./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix042.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix042.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:03:07,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:03:07,530 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:03:07,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:03:07,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:03:07,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:03:07,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:03:07,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:03:07,578 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:03:07,583 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:03:07,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:03:07,584 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:03:07,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:03:07,585 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:03:07,586 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:03:07,586 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:03:07,586 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:03:07,587 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:03:07,587 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:03:07,587 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:03:07,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:03:07,588 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:03:07,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:03:07,588 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:03:07,588 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:03:07,589 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:03:07,589 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:03:07,589 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:03:07,590 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:03:07,590 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:03:07,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:03:07,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:03:07,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:03:07,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:03:07,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:03:07,592 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:03:07,592 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:03:07,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:03:07,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:03:07,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:03:07,593 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:03:07,594 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:03:07,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:03:07,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:03:07,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:03:07,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:03:07,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:03:07,856 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:03:07,857 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:03:07,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix042.opt.yml/witness.yml [2024-06-21 19:03:07,957 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:03:07,957 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:03:07,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-21 19:03:09,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:03:09,366 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:03:09,366 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-21 19:03:09,380 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78716c0b3/b686c9191c4f4f009b7f55d6226a2dd9/FLAG34cfabc1e [2024-06-21 19:03:09,395 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78716c0b3/b686c9191c4f4f009b7f55d6226a2dd9 [2024-06-21 19:03:09,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:03:09,398 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:03:09,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:03:09,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:03:09,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:03:09,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:03:07" (1/2) ... [2024-06-21 19:03:09,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158fec35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:03:09, skipping insertion in model container [2024-06-21 19:03:09,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:03:07" (1/2) ... [2024-06-21 19:03:09,407 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@520b989f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:03:09, skipping insertion in model container [2024-06-21 19:03:09,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:03:09" (2/2) ... [2024-06-21 19:03:09,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158fec35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:09, skipping insertion in model container [2024-06-21 19:03:09,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:03:09" (2/2) ... [2024-06-21 19:03:09,410 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:03:09,433 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:03:09,434 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 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 )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_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 )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 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$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:03:09,434 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 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 )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_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 )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 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$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:03:09,435 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 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 )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_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 )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 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$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:03:09,435 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:03:09,435 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-21 19:03:09,475 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:03:09,817 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:03:09,835 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:03:09,992 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:03:10,030 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:03:10,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10 WrapperNode [2024-06-21 19:03:10,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:03:10,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:03:10,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:03:10,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:03:10,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,136 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-21 19:03:10,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:03:10,138 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:03:10,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:03:10,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:03:10,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,201 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 19:03:10,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,210 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:03:10,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:03:10,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:03:10,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:03:10,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (1/1) ... [2024-06-21 19:03:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:03:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:03:10,281 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 19:03:10,306 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 19:03:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:03:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:03:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:03:10,327 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:03:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:03:10,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:03:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:03:10,329 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:03:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:03:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:03:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:03:10,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:03:10,331 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 19:03:10,498 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:03:10,500 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:03:11,044 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:03:11,046 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:03:11,223 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:03:11,223 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:03:11,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:03:11 BoogieIcfgContainer [2024-06-21 19:03:11,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:03:11,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:03:11,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:03:11,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:03:11,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:03:07" (1/4) ... [2024-06-21 19:03:11,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9663b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:03:11, skipping insertion in model container [2024-06-21 19:03:11,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:03:09" (2/4) ... [2024-06-21 19:03:11,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9663b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:03:11, skipping insertion in model container [2024-06-21 19:03:11,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:03:10" (3/4) ... [2024-06-21 19:03:11,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9663b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:03:11, skipping insertion in model container [2024-06-21 19:03:11,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:03:11" (4/4) ... [2024-06-21 19:03:11,236 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.opt.i [2024-06-21 19:03:11,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:03:11,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:03:11,253 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:03:11,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:03:11,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:03:11,378 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:03:11,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:03:11,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:03:11,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:03:11,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:03:11,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:03:11,398 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;@3f7adc6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:03:11,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:03:11,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:03:11,402 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:03:11,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:03:11,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:11,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:03:11,404 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 19:03:11,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash 371308986, now seen corresponding path program 1 times [2024-06-21 19:03:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904840568] [2024-06-21 19:03:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:12,787 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 19:03:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:12,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904840568] [2024-06-21 19:03:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904840568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:12,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:12,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:03:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166819416] [2024-06-21 19:03:12,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:12,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:03:12,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:03:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:03:12,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 19:03:12,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:12,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:12,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 19:03:12,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:13,311 INFO L124 PetriNetUnfolderBase]: 1059/1717 cut-off events. [2024-06-21 19:03:13,311 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 19:03:13,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 1717 events. 1059/1717 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8755 event pairs, 698 based on Foata normal form. 1/1664 useless extension candidates. Maximal degree in co-relation 3369. Up to 1593 conditions per place. [2024-06-21 19:03:13,329 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 19:03:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-21 19:03:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:03:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:03:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 19:03:13,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 19:03:13,343 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 77 transitions. [2024-06-21 19:03:13,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-21 19:03:13,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:13,349 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 19:03:13,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 19:03:13,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 19:03:13,354 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 19:03:13,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:13,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:13,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:13,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:03:13,355 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 19:03:13,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 345675033, now seen corresponding path program 1 times [2024-06-21 19:03:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:13,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848859665] [2024-06-21 19:03:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:14,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848859665] [2024-06-21 19:03:14,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848859665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:14,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:14,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:03:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768476248] [2024-06-21 19:03:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:14,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:03:14,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:03:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:03:14,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:03:14,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:14,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:14,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:03:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:14,692 INFO L124 PetriNetUnfolderBase]: 1215/1894 cut-off events. [2024-06-21 19:03:14,693 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-21 19:03:14,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 1894 events. 1215/1894 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9434 event pairs, 648 based on Foata normal form. 3/1872 useless extension candidates. Maximal degree in co-relation 4293. Up to 1803 conditions per place. [2024-06-21 19:03:14,708 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 19:03:14,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-21 19:03:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:03:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:03:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-21 19:03:14,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-21 19:03:14,713 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 97 transitions. [2024-06-21 19:03:14,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-21 19:03:14,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:03:14,716 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 19:03:14,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 19:03:14,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 19:03:14,717 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 19:03:14,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:14,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:14,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:14,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:03:14,721 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 19:03:14,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:14,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1325828590, now seen corresponding path program 1 times [2024-06-21 19:03:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:14,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790755503] [2024-06-21 19:03:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:14,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790755503] [2024-06-21 19:03:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790755503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:15,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:03:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030883731] [2024-06-21 19:03:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:03:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:03:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:03:15,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:03:15,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:15,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:15,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:03:15,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:16,326 INFO L124 PetriNetUnfolderBase]: 1545/2373 cut-off events. [2024-06-21 19:03:16,327 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-21 19:03:16,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5945 conditions, 2373 events. 1545/2373 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11561 event pairs, 575 based on Foata normal form. 6/2348 useless extension candidates. Maximal degree in co-relation 5931. Up to 2233 conditions per place. [2024-06-21 19:03:16,342 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 19:03:16,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 352 flow [2024-06-21 19:03:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:03:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:03:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 19:03:16,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 19:03:16,348 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-21 19:03:16,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 352 flow [2024-06-21 19:03:16,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 332 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 19:03:16,352 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 19:03:16,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 19:03:16,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 19:03:16,354 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 19:03:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:03:16,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:16,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1679440002, now seen corresponding path program 1 times [2024-06-21 19:03:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:16,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355821660] [2024-06-21 19:03:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:16,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:17,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355821660] [2024-06-21 19:03:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355821660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:17,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:03:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049966401] [2024-06-21 19:03:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:03:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:03:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:03:17,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:03:17,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:17,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:17,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:03:17,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:18,253 INFO L124 PetriNetUnfolderBase]: 1333/2129 cut-off events. [2024-06-21 19:03:18,253 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-06-21 19:03:18,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 2129 events. 1333/2129 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10631 event pairs, 592 based on Foata normal form. 2/2100 useless extension candidates. Maximal degree in co-relation 5766. Up to 1980 conditions per place. [2024-06-21 19:03:18,269 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 42 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2024-06-21 19:03:18,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 336 flow [2024-06-21 19:03:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:03:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:03:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 19:03:18,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 19:03:18,271 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 96 transitions. [2024-06-21 19:03:18,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 336 flow [2024-06-21 19:03:18,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 307 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:18,278 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 218 flow [2024-06-21 19:03:18,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-21 19:03:18,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-21 19:03:18,280 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 218 flow [2024-06-21 19:03:18,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:18,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:18,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:18,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:03:18,281 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 19:03:18,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash -523030790, now seen corresponding path program 1 times [2024-06-21 19:03:18,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:18,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217013696] [2024-06-21 19:03:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:18,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:19,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:19,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217013696] [2024-06-21 19:03:19,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217013696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:19,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:03:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478573893] [2024-06-21 19:03:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:03:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:03:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:03:19,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:03:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:03:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:20,432 INFO L124 PetriNetUnfolderBase]: 1323/2159 cut-off events. [2024-06-21 19:03:20,432 INFO L125 PetriNetUnfolderBase]: For 3044/3044 co-relation queries the response was YES. [2024-06-21 19:03:20,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6238 conditions, 2159 events. 1323/2159 cut-off events. For 3044/3044 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11068 event pairs, 556 based on Foata normal form. 4/2154 useless extension candidates. Maximal degree in co-relation 6217. Up to 1948 conditions per place. [2024-06-21 19:03:20,448 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 47 selfloop transitions, 13 changer transitions 0/66 dead transitions. [2024-06-21 19:03:20,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 394 flow [2024-06-21 19:03:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:03:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:03:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:03:20,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:03:20,450 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 218 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:03:20,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 394 flow [2024-06-21 19:03:20,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:03:20,459 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 262 flow [2024-06-21 19:03:20,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-21 19:03:20,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 19:03:20,462 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 262 flow [2024-06-21 19:03:20,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:20,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:20,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:20,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:03:20,463 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 19:03:20,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 239848209, now seen corresponding path program 1 times [2024-06-21 19:03:20,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:20,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444596638] [2024-06-21 19:03:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:21,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444596638] [2024-06-21 19:03:21,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444596638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:21,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:21,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:03:21,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814713994] [2024-06-21 19:03:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:21,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:03:21,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:03:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:03:21,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:21,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 262 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 19:03:21,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:21,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:22,635 INFO L124 PetriNetUnfolderBase]: 1569/2434 cut-off events. [2024-06-21 19:03:22,635 INFO L125 PetriNetUnfolderBase]: For 5125/5129 co-relation queries the response was YES. [2024-06-21 19:03:22,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7785 conditions, 2434 events. 1569/2434 cut-off events. For 5125/5129 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11921 event pairs, 661 based on Foata normal form. 6/2430 useless extension candidates. Maximal degree in co-relation 7761. Up to 2269 conditions per place. [2024-06-21 19:03:22,653 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-06-21 19:03:22,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 592 flow [2024-06-21 19:03:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:03:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:03:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 19:03:22,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:03:22,655 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 262 flow. Second operand 6 states and 117 transitions. [2024-06-21 19:03:22,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 592 flow [2024-06-21 19:03:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 562 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 19:03:22,661 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 396 flow [2024-06-21 19:03:22,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-21 19:03:22,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 19:03:22,664 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 396 flow [2024-06-21 19:03:22,665 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 19:03:22,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:22,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:22,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:03:22,665 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 19:03:22,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 990039219, now seen corresponding path program 2 times [2024-06-21 19:03:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:22,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042913551] [2024-06-21 19:03:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:24,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:24,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042913551] [2024-06-21 19:03:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042913551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:24,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:24,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:03:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187146116] [2024-06-21 19:03:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:24,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:03:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:03:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:03:24,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:24,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 396 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 19:03:24,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:24,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:24,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:24,796 INFO L124 PetriNetUnfolderBase]: 1564/2427 cut-off events. [2024-06-21 19:03:24,797 INFO L125 PetriNetUnfolderBase]: For 6943/6945 co-relation queries the response was YES. [2024-06-21 19:03:24,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8368 conditions, 2427 events. 1564/2427 cut-off events. For 6943/6945 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11837 event pairs, 658 based on Foata normal form. 4/2421 useless extension candidates. Maximal degree in co-relation 8340. Up to 2264 conditions per place. [2024-06-21 19:03:24,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 51 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-21 19:03:24,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 612 flow [2024-06-21 19:03:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:03:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:03:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 19:03:24,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 19:03:24,816 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 396 flow. Second operand 6 states and 113 transitions. [2024-06-21 19:03:24,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 612 flow [2024-06-21 19:03:24,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 592 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 19:03:24,827 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 436 flow [2024-06-21 19:03:24,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-21 19:03:24,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 19:03:24,828 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 436 flow [2024-06-21 19:03:24,828 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 19:03:24,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:24,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:24,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:03:24,828 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 19:03:24,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash 746043025, now seen corresponding path program 3 times [2024-06-21 19:03:24,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:24,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498250458] [2024-06-21 19:03:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:25,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498250458] [2024-06-21 19:03:25,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498250458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:25,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:25,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:03:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608402036] [2024-06-21 19:03:25,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:03:25,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:03:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:03:25,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:25,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 436 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 19:03:25,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:25,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:25,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:26,531 INFO L124 PetriNetUnfolderBase]: 1587/2462 cut-off events. [2024-06-21 19:03:26,532 INFO L125 PetriNetUnfolderBase]: For 8369/8375 co-relation queries the response was YES. [2024-06-21 19:03:26,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8724 conditions, 2462 events. 1587/2462 cut-off events. For 8369/8375 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12003 event pairs, 656 based on Foata normal form. 8/2460 useless extension candidates. Maximal degree in co-relation 8691. Up to 2288 conditions per place. [2024-06-21 19:03:26,548 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 56 selfloop transitions, 37 changer transitions 0/98 dead transitions. [2024-06-21 19:03:26,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 795 flow [2024-06-21 19:03:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 19:03:26,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 19:03:26,550 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 436 flow. Second operand 7 states and 130 transitions. [2024-06-21 19:03:26,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 795 flow [2024-06-21 19:03:26,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 720 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:26,559 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 598 flow [2024-06-21 19:03:26,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-21 19:03:26,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 19:03:26,560 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 598 flow [2024-06-21 19:03:26,560 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 19:03:26,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:26,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:26,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:03:26,560 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 19:03:26,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1917854085, now seen corresponding path program 1 times [2024-06-21 19:03:26,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:26,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616173673] [2024-06-21 19:03:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:26,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:28,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:28,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616173673] [2024-06-21 19:03:28,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616173673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:28,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:28,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:28,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152465382] [2024-06-21 19:03:28,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:28,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:28,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:28,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:28,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:28,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 598 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:28,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:28,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:28,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:29,094 INFO L124 PetriNetUnfolderBase]: 1610/2501 cut-off events. [2024-06-21 19:03:29,095 INFO L125 PetriNetUnfolderBase]: For 10259/10259 co-relation queries the response was YES. [2024-06-21 19:03:29,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9158 conditions, 2501 events. 1610/2501 cut-off events. For 10259/10259 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12206 event pairs, 628 based on Foata normal form. 2/2492 useless extension candidates. Maximal degree in co-relation 9122. Up to 2329 conditions per place. [2024-06-21 19:03:29,113 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-21 19:03:29,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 912 flow [2024-06-21 19:03:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:03:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 19:03:29,114 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 598 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:03:29,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 912 flow [2024-06-21 19:03:29,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 853 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 19:03:29,126 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 660 flow [2024-06-21 19:03:29,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=660, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2024-06-21 19:03:29,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 19:03:29,127 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 660 flow [2024-06-21 19:03:29,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:29,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:29,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:29,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:03:29,128 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 19:03:29,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1154638393, now seen corresponding path program 1 times [2024-06-21 19:03:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:29,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133438316] [2024-06-21 19:03:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:29,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:30,654 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 19:03:30,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:30,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133438316] [2024-06-21 19:03:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133438316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:30,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:30,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855158855] [2024-06-21 19:03:30,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:30,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:30,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:30,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 660 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:30,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:30,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:30,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:31,461 INFO L124 PetriNetUnfolderBase]: 1664/2583 cut-off events. [2024-06-21 19:03:31,461 INFO L125 PetriNetUnfolderBase]: For 13538/13540 co-relation queries the response was YES. [2024-06-21 19:03:31,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9995 conditions, 2583 events. 1664/2583 cut-off events. For 13538/13540 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12615 event pairs, 595 based on Foata normal form. 6/2575 useless extension candidates. Maximal degree in co-relation 9958. Up to 2297 conditions per place. [2024-06-21 19:03:31,481 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 44 changer transitions 0/121 dead transitions. [2024-06-21 19:03:31,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 1110 flow [2024-06-21 19:03:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 19:03:31,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 19:03:31,483 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 660 flow. Second operand 7 states and 138 transitions. [2024-06-21 19:03:31,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 1110 flow [2024-06-21 19:03:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 1054 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:31,547 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 782 flow [2024-06-21 19:03:31,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=782, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2024-06-21 19:03:31,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 19:03:31,549 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 782 flow [2024-06-21 19:03:31,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:31,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:31,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:31,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:03:31,550 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 19:03:31,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1154638579, now seen corresponding path program 2 times [2024-06-21 19:03:31,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532333354] [2024-06-21 19:03:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:32,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:32,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532333354] [2024-06-21 19:03:32,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532333354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:32,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:32,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410760960] [2024-06-21 19:03:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:32,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:33,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:33,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 782 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:33,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:33,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:33,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:33,707 INFO L124 PetriNetUnfolderBase]: 1691/2624 cut-off events. [2024-06-21 19:03:33,708 INFO L125 PetriNetUnfolderBase]: For 16988/16992 co-relation queries the response was YES. [2024-06-21 19:03:33,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 2624 events. 1691/2624 cut-off events. For 16988/16992 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12855 event pairs, 620 based on Foata normal form. 6/2617 useless extension candidates. Maximal degree in co-relation 10750. Up to 2356 conditions per place. [2024-06-21 19:03:33,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 48 changer transitions 0/128 dead transitions. [2024-06-21 19:03:33,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1276 flow [2024-06-21 19:03:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 19:03:33,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 19:03:33,730 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 782 flow. Second operand 7 states and 137 transitions. [2024-06-21 19:03:33,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1276 flow [2024-06-21 19:03:33,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1234 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:33,747 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 950 flow [2024-06-21 19:03:33,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=950, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-21 19:03:33,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 19:03:33,748 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 950 flow [2024-06-21 19:03:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:33,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:33,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:03:33,749 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 19:03:33,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 626446437, now seen corresponding path program 2 times [2024-06-21 19:03:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339499405] [2024-06-21 19:03:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339499405] [2024-06-21 19:03:35,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339499405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:35,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:35,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544041118] [2024-06-21 19:03:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:35,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:35,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:35,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 950 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:35,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:35,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:36,103 INFO L124 PetriNetUnfolderBase]: 1713/2657 cut-off events. [2024-06-21 19:03:36,103 INFO L125 PetriNetUnfolderBase]: For 20712/20716 co-relation queries the response was YES. [2024-06-21 19:03:36,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11586 conditions, 2657 events. 1713/2657 cut-off events. For 20712/20716 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12930 event pairs, 623 based on Foata normal form. 8/2652 useless extension candidates. Maximal degree in co-relation 11544. Up to 2355 conditions per place. [2024-06-21 19:03:36,122 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 47 changer transitions 0/134 dead transitions. [2024-06-21 19:03:36,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1406 flow [2024-06-21 19:03:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:03:36,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 19:03:36,125 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 950 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:03:36,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1406 flow [2024-06-21 19:03:36,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1374 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 19:03:36,144 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 1053 flow [2024-06-21 19:03:36,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-21 19:03:36,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 19:03:36,145 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 1053 flow [2024-06-21 19:03:36,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:36,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:36,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:36,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:03:36,146 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 19:03:36,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash -977507059, now seen corresponding path program 3 times [2024-06-21 19:03:36,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:36,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142572375] [2024-06-21 19:03:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:37,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:37,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142572375] [2024-06-21 19:03:37,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142572375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:37,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:37,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:37,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415594984] [2024-06-21 19:03:37,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:37,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:37,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:37,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:37,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 1053 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:37,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:37,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:37,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:38,380 INFO L124 PetriNetUnfolderBase]: 1708/2645 cut-off events. [2024-06-21 19:03:38,380 INFO L125 PetriNetUnfolderBase]: For 23729/23729 co-relation queries the response was YES. [2024-06-21 19:03:38,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11944 conditions, 2645 events. 1708/2645 cut-off events. For 23729/23729 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12908 event pairs, 622 based on Foata normal form. 2/2634 useless extension candidates. Maximal degree in co-relation 11898. Up to 2383 conditions per place. [2024-06-21 19:03:38,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 49 changer transitions 0/128 dead transitions. [2024-06-21 19:03:38,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 128 transitions, 1413 flow [2024-06-21 19:03:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:03:38,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 19:03:38,404 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 1053 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:03:38,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 128 transitions, 1413 flow [2024-06-21 19:03:38,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1338 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:38,430 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 1087 flow [2024-06-21 19:03:38,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-21 19:03:38,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 19:03:38,431 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 1087 flow [2024-06-21 19:03:38,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:38,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:38,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:38,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:03:38,432 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 19:03:38,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash -121368423, now seen corresponding path program 3 times [2024-06-21 19:03:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:38,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192188003] [2024-06-21 19:03:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:39,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192188003] [2024-06-21 19:03:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192188003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:39,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:39,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:39,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855270253] [2024-06-21 19:03:39,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:39,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:39,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:39,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:39,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 1087 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:39,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:39,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:39,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:40,579 INFO L124 PetriNetUnfolderBase]: 1698/2636 cut-off events. [2024-06-21 19:03:40,579 INFO L125 PetriNetUnfolderBase]: For 26101/26105 co-relation queries the response was YES. [2024-06-21 19:03:40,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12045 conditions, 2636 events. 1698/2636 cut-off events. For 26101/26105 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12882 event pairs, 573 based on Foata normal form. 8/2631 useless extension candidates. Maximal degree in co-relation 11996. Up to 2340 conditions per place. [2024-06-21 19:03:40,597 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 51 changer transitions 0/130 dead transitions. [2024-06-21 19:03:40,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1457 flow [2024-06-21 19:03:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:03:40,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 19:03:40,601 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 1087 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:03:40,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1457 flow [2024-06-21 19:03:40,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 1350 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:03:40,637 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 1092 flow [2024-06-21 19:03:40,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-21 19:03:40,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 19:03:40,638 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 1092 flow [2024-06-21 19:03:40,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:40,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:40,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:03:40,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:40,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1652378859, now seen corresponding path program 4 times [2024-06-21 19:03:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598251319] [2024-06-21 19:03:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:41,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598251319] [2024-06-21 19:03:41,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598251319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:41,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:41,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340121385] [2024-06-21 19:03:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:41,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:41,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 1092 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:41,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:41,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:41,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:42,414 INFO L124 PetriNetUnfolderBase]: 1742/2706 cut-off events. [2024-06-21 19:03:42,414 INFO L125 PetriNetUnfolderBase]: For 29231/29233 co-relation queries the response was YES. [2024-06-21 19:03:42,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12602 conditions, 2706 events. 1742/2706 cut-off events. For 29231/29233 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13286 event pairs, 609 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 12551. Up to 2507 conditions per place. [2024-06-21 19:03:42,427 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 40 changer transitions 0/149 dead transitions. [2024-06-21 19:03:42,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 1597 flow [2024-06-21 19:03:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:03:42,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 19:03:42,429 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 1092 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:03:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 1597 flow [2024-06-21 19:03:42,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 1508 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:03:42,465 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 1264 flow [2024-06-21 19:03:42,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1264, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2024-06-21 19:03:42,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 19:03:42,466 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 1264 flow [2024-06-21 19:03:42,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:42,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:42,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:42,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:03:42,467 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 19:03:42,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1682450567, now seen corresponding path program 5 times [2024-06-21 19:03:42,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:42,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180258402] [2024-06-21 19:03:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:42,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180258402] [2024-06-21 19:03:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180258402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:43,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:43,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:43,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877550773] [2024-06-21 19:03:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:44,132 INFO L124 PetriNetUnfolderBase]: 1788/2780 cut-off events. [2024-06-21 19:03:44,132 INFO L125 PetriNetUnfolderBase]: For 33254/33258 co-relation queries the response was YES. [2024-06-21 19:03:44,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13249 conditions, 2780 events. 1788/2780 cut-off events. For 33254/33258 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13724 event pairs, 609 based on Foata normal form. 6/2773 useless extension candidates. Maximal degree in co-relation 13195. Up to 2539 conditions per place. [2024-06-21 19:03:44,146 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 63 changer transitions 0/175 dead transitions. [2024-06-21 19:03:44,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 175 transitions, 1940 flow [2024-06-21 19:03:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:03:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:03:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 19:03:44,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 19:03:44,148 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 1264 flow. Second operand 10 states and 176 transitions. [2024-06-21 19:03:44,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 175 transitions, 1940 flow [2024-06-21 19:03:44,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 175 transitions, 1834 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:44,191 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1576 flow [2024-06-21 19:03:44,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1576, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-06-21 19:03:44,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 19:03:44,192 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1576 flow [2024-06-21 19:03:44,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:44,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:44,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:44,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:03:44,192 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 19:03:44,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:44,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1150564583, now seen corresponding path program 4 times [2024-06-21 19:03:44,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:44,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198738148] [2024-06-21 19:03:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:44,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:45,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198738148] [2024-06-21 19:03:45,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198738148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:45,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:45,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569699460] [2024-06-21 19:03:45,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:45,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:45,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:45,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1576 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:45,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:45,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:45,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:46,154 INFO L124 PetriNetUnfolderBase]: 1834/2855 cut-off events. [2024-06-21 19:03:46,155 INFO L125 PetriNetUnfolderBase]: For 37858/37860 co-relation queries the response was YES. [2024-06-21 19:03:46,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 2855 events. 1834/2855 cut-off events. For 37858/37860 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14162 event pairs, 636 based on Foata normal form. 6/2847 useless extension candidates. Maximal degree in co-relation 13829. Up to 2514 conditions per place. [2024-06-21 19:03:46,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 61 changer transitions 0/185 dead transitions. [2024-06-21 19:03:46,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 185 transitions, 2154 flow [2024-06-21 19:03:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 19:03:46,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 19:03:46,170 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1576 flow. Second operand 8 states and 153 transitions. [2024-06-21 19:03:46,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 185 transitions, 2154 flow [2024-06-21 19:03:46,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 1987 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 19:03:46,203 INFO L231 Difference]: Finished difference. Result has 113 places, 157 transitions, 1683 flow [2024-06-21 19:03:46,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1683, PETRI_PLACES=113, PETRI_TRANSITIONS=157} [2024-06-21 19:03:46,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-21 19:03:46,204 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 157 transitions, 1683 flow [2024-06-21 19:03:46,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:46,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:46,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:03:46,205 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 19:03:46,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1173801749, now seen corresponding path program 6 times [2024-06-21 19:03:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:46,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116253635] [2024-06-21 19:03:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:47,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116253635] [2024-06-21 19:03:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116253635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:47,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:47,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:47,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010199456] [2024-06-21 19:03:47,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:47,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:47,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:47,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:47,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 157 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:47,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:47,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:47,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:48,006 INFO L124 PetriNetUnfolderBase]: 1850/2876 cut-off events. [2024-06-21 19:03:48,006 INFO L125 PetriNetUnfolderBase]: For 41039/41041 co-relation queries the response was YES. [2024-06-21 19:03:48,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14262 conditions, 2876 events. 1850/2876 cut-off events. For 41039/41041 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14240 event pairs, 674 based on Foata normal form. 4/2867 useless extension candidates. Maximal degree in co-relation 14205. Up to 2541 conditions per place. [2024-06-21 19:03:48,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 93 selfloop transitions, 94 changer transitions 0/192 dead transitions. [2024-06-21 19:03:48,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 192 transitions, 2266 flow [2024-06-21 19:03:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 19:03:48,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 19:03:48,025 INFO L175 Difference]: Start difference. First operand has 113 places, 157 transitions, 1683 flow. Second operand 8 states and 149 transitions. [2024-06-21 19:03:48,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 192 transitions, 2266 flow [2024-06-21 19:03:48,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 2124 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:48,066 INFO L231 Difference]: Finished difference. Result has 119 places, 168 transitions, 1885 flow [2024-06-21 19:03:48,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1885, PETRI_PLACES=119, PETRI_TRANSITIONS=168} [2024-06-21 19:03:48,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 19:03:48,067 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 168 transitions, 1885 flow [2024-06-21 19:03:48,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:48,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:48,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:48,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:03:48,067 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 19:03:48,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 626692515, now seen corresponding path program 1 times [2024-06-21 19:03:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:48,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778244444] [2024-06-21 19:03:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778244444] [2024-06-21 19:03:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778244444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:50,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:50,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:50,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106736323] [2024-06-21 19:03:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:50,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:50,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:50,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 168 transitions, 1885 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 19:03:50,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:50,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:50,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:50,980 INFO L124 PetriNetUnfolderBase]: 1842/2865 cut-off events. [2024-06-21 19:03:50,980 INFO L125 PetriNetUnfolderBase]: For 45336/45336 co-relation queries the response was YES. [2024-06-21 19:03:50,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14402 conditions, 2865 events. 1842/2865 cut-off events. For 45336/45336 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14204 event pairs, 661 based on Foata normal form. 4/2854 useless extension candidates. Maximal degree in co-relation 14342. Up to 2679 conditions per place. [2024-06-21 19:03:50,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 15 changer transitions 0/190 dead transitions. [2024-06-21 19:03:50,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 190 transitions, 2373 flow [2024-06-21 19:03:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:03:50,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:03:50,996 INFO L175 Difference]: Start difference. First operand has 119 places, 168 transitions, 1885 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:03:50,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 190 transitions, 2373 flow [2024-06-21 19:03:51,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 2207 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 19:03:51,024 INFO L231 Difference]: Finished difference. Result has 123 places, 170 transitions, 1788 flow [2024-06-21 19:03:51,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1788, PETRI_PLACES=123, PETRI_TRANSITIONS=170} [2024-06-21 19:03:51,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 19:03:51,025 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 170 transitions, 1788 flow [2024-06-21 19:03:51,025 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 19:03:51,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:51,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:51,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:03:51,025 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:51,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2131044602, now seen corresponding path program 1 times [2024-06-21 19:03:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:51,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029387208] [2024-06-21 19:03:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:51,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:52,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:52,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029387208] [2024-06-21 19:03:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029387208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:52,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:52,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:03:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522852484] [2024-06-21 19:03:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:03:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:03:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:03:52,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:03:52,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 170 transitions, 1788 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 19:03:52,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:52,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:03:52,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:52,482 INFO L124 PetriNetUnfolderBase]: 1484/2475 cut-off events. [2024-06-21 19:03:52,482 INFO L125 PetriNetUnfolderBase]: For 41571/41572 co-relation queries the response was YES. [2024-06-21 19:03:52,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12335 conditions, 2475 events. 1484/2475 cut-off events. For 41571/41572 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 13282 event pairs, 593 based on Foata normal form. 2/2453 useless extension candidates. Maximal degree in co-relation 12274. Up to 2188 conditions per place. [2024-06-21 19:03:52,497 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2024-06-21 19:03:52,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 180 transitions, 2146 flow [2024-06-21 19:03:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:03:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:03:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 19:03:52,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 19:03:52,498 INFO L175 Difference]: Start difference. First operand has 123 places, 170 transitions, 1788 flow. Second operand 5 states and 96 transitions. [2024-06-21 19:03:52,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 180 transitions, 2146 flow [2024-06-21 19:03:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 180 transitions, 2088 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:03:52,532 INFO L231 Difference]: Finished difference. Result has 122 places, 173 transitions, 1782 flow [2024-06-21 19:03:52,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1782, PETRI_PLACES=122, PETRI_TRANSITIONS=173} [2024-06-21 19:03:52,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 19:03:52,533 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 173 transitions, 1782 flow [2024-06-21 19:03:52,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 19:03:52,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:52,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:52,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:03:52,533 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:52,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1437774931, now seen corresponding path program 1 times [2024-06-21 19:03:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:52,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756386577] [2024-06-21 19:03:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:54,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756386577] [2024-06-21 19:03:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756386577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:54,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634090718] [2024-06-21 19:03:54,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:54,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:54,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:54,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 173 transitions, 1782 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 19:03:54,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:54,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:54,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:55,097 INFO L124 PetriNetUnfolderBase]: 1861/2889 cut-off events. [2024-06-21 19:03:55,097 INFO L125 PetriNetUnfolderBase]: For 52970/52970 co-relation queries the response was YES. [2024-06-21 19:03:55,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15011 conditions, 2889 events. 1861/2889 cut-off events. For 52970/52970 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14258 event pairs, 560 based on Foata normal form. 4/2892 useless extension candidates. Maximal degree in co-relation 14951. Up to 2642 conditions per place. [2024-06-21 19:03:55,113 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2024-06-21 19:03:55,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2284 flow [2024-06-21 19:03:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:03:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:03:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:03:55,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:03:55,117 INFO L175 Difference]: Start difference. First operand has 122 places, 173 transitions, 1782 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:03:55,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2284 flow [2024-06-21 19:03:55,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 198 transitions, 2254 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 19:03:55,150 INFO L231 Difference]: Finished difference. Result has 128 places, 176 transitions, 1905 flow [2024-06-21 19:03:55,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1905, PETRI_PLACES=128, PETRI_TRANSITIONS=176} [2024-06-21 19:03:55,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 19:03:55,151 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 176 transitions, 1905 flow [2024-06-21 19:03:55,151 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 19:03:55,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:55,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:55,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:03:55,151 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 19:03:55,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1434055861, now seen corresponding path program 2 times [2024-06-21 19:03:55,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:55,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389422654] [2024-06-21 19:03:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:55,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389422654] [2024-06-21 19:03:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389422654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572871827] [2024-06-21 19:03:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:56,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:56,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:56,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 176 transitions, 1905 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 19:03:56,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:56,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:56,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:57,547 INFO L124 PetriNetUnfolderBase]: 1947/3038 cut-off events. [2024-06-21 19:03:57,547 INFO L125 PetriNetUnfolderBase]: For 61053/61053 co-relation queries the response was YES. [2024-06-21 19:03:57,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16531 conditions, 3038 events. 1947/3038 cut-off events. For 61053/61053 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15292 event pairs, 490 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 16470. Up to 2348 conditions per place. [2024-06-21 19:03:57,565 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 107 changer transitions 0/225 dead transitions. [2024-06-21 19:03:57,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 225 transitions, 2926 flow [2024-06-21 19:03:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 19:03:57,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 19:03:57,567 INFO L175 Difference]: Start difference. First operand has 128 places, 176 transitions, 1905 flow. Second operand 8 states and 164 transitions. [2024-06-21 19:03:57,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 225 transitions, 2926 flow [2024-06-21 19:03:57,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 225 transitions, 2803 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:03:57,610 INFO L231 Difference]: Finished difference. Result has 129 places, 188 transitions, 2182 flow [2024-06-21 19:03:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2182, PETRI_PLACES=129, PETRI_TRANSITIONS=188} [2024-06-21 19:03:57,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 19:03:57,610 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 188 transitions, 2182 flow [2024-06-21 19:03:57,611 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 19:03:57,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:57,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:03:57,611 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 19:03:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1434050281, now seen corresponding path program 3 times [2024-06-21 19:03:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032028233] [2024-06-21 19:03:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:59,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:59,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032028233] [2024-06-21 19:03:59,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032028233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:59,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:59,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:59,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961539695] [2024-06-21 19:03:59,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:59,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:59,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:59,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:59,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:59,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:59,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 188 transitions, 2182 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 19:03:59,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:59,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:59,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:59,981 INFO L124 PetriNetUnfolderBase]: 1937/3024 cut-off events. [2024-06-21 19:03:59,982 INFO L125 PetriNetUnfolderBase]: For 67252/67252 co-relation queries the response was YES. [2024-06-21 19:03:59,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17067 conditions, 3024 events. 1937/3024 cut-off events. For 67252/67252 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15153 event pairs, 490 based on Foata normal form. 4/3026 useless extension candidates. Maximal degree in co-relation 17004. Up to 2340 conditions per place. [2024-06-21 19:04:00,003 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 105 selfloop transitions, 111 changer transitions 0/221 dead transitions. [2024-06-21 19:04:00,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 221 transitions, 2935 flow [2024-06-21 19:04:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:04:00,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 19:04:00,006 INFO L175 Difference]: Start difference. First operand has 129 places, 188 transitions, 2182 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:04:00,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 221 transitions, 2935 flow [2024-06-21 19:04:00,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 221 transitions, 2868 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-21 19:04:00,055 INFO L231 Difference]: Finished difference. Result has 136 places, 188 transitions, 2349 flow [2024-06-21 19:04:00,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2349, PETRI_PLACES=136, PETRI_TRANSITIONS=188} [2024-06-21 19:04:00,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 19:04:00,056 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 188 transitions, 2349 flow [2024-06-21 19:04:00,056 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 19:04:00,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:00,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:00,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:04:00,057 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 19:04:00,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:00,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2047643749, now seen corresponding path program 4 times [2024-06-21 19:04:00,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:00,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291986306] [2024-06-21 19:04:00,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:00,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291986306] [2024-06-21 19:04:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291986306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:01,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451521660] [2024-06-21 19:04:01,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:01,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:01,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 188 transitions, 2349 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 19:04:01,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:01,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:01,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:02,520 INFO L124 PetriNetUnfolderBase]: 1959/3064 cut-off events. [2024-06-21 19:04:02,520 INFO L125 PetriNetUnfolderBase]: For 73642/73642 co-relation queries the response was YES. [2024-06-21 19:04:02,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17802 conditions, 3064 events. 1959/3064 cut-off events. For 73642/73642 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 15417 event pairs, 510 based on Foata normal form. 4/3067 useless extension candidates. Maximal degree in co-relation 17735. Up to 2359 conditions per place. [2024-06-21 19:04:02,540 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 127 changer transitions 0/218 dead transitions. [2024-06-21 19:04:02,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 218 transitions, 3032 flow [2024-06-21 19:04:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 19:04:02,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 19:04:02,542 INFO L175 Difference]: Start difference. First operand has 136 places, 188 transitions, 2349 flow. Second operand 8 states and 153 transitions. [2024-06-21 19:04:02,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 218 transitions, 3032 flow [2024-06-21 19:04:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 218 transitions, 2798 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:02,587 INFO L231 Difference]: Finished difference. Result has 139 places, 191 transitions, 2434 flow [2024-06-21 19:04:02,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2434, PETRI_PLACES=139, PETRI_TRANSITIONS=191} [2024-06-21 19:04:02,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 19:04:02,588 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 191 transitions, 2434 flow [2024-06-21 19:04:02,588 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 19:04:02,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:02,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:04:02,588 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:02,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash 820107489, now seen corresponding path program 5 times [2024-06-21 19:04:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:02,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279078685] [2024-06-21 19:04:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:04,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:04,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279078685] [2024-06-21 19:04:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279078685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:04,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:04,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685407199] [2024-06-21 19:04:04,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:04,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:04,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 191 transitions, 2434 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 19:04:04,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:04,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:04,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:05,028 INFO L124 PetriNetUnfolderBase]: 1981/3095 cut-off events. [2024-06-21 19:04:05,028 INFO L125 PetriNetUnfolderBase]: For 79209/79209 co-relation queries the response was YES. [2024-06-21 19:04:05,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18306 conditions, 3095 events. 1981/3095 cut-off events. For 79209/79209 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15606 event pairs, 505 based on Foata normal form. 4/3098 useless extension candidates. Maximal degree in co-relation 18236. Up to 2378 conditions per place. [2024-06-21 19:04:05,050 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 109 selfloop transitions, 114 changer transitions 0/228 dead transitions. [2024-06-21 19:04:05,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 228 transitions, 3288 flow [2024-06-21 19:04:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 19:04:05,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 19:04:05,051 INFO L175 Difference]: Start difference. First operand has 139 places, 191 transitions, 2434 flow. Second operand 8 states and 158 transitions. [2024-06-21 19:04:05,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 228 transitions, 3288 flow [2024-06-21 19:04:05,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 3091 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:05,114 INFO L231 Difference]: Finished difference. Result has 142 places, 194 transitions, 2530 flow [2024-06-21 19:04:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=142, PETRI_TRANSITIONS=194} [2024-06-21 19:04:05,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 19:04:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 194 transitions, 2530 flow [2024-06-21 19:04:05,114 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 19:04:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:05,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:04:05,115 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 19:04:05,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 525190487, now seen corresponding path program 6 times [2024-06-21 19:04:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460661433] [2024-06-21 19:04:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460661433] [2024-06-21 19:04:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460661433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:06,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:06,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:06,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140792585] [2024-06-21 19:04:06,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:06,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:06,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:06,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 194 transitions, 2530 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 19:04:06,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:06,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:06,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:07,477 INFO L124 PetriNetUnfolderBase]: 1971/3081 cut-off events. [2024-06-21 19:04:07,477 INFO L125 PetriNetUnfolderBase]: For 83782/83782 co-relation queries the response was YES. [2024-06-21 19:04:07,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18265 conditions, 3081 events. 1971/3081 cut-off events. For 83782/83782 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15467 event pairs, 503 based on Foata normal form. 4/3084 useless extension candidates. Maximal degree in co-relation 18193. Up to 2370 conditions per place. [2024-06-21 19:04:07,499 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 103 selfloop transitions, 116 changer transitions 0/224 dead transitions. [2024-06-21 19:04:07,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 224 transitions, 3207 flow [2024-06-21 19:04:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 19:04:07,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 19:04:07,500 INFO L175 Difference]: Start difference. First operand has 142 places, 194 transitions, 2530 flow. Second operand 8 states and 155 transitions. [2024-06-21 19:04:07,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 224 transitions, 3207 flow [2024-06-21 19:04:07,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 3021 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 19:04:07,567 INFO L231 Difference]: Finished difference. Result has 147 places, 194 transitions, 2587 flow [2024-06-21 19:04:07,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2587, PETRI_PLACES=147, PETRI_TRANSITIONS=194} [2024-06-21 19:04:07,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 19:04:07,568 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 194 transitions, 2587 flow [2024-06-21 19:04:07,568 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 19:04:07,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:07,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:07,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:04:07,568 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 19:04:07,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1099613693, now seen corresponding path program 7 times [2024-06-21 19:04:07,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:07,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277721829] [2024-06-21 19:04:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:07,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277721829] [2024-06-21 19:04:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277721829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:08,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715736809] [2024-06-21 19:04:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:08,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:08,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 194 transitions, 2587 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 19:04:08,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:08,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:08,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:09,587 INFO L124 PetriNetUnfolderBase]: 2073/3236 cut-off events. [2024-06-21 19:04:09,587 INFO L125 PetriNetUnfolderBase]: For 94589/94591 co-relation queries the response was YES. [2024-06-21 19:04:09,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 3236 events. 2073/3236 cut-off events. For 94589/94591 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16448 event pairs, 621 based on Foata normal form. 6/3241 useless extension candidates. Maximal degree in co-relation 19356. Up to 2851 conditions per place. [2024-06-21 19:04:09,611 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 168 selfloop transitions, 78 changer transitions 0/251 dead transitions. [2024-06-21 19:04:09,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 251 transitions, 3629 flow [2024-06-21 19:04:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:04:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:04:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 19:04:09,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 19:04:09,612 INFO L175 Difference]: Start difference. First operand has 147 places, 194 transitions, 2587 flow. Second operand 11 states and 200 transitions. [2024-06-21 19:04:09,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 251 transitions, 3629 flow [2024-06-21 19:04:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 251 transitions, 3402 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:09,689 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2795 flow [2024-06-21 19:04:09,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2795, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-21 19:04:09,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 19:04:09,690 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2795 flow [2024-06-21 19:04:09,690 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 19:04:09,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:09,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:09,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:04:09,691 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 19:04:09,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1307911901, now seen corresponding path program 8 times [2024-06-21 19:04:09,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:09,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391683853] [2024-06-21 19:04:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:10,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:10,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391683853] [2024-06-21 19:04:10,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391683853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:10,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:10,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864980541] [2024-06-21 19:04:10,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:10,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:10,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:10,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2795 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 19:04:10,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:10,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:10,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:11,715 INFO L124 PetriNetUnfolderBase]: 2085/3260 cut-off events. [2024-06-21 19:04:11,715 INFO L125 PetriNetUnfolderBase]: For 99451/99453 co-relation queries the response was YES. [2024-06-21 19:04:11,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19530 conditions, 3260 events. 2085/3260 cut-off events. For 99451/99453 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16613 event pairs, 615 based on Foata normal form. 8/3267 useless extension candidates. Maximal degree in co-relation 19452. Up to 2945 conditions per place. [2024-06-21 19:04:11,736 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 178 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-21 19:04:11,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3485 flow [2024-06-21 19:04:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:04:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 19:04:11,738 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2795 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:04:11,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3485 flow [2024-06-21 19:04:11,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 244 transitions, 3337 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:11,833 INFO L231 Difference]: Finished difference. Result has 158 places, 216 transitions, 2906 flow [2024-06-21 19:04:11,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2906, PETRI_PLACES=158, PETRI_TRANSITIONS=216} [2024-06-21 19:04:11,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 19:04:11,833 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 216 transitions, 2906 flow [2024-06-21 19:04:11,833 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 19:04:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:11,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:11,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:04:11,834 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:11,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -132271527, now seen corresponding path program 9 times [2024-06-21 19:04:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657812344] [2024-06-21 19:04:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:11,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:13,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:13,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657812344] [2024-06-21 19:04:13,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657812344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:13,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:13,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765484674] [2024-06-21 19:04:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:13,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:13,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 216 transitions, 2906 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 19:04:13,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:13,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:13,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:14,059 INFO L124 PetriNetUnfolderBase]: 2205/3442 cut-off events. [2024-06-21 19:04:14,060 INFO L125 PetriNetUnfolderBase]: For 106191/106191 co-relation queries the response was YES. [2024-06-21 19:04:14,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20532 conditions, 3442 events. 2205/3442 cut-off events. For 106191/106191 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17683 event pairs, 552 based on Foata normal form. 4/3444 useless extension candidates. Maximal degree in co-relation 20452. Up to 2583 conditions per place. [2024-06-21 19:04:14,083 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 101 selfloop transitions, 171 changer transitions 0/277 dead transitions. [2024-06-21 19:04:14,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 277 transitions, 3975 flow [2024-06-21 19:04:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 19:04:14,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 19:04:14,084 INFO L175 Difference]: Start difference. First operand has 158 places, 216 transitions, 2906 flow. Second operand 9 states and 176 transitions. [2024-06-21 19:04:14,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 277 transitions, 3975 flow [2024-06-21 19:04:14,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 277 transitions, 3877 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:04:14,179 INFO L231 Difference]: Finished difference. Result has 162 places, 242 transitions, 3483 flow [2024-06-21 19:04:14,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3483, PETRI_PLACES=162, PETRI_TRANSITIONS=242} [2024-06-21 19:04:14,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 19:04:14,180 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 242 transitions, 3483 flow [2024-06-21 19:04:14,180 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 19:04:14,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:14,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:14,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:04:14,181 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 19:04:14,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1307767751, now seen corresponding path program 10 times [2024-06-21 19:04:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567917964] [2024-06-21 19:04:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:15,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:15,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567917964] [2024-06-21 19:04:15,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567917964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:15,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:15,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:15,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370878394] [2024-06-21 19:04:15,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:15,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:15,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:15,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:15,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 242 transitions, 3483 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 19:04:15,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:15,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:15,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:16,352 INFO L124 PetriNetUnfolderBase]: 2195/3428 cut-off events. [2024-06-21 19:04:16,352 INFO L125 PetriNetUnfolderBase]: For 113897/113897 co-relation queries the response was YES. [2024-06-21 19:04:16,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21308 conditions, 3428 events. 2195/3428 cut-off events. For 113897/113897 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17555 event pairs, 550 based on Foata normal form. 4/3430 useless extension candidates. Maximal degree in co-relation 21226. Up to 2575 conditions per place. [2024-06-21 19:04:16,377 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 106 selfloop transitions, 165 changer transitions 0/276 dead transitions. [2024-06-21 19:04:16,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 276 transitions, 4181 flow [2024-06-21 19:04:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 19:04:16,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 19:04:16,378 INFO L175 Difference]: Start difference. First operand has 162 places, 242 transitions, 3483 flow. Second operand 9 states and 176 transitions. [2024-06-21 19:04:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 276 transitions, 4181 flow [2024-06-21 19:04:16,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 276 transitions, 3696 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 19:04:16,492 INFO L231 Difference]: Finished difference. Result has 165 places, 242 transitions, 3350 flow [2024-06-21 19:04:16,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3350, PETRI_PLACES=165, PETRI_TRANSITIONS=242} [2024-06-21 19:04:16,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 19:04:16,493 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 242 transitions, 3350 flow [2024-06-21 19:04:16,493 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 19:04:16,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:16,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:04:16,494 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:16,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:16,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1667367378, now seen corresponding path program 1 times [2024-06-21 19:04:16,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:16,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514624233] [2024-06-21 19:04:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:16,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:17,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:17,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514624233] [2024-06-21 19:04:17,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514624233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:17,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:17,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:04:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862179823] [2024-06-21 19:04:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:04:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:04:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:04:17,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:04:17,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 242 transitions, 3350 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:17,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:17,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:04:17,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:17,949 INFO L124 PetriNetUnfolderBase]: 1997/3186 cut-off events. [2024-06-21 19:04:17,949 INFO L125 PetriNetUnfolderBase]: For 115022/115047 co-relation queries the response was YES. [2024-06-21 19:04:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 3186 events. 1997/3186 cut-off events. For 115022/115047 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16826 event pairs, 676 based on Foata normal form. 3/3143 useless extension candidates. Maximal degree in co-relation 20081. Up to 2921 conditions per place. [2024-06-21 19:04:18,027 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 13 changer transitions 0/253 dead transitions. [2024-06-21 19:04:18,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 253 transitions, 3864 flow [2024-06-21 19:04:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:04:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:04:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:04:18,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 19:04:18,029 INFO L175 Difference]: Start difference. First operand has 165 places, 242 transitions, 3350 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:04:18,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 253 transitions, 3864 flow [2024-06-21 19:04:18,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 253 transitions, 3426 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:04:18,121 INFO L231 Difference]: Finished difference. Result has 163 places, 245 transitions, 2974 flow [2024-06-21 19:04:18,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2974, PETRI_PLACES=163, PETRI_TRANSITIONS=245} [2024-06-21 19:04:18,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 19:04:18,122 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 245 transitions, 2974 flow [2024-06-21 19:04:18,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:18,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:18,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:04:18,123 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 19:04:18,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -627578110, now seen corresponding path program 1 times [2024-06-21 19:04:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:18,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342672662] [2024-06-21 19:04:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:19,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342672662] [2024-06-21 19:04:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342672662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:19,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:19,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373017361] [2024-06-21 19:04:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:19,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:19,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:19,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 245 transitions, 2974 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 19:04:19,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:19,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:19,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:20,819 INFO L124 PetriNetUnfolderBase]: 2272/3537 cut-off events. [2024-06-21 19:04:20,820 INFO L125 PetriNetUnfolderBase]: For 135309/135309 co-relation queries the response was YES. [2024-06-21 19:04:20,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 3537 events. 2272/3537 cut-off events. For 135309/135309 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18285 event pairs, 624 based on Foata normal form. 4/3540 useless extension candidates. Maximal degree in co-relation 22073. Up to 3211 conditions per place. [2024-06-21 19:04:20,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 49 changer transitions 0/269 dead transitions. [2024-06-21 19:04:20,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 269 transitions, 3620 flow [2024-06-21 19:04:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:04:20,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:04:20,845 INFO L175 Difference]: Start difference. First operand has 163 places, 245 transitions, 2974 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:04:20,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 269 transitions, 3620 flow [2024-06-21 19:04:20,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 269 transitions, 3580 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:20,948 INFO L231 Difference]: Finished difference. Result has 167 places, 247 transitions, 3082 flow [2024-06-21 19:04:20,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3082, PETRI_PLACES=167, PETRI_TRANSITIONS=247} [2024-06-21 19:04:20,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 19:04:20,949 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 247 transitions, 3082 flow [2024-06-21 19:04:20,949 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 19:04:20,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:20,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:20,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:04:20,949 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 19:04:20,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -630435070, now seen corresponding path program 2 times [2024-06-21 19:04:20,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:20,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928653831] [2024-06-21 19:04:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:20,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:22,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:22,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928653831] [2024-06-21 19:04:22,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928653831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:22,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:22,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:22,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851625660] [2024-06-21 19:04:22,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:22,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:22,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:22,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:22,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:22,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 247 transitions, 3082 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 19:04:22,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:22,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:23,508 INFO L124 PetriNetUnfolderBase]: 2307/3594 cut-off events. [2024-06-21 19:04:23,508 INFO L125 PetriNetUnfolderBase]: For 144482/144482 co-relation queries the response was YES. [2024-06-21 19:04:23,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22934 conditions, 3594 events. 2307/3594 cut-off events. For 144482/144482 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18664 event pairs, 617 based on Foata normal form. 4/3597 useless extension candidates. Maximal degree in co-relation 22850. Up to 3217 conditions per place. [2024-06-21 19:04:23,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 53 changer transitions 0/279 dead transitions. [2024-06-21 19:04:23,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 279 transitions, 3788 flow [2024-06-21 19:04:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:04:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:04:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 19:04:23,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 19:04:23,531 INFO L175 Difference]: Start difference. First operand has 167 places, 247 transitions, 3082 flow. Second operand 10 states and 173 transitions. [2024-06-21 19:04:23,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 279 transitions, 3788 flow [2024-06-21 19:04:23,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 279 transitions, 3664 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:23,636 INFO L231 Difference]: Finished difference. Result has 171 places, 251 transitions, 3138 flow [2024-06-21 19:04:23,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3138, PETRI_PLACES=171, PETRI_TRANSITIONS=251} [2024-06-21 19:04:23,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 19:04:23,636 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 251 transitions, 3138 flow [2024-06-21 19:04:23,637 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 19:04:23,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:23,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:04:23,637 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:23,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:23,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1033064382, now seen corresponding path program 3 times [2024-06-21 19:04:23,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:23,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183124994] [2024-06-21 19:04:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:25,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:25,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183124994] [2024-06-21 19:04:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183124994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:25,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045954663] [2024-06-21 19:04:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:25,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:25,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 251 transitions, 3138 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 19:04:25,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:25,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:25,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:26,291 INFO L124 PetriNetUnfolderBase]: 2324/3617 cut-off events. [2024-06-21 19:04:26,291 INFO L125 PetriNetUnfolderBase]: For 153833/153835 co-relation queries the response was YES. [2024-06-21 19:04:26,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23510 conditions, 3617 events. 2324/3617 cut-off events. For 153833/153835 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18838 event pairs, 646 based on Foata normal form. 6/3622 useless extension candidates. Maximal degree in co-relation 23424. Up to 3186 conditions per place. [2024-06-21 19:04:26,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 90 changer transitions 0/276 dead transitions. [2024-06-21 19:04:26,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 276 transitions, 3834 flow [2024-06-21 19:04:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 19:04:26,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 19:04:26,322 INFO L175 Difference]: Start difference. First operand has 171 places, 251 transitions, 3138 flow. Second operand 9 states and 158 transitions. [2024-06-21 19:04:26,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 276 transitions, 3834 flow [2024-06-21 19:04:26,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3706 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:26,426 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 3247 flow [2024-06-21 19:04:26,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3247, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-21 19:04:26,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 19:04:26,426 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 3247 flow [2024-06-21 19:04:26,426 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 19:04:26,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:26,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:26,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:04:26,427 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:26,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1033249080, now seen corresponding path program 1 times [2024-06-21 19:04:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749650063] [2024-06-21 19:04:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:28,128 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 19:04:28,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749650063] [2024-06-21 19:04:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749650063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:28,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:28,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:04:28,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034638406] [2024-06-21 19:04:28,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:28,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:04:28,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:04:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:04:28,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:28,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:28,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:28,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:28,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:29,121 INFO L124 PetriNetUnfolderBase]: 2341/3654 cut-off events. [2024-06-21 19:04:29,121 INFO L125 PetriNetUnfolderBase]: For 163742/163744 co-relation queries the response was YES. [2024-06-21 19:04:29,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24100 conditions, 3654 events. 2341/3654 cut-off events. For 163742/163744 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19131 event pairs, 590 based on Foata normal form. 6/3658 useless extension candidates. Maximal degree in co-relation 24013. Up to 3209 conditions per place. [2024-06-21 19:04:29,149 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 61 changer transitions 0/281 dead transitions. [2024-06-21 19:04:29,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 281 transitions, 3949 flow [2024-06-21 19:04:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:04:29,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:04:29,151 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 3247 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:04:29,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 281 transitions, 3949 flow [2024-06-21 19:04:29,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 281 transitions, 3700 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 19:04:29,333 INFO L231 Difference]: Finished difference. Result has 174 places, 255 transitions, 3171 flow [2024-06-21 19:04:29,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3171, PETRI_PLACES=174, PETRI_TRANSITIONS=255} [2024-06-21 19:04:29,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 19:04:29,333 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 255 transitions, 3171 flow [2024-06-21 19:04:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:29,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:29,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:04:29,334 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 19:04:29,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -776945255, now seen corresponding path program 1 times [2024-06-21 19:04:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361019448] [2024-06-21 19:04:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:30,175 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 19:04:30,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:30,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361019448] [2024-06-21 19:04:30,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361019448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:30,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:30,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:04:30,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816054507] [2024-06-21 19:04:30,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:30,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:04:30,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:04:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:04:30,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:04:30,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 255 transitions, 3171 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:30,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:30,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:04:30,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:30,792 INFO L124 PetriNetUnfolderBase]: 2191/3443 cut-off events. [2024-06-21 19:04:30,792 INFO L125 PetriNetUnfolderBase]: For 167849/167873 co-relation queries the response was YES. [2024-06-21 19:04:30,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23397 conditions, 3443 events. 2191/3443 cut-off events. For 167849/167873 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18164 event pairs, 605 based on Foata normal form. 2/3402 useless extension candidates. Maximal degree in co-relation 23310. Up to 3099 conditions per place. [2024-06-21 19:04:30,820 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 36 changer transitions 0/269 dead transitions. [2024-06-21 19:04:30,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 269 transitions, 3727 flow [2024-06-21 19:04:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:04:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:04:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 19:04:30,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:04:30,822 INFO L175 Difference]: Start difference. First operand has 174 places, 255 transitions, 3171 flow. Second operand 6 states and 112 transitions. [2024-06-21 19:04:30,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 269 transitions, 3727 flow [2024-06-21 19:04:30,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 269 transitions, 3505 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 19:04:30,983 INFO L231 Difference]: Finished difference. Result has 171 places, 258 transitions, 3065 flow [2024-06-21 19:04:30,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3065, PETRI_PLACES=171, PETRI_TRANSITIONS=258} [2024-06-21 19:04:30,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 19:04:30,984 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 258 transitions, 3065 flow [2024-06-21 19:04:30,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:30,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:30,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:30,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:04:30,985 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 19:04:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1213604236, now seen corresponding path program 4 times [2024-06-21 19:04:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229487207] [2024-06-21 19:04:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:32,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:32,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229487207] [2024-06-21 19:04:32,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229487207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:32,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:32,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:32,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997546102] [2024-06-21 19:04:32,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:32,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:32,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:32,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 258 transitions, 3065 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 19:04:32,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:32,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:32,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:33,505 INFO L124 PetriNetUnfolderBase]: 2393/3708 cut-off events. [2024-06-21 19:04:33,505 INFO L125 PetriNetUnfolderBase]: For 177840/177840 co-relation queries the response was YES. [2024-06-21 19:04:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25047 conditions, 3708 events. 2393/3708 cut-off events. For 177840/177840 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19229 event pairs, 642 based on Foata normal form. 4/3711 useless extension candidates. Maximal degree in co-relation 24960. Up to 3282 conditions per place. [2024-06-21 19:04:33,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 93 changer transitions 0/283 dead transitions. [2024-06-21 19:04:33,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 283 transitions, 3791 flow [2024-06-21 19:04:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:04:33,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:04:33,533 INFO L175 Difference]: Start difference. First operand has 171 places, 258 transitions, 3065 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:04:33,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 283 transitions, 3791 flow [2024-06-21 19:04:33,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 283 transitions, 3705 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 19:04:33,685 INFO L231 Difference]: Finished difference. Result has 176 places, 260 transitions, 3227 flow [2024-06-21 19:04:33,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3227, PETRI_PLACES=176, PETRI_TRANSITIONS=260} [2024-06-21 19:04:33,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 19:04:33,686 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 260 transitions, 3227 flow [2024-06-21 19:04:33,686 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 19:04:33,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:33,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:33,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:04:33,686 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 19:04:33,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1441690084, now seen corresponding path program 2 times [2024-06-21 19:04:33,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:33,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124240847] [2024-06-21 19:04:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:33,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:35,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124240847] [2024-06-21 19:04:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124240847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:35,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:35,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:04:35,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822696291] [2024-06-21 19:04:35,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:35,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:04:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:04:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:04:35,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:35,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 260 transitions, 3227 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:35,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:35,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:36,682 INFO L124 PetriNetUnfolderBase]: 2410/3744 cut-off events. [2024-06-21 19:04:36,682 INFO L125 PetriNetUnfolderBase]: For 188910/188914 co-relation queries the response was YES. [2024-06-21 19:04:36,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25792 conditions, 3744 events. 2410/3744 cut-off events. For 188910/188914 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19517 event pairs, 583 based on Foata normal form. 8/3751 useless extension candidates. Maximal degree in co-relation 25704. Up to 3305 conditions per place. [2024-06-21 19:04:36,708 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 216 selfloop transitions, 65 changer transitions 0/287 dead transitions. [2024-06-21 19:04:36,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 287 transitions, 3953 flow [2024-06-21 19:04:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:04:36,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:04:36,710 INFO L175 Difference]: Start difference. First operand has 176 places, 260 transitions, 3227 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:04:36,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 287 transitions, 3953 flow [2024-06-21 19:04:36,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 287 transitions, 3632 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 19:04:36,858 INFO L231 Difference]: Finished difference. Result has 176 places, 262 transitions, 3092 flow [2024-06-21 19:04:36,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3092, PETRI_PLACES=176, PETRI_TRANSITIONS=262} [2024-06-21 19:04:36,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 19:04:36,858 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 262 transitions, 3092 flow [2024-06-21 19:04:36,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:36,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:36,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:36,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:04:36,859 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 19:04:36,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1450260964, now seen corresponding path program 3 times [2024-06-21 19:04:36,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:36,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258572085] [2024-06-21 19:04:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:36,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:38,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:38,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258572085] [2024-06-21 19:04:38,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258572085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:38,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:38,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:38,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668866221] [2024-06-21 19:04:38,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:38,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:38,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:38,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:38,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 262 transitions, 3092 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 19:04:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:38,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:39,511 INFO L124 PetriNetUnfolderBase]: 2427/3771 cut-off events. [2024-06-21 19:04:39,511 INFO L125 PetriNetUnfolderBase]: For 197356/197360 co-relation queries the response was YES. [2024-06-21 19:04:39,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3771 events. 2427/3771 cut-off events. For 197356/197360 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19786 event pairs, 548 based on Foata normal form. 8/3778 useless extension candidates. Maximal degree in co-relation 26102. Up to 3235 conditions per place. [2024-06-21 19:04:39,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 215 selfloop transitions, 72 changer transitions 0/293 dead transitions. [2024-06-21 19:04:39,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 293 transitions, 4034 flow [2024-06-21 19:04:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:04:39,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:04:39,543 INFO L175 Difference]: Start difference. First operand has 176 places, 262 transitions, 3092 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:04:39,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 293 transitions, 4034 flow [2024-06-21 19:04:39,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 293 transitions, 3868 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:39,706 INFO L231 Difference]: Finished difference. Result has 178 places, 266 transitions, 3177 flow [2024-06-21 19:04:39,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3177, PETRI_PLACES=178, PETRI_TRANSITIONS=266} [2024-06-21 19:04:39,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 19:04:39,707 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 266 transitions, 3177 flow [2024-06-21 19:04:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 19:04:39,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:39,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:04:39,708 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 19:04:39,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -898782598, now seen corresponding path program 4 times [2024-06-21 19:04:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333033557] [2024-06-21 19:04:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:41,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:41,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333033557] [2024-06-21 19:04:41,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333033557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:41,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:41,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:04:41,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178482234] [2024-06-21 19:04:41,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:41,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:04:41,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:04:41,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:04:41,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 266 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:41,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:41,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:41,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:42,504 INFO L124 PetriNetUnfolderBase]: 2444/3800 cut-off events. [2024-06-21 19:04:42,505 INFO L125 PetriNetUnfolderBase]: For 207649/207653 co-relation queries the response was YES. [2024-06-21 19:04:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26753 conditions, 3800 events. 2444/3800 cut-off events. For 207649/207653 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19907 event pairs, 583 based on Foata normal form. 8/3807 useless extension candidates. Maximal degree in co-relation 26664. Up to 3359 conditions per place. [2024-06-21 19:04:42,538 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 61 changer transitions 0/295 dead transitions. [2024-06-21 19:04:42,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 295 transitions, 3943 flow [2024-06-21 19:04:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:04:42,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:04:42,540 INFO L175 Difference]: Start difference. First operand has 178 places, 266 transitions, 3177 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:04:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 295 transitions, 3943 flow [2024-06-21 19:04:42,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 295 transitions, 3799 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:42,692 INFO L231 Difference]: Finished difference. Result has 182 places, 268 transitions, 3219 flow [2024-06-21 19:04:42,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=182, PETRI_TRANSITIONS=268} [2024-06-21 19:04:42,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 19:04:42,693 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 268 transitions, 3219 flow [2024-06-21 19:04:42,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:42,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:42,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:42,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:04:42,694 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:42,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash -765517415, now seen corresponding path program 2 times [2024-06-21 19:04:42,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:42,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119702574] [2024-06-21 19:04:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:42,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:43,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:43,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119702574] [2024-06-21 19:04:43,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119702574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:43,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:43,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:04:43,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980232614] [2024-06-21 19:04:43,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:04:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:04:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:04:43,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:04:43,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 268 transitions, 3219 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:43,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:43,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:04:43,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:44,409 INFO L124 PetriNetUnfolderBase]: 2254/3545 cut-off events. [2024-06-21 19:04:44,410 INFO L125 PetriNetUnfolderBase]: For 212457/212482 co-relation queries the response was YES. [2024-06-21 19:04:44,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25628 conditions, 3545 events. 2254/3545 cut-off events. For 212457/212482 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18844 event pairs, 618 based on Foata normal form. 2/3501 useless extension candidates. Maximal degree in co-relation 25537. Up to 3171 conditions per place. [2024-06-21 19:04:44,440 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 44 changer transitions 0/283 dead transitions. [2024-06-21 19:04:44,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 283 transitions, 3907 flow [2024-06-21 19:04:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:04:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:04:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 19:04:44,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:04:44,441 INFO L175 Difference]: Start difference. First operand has 182 places, 268 transitions, 3219 flow. Second operand 6 states and 110 transitions. [2024-06-21 19:04:44,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 283 transitions, 3907 flow [2024-06-21 19:04:44,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 3709 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 19:04:44,679 INFO L231 Difference]: Finished difference. Result has 179 places, 274 transitions, 3189 flow [2024-06-21 19:04:44,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3189, PETRI_PLACES=179, PETRI_TRANSITIONS=274} [2024-06-21 19:04:44,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 19:04:44,680 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 274 transitions, 3189 flow [2024-06-21 19:04:44,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:44,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:44,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:44,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:04:44,680 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:44,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1876848258, now seen corresponding path program 5 times [2024-06-21 19:04:44,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:44,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482132272] [2024-06-21 19:04:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:44,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482132272] [2024-06-21 19:04:45,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482132272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:45,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:45,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289983698] [2024-06-21 19:04:45,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:45,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:45,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 274 transitions, 3189 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 19:04:45,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:45,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:45,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:46,814 INFO L124 PetriNetUnfolderBase]: 2547/3969 cut-off events. [2024-06-21 19:04:46,815 INFO L125 PetriNetUnfolderBase]: For 229658/229660 co-relation queries the response was YES. [2024-06-21 19:04:46,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28398 conditions, 3969 events. 2547/3969 cut-off events. For 229658/229660 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21149 event pairs, 660 based on Foata normal form. 6/3974 useless extension candidates. Maximal degree in co-relation 28307. Up to 3518 conditions per place. [2024-06-21 19:04:46,848 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 76 changer transitions 0/328 dead transitions. [2024-06-21 19:04:46,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 328 transitions, 4333 flow [2024-06-21 19:04:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:04:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:04:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 19:04:46,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:04:46,850 INFO L175 Difference]: Start difference. First operand has 179 places, 274 transitions, 3189 flow. Second operand 11 states and 198 transitions. [2024-06-21 19:04:46,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 328 transitions, 4333 flow [2024-06-21 19:04:47,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 328 transitions, 4265 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 19:04:47,020 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 3481 flow [2024-06-21 19:04:47,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3481, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2024-06-21 19:04:47,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 19:04:47,021 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 3481 flow [2024-06-21 19:04:47,021 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 19:04:47,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:47,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:47,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:04:47,021 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:47,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1930037990, now seen corresponding path program 6 times [2024-06-21 19:04:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:47,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264836551] [2024-06-21 19:04:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264836551] [2024-06-21 19:04:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264836551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:48,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:48,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449557069] [2024-06-21 19:04:48,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:48,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:48,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 3481 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 19:04:48,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:48,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:48,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:49,304 INFO L124 PetriNetUnfolderBase]: 2566/4006 cut-off events. [2024-06-21 19:04:49,304 INFO L125 PetriNetUnfolderBase]: For 241308/241310 co-relation queries the response was YES. [2024-06-21 19:04:49,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29304 conditions, 4006 events. 2566/4006 cut-off events. For 241308/241310 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21505 event pairs, 689 based on Foata normal form. 6/4011 useless extension candidates. Maximal degree in co-relation 29210. Up to 3630 conditions per place. [2024-06-21 19:04:49,338 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-21 19:04:49,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 326 transitions, 4359 flow [2024-06-21 19:04:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:04:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:04:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 19:04:49,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 19:04:49,340 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 3481 flow. Second operand 11 states and 192 transitions. [2024-06-21 19:04:49,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 326 transitions, 4359 flow [2024-06-21 19:04:49,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 326 transitions, 4199 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:49,557 INFO L231 Difference]: Finished difference. Result has 193 places, 290 transitions, 3558 flow [2024-06-21 19:04:49,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3558, PETRI_PLACES=193, PETRI_TRANSITIONS=290} [2024-06-21 19:04:49,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 19:04:49,558 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 290 transitions, 3558 flow [2024-06-21 19:04:49,558 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 19:04:49,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:49,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:49,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:04:49,558 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:49,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:49,559 INFO L85 PathProgramCache]: Analyzing trace with hash 279961192, now seen corresponding path program 7 times [2024-06-21 19:04:49,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:49,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606669618] [2024-06-21 19:04:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606669618] [2024-06-21 19:04:50,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606669618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:50,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:50,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:04:50,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702939768] [2024-06-21 19:04:50,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:50,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:04:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:04:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:04:50,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:04:50,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 290 transitions, 3558 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:50,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:50,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:04:50,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:51,313 INFO L124 PetriNetUnfolderBase]: 2192/3693 cut-off events. [2024-06-21 19:04:51,313 INFO L125 PetriNetUnfolderBase]: For 228069/228113 co-relation queries the response was YES. [2024-06-21 19:04:51,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 3693 events. 2192/3693 cut-off events. For 228069/228113 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21725 event pairs, 418 based on Foata normal form. 47/3730 useless extension candidates. Maximal degree in co-relation 26457. Up to 2645 conditions per place. [2024-06-21 19:04:51,347 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 92 changer transitions 0/345 dead transitions. [2024-06-21 19:04:51,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 345 transitions, 4756 flow [2024-06-21 19:04:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:04:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:04:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 19:04:51,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-21 19:04:51,348 INFO L175 Difference]: Start difference. First operand has 193 places, 290 transitions, 3558 flow. Second operand 10 states and 203 transitions. [2024-06-21 19:04:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 345 transitions, 4756 flow [2024-06-21 19:04:51,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 345 transitions, 4591 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 19:04:51,527 INFO L231 Difference]: Finished difference. Result has 196 places, 308 transitions, 3941 flow [2024-06-21 19:04:51,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=196, PETRI_TRANSITIONS=308} [2024-06-21 19:04:51,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 19:04:51,528 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 308 transitions, 3941 flow [2024-06-21 19:04:51,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:51,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:51,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:51,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:04:51,528 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:51,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:51,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1434820040, now seen corresponding path program 8 times [2024-06-21 19:04:51,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:51,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447218587] [2024-06-21 19:04:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:51,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447218587] [2024-06-21 19:04:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447218587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195076947] [2024-06-21 19:04:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:52,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:52,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:52,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 308 transitions, 3941 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 19:04:52,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:52,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:52,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:53,941 INFO L124 PetriNetUnfolderBase]: 2802/4374 cut-off events. [2024-06-21 19:04:53,941 INFO L125 PetriNetUnfolderBase]: For 277849/277851 co-relation queries the response was YES. [2024-06-21 19:04:53,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33057 conditions, 4374 events. 2802/4374 cut-off events. For 277849/277851 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23915 event pairs, 690 based on Foata normal form. 8/4381 useless extension candidates. Maximal degree in co-relation 32958. Up to 3869 conditions per place. [2024-06-21 19:04:53,984 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 77 changer transitions 0/365 dead transitions. [2024-06-21 19:04:53,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 365 transitions, 5358 flow [2024-06-21 19:04:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:04:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:04:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 19:04:53,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:04:53,989 INFO L175 Difference]: Start difference. First operand has 196 places, 308 transitions, 3941 flow. Second operand 10 states and 182 transitions. [2024-06-21 19:04:53,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 365 transitions, 5358 flow [2024-06-21 19:04:54,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 365 transitions, 5171 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-21 19:04:54,309 INFO L231 Difference]: Finished difference. Result has 203 places, 328 transitions, 4355 flow [2024-06-21 19:04:54,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4355, PETRI_PLACES=203, PETRI_TRANSITIONS=328} [2024-06-21 19:04:54,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 19:04:54,309 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 328 transitions, 4355 flow [2024-06-21 19:04:54,310 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 19:04:54,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:54,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:54,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:04:54,310 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 19:04:54,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:54,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1437677000, now seen corresponding path program 9 times [2024-06-21 19:04:54,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:54,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351590987] [2024-06-21 19:04:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:54,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:55,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351590987] [2024-06-21 19:04:55,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351590987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:55,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:55,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602605497] [2024-06-21 19:04:55,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:55,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:55,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:55,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 328 transitions, 4355 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 19:04:55,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:55,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:55,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:56,744 INFO L124 PetriNetUnfolderBase]: 2784/4350 cut-off events. [2024-06-21 19:04:56,744 INFO L125 PetriNetUnfolderBase]: For 269134/269136 co-relation queries the response was YES. [2024-06-21 19:04:56,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32500 conditions, 4350 events. 2784/4350 cut-off events. For 269134/269136 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23826 event pairs, 713 based on Foata normal form. 10/4359 useless extension candidates. Maximal degree in co-relation 32399. Up to 3973 conditions per place. [2024-06-21 19:04:56,785 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 59 changer transitions 0/356 dead transitions. [2024-06-21 19:04:56,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 356 transitions, 5174 flow [2024-06-21 19:04:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 19:04:56,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:04:56,786 INFO L175 Difference]: Start difference. First operand has 203 places, 328 transitions, 4355 flow. Second operand 9 states and 162 transitions. [2024-06-21 19:04:56,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 356 transitions, 5174 flow [2024-06-21 19:04:57,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 356 transitions, 4821 flow, removed 119 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:57,121 INFO L231 Difference]: Finished difference. Result has 205 places, 328 transitions, 4138 flow [2024-06-21 19:04:57,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4138, PETRI_PLACES=205, PETRI_TRANSITIONS=328} [2024-06-21 19:04:57,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 19:04:57,122 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 328 transitions, 4138 flow [2024-06-21 19:04:57,122 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 19:04:57,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:57,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:57,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:04:57,122 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 19:04:57,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1886097826, now seen corresponding path program 10 times [2024-06-21 19:04:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:57,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080822255] [2024-06-21 19:04:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:58,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:58,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080822255] [2024-06-21 19:04:58,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080822255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:58,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:58,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538594579] [2024-06-21 19:04:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:58,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:58,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:58,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 328 transitions, 4138 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 19:04:58,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:58,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:58,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:59,430 INFO L124 PetriNetUnfolderBase]: 2787/4345 cut-off events. [2024-06-21 19:04:59,430 INFO L125 PetriNetUnfolderBase]: For 267706/267708 co-relation queries the response was YES. [2024-06-21 19:04:59,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31911 conditions, 4345 events. 2787/4345 cut-off events. For 267706/267708 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23670 event pairs, 703 based on Foata normal form. 6/4350 useless extension candidates. Maximal degree in co-relation 31809. Up to 3893 conditions per place. [2024-06-21 19:04:59,472 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 98 changer transitions 0/361 dead transitions. [2024-06-21 19:04:59,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 361 transitions, 5074 flow [2024-06-21 19:04:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:04:59,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:04:59,474 INFO L175 Difference]: Start difference. First operand has 205 places, 328 transitions, 4138 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:04:59,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 361 transitions, 5074 flow [2024-06-21 19:04:59,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 361 transitions, 4964 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:59,812 INFO L231 Difference]: Finished difference. Result has 207 places, 332 transitions, 4312 flow [2024-06-21 19:04:59,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4312, PETRI_PLACES=207, PETRI_TRANSITIONS=332} [2024-06-21 19:04:59,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 19:04:59,812 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 332 transitions, 4312 flow [2024-06-21 19:04:59,812 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 19:04:59,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:59,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:59,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:04:59,813 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 19:04:59,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1885913128, now seen corresponding path program 5 times [2024-06-21 19:04:59,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:59,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998347147] [2024-06-21 19:04:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:59,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:01,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:01,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998347147] [2024-06-21 19:05:01,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998347147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:01,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:01,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:01,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132228138] [2024-06-21 19:05:01,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:01,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:01,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:01,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:01,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:01,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 332 transitions, 4312 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 19:05:01,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:01,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:01,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:02,543 INFO L124 PetriNetUnfolderBase]: 2790/4366 cut-off events. [2024-06-21 19:05:02,543 INFO L125 PetriNetUnfolderBase]: For 255496/255498 co-relation queries the response was YES. [2024-06-21 19:05:02,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31772 conditions, 4366 events. 2790/4366 cut-off events. For 255496/255498 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23971 event pairs, 706 based on Foata normal form. 6/4370 useless extension candidates. Maximal degree in co-relation 31670. Up to 3894 conditions per place. [2024-06-21 19:05:02,586 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 65 changer transitions 0/367 dead transitions. [2024-06-21 19:05:02,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 367 transitions, 5210 flow [2024-06-21 19:05:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:05:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:05:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 19:05:02,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 19:05:02,588 INFO L175 Difference]: Start difference. First operand has 207 places, 332 transitions, 4312 flow. Second operand 9 states and 169 transitions. [2024-06-21 19:05:02,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 367 transitions, 5210 flow [2024-06-21 19:05:02,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 367 transitions, 4944 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 19:05:02,894 INFO L231 Difference]: Finished difference. Result has 209 places, 334 transitions, 4202 flow [2024-06-21 19:05:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4202, PETRI_PLACES=209, PETRI_TRANSITIONS=334} [2024-06-21 19:05:02,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 19:05:02,895 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 334 transitions, 4202 flow [2024-06-21 19:05:02,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 19:05:02,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:05:02,896 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 19:05:02,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 366490969, now seen corresponding path program 3 times [2024-06-21 19:05:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:02,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686421112] [2024-06-21 19:05:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:03,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686421112] [2024-06-21 19:05:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686421112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:03,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:03,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110853390] [2024-06-21 19:05:03,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:03,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:03,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:03,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:05:03,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 334 transitions, 4202 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:03,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:03,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:05:03,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:04,436 INFO L124 PetriNetUnfolderBase]: 2591/4101 cut-off events. [2024-06-21 19:05:04,436 INFO L125 PetriNetUnfolderBase]: For 258044/258068 co-relation queries the response was YES. [2024-06-21 19:05:04,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30250 conditions, 4101 events. 2591/4101 cut-off events. For 258044/258068 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22861 event pairs, 682 based on Foata normal form. 3/4064 useless extension candidates. Maximal degree in co-relation 30147. Up to 3714 conditions per place. [2024-06-21 19:05:04,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 41 changer transitions 0/354 dead transitions. [2024-06-21 19:05:04,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 354 transitions, 4944 flow [2024-06-21 19:05:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 19:05:04,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 19:05:04,477 INFO L175 Difference]: Start difference. First operand has 209 places, 334 transitions, 4202 flow. Second operand 7 states and 129 transitions. [2024-06-21 19:05:04,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 354 transitions, 4944 flow [2024-06-21 19:05:04,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 354 transitions, 4775 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 19:05:04,784 INFO L231 Difference]: Finished difference. Result has 208 places, 337 transitions, 4154 flow [2024-06-21 19:05:04,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4154, PETRI_PLACES=208, PETRI_TRANSITIONS=337} [2024-06-21 19:05:04,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 19:05:04,785 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 337 transitions, 4154 flow [2024-06-21 19:05:04,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:04,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:04,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:04,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:05:04,785 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 19:05:04,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 172697647, now seen corresponding path program 1 times [2024-06-21 19:05:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116545681] [2024-06-21 19:05:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:04,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:05,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:05,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116545681] [2024-06-21 19:05:05,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116545681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635298452] [2024-06-21 19:05:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:05,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:05,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:05,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:05:05,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 337 transitions, 4154 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:05,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:05,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:05:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:06,428 INFO L124 PetriNetUnfolderBase]: 2592/4145 cut-off events. [2024-06-21 19:05:06,429 INFO L125 PetriNetUnfolderBase]: For 233980/233980 co-relation queries the response was YES. [2024-06-21 19:05:06,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29249 conditions, 4145 events. 2592/4145 cut-off events. For 233980/233980 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23389 event pairs, 823 based on Foata normal form. 1/4145 useless extension candidates. Maximal degree in co-relation 29145. Up to 3825 conditions per place. [2024-06-21 19:05:06,469 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 13 changer transitions 0/351 dead transitions. [2024-06-21 19:05:06,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 351 transitions, 4946 flow [2024-06-21 19:05:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 19:05:06,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 19:05:06,471 INFO L175 Difference]: Start difference. First operand has 208 places, 337 transitions, 4154 flow. Second operand 6 states and 109 transitions. [2024-06-21 19:05:06,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 351 transitions, 4946 flow [2024-06-21 19:05:06,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 351 transitions, 4851 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:06,888 INFO L231 Difference]: Finished difference. Result has 208 places, 340 transitions, 4141 flow [2024-06-21 19:05:06,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4141, PETRI_PLACES=208, PETRI_TRANSITIONS=340} [2024-06-21 19:05:06,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 19:05:06,889 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 340 transitions, 4141 flow [2024-06-21 19:05:06,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:06,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:06,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:06,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:05:06,890 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 19:05:06,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash 148774327, now seen corresponding path program 2 times [2024-06-21 19:05:06,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:06,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444550964] [2024-06-21 19:05:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444550964] [2024-06-21 19:05:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444550964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:07,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408818345] [2024-06-21 19:05:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:07,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:07,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 340 transitions, 4141 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 19:05:07,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:07,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:07,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:08,653 INFO L124 PetriNetUnfolderBase]: 2796/4369 cut-off events. [2024-06-21 19:05:08,653 INFO L125 PetriNetUnfolderBase]: For 277553/277555 co-relation queries the response was YES. [2024-06-21 19:05:08,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32132 conditions, 4369 events. 2796/4369 cut-off events. For 277553/277555 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24023 event pairs, 911 based on Foata normal form. 3/4371 useless extension candidates. Maximal degree in co-relation 32027. Up to 4112 conditions per place. [2024-06-21 19:05:08,699 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 327 selfloop transitions, 18 changer transitions 0/351 dead transitions. [2024-06-21 19:05:08,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 351 transitions, 4917 flow [2024-06-21 19:05:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 19:05:08,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:05:08,700 INFO L175 Difference]: Start difference. First operand has 208 places, 340 transitions, 4141 flow. Second operand 7 states and 112 transitions. [2024-06-21 19:05:08,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 351 transitions, 4917 flow [2024-06-21 19:05:09,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 351 transitions, 4857 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:09,061 INFO L231 Difference]: Finished difference. Result has 211 places, 343 transitions, 4179 flow [2024-06-21 19:05:09,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4179, PETRI_PLACES=211, PETRI_TRANSITIONS=343} [2024-06-21 19:05:09,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 19:05:09,062 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 343 transitions, 4179 flow [2024-06-21 19:05:09,062 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 19:05:09,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:09,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:09,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:05:09,063 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:09,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash 148782263, now seen corresponding path program 1 times [2024-06-21 19:05:09,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:09,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75423410] [2024-06-21 19:05:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:09,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:10,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75423410] [2024-06-21 19:05:10,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75423410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:10,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:10,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:10,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001828521] [2024-06-21 19:05:10,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:10,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:10,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:05:10,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 343 transitions, 4179 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 19:05:10,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:10,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:05:10,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:10,866 INFO L124 PetriNetUnfolderBase]: 2506/3999 cut-off events. [2024-06-21 19:05:10,866 INFO L125 PetriNetUnfolderBase]: For 247972/247998 co-relation queries the response was YES. [2024-06-21 19:05:10,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 3999 events. 2506/3999 cut-off events. For 247972/247998 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22510 event pairs, 822 based on Foata normal form. 4/3957 useless extension candidates. Maximal degree in co-relation 29006. Up to 3673 conditions per place. [2024-06-21 19:05:10,907 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 16 changer transitions 0/355 dead transitions. [2024-06-21 19:05:10,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 355 transitions, 4903 flow [2024-06-21 19:05:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:05:10,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:05:10,908 INFO L175 Difference]: Start difference. First operand has 211 places, 343 transitions, 4179 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:05:10,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 355 transitions, 4903 flow [2024-06-21 19:05:11,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 355 transitions, 4827 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:11,188 INFO L231 Difference]: Finished difference. Result has 214 places, 346 transitions, 4183 flow [2024-06-21 19:05:11,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4183, PETRI_PLACES=214, PETRI_TRANSITIONS=346} [2024-06-21 19:05:11,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 19:05:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 346 transitions, 4183 flow [2024-06-21 19:05:11,189 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 19:05:11,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:11,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:11,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:05:11,189 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 19:05:11,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1277662862, now seen corresponding path program 1 times [2024-06-21 19:05:11,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:11,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374655188] [2024-06-21 19:05:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:12,828 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 19:05:12,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374655188] [2024-06-21 19:05:12,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374655188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:12,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:12,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:12,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647477174] [2024-06-21 19:05:12,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:12,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:12,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:12,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 346 transitions, 4183 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:12,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:12,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:12,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:14,291 INFO L124 PetriNetUnfolderBase]: 2972/4638 cut-off events. [2024-06-21 19:05:14,292 INFO L125 PetriNetUnfolderBase]: For 338101/338101 co-relation queries the response was YES. [2024-06-21 19:05:14,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35753 conditions, 4638 events. 2972/4638 cut-off events. For 338101/338101 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25695 event pairs, 736 based on Foata normal form. 16/4647 useless extension candidates. Maximal degree in co-relation 35646. Up to 3919 conditions per place. [2024-06-21 19:05:14,335 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 67 changer transitions 0/386 dead transitions. [2024-06-21 19:05:14,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 386 transitions, 5394 flow [2024-06-21 19:05:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:05:14,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 19:05:14,336 INFO L175 Difference]: Start difference. First operand has 214 places, 346 transitions, 4183 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:05:14,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 386 transitions, 5394 flow [2024-06-21 19:05:14,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 386 transitions, 5336 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:14,717 INFO L231 Difference]: Finished difference. Result has 218 places, 348 transitions, 4359 flow [2024-06-21 19:05:14,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4359, PETRI_PLACES=218, PETRI_TRANSITIONS=348} [2024-06-21 19:05:14,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 19:05:14,718 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 348 transitions, 4359 flow [2024-06-21 19:05:14,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:14,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:14,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:14,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:05:14,718 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 19:05:14,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1517095242, now seen corresponding path program 2 times [2024-06-21 19:05:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236881269] [2024-06-21 19:05:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236881269] [2024-06-21 19:05:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236881269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:16,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:16,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161999450] [2024-06-21 19:05:16,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:16,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:16,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:16,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:16,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 348 transitions, 4359 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:16,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:16,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:16,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:17,708 INFO L124 PetriNetUnfolderBase]: 2936/4586 cut-off events. [2024-06-21 19:05:17,709 INFO L125 PetriNetUnfolderBase]: For 335314/335314 co-relation queries the response was YES. [2024-06-21 19:05:17,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34944 conditions, 4586 events. 2936/4586 cut-off events. For 335314/335314 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25478 event pairs, 744 based on Foata normal form. 20/4599 useless extension candidates. Maximal degree in co-relation 34836. Up to 4080 conditions per place. [2024-06-21 19:05:17,757 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 60 changer transitions 0/378 dead transitions. [2024-06-21 19:05:17,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 378 transitions, 5235 flow [2024-06-21 19:05:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 19:05:17,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:05:17,758 INFO L175 Difference]: Start difference. First operand has 218 places, 348 transitions, 4359 flow. Second operand 10 states and 175 transitions. [2024-06-21 19:05:17,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 378 transitions, 5235 flow [2024-06-21 19:05:18,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 378 transitions, 5119 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:18,187 INFO L231 Difference]: Finished difference. Result has 223 places, 348 transitions, 4376 flow [2024-06-21 19:05:18,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4376, PETRI_PLACES=223, PETRI_TRANSITIONS=348} [2024-06-21 19:05:18,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 19:05:18,188 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 348 transitions, 4376 flow [2024-06-21 19:05:18,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:18,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:18,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:18,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:05:18,189 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 19:05:18,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1189097102, now seen corresponding path program 3 times [2024-06-21 19:05:18,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:18,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312142317] [2024-06-21 19:05:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:19,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:19,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312142317] [2024-06-21 19:05:19,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312142317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:19,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807182017] [2024-06-21 19:05:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:20,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:20,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 348 transitions, 4376 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:20,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:20,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:20,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:21,218 INFO L124 PetriNetUnfolderBase]: 2994/4678 cut-off events. [2024-06-21 19:05:21,219 INFO L125 PetriNetUnfolderBase]: For 340939/340939 co-relation queries the response was YES. [2024-06-21 19:05:21,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35539 conditions, 4678 events. 2994/4678 cut-off events. For 340939/340939 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26090 event pairs, 709 based on Foata normal form. 16/4687 useless extension candidates. Maximal degree in co-relation 35429. Up to 3773 conditions per place. [2024-06-21 19:05:21,267 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 81 changer transitions 0/392 dead transitions. [2024-06-21 19:05:21,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 392 transitions, 5413 flow [2024-06-21 19:05:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:05:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:05:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-21 19:05:21,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-21 19:05:21,269 INFO L175 Difference]: Start difference. First operand has 223 places, 348 transitions, 4376 flow. Second operand 11 states and 197 transitions. [2024-06-21 19:05:21,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 392 transitions, 5413 flow [2024-06-21 19:05:21,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 392 transitions, 5275 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 19:05:21,616 INFO L231 Difference]: Finished difference. Result has 225 places, 349 transitions, 4458 flow [2024-06-21 19:05:21,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4458, PETRI_PLACES=225, PETRI_TRANSITIONS=349} [2024-06-21 19:05:21,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 19:05:21,617 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 349 transitions, 4458 flow [2024-06-21 19:05:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:21,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:21,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:21,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:05:21,618 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:21,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1304486014, now seen corresponding path program 4 times [2024-06-21 19:05:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327694446] [2024-06-21 19:05:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327694446] [2024-06-21 19:05:23,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327694446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:23,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789245023] [2024-06-21 19:05:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:23,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:23,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 349 transitions, 4458 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:23,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:23,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:23,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:24,689 INFO L124 PetriNetUnfolderBase]: 3069/4823 cut-off events. [2024-06-21 19:05:24,689 INFO L125 PetriNetUnfolderBase]: For 367439/367439 co-relation queries the response was YES. [2024-06-21 19:05:24,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36843 conditions, 4823 events. 3069/4823 cut-off events. For 367439/367439 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27170 event pairs, 742 based on Foata normal form. 20/4841 useless extension candidates. Maximal degree in co-relation 36732. Up to 3784 conditions per place. [2024-06-21 19:05:24,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 163 changer transitions 0/387 dead transitions. [2024-06-21 19:05:24,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 387 transitions, 5480 flow [2024-06-21 19:05:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 19:05:24,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 19:05:24,738 INFO L175 Difference]: Start difference. First operand has 225 places, 349 transitions, 4458 flow. Second operand 10 states and 184 transitions. [2024-06-21 19:05:24,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 387 transitions, 5480 flow [2024-06-21 19:05:25,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 387 transitions, 5288 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 19:05:25,152 INFO L231 Difference]: Finished difference. Result has 226 places, 350 transitions, 4653 flow [2024-06-21 19:05:25,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4653, PETRI_PLACES=226, PETRI_TRANSITIONS=350} [2024-06-21 19:05:25,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 19:05:25,153 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 350 transitions, 4653 flow [2024-06-21 19:05:25,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:25,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:25,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:25,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:05:25,154 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 19:05:25,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1299123634, now seen corresponding path program 5 times [2024-06-21 19:05:25,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:25,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708757458] [2024-06-21 19:05:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:25,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:26,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708757458] [2024-06-21 19:05:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708757458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:26,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:26,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:26,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11921129] [2024-06-21 19:05:26,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:26,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:26,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:27,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:27,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 350 transitions, 4653 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:27,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:27,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:27,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:28,424 INFO L124 PetriNetUnfolderBase]: 3144/4953 cut-off events. [2024-06-21 19:05:28,424 INFO L125 PetriNetUnfolderBase]: For 384441/384441 co-relation queries the response was YES. [2024-06-21 19:05:28,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38134 conditions, 4953 events. 3144/4953 cut-off events. For 384441/384441 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28191 event pairs, 766 based on Foata normal form. 20/4971 useless extension candidates. Maximal degree in co-relation 38022. Up to 3909 conditions per place. [2024-06-21 19:05:28,476 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 159 changer transitions 0/389 dead transitions. [2024-06-21 19:05:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 389 transitions, 5683 flow [2024-06-21 19:05:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 19:05:28,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 19:05:28,478 INFO L175 Difference]: Start difference. First operand has 226 places, 350 transitions, 4653 flow. Second operand 10 states and 186 transitions. [2024-06-21 19:05:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 389 transitions, 5683 flow [2024-06-21 19:05:28,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 389 transitions, 5306 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 19:05:28,928 INFO L231 Difference]: Finished difference. Result has 227 places, 351 transitions, 4657 flow [2024-06-21 19:05:28,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4657, PETRI_PLACES=227, PETRI_TRANSITIONS=351} [2024-06-21 19:05:28,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 19:05:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 351 transitions, 4657 flow [2024-06-21 19:05:28,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:28,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:28,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:28,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:05:28,929 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 19:05:28,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1298975764, now seen corresponding path program 6 times [2024-06-21 19:05:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609436870] [2024-06-21 19:05:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:30,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:30,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609436870] [2024-06-21 19:05:30,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609436870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:30,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:30,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:30,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915441754] [2024-06-21 19:05:30,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:30,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:30,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:30,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 351 transitions, 4657 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:30,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:30,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:30,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:32,067 INFO L124 PetriNetUnfolderBase]: 3202/5051 cut-off events. [2024-06-21 19:05:32,067 INFO L125 PetriNetUnfolderBase]: For 392211/392211 co-relation queries the response was YES. [2024-06-21 19:05:32,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38789 conditions, 5051 events. 3202/5051 cut-off events. For 392211/392211 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28862 event pairs, 714 based on Foata normal form. 16/5065 useless extension candidates. Maximal degree in co-relation 38677. Up to 3740 conditions per place. [2024-06-21 19:05:32,116 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 225 selfloop transitions, 162 changer transitions 0/393 dead transitions. [2024-06-21 19:05:32,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 393 transitions, 5712 flow [2024-06-21 19:05:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 19:05:32,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 19:05:32,118 INFO L175 Difference]: Start difference. First operand has 227 places, 351 transitions, 4657 flow. Second operand 10 states and 188 transitions. [2024-06-21 19:05:32,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 393 transitions, 5712 flow [2024-06-21 19:05:32,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 393 transitions, 5317 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 19:05:32,467 INFO L231 Difference]: Finished difference. Result has 228 places, 352 transitions, 4647 flow [2024-06-21 19:05:32,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4647, PETRI_PLACES=228, PETRI_TRANSITIONS=352} [2024-06-21 19:05:32,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 19:05:32,467 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 352 transitions, 4647 flow [2024-06-21 19:05:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:32,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:32,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:32,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:05:32,468 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 19:05:32,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1304701216, now seen corresponding path program 1 times [2024-06-21 19:05:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:32,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385750950] [2024-06-21 19:05:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:32,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:34,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385750950] [2024-06-21 19:05:34,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385750950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:34,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:34,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:05:34,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784158011] [2024-06-21 19:05:34,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:34,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:05:34,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:34,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:05:34,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:05:34,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:34,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 352 transitions, 4647 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:34,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:34,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:34,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:35,784 INFO L124 PetriNetUnfolderBase]: 3330/5258 cut-off events. [2024-06-21 19:05:35,784 INFO L125 PetriNetUnfolderBase]: For 406374/406374 co-relation queries the response was YES. [2024-06-21 19:05:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40251 conditions, 5258 events. 3330/5258 cut-off events. For 406374/406374 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30386 event pairs, 711 based on Foata normal form. 12/5268 useless extension candidates. Maximal degree in co-relation 40139. Up to 3704 conditions per place. [2024-06-21 19:05:35,969 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 218 selfloop transitions, 174 changer transitions 0/398 dead transitions. [2024-06-21 19:05:35,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 398 transitions, 5807 flow [2024-06-21 19:05:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:05:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:05:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 19:05:35,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 19:05:35,971 INFO L175 Difference]: Start difference. First operand has 228 places, 352 transitions, 4647 flow. Second operand 11 states and 201 transitions. [2024-06-21 19:05:35,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 398 transitions, 5807 flow [2024-06-21 19:05:36,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 398 transitions, 5398 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 19:05:36,523 INFO L231 Difference]: Finished difference. Result has 233 places, 358 transitions, 4831 flow [2024-06-21 19:05:36,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4284, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4831, PETRI_PLACES=233, PETRI_TRANSITIONS=358} [2024-06-21 19:05:36,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 19:05:36,523 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 358 transitions, 4831 flow [2024-06-21 19:05:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:36,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:36,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:36,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:05:36,524 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 19:05:36,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1684501937, now seen corresponding path program 1 times [2024-06-21 19:05:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:36,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469626783] [2024-06-21 19:05:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469626783] [2024-06-21 19:05:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469626783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675588820] [2024-06-21 19:05:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:37,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:37,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:37,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 358 transitions, 4831 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 19:05:37,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:37,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:37,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:38,586 INFO L124 PetriNetUnfolderBase]: 3222/5088 cut-off events. [2024-06-21 19:05:38,586 INFO L125 PetriNetUnfolderBase]: For 397799/397830 co-relation queries the response was YES. [2024-06-21 19:05:38,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39320 conditions, 5088 events. 3222/5088 cut-off events. For 397799/397830 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29412 event pairs, 906 based on Foata normal form. 3/5040 useless extension candidates. Maximal degree in co-relation 39205. Up to 4780 conditions per place. [2024-06-21 19:05:38,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 42 changer transitions 0/373 dead transitions. [2024-06-21 19:05:38,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 373 transitions, 5605 flow [2024-06-21 19:05:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 19:05:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 19:05:38,640 INFO L175 Difference]: Start difference. First operand has 233 places, 358 transitions, 4831 flow. Second operand 7 states and 120 transitions. [2024-06-21 19:05:38,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 373 transitions, 5605 flow [2024-06-21 19:05:39,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 373 transitions, 5286 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:39,068 INFO L231 Difference]: Finished difference. Result has 234 places, 361 transitions, 4647 flow [2024-06-21 19:05:39,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4647, PETRI_PLACES=234, PETRI_TRANSITIONS=361} [2024-06-21 19:05:39,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 19:05:39,069 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 361 transitions, 4647 flow [2024-06-21 19:05:39,070 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 19:05:39,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:39,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:39,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:05:39,070 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:39,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:39,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2098032810, now seen corresponding path program 7 times [2024-06-21 19:05:39,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:39,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916926199] [2024-06-21 19:05:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:39,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:40,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:40,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916926199] [2024-06-21 19:05:40,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916926199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:40,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:40,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:40,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242268210] [2024-06-21 19:05:40,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:40,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:40,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:40,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:40,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:40,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 361 transitions, 4647 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:40,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:40,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:40,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:42,432 INFO L124 PetriNetUnfolderBase]: 3427/5412 cut-off events. [2024-06-21 19:05:42,432 INFO L125 PetriNetUnfolderBase]: For 436913/436913 co-relation queries the response was YES. [2024-06-21 19:05:42,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41166 conditions, 5412 events. 3427/5412 cut-off events. For 436913/436913 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31486 event pairs, 732 based on Foata normal form. 20/5431 useless extension candidates. Maximal degree in co-relation 41050. Up to 4375 conditions per place. [2024-06-21 19:05:42,489 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 162 changer transitions 0/397 dead transitions. [2024-06-21 19:05:42,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 397 transitions, 5679 flow [2024-06-21 19:05:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:05:42,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 19:05:42,491 INFO L175 Difference]: Start difference. First operand has 234 places, 361 transitions, 4647 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:05:42,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 397 transitions, 5679 flow [2024-06-21 19:05:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 397 transitions, 5585 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:43,051 INFO L231 Difference]: Finished difference. Result has 240 places, 362 transitions, 4944 flow [2024-06-21 19:05:43,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4944, PETRI_PLACES=240, PETRI_TRANSITIONS=362} [2024-06-21 19:05:43,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 19:05:43,052 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 362 transitions, 4944 flow [2024-06-21 19:05:43,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:43,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:43,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:05:43,052 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:43,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2098180680, now seen corresponding path program 8 times [2024-06-21 19:05:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:43,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600708179] [2024-06-21 19:05:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:44,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:44,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600708179] [2024-06-21 19:05:44,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600708179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:44,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:44,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:44,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348823557] [2024-06-21 19:05:44,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:44,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:44,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:44,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 362 transitions, 4944 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:44,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:44,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:44,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:46,395 INFO L124 PetriNetUnfolderBase]: 3596/5701 cut-off events. [2024-06-21 19:05:46,395 INFO L125 PetriNetUnfolderBase]: For 490849/490849 co-relation queries the response was YES. [2024-06-21 19:05:46,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45277 conditions, 5701 events. 3596/5701 cut-off events. For 490849/490849 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33756 event pairs, 765 based on Foata normal form. 16/5716 useless extension candidates. Maximal degree in co-relation 45160. Up to 4342 conditions per place. [2024-06-21 19:05:46,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 164 changer transitions 0/404 dead transitions. [2024-06-21 19:05:46,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 404 transitions, 6283 flow [2024-06-21 19:05:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 19:05:46,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 19:05:46,450 INFO L175 Difference]: Start difference. First operand has 240 places, 362 transitions, 4944 flow. Second operand 10 states and 185 transitions. [2024-06-21 19:05:46,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 404 transitions, 6283 flow [2024-06-21 19:05:47,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 404 transitions, 5898 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:05:47,095 INFO L231 Difference]: Finished difference. Result has 241 places, 364 transitions, 5011 flow [2024-06-21 19:05:47,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5011, PETRI_PLACES=241, PETRI_TRANSITIONS=364} [2024-06-21 19:05:47,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 19:05:47,096 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 364 transitions, 5011 flow [2024-06-21 19:05:47,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:47,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:47,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:05:47,096 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:47,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -833522968, now seen corresponding path program 9 times [2024-06-21 19:05:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:47,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270479748] [2024-06-21 19:05:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:47,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270479748] [2024-06-21 19:05:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270479748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:48,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940539486] [2024-06-21 19:05:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:48,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:48,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 364 transitions, 5011 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:48,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:48,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:48,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:50,326 INFO L124 PetriNetUnfolderBase]: 3671/5818 cut-off events. [2024-06-21 19:05:50,326 INFO L125 PetriNetUnfolderBase]: For 514565/514565 co-relation queries the response was YES. [2024-06-21 19:05:50,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46252 conditions, 5818 events. 3671/5818 cut-off events. For 514565/514565 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34723 event pairs, 795 based on Foata normal form. 20/5837 useless extension candidates. Maximal degree in co-relation 46135. Up to 4779 conditions per place. [2024-06-21 19:05:50,392 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 216 selfloop transitions, 176 changer transitions 0/399 dead transitions. [2024-06-21 19:05:50,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 399 transitions, 6050 flow [2024-06-21 19:05:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 19:05:50,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 19:05:50,394 INFO L175 Difference]: Start difference. First operand has 241 places, 364 transitions, 5011 flow. Second operand 10 states and 179 transitions. [2024-06-21 19:05:50,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 399 transitions, 6050 flow [2024-06-21 19:05:50,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 399 transitions, 5805 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:51,000 INFO L231 Difference]: Finished difference. Result has 245 places, 365 transitions, 5189 flow [2024-06-21 19:05:51,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5189, PETRI_PLACES=245, PETRI_TRANSITIONS=365} [2024-06-21 19:05:51,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 19:05:51,001 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 365 transitions, 5189 flow [2024-06-21 19:05:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:51,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:51,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:05:51,002 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:51,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1027462378, now seen corresponding path program 10 times [2024-06-21 19:05:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:51,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235429119] [2024-06-21 19:05:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:52,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:52,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235429119] [2024-06-21 19:05:52,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235429119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:52,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:52,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165052813] [2024-06-21 19:05:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:52,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:52,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:52,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 365 transitions, 5189 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:52,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:52,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:52,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:54,317 INFO L124 PetriNetUnfolderBase]: 3635/5770 cut-off events. [2024-06-21 19:05:54,318 INFO L125 PetriNetUnfolderBase]: For 489040/489040 co-relation queries the response was YES. [2024-06-21 19:05:54,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45079 conditions, 5770 events. 3635/5770 cut-off events. For 489040/489040 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34447 event pairs, 777 based on Foata normal form. 20/5789 useless extension candidates. Maximal degree in co-relation 44960. Up to 4723 conditions per place. [2024-06-21 19:05:54,387 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 235 selfloop transitions, 160 changer transitions 0/402 dead transitions. [2024-06-21 19:05:54,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 402 transitions, 6204 flow [2024-06-21 19:05:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 19:05:54,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:05:54,388 INFO L175 Difference]: Start difference. First operand has 245 places, 365 transitions, 5189 flow. Second operand 10 states and 182 transitions. [2024-06-21 19:05:54,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 402 transitions, 6204 flow [2024-06-21 19:05:54,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 402 transitions, 5761 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 19:05:54,959 INFO L231 Difference]: Finished difference. Result has 246 places, 365 transitions, 5075 flow [2024-06-21 19:05:54,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5075, PETRI_PLACES=246, PETRI_TRANSITIONS=365} [2024-06-21 19:05:54,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 19:05:54,960 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 365 transitions, 5075 flow [2024-06-21 19:05:54,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:54,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:54,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:54,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:05:54,961 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:54,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1999221688, now seen corresponding path program 2 times [2024-06-21 19:05:54,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:54,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223777955] [2024-06-21 19:05:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223777955] [2024-06-21 19:05:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223777955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:56,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:56,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:05:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237264939] [2024-06-21 19:05:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:56,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:05:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:05:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:05:57,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:57,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 365 transitions, 5075 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:57,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:57,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:57,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:58,523 INFO L124 PetriNetUnfolderBase]: 3676/5843 cut-off events. [2024-06-21 19:05:58,523 INFO L125 PetriNetUnfolderBase]: For 484336/484336 co-relation queries the response was YES. [2024-06-21 19:05:58,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45237 conditions, 5843 events. 3676/5843 cut-off events. For 484336/484336 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35037 event pairs, 777 based on Foata normal form. 12/5854 useless extension candidates. Maximal degree in co-relation 45118. Up to 4704 conditions per place. [2024-06-21 19:05:58,587 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 177 changer transitions 0/403 dead transitions. [2024-06-21 19:05:58,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 403 transitions, 6160 flow [2024-06-21 19:05:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:05:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:05:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:05:58,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 19:05:58,589 INFO L175 Difference]: Start difference. First operand has 246 places, 365 transitions, 5075 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:05:58,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 403 transitions, 6160 flow [2024-06-21 19:05:59,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 403 transitions, 5698 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 19:05:59,188 INFO L231 Difference]: Finished difference. Result has 245 places, 366 transitions, 5035 flow [2024-06-21 19:05:59,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5035, PETRI_PLACES=245, PETRI_TRANSITIONS=366} [2024-06-21 19:05:59,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 19:05:59,189 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 366 transitions, 5035 flow [2024-06-21 19:05:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:59,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:59,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:59,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:05:59,189 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:59,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1027247176, now seen corresponding path program 3 times [2024-06-21 19:05:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:59,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366155401] [2024-06-21 19:05:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:59,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:01,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:01,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366155401] [2024-06-21 19:06:01,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366155401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:01,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:01,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875717522] [2024-06-21 19:06:01,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:01,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:01,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:01,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 366 transitions, 5035 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 19:06:01,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:01,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:01,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:02,733 INFO L124 PetriNetUnfolderBase]: 3717/5927 cut-off events. [2024-06-21 19:06:02,733 INFO L125 PetriNetUnfolderBase]: For 502069/502069 co-relation queries the response was YES. [2024-06-21 19:06:02,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45990 conditions, 5927 events. 3717/5927 cut-off events. For 502069/502069 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35813 event pairs, 800 based on Foata normal form. 12/5938 useless extension candidates. Maximal degree in co-relation 45871. Up to 4646 conditions per place. [2024-06-21 19:06:02,789 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 162 changer transitions 0/406 dead transitions. [2024-06-21 19:06:02,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 406 transitions, 6141 flow [2024-06-21 19:06:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 19:06:02,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 19:06:02,791 INFO L175 Difference]: Start difference. First operand has 245 places, 366 transitions, 5035 flow. Second operand 10 states and 183 transitions. [2024-06-21 19:06:02,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 406 transitions, 6141 flow [2024-06-21 19:06:03,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 406 transitions, 5741 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:03,348 INFO L231 Difference]: Finished difference. Result has 247 places, 367 transitions, 5029 flow [2024-06-21 19:06:03,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5029, PETRI_PLACES=247, PETRI_TRANSITIONS=367} [2024-06-21 19:06:03,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 19:06:03,349 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 367 transitions, 5029 flow [2024-06-21 19:06:03,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 19:06:03,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:03,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:03,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:06:03,350 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:03,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2008418458, now seen corresponding path program 4 times [2024-06-21 19:06:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565670831] [2024-06-21 19:06:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:05,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565670831] [2024-06-21 19:06:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565670831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:05,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:06:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145110178] [2024-06-21 19:06:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:06:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:06:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:06:05,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:05,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 367 transitions, 5029 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:05,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:05,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:05,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:06,726 INFO L124 PetriNetUnfolderBase]: 3844/6137 cut-off events. [2024-06-21 19:06:06,727 INFO L125 PetriNetUnfolderBase]: For 556371/556371 co-relation queries the response was YES. [2024-06-21 19:06:06,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48687 conditions, 6137 events. 3844/6137 cut-off events. For 556371/556371 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37377 event pairs, 701 based on Foata normal form. 12/6148 useless extension candidates. Maximal degree in co-relation 48567. Up to 3744 conditions per place. [2024-06-21 19:06:06,796 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 208 selfloop transitions, 192 changer transitions 0/407 dead transitions. [2024-06-21 19:06:06,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 407 transitions, 6417 flow [2024-06-21 19:06:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 19:06:06,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:06:06,798 INFO L175 Difference]: Start difference. First operand has 247 places, 367 transitions, 5029 flow. Second operand 10 states and 182 transitions. [2024-06-21 19:06:06,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 407 transitions, 6417 flow [2024-06-21 19:06:07,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 407 transitions, 6045 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:07,541 INFO L231 Difference]: Finished difference. Result has 249 places, 369 transitions, 5177 flow [2024-06-21 19:06:07,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5177, PETRI_PLACES=249, PETRI_TRANSITIONS=369} [2024-06-21 19:06:07,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 19:06:07,542 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 369 transitions, 5177 flow [2024-06-21 19:06:07,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:07,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:07,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:07,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:06:07,542 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 19:06:07,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2038764977, now seen corresponding path program 2 times [2024-06-21 19:06:07,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:07,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262938378] [2024-06-21 19:06:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:07,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:08,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:08,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262938378] [2024-06-21 19:06:08,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262938378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:08,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:08,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:08,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556728064] [2024-06-21 19:06:08,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:08,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:08,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:08,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:08,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 369 transitions, 5177 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 19:06:08,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:08,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:08,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:09,686 INFO L124 PetriNetUnfolderBase]: 3705/5920 cut-off events. [2024-06-21 19:06:09,687 INFO L125 PetriNetUnfolderBase]: For 552802/552833 co-relation queries the response was YES. [2024-06-21 19:06:09,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47979 conditions, 5920 events. 3705/5920 cut-off events. For 552802/552833 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36233 event pairs, 1060 based on Foata normal form. 6/5859 useless extension candidates. Maximal degree in co-relation 47858. Up to 5554 conditions per place. [2024-06-21 19:06:09,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 58 changer transitions 0/389 dead transitions. [2024-06-21 19:06:09,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 389 transitions, 6327 flow [2024-06-21 19:06:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:06:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:06:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 19:06:09,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 19:06:09,753 INFO L175 Difference]: Start difference. First operand has 249 places, 369 transitions, 5177 flow. Second operand 7 states and 121 transitions. [2024-06-21 19:06:09,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 389 transitions, 6327 flow [2024-06-21 19:06:10,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 389 transitions, 6061 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 19:06:10,482 INFO L231 Difference]: Finished difference. Result has 250 places, 378 transitions, 5171 flow [2024-06-21 19:06:10,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5171, PETRI_PLACES=250, PETRI_TRANSITIONS=378} [2024-06-21 19:06:10,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 19:06:10,483 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 378 transitions, 5171 flow [2024-06-21 19:06:10,483 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 19:06:10,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:10,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:06:10,483 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 19:06:10,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2039180687, now seen corresponding path program 3 times [2024-06-21 19:06:10,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:10,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802671551] [2024-06-21 19:06:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:11,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:11,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802671551] [2024-06-21 19:06:11,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802671551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:11,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:11,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407967460] [2024-06-21 19:06:11,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:11,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:11,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:11,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 378 transitions, 5171 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 19:06:11,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:11,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:11,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:12,849 INFO L124 PetriNetUnfolderBase]: 3699/5912 cut-off events. [2024-06-21 19:06:12,849 INFO L125 PetriNetUnfolderBase]: For 557138/557171 co-relation queries the response was YES. [2024-06-21 19:06:12,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48081 conditions, 5912 events. 3699/5912 cut-off events. For 557138/557171 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36154 event pairs, 1059 based on Foata normal form. 11/5856 useless extension candidates. Maximal degree in co-relation 47958. Up to 5549 conditions per place. [2024-06-21 19:06:12,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 61 changer transitions 0/388 dead transitions. [2024-06-21 19:06:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 388 transitions, 6059 flow [2024-06-21 19:06:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:06:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:06:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 19:06:12,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:06:12,922 INFO L175 Difference]: Start difference. First operand has 250 places, 378 transitions, 5171 flow. Second operand 7 states and 119 transitions. [2024-06-21 19:06:12,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 388 transitions, 6059 flow [2024-06-21 19:06:13,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 388 transitions, 5947 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 19:06:13,512 INFO L231 Difference]: Finished difference. Result has 255 places, 378 transitions, 5187 flow [2024-06-21 19:06:13,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5059, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5187, PETRI_PLACES=255, PETRI_TRANSITIONS=378} [2024-06-21 19:06:13,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 19:06:13,513 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 378 transitions, 5187 flow [2024-06-21 19:06:13,513 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 19:06:13,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:13,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:13,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:06:13,513 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:13,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1947244426, now seen corresponding path program 11 times [2024-06-21 19:06:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:13,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082555840] [2024-06-21 19:06:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:14,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082555840] [2024-06-21 19:06:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082555840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:14,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:14,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405116160] [2024-06-21 19:06:14,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:14,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:14,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:14,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:14,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 378 transitions, 5187 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:14,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:14,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:14,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:16,575 INFO L124 PetriNetUnfolderBase]: 4242/6793 cut-off events. [2024-06-21 19:06:16,575 INFO L125 PetriNetUnfolderBase]: For 691715/691729 co-relation queries the response was YES. [2024-06-21 19:06:16,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56408 conditions, 6793 events. 4242/6793 cut-off events. For 691715/691729 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42619 event pairs, 1144 based on Foata normal form. 18/6804 useless extension candidates. Maximal degree in co-relation 56283. Up to 5494 conditions per place. [2024-06-21 19:06:16,649 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 324 selfloop transitions, 106 changer transitions 0/440 dead transitions. [2024-06-21 19:06:16,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 440 transitions, 6819 flow [2024-06-21 19:06:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:06:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:06:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-21 19:06:16,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:06:16,650 INFO L175 Difference]: Start difference. First operand has 255 places, 378 transitions, 5187 flow. Second operand 12 states and 224 transitions. [2024-06-21 19:06:16,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 440 transitions, 6819 flow [2024-06-21 19:06:17,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 440 transitions, 6702 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:06:17,396 INFO L231 Difference]: Finished difference. Result has 263 places, 384 transitions, 5579 flow [2024-06-21 19:06:17,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5579, PETRI_PLACES=263, PETRI_TRANSITIONS=384} [2024-06-21 19:06:17,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 19:06:17,396 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 384 transitions, 5579 flow [2024-06-21 19:06:17,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:17,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:17,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:06:17,397 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:17,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1241107154, now seen corresponding path program 12 times [2024-06-21 19:06:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:17,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639502914] [2024-06-21 19:06:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639502914] [2024-06-21 19:06:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639502914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:18,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375643788] [2024-06-21 19:06:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:18,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:18,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 384 transitions, 5579 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:18,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:18,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:18,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:20,542 INFO L124 PetriNetUnfolderBase]: 4327/6954 cut-off events. [2024-06-21 19:06:20,542 INFO L125 PetriNetUnfolderBase]: For 719273/719287 co-relation queries the response was YES. [2024-06-21 19:06:20,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58122 conditions, 6954 events. 4327/6954 cut-off events. For 719273/719287 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 44196 event pairs, 1378 based on Foata normal form. 22/6969 useless extension candidates. Maximal degree in co-relation 57995. Up to 6236 conditions per place. [2024-06-21 19:06:20,627 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 336 selfloop transitions, 87 changer transitions 0/433 dead transitions. [2024-06-21 19:06:20,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 433 transitions, 6758 flow [2024-06-21 19:06:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:06:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:06:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-21 19:06:20,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:06:20,628 INFO L175 Difference]: Start difference. First operand has 263 places, 384 transitions, 5579 flow. Second operand 12 states and 216 transitions. [2024-06-21 19:06:20,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 433 transitions, 6758 flow [2024-06-21 19:06:21,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 433 transitions, 6579 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:21,605 INFO L231 Difference]: Finished difference. Result has 267 places, 386 transitions, 5681 flow [2024-06-21 19:06:21,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5404, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5681, PETRI_PLACES=267, PETRI_TRANSITIONS=386} [2024-06-21 19:06:21,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 19:06:21,606 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 386 transitions, 5681 flow [2024-06-21 19:06:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:21,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:21,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:21,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:06:21,607 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:21,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -677187106, now seen corresponding path program 13 times [2024-06-21 19:06:21,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:21,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462568402] [2024-06-21 19:06:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:21,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462568402] [2024-06-21 19:06:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462568402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:22,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:22,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848895687] [2024-06-21 19:06:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:23,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:23,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 386 transitions, 5681 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:23,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:23,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:23,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:24,848 INFO L124 PetriNetUnfolderBase]: 4355/6992 cut-off events. [2024-06-21 19:06:24,848 INFO L125 PetriNetUnfolderBase]: For 713610/713624 co-relation queries the response was YES. [2024-06-21 19:06:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58293 conditions, 6992 events. 4355/6992 cut-off events. For 713610/713624 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44360 event pairs, 1308 based on Foata normal form. 18/7003 useless extension candidates. Maximal degree in co-relation 58164. Up to 6092 conditions per place. [2024-06-21 19:06:24,934 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 336 selfloop transitions, 92 changer transitions 0/438 dead transitions. [2024-06-21 19:06:24,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 438 transitions, 6858 flow [2024-06-21 19:06:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:06:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:06:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-21 19:06:24,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:06:24,935 INFO L175 Difference]: Start difference. First operand has 267 places, 386 transitions, 5681 flow. Second operand 12 states and 220 transitions. [2024-06-21 19:06:24,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 438 transitions, 6858 flow [2024-06-21 19:06:26,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 438 transitions, 6666 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:06:26,158 INFO L231 Difference]: Finished difference. Result has 270 places, 387 transitions, 5747 flow [2024-06-21 19:06:26,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5747, PETRI_PLACES=270, PETRI_TRANSITIONS=387} [2024-06-21 19:06:26,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 19:06:26,159 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 387 transitions, 5747 flow [2024-06-21 19:06:26,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:26,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:26,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:06:26,159 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:26,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 18754044, now seen corresponding path program 14 times [2024-06-21 19:06:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:26,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482512516] [2024-06-21 19:06:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:27,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482512516] [2024-06-21 19:06:27,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482512516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:27,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:27,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:27,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543779951] [2024-06-21 19:06:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:27,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:27,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:06:27,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 387 transitions, 5747 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:27,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:27,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:06:27,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:28,841 INFO L124 PetriNetUnfolderBase]: 3890/6791 cut-off events. [2024-06-21 19:06:28,842 INFO L125 PetriNetUnfolderBase]: For 862350/862682 co-relation queries the response was YES. [2024-06-21 19:06:28,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61312 conditions, 6791 events. 3890/6791 cut-off events. For 862350/862682 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48637 event pairs, 767 based on Foata normal form. 73/6689 useless extension candidates. Maximal degree in co-relation 61182. Up to 3878 conditions per place. [2024-06-21 19:06:28,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 128 changer transitions 0/445 dead transitions. [2024-06-21 19:06:28,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 445 transitions, 7457 flow [2024-06-21 19:06:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:06:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:06:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 19:06:28,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49134199134199136 [2024-06-21 19:06:28,925 INFO L175 Difference]: Start difference. First operand has 270 places, 387 transitions, 5747 flow. Second operand 11 states and 227 transitions. [2024-06-21 19:06:28,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 445 transitions, 7457 flow [2024-06-21 19:06:30,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 445 transitions, 7228 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-21 19:06:30,139 INFO L231 Difference]: Finished difference. Result has 272 places, 397 transitions, 6256 flow [2024-06-21 19:06:30,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6256, PETRI_PLACES=272, PETRI_TRANSITIONS=397} [2024-06-21 19:06:30,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 19:06:30,140 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 397 transitions, 6256 flow [2024-06-21 19:06:30,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:30,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:30,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:30,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:06:30,140 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:30,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1529750000, now seen corresponding path program 15 times [2024-06-21 19:06:30,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:30,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263617367] [2024-06-21 19:06:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:31,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263617367] [2024-06-21 19:06:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263617367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:31,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084529980] [2024-06-21 19:06:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:31,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:31,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 397 transitions, 6256 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:31,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:31,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:31,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:33,696 INFO L124 PetriNetUnfolderBase]: 5285/8520 cut-off events. [2024-06-21 19:06:33,696 INFO L125 PetriNetUnfolderBase]: For 964789/964791 co-relation queries the response was YES. [2024-06-21 19:06:33,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74786 conditions, 8520 events. 5285/8520 cut-off events. For 964789/964791 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56313 event pairs, 1574 based on Foata normal form. 26/8545 useless extension candidates. Maximal degree in co-relation 74654. Up to 6752 conditions per place. [2024-06-21 19:06:33,801 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 352 selfloop transitions, 95 changer transitions 0/457 dead transitions. [2024-06-21 19:06:33,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 457 transitions, 8028 flow [2024-06-21 19:06:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:06:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:06:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 19:06:33,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-21 19:06:33,803 INFO L175 Difference]: Start difference. First operand has 272 places, 397 transitions, 6256 flow. Second operand 11 states and 206 transitions. [2024-06-21 19:06:33,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 457 transitions, 8028 flow [2024-06-21 19:06:35,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 457 transitions, 7764 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-21 19:06:35,377 INFO L231 Difference]: Finished difference. Result has 277 places, 406 transitions, 6613 flow [2024-06-21 19:06:35,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6613, PETRI_PLACES=277, PETRI_TRANSITIONS=406} [2024-06-21 19:06:35,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 19:06:35,378 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 406 transitions, 6613 flow [2024-06-21 19:06:35,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:35,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:35,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:35,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:06:35,378 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:35,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1531623950, now seen corresponding path program 16 times [2024-06-21 19:06:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482611961] [2024-06-21 19:06:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:36,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482611961] [2024-06-21 19:06:36,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482611961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:36,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:36,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:36,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295768361] [2024-06-21 19:06:36,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:36,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:37,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 406 transitions, 6613 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:37,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:37,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:39,109 INFO L124 PetriNetUnfolderBase]: 5221/8426 cut-off events. [2024-06-21 19:06:39,109 INFO L125 PetriNetUnfolderBase]: For 891288/891290 co-relation queries the response was YES. [2024-06-21 19:06:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71125 conditions, 8426 events. 5221/8426 cut-off events. For 891288/891290 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 55809 event pairs, 1593 based on Foata normal form. 34/8459 useless extension candidates. Maximal degree in co-relation 70991. Up to 7146 conditions per place. [2024-06-21 19:06:39,206 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 363 selfloop transitions, 77 changer transitions 0/450 dead transitions. [2024-06-21 19:06:39,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 450 transitions, 7967 flow [2024-06-21 19:06:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 19:06:39,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 19:06:39,208 INFO L175 Difference]: Start difference. First operand has 277 places, 406 transitions, 6613 flow. Second operand 10 states and 188 transitions. [2024-06-21 19:06:39,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 450 transitions, 7967 flow [2024-06-21 19:06:40,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 450 transitions, 7705 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:40,539 INFO L231 Difference]: Finished difference. Result has 279 places, 406 transitions, 6519 flow [2024-06-21 19:06:40,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6519, PETRI_PLACES=279, PETRI_TRANSITIONS=406} [2024-06-21 19:06:40,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 19:06:40,539 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 406 transitions, 6519 flow [2024-06-21 19:06:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:40,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:40,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:40,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:06:40,540 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:40,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1618463630, now seen corresponding path program 17 times [2024-06-21 19:06:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449849546] [2024-06-21 19:06:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:40,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:41,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449849546] [2024-06-21 19:06:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449849546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:41,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:41,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736845498] [2024-06-21 19:06:41,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:41,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:41,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:42,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:42,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 406 transitions, 6519 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:42,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:42,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:42,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:44,193 INFO L124 PetriNetUnfolderBase]: 5139/8310 cut-off events. [2024-06-21 19:06:44,193 INFO L125 PetriNetUnfolderBase]: For 822598/822600 co-relation queries the response was YES. [2024-06-21 19:06:44,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66403 conditions, 8310 events. 5139/8310 cut-off events. For 822598/822600 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 55153 event pairs, 1661 based on Foata normal form. 42/8351 useless extension candidates. Maximal degree in co-relation 66268. Up to 7471 conditions per place. [2024-06-21 19:06:44,296 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 366 selfloop transitions, 66 changer transitions 0/442 dead transitions. [2024-06-21 19:06:44,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 442 transitions, 7548 flow [2024-06-21 19:06:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 19:06:44,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:06:44,297 INFO L175 Difference]: Start difference. First operand has 279 places, 406 transitions, 6519 flow. Second operand 10 states and 182 transitions. [2024-06-21 19:06:44,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 442 transitions, 7548 flow [2024-06-21 19:06:45,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 442 transitions, 7127 flow, removed 133 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:45,798 INFO L231 Difference]: Finished difference. Result has 281 places, 406 transitions, 6247 flow [2024-06-21 19:06:45,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6247, PETRI_PLACES=281, PETRI_TRANSITIONS=406} [2024-06-21 19:06:45,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 19:06:45,799 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 406 transitions, 6247 flow [2024-06-21 19:06:45,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:45,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:45,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:45,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:06:45,799 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:45,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1666021508, now seen corresponding path program 18 times [2024-06-21 19:06:45,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:45,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132942251] [2024-06-21 19:06:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:47,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132942251] [2024-06-21 19:06:47,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132942251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:47,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215227387] [2024-06-21 19:06:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:47,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:47,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:47,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:47,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 406 transitions, 6247 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:47,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:47,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:47,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:49,323 INFO L124 PetriNetUnfolderBase]: 5263/8508 cut-off events. [2024-06-21 19:06:49,323 INFO L125 PetriNetUnfolderBase]: For 751162/751162 co-relation queries the response was YES. [2024-06-21 19:06:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65823 conditions, 8508 events. 5263/8508 cut-off events. For 751162/751162 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 56615 event pairs, 1394 based on Foata normal form. 20/8526 useless extension candidates. Maximal degree in co-relation 65687. Up to 7342 conditions per place. [2024-06-21 19:06:49,434 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 265 selfloop transitions, 175 changer transitions 0/450 dead transitions. [2024-06-21 19:06:49,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 450 transitions, 7437 flow [2024-06-21 19:06:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 19:06:49,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 19:06:49,436 INFO L175 Difference]: Start difference. First operand has 281 places, 406 transitions, 6247 flow. Second operand 10 states and 193 transitions. [2024-06-21 19:06:49,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 450 transitions, 7437 flow [2024-06-21 19:06:50,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 450 transitions, 7258 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 19:06:50,520 INFO L231 Difference]: Finished difference. Result has 280 places, 408 transitions, 6516 flow [2024-06-21 19:06:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6516, PETRI_PLACES=280, PETRI_TRANSITIONS=408} [2024-06-21 19:06:50,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 19:06:50,521 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 408 transitions, 6516 flow [2024-06-21 19:06:50,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:50,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:50,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:06:50,521 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:50,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1660514978, now seen corresponding path program 19 times [2024-06-21 19:06:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96249863] [2024-06-21 19:06:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:51,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:51,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96249863] [2024-06-21 19:06:51,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96249863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:51,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:51,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474022716] [2024-06-21 19:06:51,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:52,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:52,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 408 transitions, 6516 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:52,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:52,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:52,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:54,117 INFO L124 PetriNetUnfolderBase]: 5337/8634 cut-off events. [2024-06-21 19:06:54,117 INFO L125 PetriNetUnfolderBase]: For 705043/705043 co-relation queries the response was YES. [2024-06-21 19:06:54,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66097 conditions, 8634 events. 5337/8634 cut-off events. For 705043/705043 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57770 event pairs, 1368 based on Foata normal form. 20/8652 useless extension candidates. Maximal degree in co-relation 65962. Up to 7468 conditions per place. [2024-06-21 19:06:54,242 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 274 selfloop transitions, 169 changer transitions 0/453 dead transitions. [2024-06-21 19:06:54,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 453 transitions, 7716 flow [2024-06-21 19:06:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 19:06:54,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:06:54,243 INFO L175 Difference]: Start difference. First operand has 280 places, 408 transitions, 6516 flow. Second operand 10 states and 195 transitions. [2024-06-21 19:06:54,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 453 transitions, 7716 flow [2024-06-21 19:06:55,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 453 transitions, 7330 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:55,579 INFO L231 Difference]: Finished difference. Result has 282 places, 410 transitions, 6568 flow [2024-06-21 19:06:55,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6568, PETRI_PLACES=282, PETRI_TRANSITIONS=410} [2024-06-21 19:06:55,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 19:06:55,579 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 410 transitions, 6568 flow [2024-06-21 19:06:55,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:55,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:55,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:55,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:06:55,580 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:55,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1660511258, now seen corresponding path program 20 times [2024-06-21 19:06:55,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:55,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201307079] [2024-06-21 19:06:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:55,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:57,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:57,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201307079] [2024-06-21 19:06:57,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201307079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:57,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:57,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:57,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767555944] [2024-06-21 19:06:57,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:57,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:57,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:57,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:57,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 410 transitions, 6568 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:57,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:57,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:57,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:59,202 INFO L124 PetriNetUnfolderBase]: 5347/8652 cut-off events. [2024-06-21 19:06:59,202 INFO L125 PetriNetUnfolderBase]: For 673789/673789 co-relation queries the response was YES. [2024-06-21 19:06:59,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64841 conditions, 8652 events. 5347/8652 cut-off events. For 673789/673789 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 57879 event pairs, 1366 based on Foata normal form. 16/8666 useless extension candidates. Maximal degree in co-relation 64705. Up to 7126 conditions per place. [2024-06-21 19:06:59,313 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 272 selfloop transitions, 175 changer transitions 0/457 dead transitions. [2024-06-21 19:06:59,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 457 transitions, 7718 flow [2024-06-21 19:06:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 19:06:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-21 19:06:59,314 INFO L175 Difference]: Start difference. First operand has 282 places, 410 transitions, 6568 flow. Second operand 10 states and 197 transitions. [2024-06-21 19:06:59,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 457 transitions, 7718 flow [2024-06-21 19:07:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 457 transitions, 7342 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 19:07:00,697 INFO L231 Difference]: Finished difference. Result has 284 places, 411 transitions, 6566 flow [2024-06-21 19:07:00,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6566, PETRI_PLACES=284, PETRI_TRANSITIONS=411} [2024-06-21 19:07:00,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 19:07:00,698 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 411 transitions, 6566 flow [2024-06-21 19:07:00,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:00,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:00,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:00,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:07:00,699 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:00,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1666236710, now seen corresponding path program 5 times [2024-06-21 19:07:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:00,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616371760] [2024-06-21 19:07:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:02,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616371760] [2024-06-21 19:07:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616371760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:02,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:07:02,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537913264] [2024-06-21 19:07:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:07:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:07:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:07:02,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:02,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 411 transitions, 6566 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 19:07:02,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:02,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:02,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:04,455 INFO L124 PetriNetUnfolderBase]: 5354/8670 cut-off events. [2024-06-21 19:07:04,455 INFO L125 PetriNetUnfolderBase]: For 646730/646730 co-relation queries the response was YES. [2024-06-21 19:07:04,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 8670 events. 5354/8670 cut-off events. For 646730/646730 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 58003 event pairs, 1332 based on Foata normal form. 12/8680 useless extension candidates. Maximal degree in co-relation 63795. Up to 6604 conditions per place. [2024-06-21 19:07:04,582 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 258 selfloop transitions, 188 changer transitions 0/456 dead transitions. [2024-06-21 19:07:04,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 456 transitions, 7613 flow [2024-06-21 19:07:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:07:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:07:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 19:07:04,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 19:07:04,584 INFO L175 Difference]: Start difference. First operand has 284 places, 411 transitions, 6566 flow. Second operand 10 states and 193 transitions. [2024-06-21 19:07:04,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 456 transitions, 7613 flow [2024-06-21 19:07:06,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 456 transitions, 7191 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 19:07:06,228 INFO L231 Difference]: Finished difference. Result has 285 places, 411 transitions, 6420 flow [2024-06-21 19:07:06,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6420, PETRI_PLACES=285, PETRI_TRANSITIONS=411} [2024-06-21 19:07:06,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 19:07:06,229 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 411 transitions, 6420 flow [2024-06-21 19:07:06,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 19:07:06,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:06,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:06,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:07:06,229 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 19:07:06,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1523680783, now seen corresponding path program 4 times [2024-06-21 19:07:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:06,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583265778] [2024-06-21 19:07:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:06,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:07,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:07,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583265778] [2024-06-21 19:07:07,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583265778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:07,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:07,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801652471] [2024-06-21 19:07:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:07,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:07,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:07:07,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 411 transitions, 6420 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 19:07:07,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:07,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:07:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:09,128 INFO L124 PetriNetUnfolderBase]: 5472/8805 cut-off events. [2024-06-21 19:07:09,129 INFO L125 PetriNetUnfolderBase]: For 627469/627469 co-relation queries the response was YES. [2024-06-21 19:07:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64377 conditions, 8805 events. 5472/8805 cut-off events. For 627469/627469 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 58649 event pairs, 1757 based on Foata normal form. 2/8806 useless extension candidates. Maximal degree in co-relation 64239. Up to 8480 conditions per place. [2024-06-21 19:07:09,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 391 selfloop transitions, 48 changer transitions 0/443 dead transitions. [2024-06-21 19:07:09,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 443 transitions, 7522 flow [2024-06-21 19:07:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 19:07:09,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 19:07:09,219 INFO L175 Difference]: Start difference. First operand has 285 places, 411 transitions, 6420 flow. Second operand 7 states and 124 transitions. [2024-06-21 19:07:09,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 443 transitions, 7522 flow [2024-06-21 19:07:10,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 443 transitions, 6944 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 19:07:10,012 INFO L231 Difference]: Finished difference. Result has 283 places, 425 transitions, 6133 flow [2024-06-21 19:07:10,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6133, PETRI_PLACES=283, PETRI_TRANSITIONS=425} [2024-06-21 19:07:10,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 19:07:10,012 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 425 transitions, 6133 flow [2024-06-21 19:07:10,012 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 19:07:10,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:10,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:10,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:07:10,013 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 19:07:10,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1861697813, now seen corresponding path program 1 times [2024-06-21 19:07:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:10,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970334752] [2024-06-21 19:07:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:10,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970334752] [2024-06-21 19:07:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970334752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:10,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:10,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869296507] [2024-06-21 19:07:10,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:10,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:10,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:10,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:07:10,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 425 transitions, 6133 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 19:07:10,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:10,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:07:10,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:12,833 INFO L124 PetriNetUnfolderBase]: 5177/8484 cut-off events. [2024-06-21 19:07:12,833 INFO L125 PetriNetUnfolderBase]: For 550106/550106 co-relation queries the response was YES. [2024-06-21 19:07:12,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58861 conditions, 8484 events. 5177/8484 cut-off events. For 550106/550106 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57865 event pairs, 2362 based on Foata normal form. 1/8484 useless extension candidates. Maximal degree in co-relation 58723. Up to 8056 conditions per place. [2024-06-21 19:07:12,921 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 19 changer transitions 0/446 dead transitions. [2024-06-21 19:07:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 446 transitions, 7144 flow [2024-06-21 19:07:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:07:12,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:07:12,922 INFO L175 Difference]: Start difference. First operand has 283 places, 425 transitions, 6133 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:07:12,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 446 transitions, 7144 flow [2024-06-21 19:07:14,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 446 transitions, 7072 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 19:07:14,113 INFO L231 Difference]: Finished difference. Result has 289 places, 431 transitions, 6170 flow [2024-06-21 19:07:14,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6061, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6170, PETRI_PLACES=289, PETRI_TRANSITIONS=431} [2024-06-21 19:07:14,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 19:07:14,114 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 431 transitions, 6170 flow [2024-06-21 19:07:14,114 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 19:07:14,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:14,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:14,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:07:14,114 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 19:07:14,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash 310608817, now seen corresponding path program 1 times [2024-06-21 19:07:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:14,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449283776] [2024-06-21 19:07:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:15,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:15,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449283776] [2024-06-21 19:07:15,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449283776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:15,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:15,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448254062] [2024-06-21 19:07:15,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:15,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:15,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:15,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:15,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 431 transitions, 6170 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 19:07:15,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:15,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:16,926 INFO L124 PetriNetUnfolderBase]: 5278/8592 cut-off events. [2024-06-21 19:07:16,926 INFO L125 PetriNetUnfolderBase]: For 560206/560206 co-relation queries the response was YES. [2024-06-21 19:07:16,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60350 conditions, 8592 events. 5278/8592 cut-off events. For 560206/560206 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58108 event pairs, 2395 based on Foata normal form. 1/8592 useless extension candidates. Maximal degree in co-relation 60209. Up to 8278 conditions per place. [2024-06-21 19:07:17,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 16 changer transitions 0/446 dead transitions. [2024-06-21 19:07:17,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 446 transitions, 7170 flow [2024-06-21 19:07:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:07:17,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 19:07:17,027 INFO L175 Difference]: Start difference. First operand has 289 places, 431 transitions, 6170 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:07:17,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 446 transitions, 7170 flow [2024-06-21 19:07:18,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 446 transitions, 7133 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:18,297 INFO L231 Difference]: Finished difference. Result has 293 places, 434 transitions, 6233 flow [2024-06-21 19:07:18,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6233, PETRI_PLACES=293, PETRI_TRANSITIONS=434} [2024-06-21 19:07:18,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 19:07:18,298 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 434 transitions, 6233 flow [2024-06-21 19:07:18,298 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 19:07:18,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:18,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:18,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:07:18,299 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 19:07:18,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash 358194867, now seen corresponding path program 2 times [2024-06-21 19:07:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:18,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612894786] [2024-06-21 19:07:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:19,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:19,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612894786] [2024-06-21 19:07:19,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612894786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:19,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:19,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502891423] [2024-06-21 19:07:19,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:19,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:19,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:19,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:07:19,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 434 transitions, 6233 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 19:07:19,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:19,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:07:19,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:21,255 INFO L124 PetriNetUnfolderBase]: 5205/8524 cut-off events. [2024-06-21 19:07:21,255 INFO L125 PetriNetUnfolderBase]: For 578292/578292 co-relation queries the response was YES. [2024-06-21 19:07:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60613 conditions, 8524 events. 5205/8524 cut-off events. For 578292/578292 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58189 event pairs, 2360 based on Foata normal form. 1/8524 useless extension candidates. Maximal degree in co-relation 60470. Up to 8079 conditions per place. [2024-06-21 19:07:21,370 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 26 changer transitions 0/453 dead transitions. [2024-06-21 19:07:21,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 453 transitions, 7417 flow [2024-06-21 19:07:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:07:21,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:07:21,371 INFO L175 Difference]: Start difference. First operand has 293 places, 434 transitions, 6233 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:07:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 453 transitions, 7417 flow [2024-06-21 19:07:22,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 453 transitions, 7339 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:22,598 INFO L231 Difference]: Finished difference. Result has 296 places, 440 transitions, 6323 flow [2024-06-21 19:07:22,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6323, PETRI_PLACES=296, PETRI_TRANSITIONS=440} [2024-06-21 19:07:22,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 19:07:22,598 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 440 transitions, 6323 flow [2024-06-21 19:07:22,598 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 19:07:22,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:22,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:22,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:07:22,599 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 19:07:22,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash 317275057, now seen corresponding path program 2 times [2024-06-21 19:07:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:22,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860724200] [2024-06-21 19:07:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:22,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:23,887 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 19:07:23,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:23,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860724200] [2024-06-21 19:07:23,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860724200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:23,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:23,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893263862] [2024-06-21 19:07:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:23,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:23,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:23,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 440 transitions, 6323 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 19:07:23,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:23,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:23,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:25,731 INFO L124 PetriNetUnfolderBase]: 5296/8618 cut-off events. [2024-06-21 19:07:25,732 INFO L125 PetriNetUnfolderBase]: For 593807/593811 co-relation queries the response was YES. [2024-06-21 19:07:25,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62446 conditions, 8618 events. 5296/8618 cut-off events. For 593807/593811 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58316 event pairs, 2399 based on Foata normal form. 5/8622 useless extension candidates. Maximal degree in co-relation 62301. Up to 8287 conditions per place. [2024-06-21 19:07:25,841 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 29 changer transitions 0/456 dead transitions. [2024-06-21 19:07:25,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 456 transitions, 7547 flow [2024-06-21 19:07:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:07:25,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 19:07:25,842 INFO L175 Difference]: Start difference. First operand has 296 places, 440 transitions, 6323 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:07:25,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 456 transitions, 7547 flow [2024-06-21 19:07:27,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 456 transitions, 7488 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:27,364 INFO L231 Difference]: Finished difference. Result has 300 places, 446 transitions, 6462 flow [2024-06-21 19:07:27,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6462, PETRI_PLACES=300, PETRI_TRANSITIONS=446} [2024-06-21 19:07:27,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 19:07:27,365 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 446 transitions, 6462 flow [2024-06-21 19:07:27,365 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 19:07:27,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:27,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:27,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:07:27,366 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 19:07:27,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash 317037907, now seen corresponding path program 3 times [2024-06-21 19:07:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:27,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609906509] [2024-06-21 19:07:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:27,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:28,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609906509] [2024-06-21 19:07:28,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609906509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:28,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:28,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699349569] [2024-06-21 19:07:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:28,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:28,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:28,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 446 transitions, 6462 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 19:07:28,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:28,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:28,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:30,320 INFO L124 PetriNetUnfolderBase]: 5293/8614 cut-off events. [2024-06-21 19:07:30,320 INFO L125 PetriNetUnfolderBase]: For 605777/605781 co-relation queries the response was YES. [2024-06-21 19:07:30,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62780 conditions, 8614 events. 5293/8614 cut-off events. For 605777/605781 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58304 event pairs, 2399 based on Foata normal form. 5/8618 useless extension candidates. Maximal degree in co-relation 62633. Up to 8284 conditions per place. [2024-06-21 19:07:30,430 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 28 changer transitions 0/455 dead transitions. [2024-06-21 19:07:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 455 transitions, 7400 flow [2024-06-21 19:07:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:07:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 19:07:30,431 INFO L175 Difference]: Start difference. First operand has 300 places, 446 transitions, 6462 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:07:30,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 455 transitions, 7400 flow [2024-06-21 19:07:31,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 455 transitions, 7275 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:31,683 INFO L231 Difference]: Finished difference. Result has 304 places, 446 transitions, 6399 flow [2024-06-21 19:07:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6399, PETRI_PLACES=304, PETRI_TRANSITIONS=446} [2024-06-21 19:07:31,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 19:07:31,684 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 446 transitions, 6399 flow [2024-06-21 19:07:31,684 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 19:07:31,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:31,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:07:31,685 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 19:07:31,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2038949303, now seen corresponding path program 3 times [2024-06-21 19:07:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:31,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046568691] [2024-06-21 19:07:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:32,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:32,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046568691] [2024-06-21 19:07:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046568691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:32,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582021374] [2024-06-21 19:07:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:32,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:07:32,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 446 transitions, 6399 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 19:07:32,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:32,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:07:32,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:34,713 INFO L124 PetriNetUnfolderBase]: 5204/8525 cut-off events. [2024-06-21 19:07:34,713 INFO L125 PetriNetUnfolderBase]: For 616255/616257 co-relation queries the response was YES. [2024-06-21 19:07:34,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62380 conditions, 8525 events. 5204/8525 cut-off events. For 616255/616257 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58195 event pairs, 2372 based on Foata normal form. 1/8525 useless extension candidates. Maximal degree in co-relation 62231. Up to 8068 conditions per place. [2024-06-21 19:07:34,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 33 changer transitions 0/459 dead transitions. [2024-06-21 19:07:34,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 459 transitions, 7533 flow [2024-06-21 19:07:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:07:34,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:07:34,813 INFO L175 Difference]: Start difference. First operand has 304 places, 446 transitions, 6399 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:07:34,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 459 transitions, 7533 flow [2024-06-21 19:07:36,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 459 transitions, 7457 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:07:36,275 INFO L231 Difference]: Finished difference. Result has 305 places, 449 transitions, 6451 flow [2024-06-21 19:07:36,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6451, PETRI_PLACES=305, PETRI_TRANSITIONS=449} [2024-06-21 19:07:36,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 19:07:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 449 transitions, 6451 flow [2024-06-21 19:07:36,277 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 19:07:36,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:36,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:36,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:07:36,277 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 19:07:36,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash 674231736, now seen corresponding path program 1 times [2024-06-21 19:07:36,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:36,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324616325] [2024-06-21 19:07:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:36,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:37,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324616325] [2024-06-21 19:07:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324616325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:37,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:37,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078090057] [2024-06-21 19:07:37,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:37,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:37,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 449 transitions, 6451 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 19:07:37,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:37,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:39,249 INFO L124 PetriNetUnfolderBase]: 5413/8759 cut-off events. [2024-06-21 19:07:39,249 INFO L125 PetriNetUnfolderBase]: For 730946/730952 co-relation queries the response was YES. [2024-06-21 19:07:39,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67116 conditions, 8759 events. 5413/8759 cut-off events. For 730946/730952 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 58878 event pairs, 1977 based on Foata normal form. 7/8765 useless extension candidates. Maximal degree in co-relation 66966. Up to 8343 conditions per place. [2024-06-21 19:07:39,351 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 39 changer transitions 0/466 dead transitions. [2024-06-21 19:07:39,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 466 transitions, 7469 flow [2024-06-21 19:07:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 19:07:39,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 19:07:39,353 INFO L175 Difference]: Start difference. First operand has 305 places, 449 transitions, 6451 flow. Second operand 7 states and 124 transitions. [2024-06-21 19:07:39,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 466 transitions, 7469 flow [2024-06-21 19:07:40,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 466 transitions, 7363 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:40,509 INFO L231 Difference]: Finished difference. Result has 307 places, 452 transitions, 6499 flow [2024-06-21 19:07:40,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6499, PETRI_PLACES=307, PETRI_TRANSITIONS=452} [2024-06-21 19:07:40,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 19:07:40,509 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 452 transitions, 6499 flow [2024-06-21 19:07:40,509 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 19:07:40,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:40,510 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 19:07:40,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:07:40,510 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 19:07:40,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:40,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1991447936, now seen corresponding path program 2 times [2024-06-21 19:07:40,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:40,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731221503] [2024-06-21 19:07:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:40,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:41,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:41,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731221503] [2024-06-21 19:07:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731221503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:41,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936513431] [2024-06-21 19:07:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:41,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:41,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:41,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:41,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:41,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 452 transitions, 6499 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 19:07:41,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:41,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:41,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:43,648 INFO L124 PetriNetUnfolderBase]: 5424/8777 cut-off events. [2024-06-21 19:07:43,648 INFO L125 PetriNetUnfolderBase]: For 751231/751237 co-relation queries the response was YES. [2024-06-21 19:07:43,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67881 conditions, 8777 events. 5424/8777 cut-off events. For 751231/751237 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 59090 event pairs, 1979 based on Foata normal form. 7/8783 useless extension candidates. Maximal degree in co-relation 67730. Up to 8344 conditions per place. [2024-06-21 19:07:43,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 48 changer transitions 0/476 dead transitions. [2024-06-21 19:07:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 476 transitions, 7819 flow [2024-06-21 19:07:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:07:43,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 19:07:43,751 INFO L175 Difference]: Start difference. First operand has 307 places, 452 transitions, 6499 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:07:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 476 transitions, 7819 flow [2024-06-21 19:07:45,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 476 transitions, 7691 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:45,538 INFO L231 Difference]: Finished difference. Result has 310 places, 463 transitions, 6694 flow [2024-06-21 19:07:45,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6694, PETRI_PLACES=310, PETRI_TRANSITIONS=463} [2024-06-21 19:07:45,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 19:07:45,538 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 463 transitions, 6694 flow [2024-06-21 19:07:45,539 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 19:07:45,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:45,539 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 19:07:45,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:07:45,539 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 19:07:45,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:45,539 INFO L85 PathProgramCache]: Analyzing trace with hash 679953592, now seen corresponding path program 1 times [2024-06-21 19:07:45,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:45,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623011011] [2024-06-21 19:07:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:45,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:46,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:46,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623011011] [2024-06-21 19:07:46,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623011011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:46,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:46,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707054613] [2024-06-21 19:07:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:46,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:46,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 463 transitions, 6694 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 19:07:46,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:46,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:46,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:48,510 INFO L124 PetriNetUnfolderBase]: 5274/8510 cut-off events. [2024-06-21 19:07:48,510 INFO L125 PetriNetUnfolderBase]: For 771484/771517 co-relation queries the response was YES. [2024-06-21 19:07:48,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67027 conditions, 8510 events. 5274/8510 cut-off events. For 771484/771517 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 56788 event pairs, 1669 based on Foata normal form. 4/8433 useless extension candidates. Maximal degree in co-relation 66874. Up to 8098 conditions per place. [2024-06-21 19:07:48,627 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 55 changer transitions 0/479 dead transitions. [2024-06-21 19:07:48,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 479 transitions, 7676 flow [2024-06-21 19:07:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:07:48,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:07:48,629 INFO L175 Difference]: Start difference. First operand has 310 places, 463 transitions, 6694 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:07:48,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 479 transitions, 7676 flow [2024-06-21 19:07:49,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 479 transitions, 7538 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:49,851 INFO L231 Difference]: Finished difference. Result has 315 places, 466 transitions, 6723 flow [2024-06-21 19:07:49,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6723, PETRI_PLACES=315, PETRI_TRANSITIONS=466} [2024-06-21 19:07:49,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 19:07:49,852 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 466 transitions, 6723 flow [2024-06-21 19:07:49,852 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 19:07:49,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:49,852 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 19:07:49,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:07:49,853 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 19:07:49,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1870341560, now seen corresponding path program 3 times [2024-06-21 19:07:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389099398] [2024-06-21 19:07:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:50,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:50,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389099398] [2024-06-21 19:07:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389099398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:50,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318541384] [2024-06-21 19:07:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:50,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:50,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:50,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 466 transitions, 6723 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 19:07:50,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:50,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:50,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:52,699 INFO L124 PetriNetUnfolderBase]: 5434/8792 cut-off events. [2024-06-21 19:07:52,700 INFO L125 PetriNetUnfolderBase]: For 784150/784160 co-relation queries the response was YES. [2024-06-21 19:07:52,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68947 conditions, 8792 events. 5434/8792 cut-off events. For 784150/784160 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59083 event pairs, 1976 based on Foata normal form. 5/8791 useless extension candidates. Maximal degree in co-relation 68793. Up to 8376 conditions per place. [2024-06-21 19:07:52,834 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 40 changer transitions 0/481 dead transitions. [2024-06-21 19:07:52,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 481 transitions, 7736 flow [2024-06-21 19:07:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 19:07:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 19:07:52,835 INFO L175 Difference]: Start difference. First operand has 315 places, 466 transitions, 6723 flow. Second operand 7 states and 122 transitions. [2024-06-21 19:07:52,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 481 transitions, 7736 flow [2024-06-21 19:07:54,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 481 transitions, 7555 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 19:07:54,085 INFO L231 Difference]: Finished difference. Result has 316 places, 467 transitions, 6644 flow [2024-06-21 19:07:54,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6644, PETRI_PLACES=316, PETRI_TRANSITIONS=467} [2024-06-21 19:07:54,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 19:07:54,085 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 467 transitions, 6644 flow [2024-06-21 19:07:54,085 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 19:07:54,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:54,086 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 19:07:54,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:07:54,086 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 19:07:54,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1416389862, now seen corresponding path program 4 times [2024-06-21 19:07:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064091412] [2024-06-21 19:07:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:55,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064091412] [2024-06-21 19:07:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064091412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:55,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:55,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:55,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754872042] [2024-06-21 19:07:55,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:55,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:55,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:55,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:55,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 467 transitions, 6644 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 19:07:55,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:55,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:55,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:57,020 INFO L124 PetriNetUnfolderBase]: 5447/8810 cut-off events. [2024-06-21 19:07:57,020 INFO L125 PetriNetUnfolderBase]: For 803960/803970 co-relation queries the response was YES. [2024-06-21 19:07:57,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69317 conditions, 8810 events. 5447/8810 cut-off events. For 803960/803970 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 59224 event pairs, 1976 based on Foata normal form. 5/8809 useless extension candidates. Maximal degree in co-relation 69162. Up to 8377 conditions per place. [2024-06-21 19:07:57,145 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 420 selfloop transitions, 51 changer transitions 0/486 dead transitions. [2024-06-21 19:07:57,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 486 transitions, 7958 flow [2024-06-21 19:07:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:07:57,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:07:57,146 INFO L175 Difference]: Start difference. First operand has 316 places, 467 transitions, 6644 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:07:57,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 486 transitions, 7958 flow [2024-06-21 19:07:58,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 486 transitions, 7871 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:58,626 INFO L231 Difference]: Finished difference. Result has 319 places, 473 transitions, 6811 flow [2024-06-21 19:07:58,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6811, PETRI_PLACES=319, PETRI_TRANSITIONS=473} [2024-06-21 19:07:58,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 19:07:58,627 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 473 transitions, 6811 flow [2024-06-21 19:07:58,627 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 19:07:58,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:58,627 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 19:07:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:07:58,627 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 19:07:58,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1217088072, now seen corresponding path program 5 times [2024-06-21 19:07:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322897455] [2024-06-21 19:07:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:59,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:59,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322897455] [2024-06-21 19:07:59,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322897455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:59,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:59,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:59,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690774422] [2024-06-21 19:07:59,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:59,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:59,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:59,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:59,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 473 transitions, 6811 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 19:07:59,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:59,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:59,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:01,613 INFO L124 PetriNetUnfolderBase]: 5454/8818 cut-off events. [2024-06-21 19:08:01,613 INFO L125 PetriNetUnfolderBase]: For 824430/824444 co-relation queries the response was YES. [2024-06-21 19:08:01,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69920 conditions, 8818 events. 5454/8818 cut-off events. For 824430/824444 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59181 event pairs, 1962 based on Foata normal form. 9/8821 useless extension candidates. Maximal degree in co-relation 69764. Up to 8352 conditions per place. [2024-06-21 19:08:01,735 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 72 changer transitions 0/495 dead transitions. [2024-06-21 19:08:01,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 495 transitions, 8361 flow [2024-06-21 19:08:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:08:01,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:08:01,736 INFO L175 Difference]: Start difference. First operand has 319 places, 473 transitions, 6811 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:08:01,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 495 transitions, 8361 flow [2024-06-21 19:08:03,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 495 transitions, 8242 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 19:08:03,160 INFO L231 Difference]: Finished difference. Result has 324 places, 484 transitions, 7103 flow [2024-06-21 19:08:03,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7103, PETRI_PLACES=324, PETRI_TRANSITIONS=484} [2024-06-21 19:08:03,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 19:08:03,161 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 484 transitions, 7103 flow [2024-06-21 19:08:03,161 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 19:08:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:03,162 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 19:08:03,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:08:03,162 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 19:08:03,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1222801992, now seen corresponding path program 6 times [2024-06-21 19:08:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767847334] [2024-06-21 19:08:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767847334] [2024-06-21 19:08:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767847334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:04,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266015011] [2024-06-21 19:08:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:04,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:04,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:04,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 484 transitions, 7103 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 19:08:04,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:04,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:04,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:06,346 INFO L124 PetriNetUnfolderBase]: 5459/8825 cut-off events. [2024-06-21 19:08:06,347 INFO L125 PetriNetUnfolderBase]: For 844344/844358 co-relation queries the response was YES. [2024-06-21 19:08:06,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70646 conditions, 8825 events. 5459/8825 cut-off events. For 844344/844358 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59250 event pairs, 1962 based on Foata normal form. 9/8828 useless extension candidates. Maximal degree in co-relation 70487. Up to 8358 conditions per place. [2024-06-21 19:08:06,467 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 73 changer transitions 0/497 dead transitions. [2024-06-21 19:08:06,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 497 transitions, 8361 flow [2024-06-21 19:08:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 19:08:06,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 19:08:06,468 INFO L175 Difference]: Start difference. First operand has 324 places, 484 transitions, 7103 flow. Second operand 8 states and 129 transitions. [2024-06-21 19:08:06,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 497 transitions, 8361 flow [2024-06-21 19:08:08,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 497 transitions, 8200 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 19:08:08,374 INFO L231 Difference]: Finished difference. Result has 329 places, 487 transitions, 7176 flow [2024-06-21 19:08:08,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6962, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7176, PETRI_PLACES=329, PETRI_TRANSITIONS=487} [2024-06-21 19:08:08,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 19:08:08,374 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 487 transitions, 7176 flow [2024-06-21 19:08:08,374 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 19:08:08,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:08,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:08,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:08:08,375 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 19:08:08,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1209907046, now seen corresponding path program 2 times [2024-06-21 19:08:08,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:08,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139115200] [2024-06-21 19:08:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:09,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139115200] [2024-06-21 19:08:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139115200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:09,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:09,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789714824] [2024-06-21 19:08:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:09,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:09,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:09,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 487 transitions, 7176 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 19:08:09,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:09,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:09,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:11,649 INFO L124 PetriNetUnfolderBase]: 5318/8567 cut-off events. [2024-06-21 19:08:11,650 INFO L125 PetriNetUnfolderBase]: For 861320/861349 co-relation queries the response was YES. [2024-06-21 19:08:11,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69068 conditions, 8567 events. 5318/8567 cut-off events. For 861320/861349 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57067 event pairs, 1673 based on Foata normal form. 7/8491 useless extension candidates. Maximal degree in co-relation 68907. Up to 8083 conditions per place. [2024-06-21 19:08:11,771 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 89 changer transitions 0/510 dead transitions. [2024-06-21 19:08:11,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 510 transitions, 8662 flow [2024-06-21 19:08:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:08:11,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 19:08:11,772 INFO L175 Difference]: Start difference. First operand has 329 places, 487 transitions, 7176 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:08:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 510 transitions, 8662 flow [2024-06-21 19:08:13,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 510 transitions, 8512 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 19:08:13,750 INFO L231 Difference]: Finished difference. Result has 335 places, 498 transitions, 7409 flow [2024-06-21 19:08:13,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7409, PETRI_PLACES=335, PETRI_TRANSITIONS=498} [2024-06-21 19:08:13,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 19:08:13,750 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 498 transitions, 7409 flow [2024-06-21 19:08:13,750 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 19:08:13,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:13,751 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 19:08:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:08:13,751 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 19:08:13,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1209461576, now seen corresponding path program 3 times [2024-06-21 19:08:13,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:13,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640810532] [2024-06-21 19:08:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:13,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640810532] [2024-06-21 19:08:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640810532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:14,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:14,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616189012] [2024-06-21 19:08:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:15,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:15,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 498 transitions, 7409 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 19:08:15,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:15,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:15,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:16,961 INFO L124 PetriNetUnfolderBase]: 5312/8559 cut-off events. [2024-06-21 19:08:16,961 INFO L125 PetriNetUnfolderBase]: For 876315/876344 co-relation queries the response was YES. [2024-06-21 19:08:17,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69636 conditions, 8559 events. 5312/8559 cut-off events. For 876315/876344 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 57051 event pairs, 1672 based on Foata normal form. 12/8488 useless extension candidates. Maximal degree in co-relation 69473. Up to 8078 conditions per place. [2024-06-21 19:08:17,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 94 changer transitions 0/510 dead transitions. [2024-06-21 19:08:17,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 510 transitions, 8741 flow [2024-06-21 19:08:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:08:17,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 19:08:17,090 INFO L175 Difference]: Start difference. First operand has 335 places, 498 transitions, 7409 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:08:17,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 510 transitions, 8741 flow [2024-06-21 19:08:19,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 510 transitions, 8575 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 19:08:19,244 INFO L231 Difference]: Finished difference. Result has 339 places, 498 transitions, 7437 flow [2024-06-21 19:08:19,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7243, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7437, PETRI_PLACES=339, PETRI_TRANSITIONS=498} [2024-06-21 19:08:19,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-21 19:08:19,245 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 498 transitions, 7437 flow [2024-06-21 19:08:19,245 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 19:08:19,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:19,245 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 19:08:19,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:08:19,245 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 19:08:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1222794056, now seen corresponding path program 4 times [2024-06-21 19:08:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308827717] [2024-06-21 19:08:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:20,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:20,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308827717] [2024-06-21 19:08:20,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308827717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:20,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:20,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:20,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828503433] [2024-06-21 19:08:20,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:20,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:20,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:20,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:20,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 498 transitions, 7437 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 19:08:20,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:20,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:20,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:22,507 INFO L124 PetriNetUnfolderBase]: 5321/8574 cut-off events. [2024-06-21 19:08:22,507 INFO L125 PetriNetUnfolderBase]: For 893968/893993 co-relation queries the response was YES. [2024-06-21 19:08:22,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70104 conditions, 8574 events. 5321/8574 cut-off events. For 893968/893993 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 57131 event pairs, 1672 based on Foata normal form. 4/8495 useless extension candidates. Maximal degree in co-relation 69939. Up to 8088 conditions per place. [2024-06-21 19:08:22,631 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 84 changer transitions 0/512 dead transitions. [2024-06-21 19:08:22,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 512 transitions, 8654 flow [2024-06-21 19:08:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:08:22,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 19:08:22,632 INFO L175 Difference]: Start difference. First operand has 339 places, 498 transitions, 7437 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:08:22,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 512 transitions, 8654 flow [2024-06-21 19:08:24,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 512 transitions, 8465 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:24,908 INFO L231 Difference]: Finished difference. Result has 342 places, 501 transitions, 7479 flow [2024-06-21 19:08:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7479, PETRI_PLACES=342, PETRI_TRANSITIONS=501} [2024-06-21 19:08:24,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 19:08:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 501 transitions, 7479 flow [2024-06-21 19:08:24,909 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 19:08:24,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:24,910 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 19:08:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:08:24,910 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 19:08:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1549324326, now seen corresponding path program 7 times [2024-06-21 19:08:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:24,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459700786] [2024-06-21 19:08:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:24,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:25,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459700786] [2024-06-21 19:08:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459700786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:25,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164102544] [2024-06-21 19:08:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:25,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:25,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 501 transitions, 7479 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 19:08:25,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:25,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:25,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:27,878 INFO L124 PetriNetUnfolderBase]: 5480/8855 cut-off events. [2024-06-21 19:08:27,878 INFO L125 PetriNetUnfolderBase]: For 904987/904993 co-relation queries the response was YES. [2024-06-21 19:08:27,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71726 conditions, 8855 events. 5480/8855 cut-off events. For 904987/904993 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59559 event pairs, 1970 based on Foata normal form. 7/8853 useless extension candidates. Maximal degree in co-relation 71560. Up to 8439 conditions per place. [2024-06-21 19:08:27,999 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 44 changer transitions 0/525 dead transitions. [2024-06-21 19:08:27,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 525 transitions, 8642 flow [2024-06-21 19:08:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:08:28,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 19:08:28,000 INFO L175 Difference]: Start difference. First operand has 342 places, 501 transitions, 7479 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:08:28,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 525 transitions, 8642 flow [2024-06-21 19:08:29,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 525 transitions, 8457 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:29,853 INFO L231 Difference]: Finished difference. Result has 343 places, 504 transitions, 7437 flow [2024-06-21 19:08:29,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7437, PETRI_PLACES=343, PETRI_TRANSITIONS=504} [2024-06-21 19:08:29,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-21 19:08:29,854 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 504 transitions, 7437 flow [2024-06-21 19:08:29,854 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 19:08:29,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:29,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:29,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:08:29,854 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 19:08:29,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:29,854 INFO L85 PathProgramCache]: Analyzing trace with hash 924814934, now seen corresponding path program 8 times [2024-06-21 19:08:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:29,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314345678] [2024-06-21 19:08:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:29,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314345678] [2024-06-21 19:08:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314345678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:30,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:30,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454336495] [2024-06-21 19:08:30,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:30,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:30,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 504 transitions, 7437 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 19:08:30,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:30,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:30,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:32,762 INFO L124 PetriNetUnfolderBase]: 5492/8874 cut-off events. [2024-06-21 19:08:32,762 INFO L125 PetriNetUnfolderBase]: For 918130/918136 co-relation queries the response was YES. [2024-06-21 19:08:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71796 conditions, 8874 events. 5492/8874 cut-off events. For 918130/918136 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59696 event pairs, 1976 based on Foata normal form. 7/8876 useless extension candidates. Maximal degree in co-relation 71630. Up to 8438 conditions per place. [2024-06-21 19:08:32,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 456 selfloop transitions, 60 changer transitions 0/531 dead transitions. [2024-06-21 19:08:32,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 531 transitions, 8657 flow [2024-06-21 19:08:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 19:08:32,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 19:08:32,886 INFO L175 Difference]: Start difference. First operand has 343 places, 504 transitions, 7437 flow. Second operand 7 states and 130 transitions. [2024-06-21 19:08:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 531 transitions, 8657 flow [2024-06-21 19:08:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 531 transitions, 8503 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:35,112 INFO L231 Difference]: Finished difference. Result has 345 places, 513 transitions, 7563 flow [2024-06-21 19:08:35,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7563, PETRI_PLACES=345, PETRI_TRANSITIONS=513} [2024-06-21 19:08:35,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 19:08:35,113 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 513 transitions, 7563 flow [2024-06-21 19:08:35,113 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 19:08:35,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:35,113 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 19:08:35,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:08:35,113 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 19:08:35,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 10525517, now seen corresponding path program 1 times [2024-06-21 19:08:35,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:35,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981890379] [2024-06-21 19:08:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:35,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:36,160 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 19:08:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:36,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981890379] [2024-06-21 19:08:36,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981890379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:36,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:36,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903753745] [2024-06-21 19:08:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:36,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:36,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 513 transitions, 7563 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 19:08:36,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:36,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:36,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:38,255 INFO L124 PetriNetUnfolderBase]: 5601/8987 cut-off events. [2024-06-21 19:08:38,255 INFO L125 PetriNetUnfolderBase]: For 933548/933548 co-relation queries the response was YES. [2024-06-21 19:08:38,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72685 conditions, 8987 events. 5601/8987 cut-off events. For 933548/933548 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59745 event pairs, 1728 based on Foata normal form. 1/8987 useless extension candidates. Maximal degree in co-relation 72517. Up to 8642 conditions per place. [2024-06-21 19:08:38,400 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 67 changer transitions 0/542 dead transitions. [2024-06-21 19:08:38,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 542 transitions, 9043 flow [2024-06-21 19:08:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:08:38,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:08:38,401 INFO L175 Difference]: Start difference. First operand has 345 places, 513 transitions, 7563 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:08:38,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 542 transitions, 9043 flow [2024-06-21 19:08:40,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 542 transitions, 8877 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:40,699 INFO L231 Difference]: Finished difference. Result has 347 places, 522 transitions, 7683 flow [2024-06-21 19:08:40,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7683, PETRI_PLACES=347, PETRI_TRANSITIONS=522} [2024-06-21 19:08:40,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 19:08:40,700 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 522 transitions, 7683 flow [2024-06-21 19:08:40,700 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 19:08:40,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:40,700 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 19:08:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:08:40,700 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 19:08:40,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash 10536677, now seen corresponding path program 2 times [2024-06-21 19:08:40,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:40,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416999398] [2024-06-21 19:08:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:40,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:41,738 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 19:08:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:41,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416999398] [2024-06-21 19:08:41,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416999398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:41,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:41,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:41,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74990342] [2024-06-21 19:08:41,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:41,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:41,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:41,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 522 transitions, 7683 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 19:08:41,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:41,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:41,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:43,803 INFO L124 PetriNetUnfolderBase]: 5598/8983 cut-off events. [2024-06-21 19:08:43,804 INFO L125 PetriNetUnfolderBase]: For 948210/948210 co-relation queries the response was YES. [2024-06-21 19:08:43,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72781 conditions, 8983 events. 5598/8983 cut-off events. For 948210/948210 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 59720 event pairs, 1728 based on Foata normal form. 1/8983 useless extension candidates. Maximal degree in co-relation 72612. Up to 8639 conditions per place. [2024-06-21 19:08:43,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 468 selfloop transitions, 69 changer transitions 0/541 dead transitions. [2024-06-21 19:08:43,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 541 transitions, 8839 flow [2024-06-21 19:08:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:08:43,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:08:43,940 INFO L175 Difference]: Start difference. First operand has 347 places, 522 transitions, 7683 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:08:43,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 541 transitions, 8839 flow [2024-06-21 19:08:46,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 541 transitions, 8625 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:46,500 INFO L231 Difference]: Finished difference. Result has 349 places, 522 transitions, 7616 flow [2024-06-21 19:08:46,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7469, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7616, PETRI_PLACES=349, PETRI_TRANSITIONS=522} [2024-06-21 19:08:46,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-21 19:08:46,501 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 522 transitions, 7616 flow [2024-06-21 19:08:46,501 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 19:08:46,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:46,501 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 19:08:46,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:08:46,501 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 19:08:46,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash 924822870, now seen corresponding path program 5 times [2024-06-21 19:08:46,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:46,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827472000] [2024-06-21 19:08:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:47,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:47,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827472000] [2024-06-21 19:08:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827472000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:47,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037047480] [2024-06-21 19:08:47,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:47,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:47,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 522 transitions, 7616 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 19:08:47,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:47,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:47,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:49,635 INFO L124 PetriNetUnfolderBase]: 5610/9000 cut-off events. [2024-06-21 19:08:49,635 INFO L125 PetriNetUnfolderBase]: For 965950/965950 co-relation queries the response was YES. [2024-06-21 19:08:49,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73029 conditions, 9000 events. 5610/9000 cut-off events. For 965950/965950 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59799 event pairs, 1728 based on Foata normal form. 2/9001 useless extension candidates. Maximal degree in co-relation 72859. Up to 8662 conditions per place. [2024-06-21 19:08:49,769 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 484 selfloop transitions, 60 changer transitions 0/548 dead transitions. [2024-06-21 19:08:49,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 548 transitions, 8882 flow [2024-06-21 19:08:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:08:49,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:08:49,770 INFO L175 Difference]: Start difference. First operand has 349 places, 522 transitions, 7616 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:08:49,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 548 transitions, 8882 flow [2024-06-21 19:08:52,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 548 transitions, 8713 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 19:08:52,134 INFO L231 Difference]: Finished difference. Result has 350 places, 529 transitions, 7688 flow [2024-06-21 19:08:52,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7447, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7688, PETRI_PLACES=350, PETRI_TRANSITIONS=529} [2024-06-21 19:08:52,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 19:08:52,135 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 529 transitions, 7688 flow [2024-06-21 19:08:52,135 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 19:08:52,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:52,135 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 19:08:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:08:52,136 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 19:08:52,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1877968056, now seen corresponding path program 1 times [2024-06-21 19:08:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:52,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427703067] [2024-06-21 19:08:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:53,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:53,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427703067] [2024-06-21 19:08:53,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427703067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:53,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:53,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:53,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344672353] [2024-06-21 19:08:53,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:53,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:53,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:53,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:53,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 529 transitions, 7688 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 19:08:53,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:53,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:53,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:55,459 INFO L124 PetriNetUnfolderBase]: 5515/8910 cut-off events. [2024-06-21 19:08:55,459 INFO L125 PetriNetUnfolderBase]: For 984495/984495 co-relation queries the response was YES. [2024-06-21 19:08:55,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72800 conditions, 8910 events. 5515/8910 cut-off events. For 984495/984495 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59889 event pairs, 2444 based on Foata normal form. 2/8907 useless extension candidates. Maximal degree in co-relation 72629. Up to 8522 conditions per place. [2024-06-21 19:08:55,601 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 506 selfloop transitions, 23 changer transitions 0/547 dead transitions. [2024-06-21 19:08:55,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 547 transitions, 8896 flow [2024-06-21 19:08:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 19:08:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 19:08:55,602 INFO L175 Difference]: Start difference. First operand has 350 places, 529 transitions, 7688 flow. Second operand 7 states and 121 transitions. [2024-06-21 19:08:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 547 transitions, 8896 flow [2024-06-21 19:08:58,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 547 transitions, 8717 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:58,175 INFO L231 Difference]: Finished difference. Result has 351 places, 532 transitions, 7637 flow [2024-06-21 19:08:58,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7637, PETRI_PLACES=351, PETRI_TRANSITIONS=532} [2024-06-21 19:08:58,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 19:08:58,176 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 532 transitions, 7637 flow [2024-06-21 19:08:58,176 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 19:08:58,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:58,176 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 19:08:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:08:58,176 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 19:08:58,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1878058421, now seen corresponding path program 1 times [2024-06-21 19:08:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:58,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008464425] [2024-06-21 19:08:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008464425] [2024-06-21 19:08:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008464425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:59,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:59,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479502272] [2024-06-21 19:08:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:59,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:59,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:59,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:59,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:59,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 532 transitions, 7637 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 19:08:59,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:59,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:59,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:01,370 INFO L124 PetriNetUnfolderBase]: 5513/8912 cut-off events. [2024-06-21 19:09:01,370 INFO L125 PetriNetUnfolderBase]: For 996834/996834 co-relation queries the response was YES. [2024-06-21 19:09:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73241 conditions, 8912 events. 5513/8912 cut-off events. For 996834/996834 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 59970 event pairs, 2450 based on Foata normal form. 1/8912 useless extension candidates. Maximal degree in co-relation 73068. Up to 8531 conditions per place. [2024-06-21 19:09:01,513 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 22 changer transitions 0/551 dead transitions. [2024-06-21 19:09:01,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 551 transitions, 8855 flow [2024-06-21 19:09:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:09:01,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:09:01,514 INFO L175 Difference]: Start difference. First operand has 351 places, 532 transitions, 7637 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:09:01,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 551 transitions, 8855 flow [2024-06-21 19:09:04,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 551 transitions, 8759 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 19:09:04,490 INFO L231 Difference]: Finished difference. Result has 355 places, 535 transitions, 7649 flow [2024-06-21 19:09:04,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7543, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7649, PETRI_PLACES=355, PETRI_TRANSITIONS=535} [2024-06-21 19:09:04,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 19:09:04,491 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 535 transitions, 7649 flow [2024-06-21 19:09:04,491 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 19:09:04,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:04,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:09:04,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:09:04,491 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 19:09:04,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1038933880, now seen corresponding path program 2 times [2024-06-21 19:09:04,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:04,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332778924] [2024-06-21 19:09:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:04,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332778924] [2024-06-21 19:09:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332778924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:05,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583162962] [2024-06-21 19:09:05,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:05,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:05,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:05,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 535 transitions, 7649 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 19:09:05,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:05,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:05,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:07,947 INFO L124 PetriNetUnfolderBase]: 5535/8934 cut-off events. [2024-06-21 19:09:07,947 INFO L125 PetriNetUnfolderBase]: For 1000817/1000817 co-relation queries the response was YES. [2024-06-21 19:09:08,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74153 conditions, 8934 events. 5535/8934 cut-off events. For 1000817/1000817 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60000 event pairs, 2430 based on Foata normal form. 1/8930 useless extension candidates. Maximal degree in co-relation 73979. Up to 8535 conditions per place. [2024-06-21 19:09:08,079 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 30 changer transitions 0/550 dead transitions. [2024-06-21 19:09:08,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 550 transitions, 8841 flow [2024-06-21 19:09:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:09:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:09:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 19:09:08,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 19:09:08,081 INFO L175 Difference]: Start difference. First operand has 355 places, 535 transitions, 7649 flow. Second operand 7 states and 121 transitions. [2024-06-21 19:09:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 550 transitions, 8841 flow [2024-06-21 19:09:10,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 550 transitions, 8753 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:10,472 INFO L231 Difference]: Finished difference. Result has 355 places, 538 transitions, 7703 flow [2024-06-21 19:09:10,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7561, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7703, PETRI_PLACES=355, PETRI_TRANSITIONS=538} [2024-06-21 19:09:10,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 19:09:10,473 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 538 transitions, 7703 flow [2024-06-21 19:09:10,473 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 19:09:10,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:10,473 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 19:09:10,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:09:10,473 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:10,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1780859945, now seen corresponding path program 2 times [2024-06-21 19:09:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:10,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455654267] [2024-06-21 19:09:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:10,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:11,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455654267] [2024-06-21 19:09:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455654267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:11,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60350278] [2024-06-21 19:09:11,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:11,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:11,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:11,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 538 transitions, 7703 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 19:09:11,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:11,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:13,728 INFO L124 PetriNetUnfolderBase]: 5539/8948 cut-off events. [2024-06-21 19:09:13,729 INFO L125 PetriNetUnfolderBase]: For 1029383/1029383 co-relation queries the response was YES. [2024-06-21 19:09:13,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75094 conditions, 8948 events. 5539/8948 cut-off events. For 1029383/1029383 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60131 event pairs, 2428 based on Foata normal form. 1/8948 useless extension candidates. Maximal degree in co-relation 74919. Up to 8544 conditions per place. [2024-06-21 19:09:13,868 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 512 selfloop transitions, 38 changer transitions 0/562 dead transitions. [2024-06-21 19:09:13,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 562 transitions, 9439 flow [2024-06-21 19:09:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:09:13,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:09:13,869 INFO L175 Difference]: Start difference. First operand has 355 places, 538 transitions, 7703 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:09:13,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 562 transitions, 9439 flow [2024-06-21 19:09:16,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 562 transitions, 9327 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 19:09:16,437 INFO L231 Difference]: Finished difference. Result has 359 places, 547 transitions, 7879 flow [2024-06-21 19:09:16,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7879, PETRI_PLACES=359, PETRI_TRANSITIONS=547} [2024-06-21 19:09:16,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 19:09:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 547 transitions, 7879 flow [2024-06-21 19:09:16,437 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 19:09:16,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:16,437 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 19:09:16,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:09:16,438 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1780854365, now seen corresponding path program 3 times [2024-06-21 19:09:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:16,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642736920] [2024-06-21 19:09:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:16,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642736920] [2024-06-21 19:09:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642736920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:17,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006050773] [2024-06-21 19:09:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:17,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:17,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 547 transitions, 7879 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 19:09:17,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:17,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:17,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:19,965 INFO L124 PetriNetUnfolderBase]: 5536/8944 cut-off events. [2024-06-21 19:09:19,965 INFO L125 PetriNetUnfolderBase]: For 1050556/1050556 co-relation queries the response was YES. [2024-06-21 19:09:20,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76343 conditions, 8944 events. 5536/8944 cut-off events. For 1050556/1050556 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60173 event pairs, 2428 based on Foata normal form. 1/8944 useless extension candidates. Maximal degree in co-relation 76166. Up to 8541 conditions per place. [2024-06-21 19:09:20,115 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 40 changer transitions 0/561 dead transitions. [2024-06-21 19:09:20,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 561 transitions, 9239 flow [2024-06-21 19:09:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:09:20,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:09:20,116 INFO L175 Difference]: Start difference. First operand has 359 places, 547 transitions, 7879 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:09:20,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 561 transitions, 9239 flow [2024-06-21 19:09:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 561 transitions, 9103 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 19:09:22,987 INFO L231 Difference]: Finished difference. Result has 363 places, 547 transitions, 7829 flow [2024-06-21 19:09:22,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7829, PETRI_PLACES=363, PETRI_TRANSITIONS=547} [2024-06-21 19:09:22,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 19:09:22,988 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 547 transitions, 7829 flow [2024-06-21 19:09:22,988 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 19:09:22,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:22,988 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 19:09:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:09:22,988 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:22,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1541251634, now seen corresponding path program 1 times [2024-06-21 19:09:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224825662] [2024-06-21 19:09:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:24,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224825662] [2024-06-21 19:09:24,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224825662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:24,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:24,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852986059] [2024-06-21 19:09:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:24,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:24,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 547 transitions, 7829 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 19:09:24,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:24,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:24,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:26,253 INFO L124 PetriNetUnfolderBase]: 5541/8958 cut-off events. [2024-06-21 19:09:26,253 INFO L125 PetriNetUnfolderBase]: For 1072345/1072345 co-relation queries the response was YES. [2024-06-21 19:09:26,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76023 conditions, 8958 events. 5541/8958 cut-off events. For 1072345/1072345 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60340 event pairs, 2428 based on Foata normal form. 2/8959 useless extension candidates. Maximal degree in co-relation 75845. Up to 8585 conditions per place. [2024-06-21 19:09:26,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 532 selfloop transitions, 19 changer transitions 0/563 dead transitions. [2024-06-21 19:09:26,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 563 transitions, 9067 flow [2024-06-21 19:09:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:09:26,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 19:09:26,416 INFO L175 Difference]: Start difference. First operand has 363 places, 547 transitions, 7829 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:09:26,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 563 transitions, 9067 flow [2024-06-21 19:09:29,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 563 transitions, 8989 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:09:29,109 INFO L231 Difference]: Finished difference. Result has 366 places, 550 transitions, 7873 flow [2024-06-21 19:09:29,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7873, PETRI_PLACES=366, PETRI_TRANSITIONS=550} [2024-06-21 19:09:29,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 19:09:29,109 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 550 transitions, 7873 flow [2024-06-21 19:09:29,109 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 19:09:29,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:29,110 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 19:09:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:09:29,110 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:29,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash 936091879, now seen corresponding path program 4 times [2024-06-21 19:09:29,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:29,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531739183] [2024-06-21 19:09:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:29,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:30,345 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 19:09:30,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531739183] [2024-06-21 19:09:30,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531739183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:30,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:30,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:30,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674606299] [2024-06-21 19:09:30,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:30,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:30,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:30,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 550 transitions, 7873 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 19:09:30,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:30,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:30,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:32,449 INFO L124 PetriNetUnfolderBase]: 5554/8978 cut-off events. [2024-06-21 19:09:32,449 INFO L125 PetriNetUnfolderBase]: For 1091921/1091923 co-relation queries the response was YES. [2024-06-21 19:09:32,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76722 conditions, 8978 events. 5554/8978 cut-off events. For 1091921/1091923 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60483 event pairs, 2460 based on Foata normal form. 1/8978 useless extension candidates. Maximal degree in co-relation 76543. Up to 8537 conditions per place. [2024-06-21 19:09:32,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 502 selfloop transitions, 58 changer transitions 0/572 dead transitions. [2024-06-21 19:09:32,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 572 transitions, 9831 flow [2024-06-21 19:09:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:09:32,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 19:09:32,594 INFO L175 Difference]: Start difference. First operand has 366 places, 550 transitions, 7873 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:09:32,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 572 transitions, 9831 flow [2024-06-21 19:09:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 572 transitions, 9731 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:36,539 INFO L231 Difference]: Finished difference. Result has 367 places, 559 transitions, 8093 flow [2024-06-21 19:09:36,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8093, PETRI_PLACES=367, PETRI_TRANSITIONS=559} [2024-06-21 19:09:36,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 19:09:36,540 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 559 transitions, 8093 flow [2024-06-21 19:09:36,540 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 19:09:36,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:36,540 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 19:09:36,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:09:36,540 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:36,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1238241622, now seen corresponding path program 2 times [2024-06-21 19:09:36,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:36,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933361536] [2024-06-21 19:09:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:36,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:37,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933361536] [2024-06-21 19:09:37,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933361536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:37,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:37,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421767717] [2024-06-21 19:09:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:37,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:37,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:37,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 559 transitions, 8093 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 19:09:37,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:37,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:37,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:40,161 INFO L124 PetriNetUnfolderBase]: 5564/8986 cut-off events. [2024-06-21 19:09:40,161 INFO L125 PetriNetUnfolderBase]: For 1121715/1121719 co-relation queries the response was YES. [2024-06-21 19:09:40,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77846 conditions, 8986 events. 5564/8986 cut-off events. For 1121715/1121719 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60461 event pairs, 2452 based on Foata normal form. 6/8991 useless extension candidates. Maximal degree in co-relation 77666. Up to 8584 conditions per place. [2024-06-21 19:09:40,278 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 525 selfloop transitions, 39 changer transitions 0/576 dead transitions. [2024-06-21 19:09:40,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 576 transitions, 9625 flow [2024-06-21 19:09:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:09:40,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:09:40,280 INFO L175 Difference]: Start difference. First operand has 367 places, 559 transitions, 8093 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:09:40,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 576 transitions, 9625 flow [2024-06-21 19:09:43,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 576 transitions, 9463 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 19:09:43,345 INFO L231 Difference]: Finished difference. Result has 372 places, 565 transitions, 8181 flow [2024-06-21 19:09:43,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7935, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8181, PETRI_PLACES=372, PETRI_TRANSITIONS=565} [2024-06-21 19:09:43,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 19:09:43,345 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 565 transitions, 8181 flow [2024-06-21 19:09:43,345 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 19:09:43,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:43,346 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 19:09:43,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:09:43,346 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:43,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1238235670, now seen corresponding path program 3 times [2024-06-21 19:09:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:43,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968399663] [2024-06-21 19:09:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968399663] [2024-06-21 19:09:44,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968399663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:44,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:44,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:44,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309825869] [2024-06-21 19:09:44,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:44,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:44,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:44,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 565 transitions, 8181 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 19:09:44,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:44,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:44,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:46,797 INFO L124 PetriNetUnfolderBase]: 5583/9003 cut-off events. [2024-06-21 19:09:46,797 INFO L125 PetriNetUnfolderBase]: For 1132792/1132794 co-relation queries the response was YES. [2024-06-21 19:09:46,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77753 conditions, 9003 events. 5583/9003 cut-off events. For 1132792/1132794 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60499 event pairs, 2462 based on Foata normal form. 1/8999 useless extension candidates. Maximal degree in co-relation 77572. Up to 8578 conditions per place. [2024-06-21 19:09:46,954 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 39 changer transitions 0/577 dead transitions. [2024-06-21 19:09:46,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 9405 flow [2024-06-21 19:09:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:09:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:09:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 19:09:46,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 19:09:46,955 INFO L175 Difference]: Start difference. First operand has 372 places, 565 transitions, 8181 flow. Second operand 7 states and 120 transitions. [2024-06-21 19:09:46,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 9405 flow [2024-06-21 19:09:49,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 577 transitions, 9294 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 19:09:49,759 INFO L231 Difference]: Finished difference. Result has 374 places, 568 transitions, 8244 flow [2024-06-21 19:09:49,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8244, PETRI_PLACES=374, PETRI_TRANSITIONS=568} [2024-06-21 19:09:49,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 19:09:49,759 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 568 transitions, 8244 flow [2024-06-21 19:09:49,760 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 19:09:49,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:49,760 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 19:09:49,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:09:49,760 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:49,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1238235825, now seen corresponding path program 5 times [2024-06-21 19:09:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:49,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381254287] [2024-06-21 19:09:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:50,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:50,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381254287] [2024-06-21 19:09:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381254287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:51,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:51,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012906936] [2024-06-21 19:09:51,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:51,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:51,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 568 transitions, 8244 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 19:09:51,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:51,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:51,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:53,152 INFO L124 PetriNetUnfolderBase]: 5553/8974 cut-off events. [2024-06-21 19:09:53,152 INFO L125 PetriNetUnfolderBase]: For 1145375/1145377 co-relation queries the response was YES. [2024-06-21 19:09:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77935 conditions, 8974 events. 5553/8974 cut-off events. For 1145375/1145377 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60440 event pairs, 2460 based on Foata normal form. 1/8974 useless extension candidates. Maximal degree in co-relation 77752. Up to 8537 conditions per place. [2024-06-21 19:09:53,296 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 59 changer transitions 0/580 dead transitions. [2024-06-21 19:09:53,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 580 transitions, 9836 flow [2024-06-21 19:09:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:09:53,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:09:53,297 INFO L175 Difference]: Start difference. First operand has 374 places, 568 transitions, 8244 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:09:53,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 580 transitions, 9836 flow [2024-06-21 19:09:56,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 580 transitions, 9650 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 19:09:56,969 INFO L231 Difference]: Finished difference. Result has 377 places, 568 transitions, 8182 flow [2024-06-21 19:09:56,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8058, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8182, PETRI_PLACES=377, PETRI_TRANSITIONS=568} [2024-06-21 19:09:56,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 19:09:56,970 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 568 transitions, 8182 flow [2024-06-21 19:09:56,970 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 19:09:56,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:56,970 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 19:09:56,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:09:56,970 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:56,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1209722534, now seen corresponding path program 3 times [2024-06-21 19:09:56,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:56,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727397896] [2024-06-21 19:09:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:56,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727397896] [2024-06-21 19:09:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727397896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:58,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926535723] [2024-06-21 19:09:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:58,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:58,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:58,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:58,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 568 transitions, 8182 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 19:09:58,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:58,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:58,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:00,326 INFO L124 PetriNetUnfolderBase]: 5563/8987 cut-off events. [2024-06-21 19:10:00,326 INFO L125 PetriNetUnfolderBase]: For 1171105/1171109 co-relation queries the response was YES. [2024-06-21 19:10:00,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78240 conditions, 8987 events. 5563/8987 cut-off events. For 1171105/1171109 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60488 event pairs, 2452 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 78056. Up to 8582 conditions per place. [2024-06-21 19:10:00,498 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 527 selfloop transitions, 43 changer transitions 0/582 dead transitions. [2024-06-21 19:10:00,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 582 transitions, 9650 flow [2024-06-21 19:10:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 19:10:00,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 19:10:00,499 INFO L175 Difference]: Start difference. First operand has 377 places, 568 transitions, 8182 flow. Second operand 9 states and 141 transitions. [2024-06-21 19:10:00,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 582 transitions, 9650 flow [2024-06-21 19:10:04,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 582 transitions, 9532 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:04,865 INFO L231 Difference]: Finished difference. Result has 380 places, 571 transitions, 8234 flow [2024-06-21 19:10:04,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8234, PETRI_PLACES=380, PETRI_TRANSITIONS=571} [2024-06-21 19:10:04,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 19:10:04,866 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 571 transitions, 8234 flow [2024-06-21 19:10:04,866 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 19:10:04,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:04,866 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 19:10:04,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:10:04,866 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:04,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:04,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1209722751, now seen corresponding path program 6 times [2024-06-21 19:10:04,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:04,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949275165] [2024-06-21 19:10:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:04,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:06,107 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 19:10:06,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949275165] [2024-06-21 19:10:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949275165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:06,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:06,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255846151] [2024-06-21 19:10:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:06,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:06,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:06,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 571 transitions, 8234 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 19:10:06,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:06,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:06,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:08,631 INFO L124 PetriNetUnfolderBase]: 5555/8979 cut-off events. [2024-06-21 19:10:08,632 INFO L125 PetriNetUnfolderBase]: For 1180154/1180156 co-relation queries the response was YES. [2024-06-21 19:10:08,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78186 conditions, 8979 events. 5555/8979 cut-off events. For 1180154/1180156 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60438 event pairs, 2460 based on Foata normal form. 1/8979 useless extension candidates. Maximal degree in co-relation 78001. Up to 8541 conditions per place. [2024-06-21 19:10:08,755 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 508 selfloop transitions, 62 changer transitions 0/582 dead transitions. [2024-06-21 19:10:08,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 582 transitions, 9626 flow [2024-06-21 19:10:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:10:08,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:10:08,756 INFO L175 Difference]: Start difference. First operand has 380 places, 571 transitions, 8234 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:10:08,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 582 transitions, 9626 flow [2024-06-21 19:10:12,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 582 transitions, 9430 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:12,453 INFO L231 Difference]: Finished difference. Result has 381 places, 571 transitions, 8168 flow [2024-06-21 19:10:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8038, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8168, PETRI_PLACES=381, PETRI_TRANSITIONS=571} [2024-06-21 19:10:12,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 19:10:12,454 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 571 transitions, 8168 flow [2024-06-21 19:10:12,454 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 19:10:12,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:12,454 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 19:10:12,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:10:12,454 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:12,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1245860182, now seen corresponding path program 4 times [2024-06-21 19:10:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:12,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335468269] [2024-06-21 19:10:12,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:12,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:13,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:13,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335468269] [2024-06-21 19:10:13,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335468269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:13,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:13,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:13,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080839979] [2024-06-21 19:10:13,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:13,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:13,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:13,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 571 transitions, 8168 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 19:10:13,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:13,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:13,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:15,957 INFO L124 PetriNetUnfolderBase]: 5554/8975 cut-off events. [2024-06-21 19:10:15,957 INFO L125 PetriNetUnfolderBase]: For 1194508/1194512 co-relation queries the response was YES. [2024-06-21 19:10:16,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78098 conditions, 8975 events. 5554/8975 cut-off events. For 1194508/1194512 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60418 event pairs, 2452 based on Foata normal form. 6/8980 useless extension candidates. Maximal degree in co-relation 77912. Up to 8573 conditions per place. [2024-06-21 19:10:16,118 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 45 changer transitions 0/581 dead transitions. [2024-06-21 19:10:16,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 581 transitions, 9346 flow [2024-06-21 19:10:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:10:16,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:10:16,119 INFO L175 Difference]: Start difference. First operand has 381 places, 571 transitions, 8168 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:10:16,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 581 transitions, 9346 flow [2024-06-21 19:10:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 581 transitions, 9140 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 19:10:20,058 INFO L231 Difference]: Finished difference. Result has 381 places, 571 transitions, 8059 flow [2024-06-21 19:10:20,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7962, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8059, PETRI_PLACES=381, PETRI_TRANSITIONS=571} [2024-06-21 19:10:20,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 19:10:20,058 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 571 transitions, 8059 flow [2024-06-21 19:10:20,059 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 19:10:20,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:20,059 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 19:10:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:10:20,059 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:20,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1209445704, now seen corresponding path program 1 times [2024-06-21 19:10:20,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:20,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890281079] [2024-06-21 19:10:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890281079] [2024-06-21 19:10:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890281079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:10:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444211359] [2024-06-21 19:10:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:10:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:10:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:10:21,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:21,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 571 transitions, 8059 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:21,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:21,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:21,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:24,128 INFO L124 PetriNetUnfolderBase]: 5406/8706 cut-off events. [2024-06-21 19:10:24,129 INFO L125 PetriNetUnfolderBase]: For 1211344/1211370 co-relation queries the response was YES. [2024-06-21 19:10:24,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76695 conditions, 8706 events. 5406/8706 cut-off events. For 1211344/1211370 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58345 event pairs, 2388 based on Foata normal form. 5/8622 useless extension candidates. Maximal degree in co-relation 76508. Up to 8332 conditions per place. [2024-06-21 19:10:24,282 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 22 changer transitions 0/586 dead transitions. [2024-06-21 19:10:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 586 transitions, 9260 flow [2024-06-21 19:10:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:10:24,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:10:24,283 INFO L175 Difference]: Start difference. First operand has 381 places, 571 transitions, 8059 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:10:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 586 transitions, 9260 flow [2024-06-21 19:10:27,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 586 transitions, 9160 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:27,729 INFO L231 Difference]: Finished difference. Result has 384 places, 575 transitions, 8102 flow [2024-06-21 19:10:27,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7959, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8102, PETRI_PLACES=384, PETRI_TRANSITIONS=575} [2024-06-21 19:10:27,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 19:10:27,729 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 575 transitions, 8102 flow [2024-06-21 19:10:27,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:27,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:27,730 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 19:10:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:10:27,730 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:27,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash -689241670, now seen corresponding path program 1 times [2024-06-21 19:10:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:27,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470327754] [2024-06-21 19:10:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:28,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:28,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470327754] [2024-06-21 19:10:28,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470327754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:28,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:28,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206595991] [2024-06-21 19:10:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:28,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:28,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:28,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:28,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 575 transitions, 8102 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 19:10:28,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:28,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:28,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:30,956 INFO L124 PetriNetUnfolderBase]: 5583/9005 cut-off events. [2024-06-21 19:10:30,956 INFO L125 PetriNetUnfolderBase]: For 1226282/1226282 co-relation queries the response was YES. [2024-06-21 19:10:31,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78846 conditions, 9005 events. 5583/9005 cut-off events. For 1226282/1226282 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60427 event pairs, 1755 based on Foata normal form. 1/9001 useless extension candidates. Maximal degree in co-relation 78657. Up to 8546 conditions per place. [2024-06-21 19:10:31,114 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 521 selfloop transitions, 50 changer transitions 0/596 dead transitions. [2024-06-21 19:10:31,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 596 transitions, 9396 flow [2024-06-21 19:10:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:10:31,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:10:31,115 INFO L175 Difference]: Start difference. First operand has 384 places, 575 transitions, 8102 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:10:31,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 596 transitions, 9396 flow [2024-06-21 19:10:35,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 596 transitions, 9239 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:35,372 INFO L231 Difference]: Finished difference. Result has 386 places, 578 transitions, 8146 flow [2024-06-21 19:10:35,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7945, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8146, PETRI_PLACES=386, PETRI_TRANSITIONS=578} [2024-06-21 19:10:35,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 19:10:35,373 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 578 transitions, 8146 flow [2024-06-21 19:10:35,373 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 19:10:35,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:35,373 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 19:10:35,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:10:35,373 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:35,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash -683527750, now seen corresponding path program 2 times [2024-06-21 19:10:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:35,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268026972] [2024-06-21 19:10:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:35,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:36,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:36,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268026972] [2024-06-21 19:10:36,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268026972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:36,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:36,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:36,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407712407] [2024-06-21 19:10:36,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:36,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:36,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:36,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:36,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 578 transitions, 8146 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 19:10:36,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:36,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:36,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:38,664 INFO L124 PetriNetUnfolderBase]: 5593/9020 cut-off events. [2024-06-21 19:10:38,664 INFO L125 PetriNetUnfolderBase]: For 1248893/1248893 co-relation queries the response was YES. [2024-06-21 19:10:38,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79610 conditions, 9020 events. 5593/9020 cut-off events. For 1248893/1248893 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60490 event pairs, 1754 based on Foata normal form. 1/9013 useless extension candidates. Maximal degree in co-relation 79421. Up to 8547 conditions per place. [2024-06-21 19:10:38,823 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 59 changer transitions 0/603 dead transitions. [2024-06-21 19:10:38,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 603 transitions, 9496 flow [2024-06-21 19:10:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:10:38,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:10:38,824 INFO L175 Difference]: Start difference. First operand has 386 places, 578 transitions, 8146 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:10:38,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 603 transitions, 9496 flow [2024-06-21 19:10:43,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 603 transitions, 9334 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:43,923 INFO L231 Difference]: Finished difference. Result has 390 places, 584 transitions, 8263 flow [2024-06-21 19:10:43,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8263, PETRI_PLACES=390, PETRI_TRANSITIONS=584} [2024-06-21 19:10:43,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 19:10:43,923 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 584 transitions, 8263 flow [2024-06-21 19:10:43,924 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 19:10:43,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:43,924 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 19:10:43,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:10:43,924 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:43,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash -573771754, now seen corresponding path program 1 times [2024-06-21 19:10:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:43,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689470866] [2024-06-21 19:10:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:44,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:44,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689470866] [2024-06-21 19:10:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689470866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:44,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:44,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804473906] [2024-06-21 19:10:44,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:44,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:44,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 584 transitions, 8263 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 19:10:44,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:44,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:44,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:47,153 INFO L124 PetriNetUnfolderBase]: 5598/9031 cut-off events. [2024-06-21 19:10:47,153 INFO L125 PetriNetUnfolderBase]: For 1276450/1276454 co-relation queries the response was YES. [2024-06-21 19:10:47,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80354 conditions, 9031 events. 5598/9031 cut-off events. For 1276450/1276454 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60754 event pairs, 1903 based on Foata normal form. 3/9029 useless extension candidates. Maximal degree in co-relation 80163. Up to 8453 conditions per place. [2024-06-21 19:10:47,301 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 71 changer transitions 0/615 dead transitions. [2024-06-21 19:10:47,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 615 transitions, 9683 flow [2024-06-21 19:10:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:10:47,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 19:10:47,302 INFO L175 Difference]: Start difference. First operand has 390 places, 584 transitions, 8263 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:10:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 615 transitions, 9683 flow [2024-06-21 19:10:51,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 615 transitions, 9481 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:51,399 INFO L231 Difference]: Finished difference. Result has 393 places, 594 transitions, 8363 flow [2024-06-21 19:10:51,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8363, PETRI_PLACES=393, PETRI_TRANSITIONS=594} [2024-06-21 19:10:51,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 19:10:51,400 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 594 transitions, 8363 flow [2024-06-21 19:10:51,400 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 19:10:51,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:51,400 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 19:10:51,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:10:51,400 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:51,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -573950500, now seen corresponding path program 3 times [2024-06-21 19:10:51,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:51,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123051385] [2024-06-21 19:10:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:51,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123051385] [2024-06-21 19:10:52,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123051385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:52,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:52,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:52,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503567461] [2024-06-21 19:10:52,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:52,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:52,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:52,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 594 transitions, 8363 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 19:10:52,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:52,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:52,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:54,752 INFO L124 PetriNetUnfolderBase]: 5603/9039 cut-off events. [2024-06-21 19:10:54,753 INFO L125 PetriNetUnfolderBase]: For 1301414/1301418 co-relation queries the response was YES. [2024-06-21 19:10:54,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81990 conditions, 9039 events. 5603/9039 cut-off events. For 1301414/1301418 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60709 event pairs, 1618 based on Foata normal form. 5/9039 useless extension candidates. Maximal degree in co-relation 81797. Up to 8464 conditions per place. [2024-06-21 19:10:54,901 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 91 changer transitions 0/614 dead transitions. [2024-06-21 19:10:54,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 614 transitions, 9703 flow [2024-06-21 19:10:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:10:54,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:10:54,903 INFO L175 Difference]: Start difference. First operand has 393 places, 594 transitions, 8363 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:10:54,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 614 transitions, 9703 flow [2024-06-21 19:10:59,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 614 transitions, 9538 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:59,384 INFO L231 Difference]: Finished difference. Result has 397 places, 597 transitions, 8494 flow [2024-06-21 19:10:59,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8198, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8494, PETRI_PLACES=397, PETRI_TRANSITIONS=597} [2024-06-21 19:10:59,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 19:10:59,385 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 597 transitions, 8494 flow [2024-06-21 19:10:59,385 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 19:10:59,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:59,385 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 19:10:59,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 19:10:59,386 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:59,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash 732082930, now seen corresponding path program 2 times [2024-06-21 19:10:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:59,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914315650] [2024-06-21 19:10:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914315650] [2024-06-21 19:11:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914315650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:00,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:00,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951310660] [2024-06-21 19:11:00,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:00,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:00,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:00,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 597 transitions, 8494 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 19:11:00,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:00,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:00,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:02,808 INFO L124 PetriNetUnfolderBase]: 5616/9064 cut-off events. [2024-06-21 19:11:02,808 INFO L125 PetriNetUnfolderBase]: For 1335052/1335056 co-relation queries the response was YES. [2024-06-21 19:11:02,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82954 conditions, 9064 events. 5616/9064 cut-off events. For 1335052/1335056 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 61087 event pairs, 1892 based on Foata normal form. 3/9062 useless extension candidates. Maximal degree in co-relation 82760. Up to 8454 conditions per place. [2024-06-21 19:11:02,967 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 515 selfloop transitions, 82 changer transitions 0/622 dead transitions. [2024-06-21 19:11:02,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 622 transitions, 10152 flow [2024-06-21 19:11:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:11:02,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 19:11:02,968 INFO L175 Difference]: Start difference. First operand has 397 places, 597 transitions, 8494 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:11:02,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 622 transitions, 10152 flow [2024-06-21 19:11:07,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 622 transitions, 9882 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:07,729 INFO L231 Difference]: Finished difference. Result has 399 places, 603 transitions, 8570 flow [2024-06-21 19:11:07,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8570, PETRI_PLACES=399, PETRI_TRANSITIONS=603} [2024-06-21 19:11:07,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 19:11:07,730 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 603 transitions, 8570 flow [2024-06-21 19:11:07,730 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 19:11:07,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:07,730 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 19:11:07,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 19:11:07,730 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:07,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 561380314, now seen corresponding path program 4 times [2024-06-21 19:11:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228224903] [2024-06-21 19:11:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:08,789 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 19:11:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228224903] [2024-06-21 19:11:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228224903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:08,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189055153] [2024-06-21 19:11:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:08,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:08,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:08,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 603 transitions, 8570 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 19:11:08,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:08,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:08,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:11,087 INFO L124 PetriNetUnfolderBase]: 5619/9062 cut-off events. [2024-06-21 19:11:11,087 INFO L125 PetriNetUnfolderBase]: For 1365162/1365166 co-relation queries the response was YES. [2024-06-21 19:11:11,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84359 conditions, 9062 events. 5619/9062 cut-off events. For 1365162/1365166 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60789 event pairs, 1597 based on Foata normal form. 5/9062 useless extension candidates. Maximal degree in co-relation 84163. Up to 8462 conditions per place. [2024-06-21 19:11:11,263 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 493 selfloop transitions, 103 changer transitions 0/621 dead transitions. [2024-06-21 19:11:11,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 621 transitions, 9926 flow [2024-06-21 19:11:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:11:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 19:11:11,265 INFO L175 Difference]: Start difference. First operand has 399 places, 603 transitions, 8570 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:11:11,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 621 transitions, 9926 flow [2024-06-21 19:11:15,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 621 transitions, 9773 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 19:11:15,460 INFO L231 Difference]: Finished difference. Result has 404 places, 606 transitions, 8745 flow [2024-06-21 19:11:15,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8417, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8745, PETRI_PLACES=404, PETRI_TRANSITIONS=606} [2024-06-21 19:11:15,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 19:11:15,460 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 606 transitions, 8745 flow [2024-06-21 19:11:15,460 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 19:11:15,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:15,461 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 19:11:15,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 19:11:15,461 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:15,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash -878353538, now seen corresponding path program 1 times [2024-06-21 19:11:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:15,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954888999] [2024-06-21 19:11:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:15,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954888999] [2024-06-21 19:11:16,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954888999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:16,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:16,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876461662] [2024-06-21 19:11:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:16,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:11:16,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 606 transitions, 8745 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 19:11:16,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:16,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:11:16,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:18,936 INFO L124 PetriNetUnfolderBase]: 5713/9158 cut-off events. [2024-06-21 19:11:18,936 INFO L125 PetriNetUnfolderBase]: For 1389364/1389370 co-relation queries the response was YES. [2024-06-21 19:11:19,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85886 conditions, 9158 events. 5713/9158 cut-off events. For 1389364/1389370 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 61093 event pairs, 1956 based on Foata normal form. 7/9164 useless extension candidates. Maximal degree in co-relation 85688. Up to 8828 conditions per place. [2024-06-21 19:11:19,116 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 572 selfloop transitions, 48 changer transitions 0/624 dead transitions. [2024-06-21 19:11:19,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 624 transitions, 10123 flow [2024-06-21 19:11:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:11:19,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:11:19,117 INFO L175 Difference]: Start difference. First operand has 404 places, 606 transitions, 8745 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:11:19,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 624 transitions, 10123 flow [2024-06-21 19:11:23,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 624 transitions, 9821 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:23,323 INFO L231 Difference]: Finished difference. Result has 405 places, 609 transitions, 8635 flow [2024-06-21 19:11:23,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8635, PETRI_PLACES=405, PETRI_TRANSITIONS=609} [2024-06-21 19:11:23,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 19:11:23,324 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 609 transitions, 8635 flow [2024-06-21 19:11:23,324 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 19:11:23,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:23,324 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 19:11:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 19:11:23,325 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:23,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 738391864, now seen corresponding path program 5 times [2024-06-21 19:11:23,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022217916] [2024-06-21 19:11:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022217916] [2024-06-21 19:11:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022217916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:24,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:24,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189521969] [2024-06-21 19:11:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:24,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:24,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 609 transitions, 8635 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 19:11:24,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:24,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:24,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:26,979 INFO L124 PetriNetUnfolderBase]: 5641/9082 cut-off events. [2024-06-21 19:11:26,979 INFO L125 PetriNetUnfolderBase]: For 1413039/1413039 co-relation queries the response was YES. [2024-06-21 19:11:27,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85806 conditions, 9082 events. 5641/9082 cut-off events. For 1413039/1413039 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 60809 event pairs, 1648 based on Foata normal form. 1/9078 useless extension candidates. Maximal degree in co-relation 85607. Up to 8626 conditions per place. [2024-06-21 19:11:27,162 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 54 changer transitions 0/625 dead transitions. [2024-06-21 19:11:27,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 625 transitions, 9999 flow [2024-06-21 19:11:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:11:27,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:11:27,164 INFO L175 Difference]: Start difference. First operand has 405 places, 609 transitions, 8635 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:11:27,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 625 transitions, 9999 flow [2024-06-21 19:11:31,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 625 transitions, 9833 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:31,754 INFO L231 Difference]: Finished difference. Result has 407 places, 612 transitions, 8706 flow [2024-06-21 19:11:31,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8469, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8706, PETRI_PLACES=407, PETRI_TRANSITIONS=612} [2024-06-21 19:11:31,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-21 19:11:31,755 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 612 transitions, 8706 flow [2024-06-21 19:11:31,755 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 19:11:31,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:31,755 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 19:11:31,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 19:11:31,755 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:31,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 738512206, now seen corresponding path program 2 times [2024-06-21 19:11:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150785236] [2024-06-21 19:11:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150785236] [2024-06-21 19:11:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150785236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:32,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:32,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949981305] [2024-06-21 19:11:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:32,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:32,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:11:32,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 612 transitions, 8706 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 19:11:32,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:32,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:11:32,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:35,156 INFO L124 PetriNetUnfolderBase]: 5739/9196 cut-off events. [2024-06-21 19:11:35,156 INFO L125 PetriNetUnfolderBase]: For 1453070/1453076 co-relation queries the response was YES. [2024-06-21 19:11:35,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87498 conditions, 9196 events. 5739/9196 cut-off events. For 1453070/1453076 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 61374 event pairs, 1958 based on Foata normal form. 7/9202 useless extension candidates. Maximal degree in co-relation 87298. Up to 8823 conditions per place. [2024-06-21 19:11:35,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 566 selfloop transitions, 71 changer transitions 0/641 dead transitions. [2024-06-21 19:11:35,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 641 transitions, 10826 flow [2024-06-21 19:11:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:11:35,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:11:35,321 INFO L175 Difference]: Start difference. First operand has 407 places, 612 transitions, 8706 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:11:35,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 641 transitions, 10826 flow [2024-06-21 19:11:40,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 641 transitions, 10587 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:40,144 INFO L231 Difference]: Finished difference. Result has 410 places, 626 transitions, 8992 flow [2024-06-21 19:11:40,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8992, PETRI_PLACES=410, PETRI_TRANSITIONS=626} [2024-06-21 19:11:40,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 19:11:40,144 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 626 transitions, 8992 flow [2024-06-21 19:11:40,145 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 19:11:40,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:40,145 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 19:11:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 19:11:40,145 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:40,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash -396282928, now seen corresponding path program 3 times [2024-06-21 19:11:40,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:40,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113617048] [2024-06-21 19:11:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113617048] [2024-06-21 19:11:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113617048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:41,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:41,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:41,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265473059] [2024-06-21 19:11:41,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:41,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:41,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:11:41,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 626 transitions, 8992 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 19:11:41,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:41,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:11:41,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:43,606 INFO L124 PetriNetUnfolderBase]: 5736/9192 cut-off events. [2024-06-21 19:11:43,606 INFO L125 PetriNetUnfolderBase]: For 1470883/1470889 co-relation queries the response was YES. [2024-06-21 19:11:43,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87798 conditions, 9192 events. 5736/9192 cut-off events. For 1470883/1470889 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 61330 event pairs, 1958 based on Foata normal form. 7/9198 useless extension candidates. Maximal degree in co-relation 87597. Up to 8820 conditions per place. [2024-06-21 19:11:43,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 76 changer transitions 0/640 dead transitions. [2024-06-21 19:11:43,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 640 transitions, 10550 flow [2024-06-21 19:11:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:11:43,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:11:43,775 INFO L175 Difference]: Start difference. First operand has 410 places, 626 transitions, 8992 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:11:43,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 640 transitions, 10550 flow [2024-06-21 19:11:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 640 transitions, 10331 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-21 19:11:48,497 INFO L231 Difference]: Finished difference. Result has 415 places, 626 transitions, 8932 flow [2024-06-21 19:11:48,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8932, PETRI_PLACES=415, PETRI_TRANSITIONS=626} [2024-06-21 19:11:48,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 19:11:48,498 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 626 transitions, 8932 flow [2024-06-21 19:11:48,498 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 19:11:48,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:48,498 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 19:11:48,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 19:11:48,498 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:48,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash -396520450, now seen corresponding path program 6 times [2024-06-21 19:11:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894437673] [2024-06-21 19:11:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:49,636 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 19:11:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894437673] [2024-06-21 19:11:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894437673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:49,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:49,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512005482] [2024-06-21 19:11:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:49,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:49,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 626 transitions, 8932 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 19:11:49,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:49,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:49,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:52,084 INFO L124 PetriNetUnfolderBase]: 5674/9124 cut-off events. [2024-06-21 19:11:52,084 INFO L125 PetriNetUnfolderBase]: For 1504240/1504244 co-relation queries the response was YES. [2024-06-21 19:11:52,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88007 conditions, 9124 events. 5674/9124 cut-off events. For 1504240/1504244 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60977 event pairs, 1565 based on Foata normal form. 5/9124 useless extension candidates. Maximal degree in co-relation 87804. Up to 8467 conditions per place. [2024-06-21 19:11:52,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 133 changer transitions 0/646 dead transitions. [2024-06-21 19:11:52,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 646 transitions, 10698 flow [2024-06-21 19:11:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:11:52,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 19:11:52,253 INFO L175 Difference]: Start difference. First operand has 415 places, 626 transitions, 8932 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:11:52,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 646 transitions, 10698 flow [2024-06-21 19:11:57,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 646 transitions, 10551 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:57,098 INFO L231 Difference]: Finished difference. Result has 417 places, 632 transitions, 9312 flow [2024-06-21 19:11:57,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8785, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9312, PETRI_PLACES=417, PETRI_TRANSITIONS=632} [2024-06-21 19:11:57,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 19:11:57,099 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 632 transitions, 9312 flow [2024-06-21 19:11:57,099 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 19:11:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:57,099 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 19:11:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 19:11:57,099 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:57,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -396520264, now seen corresponding path program 3 times [2024-06-21 19:11:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:57,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320327218] [2024-06-21 19:11:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:58,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320327218] [2024-06-21 19:11:58,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320327218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:58,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:58,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:58,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598026816] [2024-06-21 19:11:58,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:58,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:58,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:58,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:58,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:58,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 632 transitions, 9312 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 19:11:58,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:58,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:58,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:00,720 INFO L124 PetriNetUnfolderBase]: 5703/9186 cut-off events. [2024-06-21 19:12:00,720 INFO L125 PetriNetUnfolderBase]: For 1558930/1558934 co-relation queries the response was YES. [2024-06-21 19:12:00,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89756 conditions, 9186 events. 5703/9186 cut-off events. For 1558930/1558934 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61874 event pairs, 1897 based on Foata normal form. 3/9184 useless extension candidates. Maximal degree in co-relation 89552. Up to 8503 conditions per place. [2024-06-21 19:12:00,890 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 528 selfloop transitions, 100 changer transitions 0/659 dead transitions. [2024-06-21 19:12:00,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 659 transitions, 11410 flow [2024-06-21 19:12:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:12:00,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:12:00,892 INFO L175 Difference]: Start difference. First operand has 417 places, 632 transitions, 9312 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:12:00,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 659 transitions, 11410 flow [2024-06-21 19:12:06,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 659 transitions, 11174 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-21 19:12:06,441 INFO L231 Difference]: Finished difference. Result has 422 places, 641 transitions, 9555 flow [2024-06-21 19:12:06,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9076, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9555, PETRI_PLACES=422, PETRI_TRANSITIONS=641} [2024-06-21 19:12:06,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 19:12:06,442 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 641 transitions, 9555 flow [2024-06-21 19:12:06,442 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 19:12:06,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:06,443 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 19:12:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 19:12:06,443 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:06,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash -692101606, now seen corresponding path program 1 times [2024-06-21 19:12:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:06,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772036568] [2024-06-21 19:12:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:07,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:07,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772036568] [2024-06-21 19:12:07,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772036568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:07,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:07,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293112729] [2024-06-21 19:12:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:07,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:07,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 641 transitions, 9555 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 19:12:07,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:07,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:07,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:10,701 INFO L124 PetriNetUnfolderBase]: 5711/9183 cut-off events. [2024-06-21 19:12:10,701 INFO L125 PetriNetUnfolderBase]: For 1601451/1601451 co-relation queries the response was YES. [2024-06-21 19:12:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91433 conditions, 9183 events. 5711/9183 cut-off events. For 1601451/1601451 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 61614 event pairs, 1677 based on Foata normal form. 2/9175 useless extension candidates. Maximal degree in co-relation 91227. Up to 8672 conditions per place. [2024-06-21 19:12:10,864 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 589 selfloop transitions, 45 changer transitions 0/665 dead transitions. [2024-06-21 19:12:10,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 665 transitions, 10982 flow [2024-06-21 19:12:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:12:10,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 19:12:10,866 INFO L175 Difference]: Start difference. First operand has 422 places, 641 transitions, 9555 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:12:10,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 665 transitions, 10982 flow [2024-06-21 19:12:16,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 665 transitions, 10795 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 19:12:16,696 INFO L231 Difference]: Finished difference. Result has 427 places, 643 transitions, 9542 flow [2024-06-21 19:12:16,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9368, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9542, PETRI_PLACES=427, PETRI_TRANSITIONS=643} [2024-06-21 19:12:16,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-21 19:12:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 643 transitions, 9542 flow [2024-06-21 19:12:16,697 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 19:12:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:16,697 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 19:12:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 19:12:16,697 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:16,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash 451501558, now seen corresponding path program 2 times [2024-06-21 19:12:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548686704] [2024-06-21 19:12:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:17,812 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 19:12:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548686704] [2024-06-21 19:12:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548686704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:17,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:17,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956062761] [2024-06-21 19:12:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:17,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:17,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 643 transitions, 9542 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 19:12:17,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:17,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:17,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:21,069 INFO L124 PetriNetUnfolderBase]: 5719/9196 cut-off events. [2024-06-21 19:12:21,069 INFO L125 PetriNetUnfolderBase]: For 1618924/1618924 co-relation queries the response was YES. [2024-06-21 19:12:21,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91511 conditions, 9196 events. 5719/9196 cut-off events. For 1618924/1618924 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 61624 event pairs, 1710 based on Foata normal form. 2/9190 useless extension candidates. Maximal degree in co-relation 91303. Up to 8737 conditions per place. [2024-06-21 19:12:21,225 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 588 selfloop transitions, 43 changer transitions 0/662 dead transitions. [2024-06-21 19:12:21,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 662 transitions, 10942 flow [2024-06-21 19:12:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 19:12:21,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 19:12:21,226 INFO L175 Difference]: Start difference. First operand has 427 places, 643 transitions, 9542 flow. Second operand 9 states and 147 transitions. [2024-06-21 19:12:21,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 662 transitions, 10942 flow [2024-06-21 19:12:26,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 662 transitions, 10776 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:12:26,063 INFO L231 Difference]: Finished difference. Result has 429 places, 645 transitions, 9548 flow [2024-06-21 19:12:26,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9548, PETRI_PLACES=429, PETRI_TRANSITIONS=645} [2024-06-21 19:12:26,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 19:12:26,064 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 645 transitions, 9548 flow [2024-06-21 19:12:26,064 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 19:12:26,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:26,064 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 19:12:26,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 19:12:26,064 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:26,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash -396643396, now seen corresponding path program 3 times [2024-06-21 19:12:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510944344] [2024-06-21 19:12:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510944344] [2024-06-21 19:12:27,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510944344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:27,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:27,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708530367] [2024-06-21 19:12:27,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:27,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:27,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:27,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 645 transitions, 9548 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 19:12:27,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:27,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:30,379 INFO L124 PetriNetUnfolderBase]: 5727/9205 cut-off events. [2024-06-21 19:12:30,380 INFO L125 PetriNetUnfolderBase]: For 1646267/1646267 co-relation queries the response was YES. [2024-06-21 19:12:30,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91876 conditions, 9205 events. 5727/9205 cut-off events. For 1646267/1646267 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 61689 event pairs, 1646 based on Foata normal form. 2/9202 useless extension candidates. Maximal degree in co-relation 91667. Up to 8737 conditions per place. [2024-06-21 19:12:30,526 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 577 selfloop transitions, 53 changer transitions 0/661 dead transitions. [2024-06-21 19:12:30,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 661 transitions, 10940 flow [2024-06-21 19:12:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:12:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:12:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:12:30,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:12:30,528 INFO L175 Difference]: Start difference. First operand has 429 places, 645 transitions, 9548 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:12:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 661 transitions, 10940 flow [2024-06-21 19:12:35,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 661 transitions, 10779 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 19:12:35,775 INFO L231 Difference]: Finished difference. Result has 430 places, 647 transitions, 9583 flow [2024-06-21 19:12:35,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9387, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9583, PETRI_PLACES=430, PETRI_TRANSITIONS=647} [2024-06-21 19:12:35,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 19:12:35,776 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 647 transitions, 9583 flow [2024-06-21 19:12:35,776 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 19:12:35,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:35,776 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 19:12:35,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 19:12:35,776 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:35,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash -396274000, now seen corresponding path program 1 times [2024-06-21 19:12:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422330765] [2024-06-21 19:12:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:37,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:37,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422330765] [2024-06-21 19:12:37,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422330765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:37,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:37,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:12:37,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494506592] [2024-06-21 19:12:37,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:37,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:12:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:12:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:12:37,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:12:37,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 647 transitions, 9583 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:37,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:37,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:12:37,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:40,064 INFO L124 PetriNetUnfolderBase]: 5588/8977 cut-off events. [2024-06-21 19:12:40,064 INFO L125 PetriNetUnfolderBase]: For 1662774/1662806 co-relation queries the response was YES. [2024-06-21 19:12:40,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90643 conditions, 8977 events. 5588/8977 cut-off events. For 1662774/1662806 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60039 event pairs, 1619 based on Foata normal form. 10/8919 useless extension candidates. Maximal degree in co-relation 90433. Up to 8409 conditions per place. [2024-06-21 19:12:40,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 512 selfloop transitions, 94 changer transitions 0/667 dead transitions. [2024-06-21 19:12:40,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 667 transitions, 11193 flow [2024-06-21 19:12:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:12:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:12:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 19:12:40,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:12:40,242 INFO L175 Difference]: Start difference. First operand has 430 places, 647 transitions, 9583 flow. Second operand 8 states and 144 transitions. [2024-06-21 19:12:40,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 667 transitions, 11193 flow [2024-06-21 19:12:46,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 667 transitions, 10998 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 19:12:46,123 INFO L231 Difference]: Finished difference. Result has 431 places, 650 transitions, 9669 flow [2024-06-21 19:12:46,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9388, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9669, PETRI_PLACES=431, PETRI_TRANSITIONS=650} [2024-06-21 19:12:46,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-21 19:12:46,124 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 650 transitions, 9669 flow [2024-06-21 19:12:46,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:46,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:46,124 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 19:12:46,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 19:12:46,124 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:46,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2146003976, now seen corresponding path program 7 times [2024-06-21 19:12:46,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:46,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120049038] [2024-06-21 19:12:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:46,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120049038] [2024-06-21 19:12:47,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120049038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:47,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:47,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:47,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600245482] [2024-06-21 19:12:47,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:47,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:47,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:47,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:47,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 650 transitions, 9669 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 19:12:47,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:47,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:47,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:50,200 INFO L124 PetriNetUnfolderBase]: 5745/9232 cut-off events. [2024-06-21 19:12:50,200 INFO L125 PetriNetUnfolderBase]: For 1679490/1679490 co-relation queries the response was YES. [2024-06-21 19:12:50,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93079 conditions, 9232 events. 5745/9232 cut-off events. For 1679490/1679490 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 61737 event pairs, 1547 based on Foata normal form. 1/9228 useless extension candidates. Maximal degree in co-relation 92869. Up to 8652 conditions per place. [2024-06-21 19:12:50,350 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 94 changer transitions 0/670 dead transitions. [2024-06-21 19:12:50,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 670 transitions, 11139 flow [2024-06-21 19:12:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:12:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:12:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:12:50,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 19:12:50,351 INFO L175 Difference]: Start difference. First operand has 431 places, 650 transitions, 9669 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:12:50,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 670 transitions, 11139 flow [2024-06-21 19:12:57,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 670 transitions, 10758 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-21 19:12:57,340 INFO L231 Difference]: Finished difference. Result has 430 places, 653 transitions, 9605 flow [2024-06-21 19:12:57,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9288, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9605, PETRI_PLACES=430, PETRI_TRANSITIONS=653} [2024-06-21 19:12:57,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 19:12:57,340 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 653 transitions, 9605 flow [2024-06-21 19:12:57,340 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 19:12:57,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:57,341 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 19:12:57,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 19:12:57,341 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:57,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2145894422, now seen corresponding path program 4 times [2024-06-21 19:12:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181640955] [2024-06-21 19:12:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:58,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:58,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181640955] [2024-06-21 19:12:58,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181640955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:58,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:58,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:58,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542466554] [2024-06-21 19:12:58,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:58,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:58,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:58,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:58,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:58,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 653 transitions, 9605 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 19:12:58,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:58,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:58,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:01,171 INFO L124 PetriNetUnfolderBase]: 5749/9246 cut-off events. [2024-06-21 19:13:01,171 INFO L125 PetriNetUnfolderBase]: For 1704788/1704792 co-relation queries the response was YES. [2024-06-21 19:13:01,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93239 conditions, 9246 events. 5749/9246 cut-off events. For 1704788/1704792 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 62193 event pairs, 1880 based on Foata normal form. 5/9246 useless extension candidates. Maximal degree in co-relation 93028. Up to 8654 conditions per place. [2024-06-21 19:13:01,325 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 75 changer transitions 0/682 dead transitions. [2024-06-21 19:13:01,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 682 transitions, 11196 flow [2024-06-21 19:13:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:13:01,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 19:13:01,327 INFO L175 Difference]: Start difference. First operand has 430 places, 653 transitions, 9605 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:13:01,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 682 transitions, 11196 flow [2024-06-21 19:13:06,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 682 transitions, 10909 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:06,969 INFO L231 Difference]: Finished difference. Result has 434 places, 661 transitions, 9643 flow [2024-06-21 19:13:06,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9643, PETRI_PLACES=434, PETRI_TRANSITIONS=661} [2024-06-21 19:13:06,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 19:13:06,970 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 661 transitions, 9643 flow [2024-06-21 19:13:06,970 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 19:13:06,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:06,970 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 19:13:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 19:13:06,970 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:06,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1921171724, now seen corresponding path program 5 times [2024-06-21 19:13:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61619083] [2024-06-21 19:13:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61619083] [2024-06-21 19:13:07,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61619083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:07,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:07,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:07,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768893721] [2024-06-21 19:13:07,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:07,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:08,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:13:08,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 661 transitions, 9643 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 19:13:08,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:08,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:13:08,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand