queries the response was YES. [2024-06-21 18:50:34,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52549 conditions, 7985 events. 4902/7985 cut-off events. For 370253/370253 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 53876 event pairs, 2268 based on Foata normal form. 1/7985 useless extension candidates. Maximal degree in co-relation 52425. Up to 7591 conditions per place. [2024-06-21 18:50:34,891 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 19 changer transitions 0/413 dead transitions. [2024-06-21 18:50:34,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 413 transitions, 7143 flow [2024-06-21 18:50:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 18:50:34,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:50:34,893 INFO L175 Difference]: Start difference. First operand has 251 places, 392 transitions, 6222 flow. Second operand 8 states and 128 transitions. [2024-06-21 18:50:34,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 413 transitions, 7143 flow [2024-06-21 18:50:35,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 413 transitions, 7083 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:35,582 INFO L231 Difference]: Finished difference. Result has 253 places, 398 transitions, 6273 flow [2024-06-21 18:50:35,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6273, PETRI_PLACES=253, PETRI_TRANSITIONS=398} [2024-06-21 18:50:35,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 18:50:35,583 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 398 transitions, 6273 flow [2024-06-21 18:50:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:50:35,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:35,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:35,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:50:35,584 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 18:50:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2012066883, now seen corresponding path program 1 times [2024-06-21 18:50:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:35,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973471662] [2024-06-21 18:50:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:36,720 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 18:50:36,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973471662] [2024-06-21 18:50:36,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973471662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:36,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837805951] [2024-06-21 18:50:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:36,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:36,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 398 transitions, 6273 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:36,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:36,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:36,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:38,353 INFO L124 PetriNetUnfolderBase]: 5011/8096 cut-off events. [2024-06-21 18:50:38,353 INFO L125 PetriNetUnfolderBase]: For 379371/379371 co-relation queries the response was YES. [2024-06-21 18:50:38,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53958 conditions, 8096 events. 5011/8096 cut-off events. For 379371/379371 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 54115 event pairs, 2301 based on Foata normal form. 1/8096 useless extension candidates. Maximal degree in co-relation 53833. Up to 7813 conditions per place. [2024-06-21 18:50:38,451 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 393 selfloop transitions, 16 changer transitions 0/413 dead transitions. [2024-06-21 18:50:38,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 413 transitions, 7179 flow [2024-06-21 18:50:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 18:50:38,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-21 18:50:38,452 INFO L175 Difference]: Start difference. First operand has 253 places, 398 transitions, 6273 flow. Second operand 8 states and 117 transitions. [2024-06-21 18:50:38,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 413 transitions, 7179 flow [2024-06-21 18:50:39,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 413 transitions, 7140 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:39,308 INFO L231 Difference]: Finished difference. Result has 258 places, 401 transitions, 6324 flow [2024-06-21 18:50:39,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6324, PETRI_PLACES=258, PETRI_TRANSITIONS=401} [2024-06-21 18:50:39,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 18:50:39,309 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 401 transitions, 6324 flow [2024-06-21 18:50:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:39,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:39,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:39,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:50:39,310 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 18:50:39,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1064485405, now seen corresponding path program 2 times [2024-06-21 18:50:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:39,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483667611] [2024-06-21 18:50:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:40,116 INFO 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 18:50:40,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:40,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483667611] [2024-06-21 18:50:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483667611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:40,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:40,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138294092] [2024-06-21 18:50:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:40,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:40,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:50:40,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 401 transitions, 6324 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:50:40,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:40,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:50:40,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:41,713 INFO L124 PetriNetUnfolderBase]: 4940/8030 cut-off events. [2024-06-21 18:50:41,713 INFO L125 PetriNetUnfolderBase]: For 393765/393765 co-relation queries the response was YES. [2024-06-21 18:50:41,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54261 conditions, 8030 events. 4940/8030 cut-off events. For 393765/393765 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 54053 event pairs, 2267 based on Foata normal form. 1/8030 useless extension candidates. Maximal degree in co-relation 54134. Up to 7620 conditions per place. [2024-06-21 18:50:41,808 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 25 changer transitions 0/420 dead transitions. [2024-06-21 18:50:41,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 420 transitions, 7394 flow [2024-06-21 18:50:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 18:50:41,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 18:50:41,810 INFO L175 Difference]: Start difference. First operand has 258 places, 401 transitions, 6324 flow. Second operand 8 states and 129 transitions. [2024-06-21 18:50:41,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 420 transitions, 7394 flow [2024-06-21 18:50:42,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 420 transitions, 7326 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:42,867 INFO L231 Difference]: Finished difference. Result has 261 places, 407 transitions, 6422 flow [2024-06-21 18:50:42,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6422, PETRI_PLACES=261, PETRI_TRANSITIONS=407} [2024-06-21 18:50:42,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 18:50:42,868 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 407 transitions, 6422 flow [2024-06-21 18:50:42,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:50:42,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:42,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:42,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:50:42,868 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 18:50:42,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1071151831, now seen corresponding path program 2 times [2024-06-21 18:50:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:42,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276040319] [2024-06-21 18:50:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:44,264 INFO 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 18:50:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276040319] [2024-06-21 18:50:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276040319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:44,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:44,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509957847] [2024-06-21 18:50:44,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:44,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:50:44,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 407 transitions, 6422 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:44,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:44,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:50:44,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:45,951 INFO L124 PetriNetUnfolderBase]: 4954/8051 cut-off events. [2024-06-21 18:50:45,952 INFO L125 PetriNetUnfolderBase]: For 411928/411932 co-relation queries the response was YES. [2024-06-21 18:50:46,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55640 conditions, 8051 events. 4954/8051 cut-off events. For 411928/411932 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 54224 event pairs, 2270 based on Foata normal form. 7/8057 useless extension candidates. Maximal degree in co-relation 55511. Up to 7635 conditions per place. [2024-06-21 18:50:46,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 30 changer transitions 0/425 dead transitions. [2024-06-21 18:50:46,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 425 transitions, 7504 flow [2024-06-21 18:50:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 18:50:46,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 18:50:46,033 INFO L175 Difference]: Start difference. First operand has 261 places, 407 transitions, 6422 flow. Second operand 8 states and 127 transitions. [2024-06-21 18:50:46,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 425 transitions, 7504 flow [2024-06-21 18:50:46,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 425 transitions, 7430 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:46,816 INFO L231 Difference]: Finished difference. Result has 264 places, 413 transitions, 6521 flow [2024-06-21 18:50:46,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6521, PETRI_PLACES=264, PETRI_TRANSITIONS=413} [2024-06-21 18:50:46,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-21 18:50:46,816 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 413 transitions, 6521 flow [2024-06-21 18:50:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:46,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:46,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:46,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:50:46,817 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 18:50:46,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1504519617, now seen corresponding path program 3 times [2024-06-21 18:50:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:46,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502565346] [2024-06-21 18:50:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:46,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:47,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:47,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502565346] [2024-06-21 18:50:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502565346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:47,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:47,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:47,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031493248] [2024-06-21 18:50:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:47,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:47,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:50:47,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 413 transitions, 6521 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:47,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:47,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:50:47,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:49,525 INFO L124 PetriNetUnfolderBase]: 4961/8061 cut-off events. [2024-06-21 18:50:49,526 INFO L125 PetriNetUnfolderBase]: For 421716/421720 co-relation queries the response was YES. [2024-06-21 18:50:49,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56018 conditions, 8061 events. 4961/8061 cut-off events. For 421716/421720 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 54296 event pairs, 2274 based on Foata normal form. 7/8067 useless extension candidates. Maximal degree in co-relation 55888. Up to 7669 conditions per place. [2024-06-21 18:50:49,628 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 393 selfloop transitions, 21 changer transitions 0/426 dead transitions. [2024-06-21 18:50:49,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 426 transitions, 7433 flow [2024-06-21 18:50:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 18:50:49,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-21 18:50:49,630 INFO L175 Difference]: Start difference. First operand has 264 places, 413 transitions, 6521 flow. Second operand 8 states and 124 transitions. [2024-06-21 18:50:49,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 426 transitions, 7433 flow [2024-06-21 18:50:50,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 426 transitions, 7362 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:50,663 INFO L231 Difference]: Finished difference. Result has 268 places, 416 transitions, 6558 flow [2024-06-21 18:50:50,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6558, PETRI_PLACES=268, PETRI_TRANSITIONS=416} [2024-06-21 18:50:50,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 18:50:50,664 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 416 transitions, 6558 flow [2024-06-21 18:50:50,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:50,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:50,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:50,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:50:50,665 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 18:50:50,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1504519803, now seen corresponding path program 3 times [2024-06-21 18:50:50,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:50,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414966142] [2024-06-21 18:50:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:50,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:51,485 INFO 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 18:50:51,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:51,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414966142] [2024-06-21 18:50:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414966142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:51,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852834991] [2024-06-21 18:50:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:51,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:51,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:50:51,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 416 transitions, 6558 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:50:51,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:51,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:50:51,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:53,023 INFO L124 PetriNetUnfolderBase]: 4935/8035 cut-off events. [2024-06-21 18:50:53,024 INFO L125 PetriNetUnfolderBase]: For 427782/427784 co-relation queries the response was YES. [2024-06-21 18:50:53,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55957 conditions, 8035 events. 4935/8035 cut-off events. For 427782/427784 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 54314 event pairs, 2263 based on Foata normal form. 1/8035 useless extension candidates. Maximal degree in co-relation 55825. Up to 7609 conditions per place. [2024-06-21 18:50:53,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 34 changer transitions 0/433 dead transitions. [2024-06-21 18:50:53,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 433 transitions, 7786 flow [2024-06-21 18:50:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 18:50:53,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 18:50:53,125 INFO L175 Difference]: Start difference. First operand has 268 places, 416 transitions, 6558 flow. Second operand 8 states and 130 transitions. [2024-06-21 18:50:53,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 433 transitions, 7786 flow [2024-06-21 18:50:53,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 433 transitions, 7716 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:53,970 INFO L231 Difference]: Finished difference. Result has 271 places, 422 transitions, 6680 flow [2024-06-21 18:50:53,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6680, PETRI_PLACES=271, PETRI_TRANSITIONS=422} [2024-06-21 18:50:53,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 18:50:53,971 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 422 transitions, 6680 flow [2024-06-21 18:50:53,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:50:53,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:53,971 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 18:50:53,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:50:53,972 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:53,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1097467286, now seen corresponding path program 1 times [2024-06-21 18:50:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:53,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582764355] [2024-06-21 18:50:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:54,738 INFO 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 18:50:54,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:54,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582764355] [2024-06-21 18:50:54,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582764355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:54,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:54,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:54,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661023295] [2024-06-21 18:50:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:54,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:54,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:54,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:54,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 422 transitions, 6680 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:54,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:54,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:54,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:56,420 INFO L124 PetriNetUnfolderBase]: 5063/8164 cut-off events. [2024-06-21 18:50:56,421 INFO L125 PetriNetUnfolderBase]: For 442847/442851 co-relation queries the response was YES. [2024-06-21 18:50:56,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57825 conditions, 8164 events. 5063/8164 cut-off events. For 442847/442851 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 54501 event pairs, 1754 based on Foata normal form. 8/8171 useless extension candidates. Maximal degree in co-relation 57691. Up to 7697 conditions per place. [2024-06-21 18:50:56,532 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 66 changer transitions 0/444 dead transitions. [2024-06-21 18:50:56,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 444 transitions, 7750 flow [2024-06-21 18:50:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 18:50:56,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 18:50:56,536 INFO L175 Difference]: Start difference. First operand has 271 places, 422 transitions, 6680 flow. Second operand 7 states and 122 transitions. [2024-06-21 18:50:56,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 444 transitions, 7750 flow [2024-06-21 18:50:57,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 444 transitions, 7644 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:57,365 INFO L231 Difference]: Finished difference. Result has 273 places, 430 transitions, 6881 flow [2024-06-21 18:50:57,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6881, PETRI_PLACES=273, PETRI_TRANSITIONS=430} [2024-06-21 18:50:57,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-21 18:50:57,367 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 430 transitions, 6881 flow [2024-06-21 18:50:57,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:57,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:57,367 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 18:50:57,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:50:57,367 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:57,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1793413838, now seen corresponding path program 2 times [2024-06-21 18:50:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:57,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888408838] [2024-06-21 18:50:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:58,219 INFO 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 18:50:58,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:58,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888408838] [2024-06-21 18:50:58,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888408838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:58,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:58,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332593370] [2024-06-21 18:50:58,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:58,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:58,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:58,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:58,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 430 transitions, 6881 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:58,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:58,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:58,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:59,952 INFO L124 PetriNetUnfolderBase]: 5067/8166 cut-off events. [2024-06-21 18:50:59,952 INFO L125 PetriNetUnfolderBase]: For 450938/450942 co-relation queries the response was YES. [2024-06-21 18:51:00,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58015 conditions, 8166 events. 5067/8166 cut-off events. For 450938/450942 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 54423 event pairs, 1678 based on Foata normal form. 8/8173 useless extension candidates. Maximal degree in co-relation 57880. Up to 7631 conditions per place. [2024-06-21 18:51:00,065 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 92 changer transitions 0/449 dead transitions. [2024-06-21 18:51:00,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 449 transitions, 8079 flow [2024-06-21 18:51:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 18:51:00,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 18:51:00,067 INFO L175 Difference]: Start difference. First operand has 273 places, 430 transitions, 6881 flow. Second operand 8 states and 129 transitions. [2024-06-21 18:51:00,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 449 transitions, 8079 flow [2024-06-21 18:51:00,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 449 transitions, 7878 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:00,997 INFO L231 Difference]: Finished difference. Result has 276 places, 436 transitions, 7023 flow [2024-06-21 18:51:00,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6680, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7023, PETRI_PLACES=276, PETRI_TRANSITIONS=436} [2024-06-21 18:51:00,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 18:51:00,998 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 436 transitions, 7023 flow [2024-06-21 18:51:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:00,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:00,998 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 18:51:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:51:00,998 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:00,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1802671895, now seen corresponding path program 1 times [2024-06-21 18:51:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124468982] [2024-06-21 18:51:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:01,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124468982] [2024-06-21 18:51:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124468982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:01,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132750547] [2024-06-21 18:51:01,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:02,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 436 transitions, 7023 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:02,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:02,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:02,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:03,645 INFO L124 PetriNetUnfolderBase]: 5077/8182 cut-off events. [2024-06-21 18:51:03,646 INFO L125 PetriNetUnfolderBase]: For 459266/459270 co-relation queries the response was YES. [2024-06-21 18:51:03,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58289 conditions, 8182 events. 5077/8182 cut-off events. For 459266/459270 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 54567 event pairs, 1702 based on Foata normal form. 6/8187 useless extension candidates. Maximal degree in co-relation 58153. Up to 7701 conditions per place. [2024-06-21 18:51:03,750 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 376 selfloop transitions, 76 changer transitions 0/456 dead transitions. [2024-06-21 18:51:03,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 456 transitions, 8053 flow [2024-06-21 18:51:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 18:51:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:51:03,752 INFO L175 Difference]: Start difference. First operand has 276 places, 436 transitions, 7023 flow. Second operand 9 states and 144 transitions. [2024-06-21 18:51:03,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 456 transitions, 8053 flow [2024-06-21 18:51:05,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 456 transitions, 7834 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:05,058 INFO L231 Difference]: Finished difference. Result has 280 places, 440 transitions, 7049 flow [2024-06-21 18:51:05,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7049, PETRI_PLACES=280, PETRI_TRANSITIONS=440} [2024-06-21 18:51:05,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 18:51:05,059 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 440 transitions, 7049 flow [2024-06-21 18:51:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:05,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:05,060 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 18:51:05,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:51:05,060 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:05,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:05,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1103177579, now seen corresponding path program 2 times [2024-06-21 18:51:05,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:05,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590330832] [2024-06-21 18:51:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:05,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:06,117 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 18:51:06,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590330832] [2024-06-21 18:51:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590330832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:06,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:06,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415163308] [2024-06-21 18:51:06,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:06,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:06,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:06,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:06,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 440 transitions, 7049 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:06,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:06,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:06,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:07,903 INFO L124 PetriNetUnfolderBase]: 5089/8199 cut-off events. [2024-06-21 18:51:07,903 INFO L125 PetriNetUnfolderBase]: For 471762/471766 co-relation queries the response was YES. [2024-06-21 18:51:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59041 conditions, 8199 events. 5089/8199 cut-off events. For 471762/471766 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 54645 event pairs, 1677 based on Foata normal form. 6/8204 useless extension candidates. Maximal degree in co-relation 58904. Up to 7650 conditions per place. [2024-06-21 18:51:08,002 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 357 selfloop transitions, 97 changer transitions 0/458 dead transitions. [2024-06-21 18:51:08,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 458 transitions, 8217 flow [2024-06-21 18:51:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 18:51:08,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-21 18:51:08,003 INFO L175 Difference]: Start difference. First operand has 280 places, 440 transitions, 7049 flow. Second operand 9 states and 142 transitions. [2024-06-21 18:51:08,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 458 transitions, 8217 flow [2024-06-21 18:51:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 458 transitions, 7863 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 18:51:09,188 INFO L231 Difference]: Finished difference. Result has 279 places, 444 transitions, 6989 flow [2024-06-21 18:51:09,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6695, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6989, PETRI_PLACES=279, PETRI_TRANSITIONS=444} [2024-06-21 18:51:09,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 18:51:09,189 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 444 transitions, 6989 flow [2024-06-21 18:51:09,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:09,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:09,189 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 18:51:09,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:51:09,191 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:09,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1537999590, now seen corresponding path program 1 times [2024-06-21 18:51:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:09,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522767720] [2024-06-21 18:51:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:10,664 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 18:51:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522767720] [2024-06-21 18:51:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522767720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:51:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805315717] [2024-06-21 18:51:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:10,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:51:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:51:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:51:10,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:51:10,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 444 transitions, 6989 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 18:51:10,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:10,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:51:10,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:12,587 INFO L124 PetriNetUnfolderBase]: 5099/8220 cut-off events. [2024-06-21 18:51:12,587 INFO L125 PetriNetUnfolderBase]: For 483148/483150 co-relation queries the response was YES. [2024-06-21 18:51:12,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59728 conditions, 8220 events. 5099/8220 cut-off events. For 483148/483150 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 54883 event pairs, 2078 based on Foata normal form. 4/8223 useless extension candidates. Maximal degree in co-relation 59591. Up to 7902 conditions per place. [2024-06-21 18:51:12,685 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 37 changer transitions 0/463 dead transitions. [2024-06-21 18:51:12,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 463 transitions, 8029 flow [2024-06-21 18:51:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:51:12,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:51:12,687 INFO L175 Difference]: Start difference. First operand has 279 places, 444 transitions, 6989 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:51:12,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 463 transitions, 8029 flow [2024-06-21 18:51:13,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 463 transitions, 7765 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:13,768 INFO L231 Difference]: Finished difference. Result has 280 places, 447 transitions, 6883 flow [2024-06-21 18:51:13,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6883, PETRI_PLACES=280, PETRI_TRANSITIONS=447} [2024-06-21 18:51:13,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 18:51:13,769 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 447 transitions, 6883 flow [2024-06-21 18:51:13,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 18:51:13,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:13,769 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 18:51:13,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:51:13,769 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:13,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:13,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1103188739, now seen corresponding path program 3 times [2024-06-21 18:51:13,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:13,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263403202] [2024-06-21 18:51:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:13,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263403202] [2024-06-21 18:51:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263403202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:15,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959159167] [2024-06-21 18:51:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:15,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:15,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:15,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 447 transitions, 6883 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:15,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:15,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:15,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:17,240 INFO L124 PetriNetUnfolderBase]: 5127/8259 cut-off events. [2024-06-21 18:51:17,240 INFO L125 PetriNetUnfolderBase]: For 497434/497438 co-relation queries the response was YES. [2024-06-21 18:51:17,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60315 conditions, 8259 events. 5127/8259 cut-off events. For 497434/497438 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 55096 event pairs, 1675 based on Foata normal form. 6/8264 useless extension candidates. Maximal degree in co-relation 60177. Up to 7638 conditions per place. [2024-06-21 18:51:17,341 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 101 changer transitions 0/470 dead transitions. [2024-06-21 18:51:17,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 470 transitions, 8311 flow [2024-06-21 18:51:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 18:51:17,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:51:17,343 INFO L175 Difference]: Start difference. First operand has 280 places, 447 transitions, 6883 flow. Second operand 9 states and 144 transitions. [2024-06-21 18:51:17,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 470 transitions, 8311 flow [2024-06-21 18:51:18,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 470 transitions, 8179 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:18,668 INFO L231 Difference]: Finished difference. Result has 284 places, 455 transitions, 7176 flow [2024-06-21 18:51:18,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6751, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7176, PETRI_PLACES=284, PETRI_TRANSITIONS=455} [2024-06-21 18:51:18,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 18:51:18,669 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 455 transitions, 7176 flow [2024-06-21 18:51:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:18,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:18,669 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 18:51:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:51:18,669 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:18,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2070544180, now seen corresponding path program 3 times [2024-06-21 18:51:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:18,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634734761] [2024-06-21 18:51:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:19,345 INFO 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 18:51:19,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634734761] [2024-06-21 18:51:19,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634734761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:19,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:19,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773760822] [2024-06-21 18:51:19,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:19,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:19,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:19,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 455 transitions, 7176 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:19,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:19,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:19,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:21,404 INFO L124 PetriNetUnfolderBase]: 5115/8238 cut-off events. [2024-06-21 18:51:21,404 INFO L125 PetriNetUnfolderBase]: For 511301/511301 co-relation queries the response was YES. [2024-06-21 18:51:21,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61097 conditions, 8238 events. 5115/8238 cut-off events. For 511301/511301 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 54808 event pairs, 1678 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 60957. Up to 7780 conditions per place. [2024-06-21 18:51:21,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 72 changer transitions 0/469 dead transitions. [2024-06-21 18:51:21,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 469 transitions, 8154 flow [2024-06-21 18:51:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 18:51:21,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 18:51:21,516 INFO L175 Difference]: Start difference. First operand has 284 places, 455 transitions, 7176 flow. Second operand 8 states and 127 transitions. [2024-06-21 18:51:21,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 469 transitions, 8154 flow [2024-06-21 18:51:22,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 469 transitions, 7895 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:22,680 INFO L231 Difference]: Finished difference. Result has 287 places, 455 transitions, 7071 flow [2024-06-21 18:51:22,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6917, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7071, PETRI_PLACES=287, PETRI_TRANSITIONS=455} [2024-06-21 18:51:22,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 18:51:22,681 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 455 transitions, 7071 flow [2024-06-21 18:51:22,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:22,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:22,681 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 18:51:22,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:51:22,681 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:22,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:22,682 INFO L85 PathProgramCache]: Analyzing trace with hash 356456968, now seen corresponding path program 4 times [2024-06-21 18:51:22,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:22,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524286514] [2024-06-21 18:51:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:22,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:23,436 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 18:51:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524286514] [2024-06-21 18:51:23,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524286514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:23,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:23,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705229341] [2024-06-21 18:51:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:23,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:23,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:23,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 455 transitions, 7071 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:25,258 INFO L124 PetriNetUnfolderBase]: 5136/8265 cut-off events. [2024-06-21 18:51:25,258 INFO L125 PetriNetUnfolderBase]: For 524862/524862 co-relation queries the response was YES. [2024-06-21 18:51:25,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61737 conditions, 8265 events. 5136/8265 cut-off events. For 524862/524862 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 54961 event pairs, 1672 based on Foata normal form. 1/8264 useless extension candidates. Maximal degree in co-relation 61595. Up to 7775 conditions per place. [2024-06-21 18:51:25,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 382 selfloop transitions, 89 changer transitions 0/475 dead transitions. [2024-06-21 18:51:25,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 475 transitions, 8342 flow [2024-06-21 18:51:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 18:51:25,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 18:51:25,363 INFO L175 Difference]: Start difference. First operand has 287 places, 455 transitions, 7071 flow. Second operand 8 states and 127 transitions. [2024-06-21 18:51:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 475 transitions, 8342 flow [2024-06-21 18:51:26,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 475 transitions, 7913 flow, removed 20 selfloop flow, removed 14 redundant places. [2024-06-21 18:51:26,622 INFO L231 Difference]: Finished difference. Result has 282 places, 462 transitions, 7012 flow [2024-06-21 18:51:26,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7012, PETRI_PLACES=282, PETRI_TRANSITIONS=462} [2024-06-21 18:51:26,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 18:51:26,622 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 462 transitions, 7012 flow [2024-06-21 18:51:26,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:26,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:26,623 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 18:51:26,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:51:26,623 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:26,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1167109576, now seen corresponding path program 5 times [2024-06-21 18:51:26,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:26,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923620011] [2024-06-21 18:51:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923620011] [2024-06-21 18:51:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923620011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:27,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:27,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:27,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674717576] [2024-06-21 18:51:27,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:27,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:27,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:27,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:27,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 462 transitions, 7012 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:27,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:27,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:27,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:29,502 INFO L124 PetriNetUnfolderBase]: 5138/8275 cut-off events. [2024-06-21 18:51:29,502 INFO L125 PetriNetUnfolderBase]: For 535380/535384 co-relation queries the response was YES. [2024-06-21 18:51:29,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61776 conditions, 8275 events. 5138/8275 cut-off events. For 535380/535384 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 55102 event pairs, 1697 based on Foata normal form. 6/8280 useless extension candidates. Maximal degree in co-relation 61633. Up to 7644 conditions per place. [2024-06-21 18:51:29,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 351 selfloop transitions, 121 changer transitions 0/476 dead transitions. [2024-06-21 18:51:29,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 476 transitions, 8340 flow [2024-06-21 18:51:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 18:51:29,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:51:29,610 INFO L175 Difference]: Start difference. First operand has 282 places, 462 transitions, 7012 flow. Second operand 7 states and 119 transitions. [2024-06-21 18:51:29,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 476 transitions, 8340 flow [2024-06-21 18:51:30,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 476 transitions, 8147 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:30,983 INFO L231 Difference]: Finished difference. Result has 284 places, 465 transitions, 7135 flow [2024-06-21 18:51:30,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6819, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7135, PETRI_PLACES=284, PETRI_TRANSITIONS=465} [2024-06-21 18:51:30,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 18:51:30,983 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 465 transitions, 7135 flow [2024-06-21 18:51:30,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:30,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:30,984 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 18:51:30,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:51:30,984 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:30,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -447699564, now seen corresponding path program 6 times [2024-06-21 18:51:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279629426] [2024-06-21 18:51:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:31,932 INFO 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 18:51:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279629426] [2024-06-21 18:51:31,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279629426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:31,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:31,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59251920] [2024-06-21 18:51:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:31,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:32,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:32,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 465 transitions, 7135 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:32,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:32,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:32,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:33,670 INFO L124 PetriNetUnfolderBase]: 5133/8267 cut-off events. [2024-06-21 18:51:33,670 INFO L125 PetriNetUnfolderBase]: For 542718/542722 co-relation queries the response was YES. [2024-06-21 18:51:33,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61905 conditions, 8267 events. 5133/8267 cut-off events. For 542718/542722 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 55090 event pairs, 1697 based on Foata normal form. 5/8271 useless extension candidates. Maximal degree in co-relation 61761. Up to 7639 conditions per place. [2024-06-21 18:51:33,769 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 136 changer transitions 0/476 dead transitions. [2024-06-21 18:51:33,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 476 transitions, 8403 flow [2024-06-21 18:51:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 18:51:33,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 18:51:33,770 INFO L175 Difference]: Start difference. First operand has 284 places, 465 transitions, 7135 flow. Second operand 7 states and 118 transitions. [2024-06-21 18:51:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 476 transitions, 8403 flow [2024-06-21 18:51:35,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 476 transitions, 8095 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:35,084 INFO L231 Difference]: Finished difference. Result has 287 places, 465 transitions, 7105 flow [2024-06-21 18:51:35,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7105, PETRI_PLACES=287, PETRI_TRANSITIONS=465} [2024-06-21 18:51:35,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 18:51:35,085 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 465 transitions, 7105 flow [2024-06-21 18:51:35,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:35,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:35,085 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 18:51:35,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:51:35,086 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 18:51:35,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1167102043, now seen corresponding path program 4 times [2024-06-21 18:51:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:35,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312841550] [2024-06-21 18:51:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:36,485 INFO 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 18:51:36,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:36,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312841550] [2024-06-21 18:51:36,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312841550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:36,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:36,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174380161] [2024-06-21 18:51:36,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:36,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:36,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:36,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 465 transitions, 7105 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:36,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:36,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:38,234 INFO L124 PetriNetUnfolderBase]: 5169/8322 cut-off events. [2024-06-21 18:51:38,234 INFO L125 PetriNetUnfolderBase]: For 567251/567255 co-relation queries the response was YES. [2024-06-21 18:51:38,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62770 conditions, 8322 events. 5169/8322 cut-off events. For 567251/567255 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 55460 event pairs, 1697 based on Foata normal form. 6/8327 useless extension candidates. Maximal degree in co-relation 62625. Up to 7654 conditions per place. [2024-06-21 18:51:38,346 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 354 selfloop transitions, 128 changer transitions 0/486 dead transitions. [2024-06-21 18:51:38,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 486 transitions, 8633 flow [2024-06-21 18:51:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 18:51:38,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 18:51:38,347 INFO L175 Difference]: Start difference. First operand has 287 places, 465 transitions, 7105 flow. Second operand 9 states and 141 transitions. [2024-06-21 18:51:38,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 486 transitions, 8633 flow [2024-06-21 18:51:39,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 486 transitions, 8312 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:39,778 INFO L231 Difference]: Finished difference. Result has 290 places, 473 transitions, 7262 flow [2024-06-21 18:51:39,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6784, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7262, PETRI_PLACES=290, PETRI_TRANSITIONS=473} [2024-06-21 18:51:39,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 18:51:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 473 transitions, 7262 flow [2024-06-21 18:51:39,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:39,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:39,780 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 18:51:39,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:51:39,780 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 18:51:39,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash -300857166, now seen corresponding path program 2 times [2024-06-21 18:51:39,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:39,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537530535] [2024-06-21 18:51:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:39,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:41,280 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 18:51:41,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537530535] [2024-06-21 18:51:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537530535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:41,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:41,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:51:41,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871831849] [2024-06-21 18:51:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:51:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:51:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:51:41,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:51:41,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 473 transitions, 7262 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 18:51:41,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:41,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:51:41,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:43,122 INFO L124 PetriNetUnfolderBase]: 5179/8337 cut-off events. [2024-06-21 18:51:43,122 INFO L125 PetriNetUnfolderBase]: For 587830/587834 co-relation queries the response was YES. [2024-06-21 18:51:43,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63755 conditions, 8337 events. 5179/8337 cut-off events. For 587830/587834 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 55635 event pairs, 1954 based on Foata normal form. 6/8342 useless extension candidates. Maximal degree in co-relation 63609. Up to 8017 conditions per place. [2024-06-21 18:51:43,241 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 448 selfloop transitions, 35 changer transitions 0/487 dead transitions. [2024-06-21 18:51:43,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 487 transitions, 8344 flow [2024-06-21 18:51:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 18:51:43,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:51:43,243 INFO L175 Difference]: Start difference. First operand has 290 places, 473 transitions, 7262 flow. Second operand 8 states and 128 transitions. [2024-06-21 18:51:43,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 487 transitions, 8344 flow [2024-06-21 18:51:44,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 487 transitions, 8079 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:44,725 INFO L231 Difference]: Finished difference. Result has 293 places, 476 transitions, 7163 flow [2024-06-21 18:51:44,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6997, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7163, PETRI_PLACES=293, PETRI_TRANSITIONS=476} [2024-06-21 18:51:44,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 18:51:44,725 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 476 transitions, 7163 flow [2024-06-21 18:51:44,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 18:51:44,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:44,726 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 18:51:44,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:51:44,726 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 18:51:44,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1167113203, now seen corresponding path program 5 times [2024-06-21 18:51:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251808088] [2024-06-21 18:51:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:46,235 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 18:51:46,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:46,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251808088] [2024-06-21 18:51:46,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251808088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:46,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:46,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876016778] [2024-06-21 18:51:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:46,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:46,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:46,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 476 transitions, 7163 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:46,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:46,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:46,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:48,237 INFO L124 PetriNetUnfolderBase]: 5181/8339 cut-off events. [2024-06-21 18:51:48,237 INFO L125 PetriNetUnfolderBase]: For 594142/594146 co-relation queries the response was YES. [2024-06-21 18:51:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63948 conditions, 8339 events. 5181/8339 cut-off events. For 594142/594146 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 55539 event pairs, 1699 based on Foata normal form. 6/8344 useless extension candidates. Maximal degree in co-relation 63800. Up to 7700 conditions per place. [2024-06-21 18:51:48,333 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 360 selfloop transitions, 127 changer transitions 0/491 dead transitions. [2024-06-21 18:51:48,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 491 transitions, 8418 flow [2024-06-21 18:51:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 18:51:48,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-21 18:51:48,334 INFO L175 Difference]: Start difference. First operand has 293 places, 476 transitions, 7163 flow. Second operand 9 states and 139 transitions. [2024-06-21 18:51:48,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 491 transitions, 8418 flow [2024-06-21 18:51:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 491 transitions, 8274 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:49,677 INFO L231 Difference]: Finished difference. Result has 296 places, 480 transitions, 7385 flow [2024-06-21 18:51:49,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7385, PETRI_PLACES=296, PETRI_TRANSITIONS=480} [2024-06-21 18:51:49,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 18:51:49,678 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 480 transitions, 7385 flow [2024-06-21 18:51:49,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:49,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:49,678 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 18:51:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:51:49,679 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 18:51:49,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1153769160, now seen corresponding path program 3 times [2024-06-21 18:51:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262899708] [2024-06-21 18:51:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:51,077 INFO 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 18:51:51,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262899708] [2024-06-21 18:51:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262899708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:51,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995153951] [2024-06-21 18:51:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:51,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:51,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 480 transitions, 7385 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:51,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:51,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:51,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:52,951 INFO L124 PetriNetUnfolderBase]: 5191/8359 cut-off events. [2024-06-21 18:51:52,951 INFO L125 PetriNetUnfolderBase]: For 613317/613317 co-relation queries the response was YES. [2024-06-21 18:51:53,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64618 conditions, 8359 events. 5191/8359 cut-off events. For 613317/613317 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 55864 event pairs, 2303 based on Foata normal form. 2/8360 useless extension candidates. Maximal degree in co-relation 64469. Up to 8060 conditions per place. [2024-06-21 18:51:53,062 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 472 selfloop transitions, 19 changer transitions 0/495 dead transitions. [2024-06-21 18:51:53,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 495 transitions, 8493 flow [2024-06-21 18:51:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 18:51:53,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 18:51:53,063 INFO L175 Difference]: Start difference. First operand has 296 places, 480 transitions, 7385 flow. Second operand 8 states and 120 transitions. [2024-06-21 18:51:53,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 495 transitions, 8493 flow [2024-06-21 18:51:54,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 495 transitions, 8164 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:54,381 INFO L231 Difference]: Finished difference. Result has 297 places, 483 transitions, 7198 flow [2024-06-21 18:51:54,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7056, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7198, PETRI_PLACES=297, PETRI_TRANSITIONS=483} [2024-06-21 18:51:54,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 18:51:54,382 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 483 transitions, 7198 flow [2024-06-21 18:51:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:54,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:54,382 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 18:51:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:51:54,383 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 18:51:54,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash 611700353, now seen corresponding path program 6 times [2024-06-21 18:51:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:54,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984182021] [2024-06-21 18:51:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:55,984 INFO 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 18:51:55,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:55,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984182021] [2024-06-21 18:51:55,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984182021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:55,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:55,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:55,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891956758] [2024-06-21 18:51:55,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:55,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:55,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:55,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:55,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:56,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 483 transitions, 7198 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:57,758 INFO L124 PetriNetUnfolderBase]: 5219/8393 cut-off events. [2024-06-21 18:51:57,758 INFO L125 PetriNetUnfolderBase]: For 628246/628250 co-relation queries the response was YES. [2024-06-21 18:51:57,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65183 conditions, 8393 events. 5219/8393 cut-off events. For 628246/628250 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 55920 event pairs, 1694 based on Foata normal form. 6/8398 useless extension candidates. Maximal degree in co-relation 65033. Up to 7570 conditions per place. [2024-06-21 18:51:57,874 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 162 changer transitions 0/513 dead transitions. [2024-06-21 18:51:57,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 513 transitions, 9120 flow [2024-06-21 18:51:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 18:51:57,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 18:51:57,876 INFO L175 Difference]: Start difference. First operand has 297 places, 483 transitions, 7198 flow. Second operand 9 states and 143 transitions. [2024-06-21 18:51:57,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 513 transitions, 9120 flow [2024-06-21 18:51:59,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 513 transitions, 8950 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:59,299 INFO L231 Difference]: Finished difference. Result has 301 places, 498 transitions, 7768 flow [2024-06-21 18:51:59,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7768, PETRI_PLACES=301, PETRI_TRANSITIONS=498} [2024-06-21 18:51:59,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 18:51:59,300 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 498 transitions, 7768 flow [2024-06-21 18:51:59,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:59,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:59,300 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 18:51:59,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:51:59,301 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 18:51:59,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 611700756, now seen corresponding path program 4 times [2024-06-21 18:51:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843545752] [2024-06-21 18:51:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:59,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:00,758 INFO 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 18:52:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843545752] [2024-06-21 18:52:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843545752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:00,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:52:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958208631] [2024-06-21 18:52:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:52:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:52:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:52:00,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:52:00,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 498 transitions, 7768 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:00,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:00,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:52:00,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:02,506 INFO L124 PetriNetUnfolderBase]: 5216/8390 cut-off events. [2024-06-21 18:52:02,506 INFO L125 PetriNetUnfolderBase]: For 639315/639319 co-relation queries the response was YES. [2024-06-21 18:52:02,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66380 conditions, 8390 events. 5216/8390 cut-off events. For 639315/639319 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55879 event pairs, 1950 based on Foata normal form. 5/8394 useless extension candidates. Maximal degree in co-relation 66229. Up to 8041 conditions per place. [2024-06-21 18:52:02,621 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 53 changer transitions 0/521 dead transitions. [2024-06-21 18:52:02,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 521 transitions, 8965 flow [2024-06-21 18:52:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:52:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:52:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 18:52:02,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 18:52:02,623 INFO L175 Difference]: Start difference. First operand has 301 places, 498 transitions, 7768 flow. Second operand 7 states and 127 transitions. [2024-06-21 18:52:02,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 521 transitions, 8965 flow [2024-06-21 18:52:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 521 transitions, 8660 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 18:52:04,612 INFO L231 Difference]: Finished difference. Result has 306 places, 511 transitions, 7762 flow [2024-06-21 18:52:04,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7463, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7762, PETRI_PLACES=306, PETRI_TRANSITIONS=511} [2024-06-21 18:52:04,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 18:52:04,622 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 511 transitions, 7762 flow [2024-06-21 18:52:04,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:04,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:04,622 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 18:52:04,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:52:04,622 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 18:52:04,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:04,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1070788972, now seen corresponding path program 7 times [2024-06-21 18:52:04,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:04,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736152124] [2024-06-21 18:52:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:05,309 INFO 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 18:52:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736152124] [2024-06-21 18:52:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736152124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:05,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:05,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:52:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425250075] [2024-06-21 18:52:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:52:05,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:05,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:52:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:52:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:05,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 511 transitions, 7762 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:05,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:07,222 INFO L124 PetriNetUnfolderBase]: 5220/8391 cut-off events. [2024-06-21 18:52:07,223 INFO L125 PetriNetUnfolderBase]: For 642883/642887 co-relation queries the response was YES. [2024-06-21 18:52:07,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65604 conditions, 8391 events. 5220/8391 cut-off events. For 642883/642887 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55911 event pairs, 1679 based on Foata normal form. 6/8396 useless extension candidates. Maximal degree in co-relation 65449. Up to 7917 conditions per place. [2024-06-21 18:52:07,538 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 459 selfloop transitions, 72 changer transitions 0/535 dead transitions. [2024-06-21 18:52:07,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 535 transitions, 8943 flow [2024-06-21 18:52:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 18:52:07,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 18:52:07,539 INFO L175 Difference]: Start difference. First operand has 306 places, 511 transitions, 7762 flow. Second operand 8 states and 137 transitions. [2024-06-21 18:52:07,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 535 transitions, 8943 flow [2024-06-21 18:52:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 535 transitions, 8780 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-21 18:52:08,769 INFO L231 Difference]: Finished difference. Result has 312 places, 515 transitions, 7817 flow [2024-06-21 18:52:08,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7817, PETRI_PLACES=312, PETRI_TRANSITIONS=515} [2024-06-21 18:52:08,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 18:52:08,770 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 515 transitions, 7817 flow [2024-06-21 18:52:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:08,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:08,770 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 18:52:08,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:52:08,771 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:08,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash 547150963, now seen corresponding path program 7 times [2024-06-21 18:52:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922184696] [2024-06-21 18:52:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:09,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922184696] [2024-06-21 18:52:09,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922184696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:09,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:09,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138133406] [2024-06-21 18:52:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:09,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:09,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:09,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 515 transitions, 7817 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:09,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:09,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:09,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:11,732 INFO L124 PetriNetUnfolderBase]: 5240/8427 cut-off events. [2024-06-21 18:52:11,732 INFO L125 PetriNetUnfolderBase]: For 659562/659568 co-relation queries the response was YES. [2024-06-21 18:52:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66189 conditions, 8427 events. 5240/8427 cut-off events. For 659562/659568 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 56337 event pairs, 1735 based on Foata normal form. 8/8434 useless extension candidates. Maximal degree in co-relation 66031. Up to 7932 conditions per place. [2024-06-21 18:52:11,839 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 456 selfloop transitions, 87 changer transitions 0/547 dead transitions. [2024-06-21 18:52:11,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 547 transitions, 9138 flow [2024-06-21 18:52:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 18:52:11,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 18:52:11,841 INFO L175 Difference]: Start difference. First operand has 312 places, 515 transitions, 7817 flow. Second operand 9 states and 152 transitions. [2024-06-21 18:52:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 547 transitions, 9138 flow [2024-06-21 18:52:13,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 547 transitions, 8968 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:13,357 INFO L231 Difference]: Finished difference. Result has 314 places, 523 transitions, 8003 flow [2024-06-21 18:52:13,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7647, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8003, PETRI_PLACES=314, PETRI_TRANSITIONS=523} [2024-06-21 18:52:13,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 18:52:13,358 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 523 transitions, 8003 flow [2024-06-21 18:52:13,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:13,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:13,358 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 18:52:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:52:13,358 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:13,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash 619303662, now seen corresponding path program 8 times [2024-06-21 18:52:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:13,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202712300] [2024-06-21 18:52:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:14,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:14,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202712300] [2024-06-21 18:52:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202712300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:14,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:14,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:52:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104711364] [2024-06-21 18:52:14,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:14,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:52:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:52:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:52:14,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:14,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 523 transitions, 8003 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:14,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:14,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:14,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:15,936 INFO L124 PetriNetUnfolderBase]: 5232/8408 cut-off events. [2024-06-21 18:52:15,936 INFO L125 PetriNetUnfolderBase]: For 668394/668398 co-relation queries the response was YES. [2024-06-21 18:52:16,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66250 conditions, 8408 events. 5232/8408 cut-off events. For 668394/668398 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 56027 event pairs, 1671 based on Foata normal form. 6/8413 useless extension candidates. Maximal degree in co-relation 66091. Up to 7850 conditions per place. [2024-06-21 18:52:16,043 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 433 selfloop transitions, 104 changer transitions 0/541 dead transitions. [2024-06-21 18:52:16,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 541 transitions, 9137 flow [2024-06-21 18:52:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:52:16,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 18:52:16,044 INFO L175 Difference]: Start difference. First operand has 314 places, 523 transitions, 8003 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:52:16,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 541 transitions, 9137 flow [2024-06-21 18:52:17,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 541 transitions, 8836 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:17,850 INFO L231 Difference]: Finished difference. Result has 315 places, 523 transitions, 7929 flow [2024-06-21 18:52:17,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7929, PETRI_PLACES=315, PETRI_TRANSITIONS=523} [2024-06-21 18:52:17,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 18:52:17,851 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 523 transitions, 7929 flow [2024-06-21 18:52:17,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:17,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:17,851 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 18:52:17,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:52:17,851 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:17,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash -368558447, now seen corresponding path program 8 times [2024-06-21 18:52:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:17,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818539833] [2024-06-21 18:52:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:18,949 INFO 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 18:52:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818539833] [2024-06-21 18:52:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818539833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:18,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:18,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412505066] [2024-06-21 18:52:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:19,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:19,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 523 transitions, 7929 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:19,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:19,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:20,857 INFO L124 PetriNetUnfolderBase]: 5267/8461 cut-off events. [2024-06-21 18:52:20,858 INFO L125 PetriNetUnfolderBase]: For 688943/688949 co-relation queries the response was YES. [2024-06-21 18:52:20,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66712 conditions, 8461 events. 5267/8461 cut-off events. For 688943/688949 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 56415 event pairs, 1660 based on Foata normal form. 10/8470 useless extension candidates. Maximal degree in co-relation 66552. Up to 7953 conditions per place. [2024-06-21 18:52:20,979 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 468 selfloop transitions, 88 changer transitions 0/560 dead transitions. [2024-06-21 18:52:20,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 560 transitions, 9358 flow [2024-06-21 18:52:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:52:20,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:52:20,980 INFO L175 Difference]: Start difference. First operand has 315 places, 523 transitions, 7929 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:52:20,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 560 transitions, 9358 flow [2024-06-21 18:52:22,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 560 transitions, 9189 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:22,578 INFO L231 Difference]: Finished difference. Result has 318 places, 535 transitions, 8169 flow [2024-06-21 18:52:22,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8169, PETRI_PLACES=318, PETRI_TRANSITIONS=535} [2024-06-21 18:52:22,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 18:52:22,579 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 535 transitions, 8169 flow [2024-06-21 18:52:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:22,580 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 18:52:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:52:22,580 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:22,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1621504269, now seen corresponding path program 9 times [2024-06-21 18:52:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632226267] [2024-06-21 18:52:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:23,630 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 18:52:23,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:23,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632226267] [2024-06-21 18:52:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632226267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:23,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:23,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:23,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176723110] [2024-06-21 18:52:23,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:23,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:23,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:23,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:23,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:23,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 535 transitions, 8169 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:23,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:23,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:23,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:25,526 INFO L124 PetriNetUnfolderBase]: 5287/8487 cut-off events. [2024-06-21 18:52:25,526 INFO L125 PetriNetUnfolderBase]: For 701845/701849 co-relation queries the response was YES. [2024-06-21 18:52:25,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68084 conditions, 8487 events. 5287/8487 cut-off events. For 701845/701849 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 56650 event pairs, 1671 based on Foata normal form. 6/8492 useless extension candidates. Maximal degree in co-relation 67923. Up to 7915 conditions per place. [2024-06-21 18:52:25,649 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 447 selfloop transitions, 111 changer transitions 0/562 dead transitions. [2024-06-21 18:52:25,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 562 transitions, 9514 flow [2024-06-21 18:52:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 18:52:25,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 18:52:25,650 INFO L175 Difference]: Start difference. First operand has 318 places, 535 transitions, 8169 flow. Second operand 9 states and 148 transitions. [2024-06-21 18:52:25,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 562 transitions, 9514 flow [2024-06-21 18:52:27,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 562 transitions, 9324 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:27,378 INFO L231 Difference]: Finished difference. Result has 321 places, 543 transitions, 8396 flow [2024-06-21 18:52:27,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7979, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8396, PETRI_PLACES=321, PETRI_TRANSITIONS=543} [2024-06-21 18:52:27,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 18:52:27,378 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 543 transitions, 8396 flow [2024-06-21 18:52:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:27,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:27,379 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 18:52:27,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:52:27,379 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:27,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1261342239, now seen corresponding path program 10 times [2024-06-21 18:52:27,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:27,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987456639] [2024-06-21 18:52:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:27,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:28,746 INFO 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 18:52:28,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:28,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987456639] [2024-06-21 18:52:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987456639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:28,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:28,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446121675] [2024-06-21 18:52:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:28,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:28,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:28,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:28,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:28,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 543 transitions, 8396 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:28,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:28,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:28,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:30,866 INFO L124 PetriNetUnfolderBase]: 5319/8540 cut-off events. [2024-06-21 18:52:30,866 INFO L125 PetriNetUnfolderBase]: For 721770/721774 co-relation queries the response was YES. [2024-06-21 18:52:30,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68886 conditions, 8540 events. 5319/8540 cut-off events. For 721770/721774 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 56973 event pairs, 1671 based on Foata normal form. 6/8545 useless extension candidates. Maximal degree in co-relation 68724. Up to 7861 conditions per place. [2024-06-21 18:52:30,971 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 442 selfloop transitions, 132 changer transitions 0/578 dead transitions. [2024-06-21 18:52:30,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 578 transitions, 10108 flow [2024-06-21 18:52:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:52:30,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 18:52:30,972 INFO L175 Difference]: Start difference. First operand has 321 places, 543 transitions, 8396 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:52:30,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 578 transitions, 10108 flow [2024-06-21 18:52:32,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 578 transitions, 9794 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:32,627 INFO L231 Difference]: Finished difference. Result has 324 places, 558 transitions, 8762 flow [2024-06-21 18:52:32,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8082, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8762, PETRI_PLACES=324, PETRI_TRANSITIONS=558} [2024-06-21 18:52:32,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 18:52:32,628 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 558 transitions, 8762 flow [2024-06-21 18:52:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:32,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:32,628 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 18:52:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:52:32,628 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:32,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1854898522, now seen corresponding path program 1 times [2024-06-21 18:52:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:32,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070568562] [2024-06-21 18:52:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:33,567 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 18:52:33,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:33,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070568562] [2024-06-21 18:52:33,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070568562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:33,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:33,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:33,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376346173] [2024-06-21 18:52:33,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:33,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:33,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:33,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:52:33,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 558 transitions, 8762 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:33,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:33,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:52:33,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:35,650 INFO L124 PetriNetUnfolderBase]: 5274/8514 cut-off events. [2024-06-21 18:52:35,650 INFO L125 PetriNetUnfolderBase]: For 740729/740729 co-relation queries the response was YES. [2024-06-21 18:52:35,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69277 conditions, 8514 events. 5274/8514 cut-off events. For 740729/740729 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 57348 event pairs, 2295 based on Foata normal form. 1/8514 useless extension candidates. Maximal degree in co-relation 69113. Up to 7991 conditions per place. [2024-06-21 18:52:35,763 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 525 selfloop transitions, 28 changer transitions 0/587 dead transitions. [2024-06-21 18:52:35,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 587 transitions, 10096 flow [2024-06-21 18:52:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:52:35,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 18:52:35,764 INFO L175 Difference]: Start difference. First operand has 324 places, 558 transitions, 8762 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:52:35,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 587 transitions, 10096 flow [2024-06-21 18:52:37,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 587 transitions, 9835 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:37,676 INFO L231 Difference]: Finished difference. Result has 328 places, 569 transitions, 8748 flow [2024-06-21 18:52:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8505, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8748, PETRI_PLACES=328, PETRI_TRANSITIONS=569} [2024-06-21 18:52:37,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 18:52:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 569 transitions, 8748 flow [2024-06-21 18:52:37,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:37,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:37,678 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 18:52:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:52:37,678 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:37,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2046712689, now seen corresponding path program 1 times [2024-06-21 18:52:37,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:37,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640011054] [2024-06-21 18:52:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:38,800 INFO 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 18:52:38,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640011054] [2024-06-21 18:52:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640011054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:38,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:38,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100703211] [2024-06-21 18:52:38,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:38,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:38,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 569 transitions, 8748 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:38,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:38,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:38,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:40,811 INFO L124 PetriNetUnfolderBase]: 5351/8595 cut-off events. [2024-06-21 18:52:40,811 INFO L125 PetriNetUnfolderBase]: For 752843/752843 co-relation queries the response was YES. [2024-06-21 18:52:40,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69855 conditions, 8595 events. 5351/8595 cut-off events. For 752843/752843 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 57483 event pairs, 2325 based on Foata normal form. 2/8596 useless extension candidates. Maximal degree in co-relation 69688. Up to 8264 conditions per place. [2024-06-21 18:52:40,948 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 560 selfloop transitions, 25 changer transitions 0/589 dead transitions. [2024-06-21 18:52:40,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 589 transitions, 10042 flow [2024-06-21 18:52:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 18:52:40,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-21 18:52:40,950 INFO L175 Difference]: Start difference. First operand has 328 places, 569 transitions, 8748 flow. Second operand 9 states and 134 transitions. [2024-06-21 18:52:40,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 589 transitions, 10042 flow [2024-06-21 18:52:42,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 589 transitions, 9970 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:42,881 INFO L231 Difference]: Finished difference. Result has 332 places, 572 transitions, 8790 flow [2024-06-21 18:52:42,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8676, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8790, PETRI_PLACES=332, PETRI_TRANSITIONS=572} [2024-06-21 18:52:42,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 18:52:42,881 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 572 transitions, 8790 flow [2024-06-21 18:52:42,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:42,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:42,882 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 18:52:42,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:52:42,882 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:42,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2050431759, now seen corresponding path program 2 times [2024-06-21 18:52:42,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:42,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412127274] [2024-06-21 18:52:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:44,156 INFO 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 18:52:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412127274] [2024-06-21 18:52:44,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412127274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:44,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:44,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:44,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368852879] [2024-06-21 18:52:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:44,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:44,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 572 transitions, 8790 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:44,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:44,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:44,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:46,171 INFO L124 PetriNetUnfolderBase]: 5366/8616 cut-off events. [2024-06-21 18:52:46,171 INFO L125 PetriNetUnfolderBase]: For 769390/769390 co-relation queries the response was YES. [2024-06-21 18:52:46,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70718 conditions, 8616 events. 5366/8616 cut-off events. For 769390/769390 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 57585 event pairs, 2324 based on Foata normal form. 2/8617 useless extension candidates. Maximal degree in co-relation 70550. Up to 8268 conditions per place. [2024-06-21 18:52:46,300 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 553 selfloop transitions, 35 changer transitions 0/592 dead transitions. [2024-06-21 18:52:46,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 592 transitions, 10111 flow [2024-06-21 18:52:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 18:52:46,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-21 18:52:46,302 INFO L175 Difference]: Start difference. First operand has 332 places, 572 transitions, 8790 flow. Second operand 9 states and 134 transitions. [2024-06-21 18:52:46,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 592 transitions, 10111 flow [2024-06-21 18:52:48,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 592 transitions, 10019 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:48,412 INFO L231 Difference]: Finished difference. Result has 335 places, 578 transitions, 8891 flow [2024-06-21 18:52:48,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8698, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8891, PETRI_PLACES=335, PETRI_TRANSITIONS=578} [2024-06-21 18:52:48,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-21 18:52:48,413 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 578 transitions, 8891 flow [2024-06-21 18:52:48,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:48,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:48,414 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 18:52:48,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:52:48,414 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:48,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash -591582158, now seen corresponding path program 2 times [2024-06-21 18:52:48,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:48,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646581557] [2024-06-21 18:52:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:48,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:49,466 INFO 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 18:52:49,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:49,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646581557] [2024-06-21 18:52:49,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646581557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:49,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052248765] [2024-06-21 18:52:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:49,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:49,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:52:49,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 578 transitions, 8891 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:49,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:49,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:52:49,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:51,678 INFO L124 PetriNetUnfolderBase]: 5304/8555 cut-off events. [2024-06-21 18:52:51,679 INFO L125 PetriNetUnfolderBase]: For 785693/785699 co-relation queries the response was YES. [2024-06-21 18:52:51,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71076 conditions, 8555 events. 5304/8555 cut-off events. For 785693/785699 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 57566 event pairs, 2252 based on Foata normal form. 1/8550 useless extension candidates. Maximal degree in co-relation 70906. Up to 8017 conditions per place. [2024-06-21 18:52:51,796 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 518 selfloop transitions, 39 changer transitions 0/593 dead transitions. [2024-06-21 18:52:51,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 593 transitions, 10088 flow [2024-06-21 18:52:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:52:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:52:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 18:52:51,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 18:52:51,798 INFO L175 Difference]: Start difference. First operand has 335 places, 578 transitions, 8891 flow. Second operand 7 states and 120 transitions. [2024-06-21 18:52:51,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 593 transitions, 10088 flow [2024-06-21 18:52:53,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 593 transitions, 9962 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:53,652 INFO L231 Difference]: Finished difference. Result has 336 places, 581 transitions, 8893 flow [2024-06-21 18:52:53,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8765, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8893, PETRI_PLACES=336, PETRI_TRANSITIONS=581} [2024-06-21 18:52:53,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-21 18:52:53,653 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 581 transitions, 8893 flow [2024-06-21 18:52:53,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:53,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:53,653 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 18:52:53,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:52:53,653 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:53,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash -591576206, now seen corresponding path program 1 times [2024-06-21 18:52:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:53,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796862503] [2024-06-21 18:52:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:54,991 INFO 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 18:52:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796862503] [2024-06-21 18:52:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796862503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:54,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:54,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:54,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456662915] [2024-06-21 18:52:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:54,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:55,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:55,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 581 transitions, 8893 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:55,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:55,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:55,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:57,147 INFO L124 PetriNetUnfolderBase]: 5362/8611 cut-off events. [2024-06-21 18:52:57,147 INFO L125 PetriNetUnfolderBase]: For 788828/788828 co-relation queries the response was YES. [2024-06-21 18:52:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71175 conditions, 8611 events. 5362/8611 cut-off events. For 788828/788828 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 57588 event pairs, 2281 based on Foata normal form. 2/8612 useless extension candidates. Maximal degree in co-relation 71004. Up to 8293 conditions per place. [2024-06-21 18:52:57,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 566 selfloop transitions, 24 changer transitions 0/594 dead transitions. [2024-06-21 18:52:57,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 594 transitions, 10115 flow [2024-06-21 18:52:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-21 18:52:57,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523035230352303 [2024-06-21 18:52:57,283 INFO L175 Difference]: Start difference. First operand has 336 places, 581 transitions, 8893 flow. Second operand 9 states and 130 transitions. [2024-06-21 18:52:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 594 transitions, 10115 flow [2024-06-21 18:52:59,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 594 transitions, 10011 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 18:52:59,338 INFO L231 Difference]: Finished difference. Result has 341 places, 581 transitions, 8843 flow [2024-06-21 18:52:59,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8843, PETRI_PLACES=341, PETRI_TRANSITIONS=581} [2024-06-21 18:52:59,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-21 18:52:59,339 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 581 transitions, 8843 flow [2024-06-21 18:52:59,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:59,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:59,339 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 18:52:59,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:52:59,340 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 18:52:59,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash -591576423, now seen corresponding path program 3 times [2024-06-21 18:52:59,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:59,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065576378] [2024-06-21 18:52:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:00,646 INFO 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 18:53:00,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:00,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065576378] [2024-06-21 18:53:00,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065576378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:00,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:00,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349062282] [2024-06-21 18:53:00,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:00,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:00,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:00,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:00,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:00,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 581 transitions, 8843 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:00,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:00,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:00,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:02,605 INFO L124 PetriNetUnfolderBase]: 5375/8629 cut-off events. [2024-06-21 18:53:02,606 INFO L125 PetriNetUnfolderBase]: For 803790/803790 co-relation queries the response was YES. [2024-06-21 18:53:02,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71521 conditions, 8629 events. 5375/8629 cut-off events. For 803790/803790 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 57715 event pairs, 2281 based on Foata normal form. 1/8629 useless extension candidates. Maximal degree in co-relation 71349. Up to 8310 conditions per place. [2024-06-21 18:53:02,742 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 27 changer transitions 0/600 dead transitions. [2024-06-21 18:53:02,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 600 transitions, 10377 flow [2024-06-21 18:53:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-21 18:53:02,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-21 18:53:02,744 INFO L175 Difference]: Start difference. First operand has 341 places, 581 transitions, 8843 flow. Second operand 9 states and 131 transitions. [2024-06-21 18:53:02,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 600 transitions, 10377 flow [2024-06-21 18:53:04,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 600 transitions, 10298 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:04,833 INFO L231 Difference]: Finished difference. Result has 343 places, 587 transitions, 8961 flow [2024-06-21 18:53:04,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8764, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8961, PETRI_PLACES=343, PETRI_TRANSITIONS=587} [2024-06-21 18:53:04,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 18:53:04,834 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 587 transitions, 8961 flow [2024-06-21 18:53:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:04,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:04,834 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 18:53:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:53:04,835 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:04,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 604533401, now seen corresponding path program 4 times [2024-06-21 18:53:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821116870] [2024-06-21 18:53:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:05,949 INFO 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 18:53:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:05,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821116870] [2024-06-21 18:53:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821116870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:05,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:05,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83294632] [2024-06-21 18:53:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:06,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:06,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 587 transitions, 8961 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:06,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:06,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:06,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:08,049 INFO L124 PetriNetUnfolderBase]: 5388/8648 cut-off events. [2024-06-21 18:53:08,049 INFO L125 PetriNetUnfolderBase]: For 829655/829659 co-relation queries the response was YES. [2024-06-21 18:53:08,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72989 conditions, 8648 events. 5388/8648 cut-off events. For 829655/829659 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 57786 event pairs, 2283 based on Foata normal form. 5/8652 useless extension candidates. Maximal degree in co-relation 72815. Up to 8324 conditions per place. [2024-06-21 18:53:08,187 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 32 changer transitions 0/605 dead transitions. [2024-06-21 18:53:08,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 605 transitions, 10540 flow [2024-06-21 18:53:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-21 18:53:08,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523035230352303 [2024-06-21 18:53:08,189 INFO L175 Difference]: Start difference. First operand has 343 places, 587 transitions, 8961 flow. Second operand 9 states and 130 transitions. [2024-06-21 18:53:08,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 605 transitions, 10540 flow [2024-06-21 18:53:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 605 transitions, 10457 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:10,907 INFO L231 Difference]: Finished difference. Result has 348 places, 594 transitions, 9125 flow [2024-06-21 18:53:10,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8878, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9125, PETRI_PLACES=348, PETRI_TRANSITIONS=594} [2024-06-21 18:53:10,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 18:53:10,908 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 594 transitions, 9125 flow [2024-06-21 18:53:10,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:10,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:10,908 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 18:53:10,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:53:10,908 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:10,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash 604527666, now seen corresponding path program 3 times [2024-06-21 18:53:10,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:10,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533807932] [2024-06-21 18:53:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:10,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:12,310 INFO 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 18:53:12,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:12,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533807932] [2024-06-21 18:53:12,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533807932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:12,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:12,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334752145] [2024-06-21 18:53:12,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:12,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:12,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:53:12,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 594 transitions, 9125 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:12,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:12,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:53:12,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:14,705 INFO L124 PetriNetUnfolderBase]: 5321/8581 cut-off events. [2024-06-21 18:53:14,705 INFO L125 PetriNetUnfolderBase]: For 855330/855342 co-relation queries the response was YES. [2024-06-21 18:53:14,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73834 conditions, 8581 events. 5321/8581 cut-off events. For 855330/855342 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 57795 event pairs, 2261 based on Foata normal form. 1/8576 useless extension candidates. Maximal degree in co-relation 73657. Up to 8019 conditions per place. [2024-06-21 18:53:14,822 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 514 selfloop transitions, 48 changer transitions 0/603 dead transitions. [2024-06-21 18:53:14,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 603 transitions, 10279 flow [2024-06-21 18:53:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:53:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:53:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 18:53:14,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:53:14,823 INFO L175 Difference]: Start difference. First operand has 348 places, 594 transitions, 9125 flow. Second operand 7 states and 119 transitions. [2024-06-21 18:53:14,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 603 transitions, 10279 flow [2024-06-21 18:53:17,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 603 transitions, 10142 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:17,344 INFO L231 Difference]: Finished difference. Result has 350 places, 594 transitions, 9092 flow [2024-06-21 18:53:17,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8988, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9092, PETRI_PLACES=350, PETRI_TRANSITIONS=594} [2024-06-21 18:53:17,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-21 18:53:17,345 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 594 transitions, 9092 flow [2024-06-21 18:53:17,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:17,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:17,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:53:17,345 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -447691473, now seen corresponding path program 5 times [2024-06-21 18:53:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317312587] [2024-06-21 18:53:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:18,636 INFO 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 18:53:18,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:18,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317312587] [2024-06-21 18:53:18,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317312587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:18,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:18,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:18,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583357543] [2024-06-21 18:53:18,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:18,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:18,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:18,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:53:18,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 594 transitions, 9092 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:18,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:18,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:53:18,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:21,229 INFO L124 PetriNetUnfolderBase]: 5328/8592 cut-off events. [2024-06-21 18:53:21,230 INFO L125 PetriNetUnfolderBase]: For 875321/875333 co-relation queries the response was YES. [2024-06-21 18:53:21,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74117 conditions, 8592 events. 5328/8592 cut-off events. For 875321/875333 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 57814 event pairs, 2261 based on Foata normal form. 2/8588 useless extension candidates. Maximal degree in co-relation 73938. Up to 8037 conditions per place. [2024-06-21 18:53:21,362 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 524 selfloop transitions, 42 changer transitions 0/607 dead transitions. [2024-06-21 18:53:21,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 607 transitions, 10304 flow [2024-06-21 18:53:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 18:53:21,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-21 18:53:21,364 INFO L175 Difference]: Start difference. First operand has 350 places, 594 transitions, 9092 flow. Second operand 9 states and 140 transitions. [2024-06-21 18:53:21,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 607 transitions, 10304 flow [2024-06-21 18:53:23,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 607 transitions, 10206 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:23,829 INFO L231 Difference]: Finished difference. Result has 354 places, 597 transitions, 9138 flow [2024-06-21 18:53:23,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8994, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9138, PETRI_PLACES=354, PETRI_TRANSITIONS=597} [2024-06-21 18:53:23,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-21 18:53:23,830 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 597 transitions, 9138 flow [2024-06-21 18:53:23,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:23,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:23,830 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 18:53:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:53:23,831 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:23,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1154030335, now seen corresponding path program 6 times [2024-06-21 18:53:23,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:23,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563104979] [2024-06-21 18:53:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:25,133 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 18:53:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:25,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563104979] [2024-06-21 18:53:25,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563104979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:25,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:25,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113851928] [2024-06-21 18:53:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:25,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:25,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:25,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 597 transitions, 9138 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:25,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:25,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:25,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:27,564 INFO L124 PetriNetUnfolderBase]: 5400/8665 cut-off events. [2024-06-21 18:53:27,565 INFO L125 PetriNetUnfolderBase]: For 880320/880324 co-relation queries the response was YES. [2024-06-21 18:53:27,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75296 conditions, 8665 events. 5400/8665 cut-off events. For 880320/880324 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 57875 event pairs, 2283 based on Foata normal form. 5/8669 useless extension candidates. Maximal degree in co-relation 75116. Up to 8316 conditions per place. [2024-06-21 18:53:27,682 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 48 changer transitions 0/615 dead transitions. [2024-06-21 18:53:27,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 615 transitions, 10926 flow [2024-06-21 18:53:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 18:53:27,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-21 18:53:27,684 INFO L175 Difference]: Start difference. First operand has 354 places, 597 transitions, 9138 flow. Second operand 9 states and 134 transitions. [2024-06-21 18:53:27,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 615 transitions, 10926 flow [2024-06-21 18:53:30,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 615 transitions, 10814 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:30,013 INFO L231 Difference]: Finished difference. Result has 357 places, 603 transitions, 9294 flow [2024-06-21 18:53:30,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9294, PETRI_PLACES=357, PETRI_TRANSITIONS=603} [2024-06-21 18:53:30,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 18:53:30,016 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 603 transitions, 9294 flow [2024-06-21 18:53:30,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:30,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:30,016 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 18:53:30,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:53:30,016 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:30,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash 612162098, now seen corresponding path program 1 times [2024-06-21 18:53:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:30,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784254050] [2024-06-21 18:53:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:32,322 INFO 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 18:53:32,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:32,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784254050] [2024-06-21 18:53:32,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784254050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:32,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:32,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:53:32,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257847095] [2024-06-21 18:53:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:32,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:53:32,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:53:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:53:32,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:32,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 603 transitions, 9294 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:32,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:32,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:32,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:35,105 INFO L124 PetriNetUnfolderBase]: 5395/8657 cut-off events. [2024-06-21 18:53:35,106 INFO L125 PetriNetUnfolderBase]: For 903846/903846 co-relation queries the response was YES. [2024-06-21 18:53:35,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76152 conditions, 8657 events. 5395/8657 cut-off events. For 903846/903846 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 57834 event pairs, 2282 based on Foata normal form. 2/8658 useless extension candidates. Maximal degree in co-relation 75970. Up to 8349 conditions per place. [2024-06-21 18:53:35,224 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 21 changer transitions 0/618 dead transitions. [2024-06-21 18:53:35,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 618 transitions, 10661 flow [2024-06-21 18:53:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 18:53:35,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33658536585365856 [2024-06-21 18:53:35,226 INFO L175 Difference]: Start difference. First operand has 357 places, 603 transitions, 9294 flow. Second operand 10 states and 138 transitions. [2024-06-21 18:53:35,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 618 transitions, 10661 flow [2024-06-21 18:53:38,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 618 transitions, 10321 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:38,041 INFO L231 Difference]: Finished difference. Result has 361 places, 606 transitions, 9114 flow [2024-06-21 18:53:38,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8954, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9114, PETRI_PLACES=361, PETRI_TRANSITIONS=606} [2024-06-21 18:53:38,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-21 18:53:38,042 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 606 transitions, 9114 flow [2024-06-21 18:53:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:38,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:38,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:53:38,050 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:38,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash 61495652, now seen corresponding path program 1 times [2024-06-21 18:53:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434005315] [2024-06-21 18:53:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:38,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:38,887 INFO 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 18:53:38,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434005315] [2024-06-21 18:53:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434005315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:38,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:38,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587574275] [2024-06-21 18:53:38,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:38,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:38,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 606 transitions, 9114 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:38,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:38,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:38,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:41,525 INFO L124 PetriNetUnfolderBase]: 5405/8656 cut-off events. [2024-06-21 18:53:41,525 INFO L125 PetriNetUnfolderBase]: For 917202/917204 co-relation queries the response was YES. [2024-06-21 18:53:41,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75795 conditions, 8656 events. 5405/8656 cut-off events. For 917202/917204 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 57557 event pairs, 1331 based on Foata normal form. 2/8657 useless extension candidates. Maximal degree in co-relation 75612. Up to 7736 conditions per place. [2024-06-21 18:53:41,647 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 500 selfloop transitions, 140 changer transitions 0/644 dead transitions. [2024-06-21 18:53:41,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 644 transitions, 10810 flow [2024-06-21 18:53:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 18:53:41,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 18:53:41,648 INFO L175 Difference]: Start difference. First operand has 361 places, 606 transitions, 9114 flow. Second operand 9 states and 151 transitions. [2024-06-21 18:53:41,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 644 transitions, 10810 flow [2024-06-21 18:53:44,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 644 transitions, 10675 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:44,462 INFO L231 Difference]: Finished difference. Result has 364 places, 623 transitions, 9599 flow [2024-06-21 18:53:44,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8979, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9599, PETRI_PLACES=364, PETRI_TRANSITIONS=623} [2024-06-21 18:53:44,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 18:53:44,463 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 623 transitions, 9599 flow [2024-06-21 18:53:44,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:44,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:44,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:44,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:53:44,464 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:44,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 61615808, now seen corresponding path program 1 times [2024-06-21 18:53:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:44,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83198173] [2024-06-21 18:53:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:45,791 INFO 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 18:53:45,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:45,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83198173] [2024-06-21 18:53:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83198173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:45,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991695789] [2024-06-21 18:53:45,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:45,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:45,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:45,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:45,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 623 transitions, 9599 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:45,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:45,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:45,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:48,384 INFO L124 PetriNetUnfolderBase]: 5425/8688 cut-off events. [2024-06-21 18:53:48,384 INFO L125 PetriNetUnfolderBase]: For 952306/952310 co-relation queries the response was YES. [2024-06-21 18:53:48,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78196 conditions, 8688 events. 5425/8688 cut-off events. For 952306/952310 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 57891 event pairs, 1569 based on Foata normal form. 8/8695 useless extension candidates. Maximal degree in co-relation 78011. Up to 8182 conditions per place. [2024-06-21 18:53:48,503 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 561 selfloop transitions, 81 changer transitions 0/646 dead transitions. [2024-06-21 18:53:48,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 646 transitions, 11113 flow [2024-06-21 18:53:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 18:53:48,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 18:53:48,505 INFO L175 Difference]: Start difference. First operand has 364 places, 623 transitions, 9599 flow. Second operand 9 states and 143 transitions. [2024-06-21 18:53:48,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 646 transitions, 11113 flow [2024-06-21 18:53:51,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 646 transitions, 10789 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:51,697 INFO L231 Difference]: Finished difference. Result has 368 places, 631 transitions, 9648 flow [2024-06-21 18:53:51,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9275, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9648, PETRI_PLACES=368, PETRI_TRANSITIONS=631} [2024-06-21 18:53:51,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-21 18:53:51,697 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 631 transitions, 9648 flow [2024-06-21 18:53:51,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:51,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:51,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:51,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:53:51,698 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:51,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:51,698 INFO L85 PathProgramCache]: Analyzing trace with hash 61615622, now seen corresponding path program 2 times [2024-06-21 18:53:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:51,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284365755] [2024-06-21 18:53:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:51,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:52,526 INFO 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 18:53:52,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:52,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284365755] [2024-06-21 18:53:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284365755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:52,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:52,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000233743] [2024-06-21 18:53:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:52,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:52,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:52,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 631 transitions, 9648 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:52,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:52,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:52,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:54,931 INFO L124 PetriNetUnfolderBase]: 5451/8724 cut-off events. [2024-06-21 18:53:54,931 INFO L125 PetriNetUnfolderBase]: For 969873/969875 co-relation queries the response was YES. [2024-06-21 18:53:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78483 conditions, 8724 events. 5451/8724 cut-off events. For 969873/969875 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 58023 event pairs, 1336 based on Foata normal form. 2/8725 useless extension candidates. Maximal degree in co-relation 78297. Up to 7740 conditions per place. [2024-06-21 18:53:55,061 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 499 selfloop transitions, 155 changer transitions 0/658 dead transitions. [2024-06-21 18:53:55,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 658 transitions, 11471 flow [2024-06-21 18:53:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 18:53:55,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 18:53:55,063 INFO L175 Difference]: Start difference. First operand has 368 places, 631 transitions, 9648 flow. Second operand 9 states and 152 transitions. [2024-06-21 18:53:55,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 658 transitions, 11471 flow [2024-06-21 18:53:58,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 658 transitions, 11216 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:58,325 INFO L231 Difference]: Finished difference. Result has 371 places, 639 transitions, 9967 flow [2024-06-21 18:53:58,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9967, PETRI_PLACES=371, PETRI_TRANSITIONS=639} [2024-06-21 18:53:58,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-21 18:53:58,326 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 639 transitions, 9967 flow [2024-06-21 18:53:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:58,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:58,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:58,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:53:58,327 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:58,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash 238984478, now seen corresponding path program 2 times [2024-06-21 18:53:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:58,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355911041] [2024-06-21 18:53:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:58,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat