./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix030_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix030_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix030_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix030_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:49:27,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:49:27,882 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:49:27,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:49:27,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:49:27,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:49:27,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:49:27,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:49:27,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:49:27,919 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:49:27,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:49:27,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:49:27,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:49:27,921 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:49:27,921 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:49:27,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:49:27,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:49:27,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:49:27,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:49:27,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:49:27,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:49:27,923 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:49:27,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:49:27,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:49:27,923 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:49:27,924 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:49:27,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:49:27,924 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:49:27,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:49:27,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:49:27,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:49:27,926 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:49:27,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:49:27,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:49:27,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:49:27,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:49:27,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:49:27,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:49:27,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:49:27,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:49:27,927 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:49:27,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:49:27,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:49:27,928 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:49:28,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:49:28,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:49:28,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:49:28,162 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:49:28,162 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:49:28,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix030_tso.i [2024-06-21 18:49:29,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:49:29,316 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:49:29,322 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix030_tso.i [2024-06-21 18:49:29,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b9c7e5e/b5bf9b052835485d991215c49497ca5c/FLAG39dcb4fd6 [2024-06-21 18:49:29,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b9c7e5e/b5bf9b052835485d991215c49497ca5c [2024-06-21 18:49:29,351 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:49:29,351 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:49:29,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix030_tso.yml/witness.yml [2024-06-21 18:49:29,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:49:29,434 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:49:29,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:49:29,435 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:49:29,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:49:29,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:49:29" (1/2) ... [2024-06-21 18:49:29,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485e4ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:49:29, skipping insertion in model container [2024-06-21 18:49:29,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:49:29" (1/2) ... [2024-06-21 18:49:29,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@789571e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:49:29, skipping insertion in model container [2024-06-21 18:49:29,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:49:29" (2/2) ... [2024-06-21 18:49:29,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485e4ab0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:29, skipping insertion in model container [2024-06-21 18:49:29,443 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:49:29" (2/2) ... [2024-06-21 18:49:29,443 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:49:29,463 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:49:29,466 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:49:29,466 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:49:29,466 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:49:29,467 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:49:29,467 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:49:29,468 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-21 18:49:29,515 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:49:29,790 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:49:29,798 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:49:29,980 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:49:30,012 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:49:30,013 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30 WrapperNode [2024-06-21 18:49:30,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:49:30,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:49:30,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:49:30,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:49:30,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,085 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 178 [2024-06-21 18:49:30,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:49:30,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:49:30,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:49:30,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:49:30,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,098 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,129 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:49:30,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,164 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:49:30,172 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:49:30,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:49:30,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:49:30,173 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (1/1) ... [2024-06-21 18:49:30,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:49:30,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:49:30,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:49:30,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:49:30,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:49:30,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:49:30,240 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:49:30,240 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:49:30,240 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:49:30,240 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:49:30,240 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:49:30,241 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:49:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 18:49:30,241 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 18:49:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:49:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:49:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:49:30,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:49:30,246 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:49:30,374 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:49:30,375 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:49:30,787 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:49:30,788 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:49:30,980 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:49:30,980 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:49:30,981 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:49:30 BoogieIcfgContainer [2024-06-21 18:49:30,981 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:49:30,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:49:30,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:49:30,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:49:30,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:49:29" (1/4) ... [2024-06-21 18:49:30,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6fe1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:49:30, skipping insertion in model container [2024-06-21 18:49:30,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:49:29" (2/4) ... [2024-06-21 18:49:30,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6fe1f0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:49:30, skipping insertion in model container [2024-06-21 18:49:30,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:49:30" (3/4) ... [2024-06-21 18:49:30,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6fe1f0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:49:30, skipping insertion in model container [2024-06-21 18:49:30,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:49:30" (4/4) ... [2024-06-21 18:49:30,994 INFO L112 eAbstractionObserver]: Analyzing ICFG mix030_tso.i [2024-06-21 18:49:31,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:49:31,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 18:49:31,009 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:49:31,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:49:31,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 18:49:31,125 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 18:49:31,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:49:31,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:49:31,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 18:49:31,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 18:49:31,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:49:31,149 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;@571f1e24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:49:31,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 18:49:31,154 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:49:31,154 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:49:31,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:49:31,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:31,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:49:31,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:31,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:31,162 INFO L85 PathProgramCache]: Analyzing trace with hash 415950207, now seen corresponding path program 1 times [2024-06-21 18:49:31,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:31,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258425481] [2024-06-21 18:49:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:31,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:32,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258425481] [2024-06-21 18:49:32,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258425481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:32,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:32,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:49:32,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060882205] [2024-06-21 18:49:32,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:49:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:49:32,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:49:32,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:49:32,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:32,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:32,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:49:32,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:33,765 INFO L124 PetriNetUnfolderBase]: 9547/13262 cut-off events. [2024-06-21 18:49:33,766 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-21 18:49:33,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26594 conditions, 13262 events. 9547/13262 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72332 event pairs, 7308 based on Foata normal form. 1/12895 useless extension candidates. Maximal degree in co-relation 26581. Up to 12953 conditions per place. [2024-06-21 18:49:33,849 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 43 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 18:49:33,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 229 flow [2024-06-21 18:49:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:49:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:49:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-06-21 18:49:33,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 18:49:33,861 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 94 transitions. [2024-06-21 18:49:33,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 229 flow [2024-06-21 18:49:33,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:33,869 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 18:49:33,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 18:49:33,874 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 18:49:33,874 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 18:49:33,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:33,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:33,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:33,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:49:33,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:33,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:33,876 INFO L85 PathProgramCache]: Analyzing trace with hash 296245598, now seen corresponding path program 1 times [2024-06-21 18:49:33,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:33,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066139381] [2024-06-21 18:49:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:33,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:34,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066139381] [2024-06-21 18:49:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066139381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:34,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:49:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710333410] [2024-06-21 18:49:34,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:49:34,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:49:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:49:34,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:49:34,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:49:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:36,078 INFO L124 PetriNetUnfolderBase]: 10932/14851 cut-off events. [2024-06-21 18:49:36,079 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2024-06-21 18:49:36,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33864 conditions, 14851 events. 10932/14851 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 78424 event pairs, 7512 based on Foata normal form. 4/14847 useless extension candidates. Maximal degree in co-relation 33852. Up to 14763 conditions per place. [2024-06-21 18:49:36,154 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 18:49:36,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 323 flow [2024-06-21 18:49:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:49:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:49:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-21 18:49:36,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721153846153846 [2024-06-21 18:49:36,158 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 119 transitions. [2024-06-21 18:49:36,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 323 flow [2024-06-21 18:49:36,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:49:36,162 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 18:49:36,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 18:49:36,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 18:49:36,164 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 18:49:36,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:36,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:36,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:36,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:49:36,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:36,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 593680732, now seen corresponding path program 1 times [2024-06-21 18:49:36,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029530977] [2024-06-21 18:49:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:36,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:36,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029530977] [2024-06-21 18:49:36,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029530977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:36,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:36,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:49:36,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621074998] [2024-06-21 18:49:36,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:36,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:49:36,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:49:36,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:49:37,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:49:37,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:37,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:37,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:49:37,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:38,530 INFO L124 PetriNetUnfolderBase]: 10950/14932 cut-off events. [2024-06-21 18:49:38,530 INFO L125 PetriNetUnfolderBase]: For 8377/8377 co-relation queries the response was YES. [2024-06-21 18:49:38,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37812 conditions, 14932 events. 10950/14932 cut-off events. For 8377/8377 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 79556 event pairs, 5910 based on Foata normal form. 7/14934 useless extension candidates. Maximal degree in co-relation 37798. Up to 14684 conditions per place. [2024-06-21 18:49:38,632 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-21 18:49:38,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 539 flow [2024-06-21 18:49:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:49:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:49:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-21 18:49:38,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 18:49:38,634 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 156 transitions. [2024-06-21 18:49:38,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 539 flow [2024-06-21 18:49:38,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:38,638 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-21 18:49:38,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-21 18:49:38,639 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-21 18:49:38,639 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-21 18:49:38,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:38,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:38,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:38,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:49:38,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:38,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash -706381971, now seen corresponding path program 1 times [2024-06-21 18:49:38,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:38,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55829969] [2024-06-21 18:49:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:38,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:39,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:39,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55829969] [2024-06-21 18:49:39,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55829969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:39,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:39,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:39,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292807630] [2024-06-21 18:49:39,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:39,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:39,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:49:39,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:39,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:39,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:49:39,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:41,113 INFO L124 PetriNetUnfolderBase]: 10979/14975 cut-off events. [2024-06-21 18:49:41,113 INFO L125 PetriNetUnfolderBase]: For 20001/20007 co-relation queries the response was YES. [2024-06-21 18:49:41,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44206 conditions, 14975 events. 10979/14975 cut-off events. For 20001/20007 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 79785 event pairs, 4819 based on Foata normal form. 18/14988 useless extension candidates. Maximal degree in co-relation 44189. Up to 14649 conditions per place. [2024-06-21 18:49:41,189 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 79 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-21 18:49:41,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 684 flow [2024-06-21 18:49:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 18:49:41,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:49:41,191 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 180 transitions. [2024-06-21 18:49:41,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 684 flow [2024-06-21 18:49:41,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 672 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 18:49:41,197 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 387 flow [2024-06-21 18:49:41,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-21 18:49:41,198 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-21 18:49:41,198 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 387 flow [2024-06-21 18:49:41,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:41,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:41,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:41,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:49:41,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:41,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:41,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1878928106, now seen corresponding path program 1 times [2024-06-21 18:49:41,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:41,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114423715] [2024-06-21 18:49:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:41,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:42,098 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 18:49:42,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:42,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114423715] [2024-06-21 18:49:42,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114423715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:42,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:42,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:49:42,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174961732] [2024-06-21 18:49:42,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:42,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:49:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:49:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:49:42,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:49:42,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:42,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:42,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:49:42,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:43,470 INFO L124 PetriNetUnfolderBase]: 9575/13373 cut-off events. [2024-06-21 18:49:43,471 INFO L125 PetriNetUnfolderBase]: For 25662/25662 co-relation queries the response was YES. [2024-06-21 18:49:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42754 conditions, 13373 events. 9575/13373 cut-off events. For 25662/25662 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74082 event pairs, 4948 based on Foata normal form. 3/13206 useless extension candidates. Maximal degree in co-relation 42733. Up to 12980 conditions per place. [2024-06-21 18:49:43,559 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 66 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-21 18:49:43,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 599 flow [2024-06-21 18:49:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:49:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:49:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 18:49:43,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-21 18:49:43,564 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 387 flow. Second operand 5 states and 123 transitions. [2024-06-21 18:49:43,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 599 flow [2024-06-21 18:49:43,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 528 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:43,575 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 372 flow [2024-06-21 18:49:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 18:49:43,578 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-21 18:49:43,578 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 372 flow [2024-06-21 18:49:43,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:43,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:43,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:43,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:49:43,579 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:43,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1882541740, now seen corresponding path program 1 times [2024-06-21 18:49:43,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:43,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339699646] [2024-06-21 18:49:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339699646] [2024-06-21 18:49:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339699646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:44,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:44,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:44,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064046361] [2024-06-21 18:49:44,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:44,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:44,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:49:44,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:44,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:44,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:49:44,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:46,000 INFO L124 PetriNetUnfolderBase]: 9587/13402 cut-off events. [2024-06-21 18:49:46,001 INFO L125 PetriNetUnfolderBase]: For 29619/29619 co-relation queries the response was YES. [2024-06-21 18:49:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43525 conditions, 13402 events. 9587/13402 cut-off events. For 29619/29619 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 73834 event pairs, 4728 based on Foata normal form. 5/13258 useless extension candidates. Maximal degree in co-relation 43500. Up to 12930 conditions per place. [2024-06-21 18:49:46,092 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 79 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2024-06-21 18:49:46,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 770 flow [2024-06-21 18:49:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 18:49:46,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 18:49:46,093 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 372 flow. Second operand 6 states and 154 transitions. [2024-06-21 18:49:46,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 770 flow [2024-06-21 18:49:46,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 746 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:46,107 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 528 flow [2024-06-21 18:49:46,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-21 18:49:46,109 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-21 18:49:46,109 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 528 flow [2024-06-21 18:49:46,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:46,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:46,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:46,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:49:46,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:46,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1061699955, now seen corresponding path program 1 times [2024-06-21 18:49:46,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:46,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695697062] [2024-06-21 18:49:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:47,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695697062] [2024-06-21 18:49:47,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695697062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:47,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:47,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352443204] [2024-06-21 18:49:47,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:47,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:47,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:47,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:47,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:47,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:48,967 INFO L124 PetriNetUnfolderBase]: 11131/15151 cut-off events. [2024-06-21 18:49:48,967 INFO L125 PetriNetUnfolderBase]: For 53884/53896 co-relation queries the response was YES. [2024-06-21 18:49:48,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55789 conditions, 15151 events. 11131/15151 cut-off events. For 53884/53896 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 79562 event pairs, 5716 based on Foata normal form. 14/15151 useless extension candidates. Maximal degree in co-relation 55760. Up to 14851 conditions per place. [2024-06-21 18:49:49,054 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 90 selfloop transitions, 38 changer transitions 0/134 dead transitions. [2024-06-21 18:49:49,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 1072 flow [2024-06-21 18:49:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 18:49:49,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:49:49,055 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 528 flow. Second operand 6 states and 156 transitions. [2024-06-21 18:49:49,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 1072 flow [2024-06-21 18:49:49,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 1059 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 18:49:49,091 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 748 flow [2024-06-21 18:49:49,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-06-21 18:49:49,092 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-21 18:49:49,093 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 748 flow [2024-06-21 18:49:49,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:49,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:49,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:49,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:49:49,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:49,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1763604747, now seen corresponding path program 2 times [2024-06-21 18:49:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:49,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944282244] [2024-06-21 18:49:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:50,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:50,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944282244] [2024-06-21 18:49:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944282244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:50,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22023242] [2024-06-21 18:49:50,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:50,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:50,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 748 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:50,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:50,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:50,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:52,005 INFO L124 PetriNetUnfolderBase]: 11116/15112 cut-off events. [2024-06-21 18:49:52,006 INFO L125 PetriNetUnfolderBase]: For 60121/60123 co-relation queries the response was YES. [2024-06-21 18:49:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56577 conditions, 15112 events. 11116/15112 cut-off events. For 60121/60123 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 79109 event pairs, 5718 based on Foata normal form. 5/15100 useless extension candidates. Maximal degree in co-relation 56542. Up to 14836 conditions per place. [2024-06-21 18:49:52,123 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 81 selfloop transitions, 42 changer transitions 0/129 dead transitions. [2024-06-21 18:49:52,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 1120 flow [2024-06-21 18:49:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 18:49:52,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-21 18:49:52,125 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 748 flow. Second operand 6 states and 151 transitions. [2024-06-21 18:49:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 1120 flow [2024-06-21 18:49:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 1078 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 18:49:52,168 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 813 flow [2024-06-21 18:49:52,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=813, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-21 18:49:52,170 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 18:49:52,170 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 813 flow [2024-06-21 18:49:52,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:52,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:49:52,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -699940205, now seen corresponding path program 3 times [2024-06-21 18:49:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99610483] [2024-06-21 18:49:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:52,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:52,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99610483] [2024-06-21 18:49:52,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99610483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:52,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:52,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509471185] [2024-06-21 18:49:52,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:52,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:52,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:53,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:53,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 813 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:53,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:53,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:55,006 INFO L124 PetriNetUnfolderBase]: 11227/15273 cut-off events. [2024-06-21 18:49:55,006 INFO L125 PetriNetUnfolderBase]: For 70474/70488 co-relation queries the response was YES. [2024-06-21 18:49:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58729 conditions, 15273 events. 11227/15273 cut-off events. For 70474/70488 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 80128 event pairs, 5694 based on Foata normal form. 16/15284 useless extension candidates. Maximal degree in co-relation 58690. Up to 14913 conditions per place. [2024-06-21 18:49:55,093 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 92 selfloop transitions, 60 changer transitions 0/158 dead transitions. [2024-06-21 18:49:55,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1446 flow [2024-06-21 18:49:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:49:55,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 18:49:55,095 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 813 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:49:55,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1446 flow [2024-06-21 18:49:55,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1355 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:55,130 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 1134 flow [2024-06-21 18:49:55,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2024-06-21 18:49:55,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-21 18:49:55,131 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 1134 flow [2024-06-21 18:49:55,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:55,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:55,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:55,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:49:55,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:55,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1447038241, now seen corresponding path program 1 times [2024-06-21 18:49:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:55,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312595378] [2024-06-21 18:49:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:56,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:56,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312595378] [2024-06-21 18:49:56,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312595378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:56,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:56,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:56,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008926382] [2024-06-21 18:49:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:56,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:56,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 1134 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:56,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:56,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:56,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:58,453 INFO L124 PetriNetUnfolderBase]: 11605/15818 cut-off events. [2024-06-21 18:49:58,453 INFO L125 PetriNetUnfolderBase]: For 87671/87676 co-relation queries the response was YES. [2024-06-21 18:49:58,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62652 conditions, 15818 events. 11605/15818 cut-off events. For 87671/87676 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 84088 event pairs, 4745 based on Foata normal form. 14/15806 useless extension candidates. Maximal degree in co-relation 62609. Up to 14765 conditions per place. [2024-06-21 18:49:58,540 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 119 selfloop transitions, 69 changer transitions 0/194 dead transitions. [2024-06-21 18:49:58,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 194 transitions, 1996 flow [2024-06-21 18:49:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 18:49:58,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-21 18:49:58,542 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 1134 flow. Second operand 7 states and 188 transitions. [2024-06-21 18:49:58,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 194 transitions, 1996 flow [2024-06-21 18:49:58,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 194 transitions, 1942 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:58,603 INFO L231 Difference]: Finished difference. Result has 99 places, 145 transitions, 1443 flow [2024-06-21 18:49:58,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=99, PETRI_TRANSITIONS=145} [2024-06-21 18:49:58,604 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 18:49:58,604 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 145 transitions, 1443 flow [2024-06-21 18:49:58,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:58,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:58,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:58,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:49:58,605 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:58,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1163066363, now seen corresponding path program 2 times [2024-06-21 18:49:58,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:58,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299774649] [2024-06-21 18:49:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:59,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:59,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299774649] [2024-06-21 18:49:59,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299774649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:59,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:59,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563861559] [2024-06-21 18:49:59,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:59,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:59,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:59,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 145 transitions, 1443 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:59,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:59,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:59,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:01,893 INFO L124 PetriNetUnfolderBase]: 11794/16097 cut-off events. [2024-06-21 18:50:01,893 INFO L125 PetriNetUnfolderBase]: For 121935/121943 co-relation queries the response was YES. [2024-06-21 18:50:01,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72168 conditions, 16097 events. 11794/16097 cut-off events. For 121935/121943 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 85766 event pairs, 4726 based on Foata normal form. 11/16074 useless extension candidates. Maximal degree in co-relation 72121. Up to 14916 conditions per place. [2024-06-21 18:50:02,025 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 106 selfloop transitions, 101 changer transitions 0/213 dead transitions. [2024-06-21 18:50:02,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 213 transitions, 2414 flow [2024-06-21 18:50:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 18:50:02,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-21 18:50:02,026 INFO L175 Difference]: Start difference. First operand has 99 places, 145 transitions, 1443 flow. Second operand 7 states and 186 transitions. [2024-06-21 18:50:02,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 213 transitions, 2414 flow [2024-06-21 18:50:02,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 213 transitions, 2364 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 18:50:02,128 INFO L231 Difference]: Finished difference. Result has 108 places, 170 transitions, 1990 flow [2024-06-21 18:50:02,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1990, PETRI_PLACES=108, PETRI_TRANSITIONS=170} [2024-06-21 18:50:02,129 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 18:50:02,129 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 170 transitions, 1990 flow [2024-06-21 18:50:02,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:02,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:02,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:02,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:50:02,129 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash 941184173, now seen corresponding path program 3 times [2024-06-21 18:50:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048321253] [2024-06-21 18:50:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:02,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:03,276 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 18:50:03,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048321253] [2024-06-21 18:50:03,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048321253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:03,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:03,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910153381] [2024-06-21 18:50:03,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:03,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:03,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:03,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 170 transitions, 1990 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:03,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:03,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:03,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:05,374 INFO L124 PetriNetUnfolderBase]: 11783/16079 cut-off events. [2024-06-21 18:50:05,374 INFO L125 PetriNetUnfolderBase]: For 156800/156808 co-relation queries the response was YES. [2024-06-21 18:50:05,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78554 conditions, 16079 events. 11783/16079 cut-off events. For 156800/156808 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 85771 event pairs, 4734 based on Foata normal form. 11/16053 useless extension candidates. Maximal degree in co-relation 78500. Up to 14912 conditions per place. [2024-06-21 18:50:05,504 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 118 selfloop transitions, 95 changer transitions 0/219 dead transitions. [2024-06-21 18:50:05,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 219 transitions, 2824 flow [2024-06-21 18:50:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 18:50:05,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-21 18:50:05,510 INFO L175 Difference]: Start difference. First operand has 108 places, 170 transitions, 1990 flow. Second operand 7 states and 185 transitions. [2024-06-21 18:50:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 219 transitions, 2824 flow [2024-06-21 18:50:05,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 219 transitions, 2768 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-21 18:50:05,667 INFO L231 Difference]: Finished difference. Result has 115 places, 174 transitions, 2224 flow [2024-06-21 18:50:05,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2224, PETRI_PLACES=115, PETRI_TRANSITIONS=174} [2024-06-21 18:50:05,667 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-21 18:50:05,668 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 174 transitions, 2224 flow [2024-06-21 18:50:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:05,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:05,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:05,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:50:05,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:05,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash -217052243, now seen corresponding path program 4 times [2024-06-21 18:50:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556959516] [2024-06-21 18:50:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:06,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:06,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556959516] [2024-06-21 18:50:06,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556959516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:06,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:06,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:06,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611418443] [2024-06-21 18:50:06,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:06,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:06,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:06,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 174 transitions, 2224 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:06,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:06,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:06,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:08,931 INFO L124 PetriNetUnfolderBase]: 12331/16883 cut-off events. [2024-06-21 18:50:08,931 INFO L125 PetriNetUnfolderBase]: For 171030/171038 co-relation queries the response was YES. [2024-06-21 18:50:09,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84150 conditions, 16883 events. 12331/16883 cut-off events. For 171030/171038 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 91118 event pairs, 4738 based on Foata normal form. 16/16888 useless extension candidates. Maximal degree in co-relation 84091. Up to 15318 conditions per place. [2024-06-21 18:50:09,078 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 147 selfloop transitions, 123 changer transitions 0/276 dead transitions. [2024-06-21 18:50:09,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 276 transitions, 3856 flow [2024-06-21 18:50:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 18:50:09,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-21 18:50:09,080 INFO L175 Difference]: Start difference. First operand has 115 places, 174 transitions, 2224 flow. Second operand 8 states and 214 transitions. [2024-06-21 18:50:09,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 276 transitions, 3856 flow [2024-06-21 18:50:09,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 276 transitions, 3630 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:09,272 INFO L231 Difference]: Finished difference. Result has 123 places, 210 transitions, 2868 flow [2024-06-21 18:50:09,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2868, PETRI_PLACES=123, PETRI_TRANSITIONS=210} [2024-06-21 18:50:09,273 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-21 18:50:09,273 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 210 transitions, 2868 flow [2024-06-21 18:50:09,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:09,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:09,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:09,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:50:09,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:09,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1163075291, now seen corresponding path program 1 times [2024-06-21 18:50:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:09,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391812376] [2024-06-21 18:50:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:09,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391812376] [2024-06-21 18:50:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391812376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:10,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:10,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750586360] [2024-06-21 18:50:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:10,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:10,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:50:10,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 210 transitions, 2868 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:10,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:10,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:50:10,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:12,658 INFO L124 PetriNetUnfolderBase]: 10956/15249 cut-off events. [2024-06-21 18:50:12,658 INFO L125 PetriNetUnfolderBase]: For 170182/170187 co-relation queries the response was YES. [2024-06-21 18:50:12,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78828 conditions, 15249 events. 10956/15249 cut-off events. For 170182/170187 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 83971 event pairs, 4080 based on Foata normal form. 12/15182 useless extension candidates. Maximal degree in co-relation 78764. Up to 14692 conditions per place. [2024-06-21 18:50:12,796 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 214 selfloop transitions, 28 changer transitions 0/249 dead transitions. [2024-06-21 18:50:12,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 249 transitions, 3620 flow [2024-06-21 18:50:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 18:50:12,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-21 18:50:12,799 INFO L175 Difference]: Start difference. First operand has 123 places, 210 transitions, 2868 flow. Second operand 8 states and 190 transitions. [2024-06-21 18:50:12,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 249 transitions, 3620 flow [2024-06-21 18:50:12,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 249 transitions, 3414 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:13,000 INFO L231 Difference]: Finished difference. Result has 126 places, 214 transitions, 2797 flow [2024-06-21 18:50:13,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2797, PETRI_PLACES=126, PETRI_TRANSITIONS=214} [2024-06-21 18:50:13,002 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 18:50:13,003 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 214 transitions, 2797 flow [2024-06-21 18:50:13,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:13,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:13,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:13,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:50:13,003 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:13,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1700970920, now seen corresponding path program 1 times [2024-06-21 18:50:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:13,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226814545] [2024-06-21 18:50:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:13,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:13,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:13,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226814545] [2024-06-21 18:50:13,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226814545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:13,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:13,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:50:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725820023] [2024-06-21 18:50:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:13,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:50:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:50:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:50:13,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:50:13,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 214 transitions, 2797 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:13,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:13,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:50:13,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:15,775 INFO L124 PetriNetUnfolderBase]: 10949/15236 cut-off events. [2024-06-21 18:50:15,776 INFO L125 PetriNetUnfolderBase]: For 186743/186745 co-relation queries the response was YES. [2024-06-21 18:50:15,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80003 conditions, 15236 events. 10949/15236 cut-off events. For 186743/186745 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 83783 event pairs, 4237 based on Foata normal form. 2/15157 useless extension candidates. Maximal degree in co-relation 79940. Up to 14807 conditions per place. [2024-06-21 18:50:15,929 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 208 selfloop transitions, 12 changer transitions 0/227 dead transitions. [2024-06-21 18:50:15,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 227 transitions, 3277 flow [2024-06-21 18:50:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:50:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:50:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 18:50:15,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-21 18:50:15,930 INFO L175 Difference]: Start difference. First operand has 126 places, 214 transitions, 2797 flow. Second operand 5 states and 119 transitions. [2024-06-21 18:50:15,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 227 transitions, 3277 flow [2024-06-21 18:50:16,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 227 transitions, 3161 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:16,092 INFO L231 Difference]: Finished difference. Result has 124 places, 214 transitions, 2716 flow [2024-06-21 18:50:16,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2716, PETRI_PLACES=124, PETRI_TRANSITIONS=214} [2024-06-21 18:50:16,092 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-21 18:50:16,092 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 214 transitions, 2716 flow [2024-06-21 18:50:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:16,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:16,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:16,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:50:16,093 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:16,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1908516755, now seen corresponding path program 1 times [2024-06-21 18:50:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:16,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292319074] [2024-06-21 18:50:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:17,186 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 18:50:17,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:17,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292319074] [2024-06-21 18:50:17,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292319074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:17,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:17,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:17,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360325515] [2024-06-21 18:50:17,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:17,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:17,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:17,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 214 transitions, 2716 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:17,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:17,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:17,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:19,610 INFO L124 PetriNetUnfolderBase]: 12426/17052 cut-off events. [2024-06-21 18:50:19,610 INFO L125 PetriNetUnfolderBase]: For 231812/231825 co-relation queries the response was YES. [2024-06-21 18:50:19,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90088 conditions, 17052 events. 12426/17052 cut-off events. For 231812/231825 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 92248 event pairs, 4887 based on Foata normal form. 21/17046 useless extension candidates. Maximal degree in co-relation 90025. Up to 15423 conditions per place. [2024-06-21 18:50:19,769 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 140 selfloop transitions, 133 changer transitions 0/279 dead transitions. [2024-06-21 18:50:19,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 279 transitions, 3964 flow [2024-06-21 18:50:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 18:50:19,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-21 18:50:19,771 INFO L175 Difference]: Start difference. First operand has 124 places, 214 transitions, 2716 flow. Second operand 7 states and 188 transitions. [2024-06-21 18:50:19,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 279 transitions, 3964 flow [2024-06-21 18:50:19,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 279 transitions, 3947 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:19,961 INFO L231 Difference]: Finished difference. Result has 130 places, 232 transitions, 3356 flow [2024-06-21 18:50:19,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3356, PETRI_PLACES=130, PETRI_TRANSITIONS=232} [2024-06-21 18:50:19,962 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 18:50:19,962 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 232 transitions, 3356 flow [2024-06-21 18:50:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:19,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:19,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:50:19,963 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:19,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1908511175, now seen corresponding path program 2 times [2024-06-21 18:50:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516148094] [2024-06-21 18:50:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:21,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516148094] [2024-06-21 18:50:21,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516148094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:21,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:21,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:21,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923903792] [2024-06-21 18:50:21,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:21,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:21,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:21,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:21,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 232 transitions, 3356 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:21,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:21,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:21,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:23,547 INFO L124 PetriNetUnfolderBase]: 12508/17182 cut-off events. [2024-06-21 18:50:23,547 INFO L125 PetriNetUnfolderBase]: For 269347/269364 co-relation queries the response was YES. [2024-06-21 18:50:23,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96339 conditions, 17182 events. 12508/17182 cut-off events. For 269347/269364 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 93168 event pairs, 4873 based on Foata normal form. 25/17180 useless extension candidates. Maximal degree in co-relation 96271. Up to 15503 conditions per place. [2024-06-21 18:50:23,731 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 137 selfloop transitions, 140 changer transitions 0/283 dead transitions. [2024-06-21 18:50:23,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 283 transitions, 4440 flow [2024-06-21 18:50:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 18:50:23,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-06-21 18:50:23,733 INFO L175 Difference]: Start difference. First operand has 130 places, 232 transitions, 3356 flow. Second operand 7 states and 184 transitions. [2024-06-21 18:50:23,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 283 transitions, 4440 flow [2024-06-21 18:50:23,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 283 transitions, 4269 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:23,986 INFO L231 Difference]: Finished difference. Result has 134 places, 241 transitions, 3633 flow [2024-06-21 18:50:23,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3633, PETRI_PLACES=134, PETRI_TRANSITIONS=241} [2024-06-21 18:50:23,986 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 18:50:23,986 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 241 transitions, 3633 flow [2024-06-21 18:50:23,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:23,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:23,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:23,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:50:23,987 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:23,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1695320221, now seen corresponding path program 3 times [2024-06-21 18:50:23,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:23,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150758398] [2024-06-21 18:50:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:23,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:25,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150758398] [2024-06-21 18:50:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150758398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:25,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565943831] [2024-06-21 18:50:25,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:25,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:25,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 241 transitions, 3633 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:25,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:25,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:25,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:27,550 INFO L124 PetriNetUnfolderBase]: 12546/17265 cut-off events. [2024-06-21 18:50:27,551 INFO L125 PetriNetUnfolderBase]: For 302712/302788 co-relation queries the response was YES. [2024-06-21 18:50:27,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98827 conditions, 17265 events. 12546/17265 cut-off events. For 302712/302788 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 94039 event pairs, 4893 based on Foata normal form. 62/17273 useless extension candidates. Maximal degree in co-relation 98756. Up to 15550 conditions per place. [2024-06-21 18:50:27,709 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 132 selfloop transitions, 157 changer transitions 0/295 dead transitions. [2024-06-21 18:50:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 295 transitions, 4771 flow [2024-06-21 18:50:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 18:50:27,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 18:50:27,722 INFO L175 Difference]: Start difference. First operand has 134 places, 241 transitions, 3633 flow. Second operand 7 states and 180 transitions. [2024-06-21 18:50:27,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 295 transitions, 4771 flow [2024-06-21 18:50:28,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 295 transitions, 4564 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:28,019 INFO L231 Difference]: Finished difference. Result has 139 places, 256 transitions, 4101 flow [2024-06-21 18:50:28,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4101, PETRI_PLACES=139, PETRI_TRANSITIONS=256} [2024-06-21 18:50:28,019 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-21 18:50:28,019 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 256 transitions, 4101 flow [2024-06-21 18:50:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:28,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:28,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:28,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:50:28,020 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:28,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1868460655, now seen corresponding path program 4 times [2024-06-21 18:50:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:28,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058083625] [2024-06-21 18:50:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058083625] [2024-06-21 18:50:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058083625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:28,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:28,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:28,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433547956] [2024-06-21 18:50:28,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:28,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:29,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:29,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 256 transitions, 4101 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:29,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:29,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:29,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:31,781 INFO L124 PetriNetUnfolderBase]: 12835/17686 cut-off events. [2024-06-21 18:50:31,781 INFO L125 PetriNetUnfolderBase]: For 344037/344054 co-relation queries the response was YES. [2024-06-21 18:50:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106053 conditions, 17686 events. 12835/17686 cut-off events. For 344037/344054 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 96432 event pairs, 4858 based on Foata normal form. 21/17696 useless extension candidates. Maximal degree in co-relation 105978. Up to 15782 conditions per place. [2024-06-21 18:50:31,962 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 165 selfloop transitions, 191 changer transitions 0/362 dead transitions. [2024-06-21 18:50:31,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 362 transitions, 6329 flow [2024-06-21 18:50:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 18:50:31,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-21 18:50:31,964 INFO L175 Difference]: Start difference. First operand has 139 places, 256 transitions, 4101 flow. Second operand 8 states and 213 transitions. [2024-06-21 18:50:31,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 362 transitions, 6329 flow [2024-06-21 18:50:32,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 362 transitions, 6214 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-21 18:50:32,348 INFO L231 Difference]: Finished difference. Result has 147 places, 301 transitions, 5419 flow [2024-06-21 18:50:32,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5419, PETRI_PLACES=147, PETRI_TRANSITIONS=301} [2024-06-21 18:50:32,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-21 18:50:32,349 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 301 transitions, 5419 flow [2024-06-21 18:50:32,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:32,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:32,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:32,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:50:32,349 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:32,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash -5052323, now seen corresponding path program 5 times [2024-06-21 18:50:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:32,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180307330] [2024-06-21 18:50:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:32,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:33,229 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 18:50:33,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180307330] [2024-06-21 18:50:33,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180307330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:33,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:33,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:33,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353124407] [2024-06-21 18:50:33,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:33,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:33,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:33,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 301 transitions, 5419 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:33,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:33,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:33,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:36,220 INFO L124 PetriNetUnfolderBase]: 12964/17889 cut-off events. [2024-06-21 18:50:36,221 INFO L125 PetriNetUnfolderBase]: For 376409/376448 co-relation queries the response was YES. [2024-06-21 18:50:36,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110737 conditions, 17889 events. 12964/17889 cut-off events. For 376409/376448 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 97951 event pairs, 4860 based on Foata normal form. 43/17921 useless extension candidates. Maximal degree in co-relation 110658. Up to 15882 conditions per place. [2024-06-21 18:50:36,416 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 163 selfloop transitions, 206 changer transitions 0/375 dead transitions. [2024-06-21 18:50:36,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 375 transitions, 7062 flow [2024-06-21 18:50:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 18:50:36,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:50:36,418 INFO L175 Difference]: Start difference. First operand has 147 places, 301 transitions, 5419 flow. Second operand 8 states and 208 transitions. [2024-06-21 18:50:36,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 375 transitions, 7062 flow [2024-06-21 18:50:36,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 375 transitions, 6667 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:36,971 INFO L231 Difference]: Finished difference. Result has 152 places, 325 transitions, 6093 flow [2024-06-21 18:50:36,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=152, PETRI_TRANSITIONS=325} [2024-06-21 18:50:36,971 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-21 18:50:36,972 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 325 transitions, 6093 flow [2024-06-21 18:50:36,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:36,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:36,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:36,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:50:36,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:36,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1190489650, now seen corresponding path program 1 times [2024-06-21 18:50:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784421575] [2024-06-21 18:50:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:38,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:38,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784421575] [2024-06-21 18:50:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784421575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:38,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:38,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:50:38,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177146812] [2024-06-21 18:50:38,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:50:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:50:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:50:38,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:50:38,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 325 transitions, 6093 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:38,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:38,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:50:38,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:40,800 INFO L124 PetriNetUnfolderBase]: 11555/16434 cut-off events. [2024-06-21 18:50:40,800 INFO L125 PetriNetUnfolderBase]: For 360132/360134 co-relation queries the response was YES. [2024-06-21 18:50:40,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103450 conditions, 16434 events. 11555/16434 cut-off events. For 360132/360134 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 93346 event pairs, 4255 based on Foata normal form. 4/16419 useless extension candidates. Maximal degree in co-relation 103369. Up to 15596 conditions per place. [2024-06-21 18:50:40,954 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 324 selfloop transitions, 16 changer transitions 0/347 dead transitions. [2024-06-21 18:50:40,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 347 transitions, 6867 flow [2024-06-21 18:50:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:50:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:50:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 18:50:40,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 18:50:40,956 INFO L175 Difference]: Start difference. First operand has 152 places, 325 transitions, 6093 flow. Second operand 6 states and 140 transitions. [2024-06-21 18:50:40,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 347 transitions, 6867 flow [2024-06-21 18:50:41,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 347 transitions, 6597 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:41,371 INFO L231 Difference]: Finished difference. Result has 154 places, 329 transitions, 5914 flow [2024-06-21 18:50:41,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5914, PETRI_PLACES=154, PETRI_TRANSITIONS=329} [2024-06-21 18:50:41,371 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-21 18:50:41,371 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 329 transitions, 5914 flow [2024-06-21 18:50:41,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:41,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:41,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:41,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:50:41,372 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:41,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1218184414, now seen corresponding path program 1 times [2024-06-21 18:50:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:41,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801021697] [2024-06-21 18:50:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:41,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801021697] [2024-06-21 18:50:42,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801021697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:42,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:42,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998273652] [2024-06-21 18:50:42,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:42,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:42,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:42,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 329 transitions, 5914 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:42,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:42,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:42,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:45,788 INFO L124 PetriNetUnfolderBase]: 12986/17904 cut-off events. [2024-06-21 18:50:45,793 INFO L125 PetriNetUnfolderBase]: For 430008/430043 co-relation queries the response was YES. [2024-06-21 18:50:45,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114444 conditions, 17904 events. 12986/17904 cut-off events. For 430008/430043 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 97030 event pairs, 4752 based on Foata normal form. 32/17920 useless extension candidates. Maximal degree in co-relation 114362. Up to 17175 conditions per place. [2024-06-21 18:50:45,974 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 290 selfloop transitions, 68 changer transitions 0/364 dead transitions. [2024-06-21 18:50:45,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 364 transitions, 6806 flow [2024-06-21 18:50:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:50:45,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43990384615384615 [2024-06-21 18:50:45,976 INFO L175 Difference]: Start difference. First operand has 154 places, 329 transitions, 5914 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:50:45,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 364 transitions, 6806 flow [2024-06-21 18:50:46,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 364 transitions, 6743 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:46,473 INFO L231 Difference]: Finished difference. Result has 157 places, 332 transitions, 6059 flow [2024-06-21 18:50:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5851, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6059, PETRI_PLACES=157, PETRI_TRANSITIONS=332} [2024-06-21 18:50:46,474 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2024-06-21 18:50:46,474 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 332 transitions, 6059 flow [2024-06-21 18:50:46,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:46,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:46,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:50:46,475 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:46,475 INFO L85 PathProgramCache]: Analyzing trace with hash 847371202, now seen corresponding path program 2 times [2024-06-21 18:50:46,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:46,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473098889] [2024-06-21 18:50:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473098889] [2024-06-21 18:50:47,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473098889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:47,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:47,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:50:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125377359] [2024-06-21 18:50:47,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:47,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:50:47,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:50:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:50:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:47,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 332 transitions, 6059 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:47,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:50,743 INFO L124 PetriNetUnfolderBase]: 13095/18069 cut-off events. [2024-06-21 18:50:50,743 INFO L125 PetriNetUnfolderBase]: For 469557/469612 co-relation queries the response was YES. [2024-06-21 18:50:50,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118334 conditions, 18069 events. 13095/18069 cut-off events. For 469557/469612 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 98204 event pairs, 4740 based on Foata normal form. 52/18105 useless extension candidates. Maximal degree in co-relation 118251. Up to 17208 conditions per place. [2024-06-21 18:50:51,041 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 299 selfloop transitions, 67 changer transitions 0/372 dead transitions. [2024-06-21 18:50:51,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 372 transitions, 6969 flow [2024-06-21 18:50:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 18:50:51,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 18:50:51,043 INFO L175 Difference]: Start difference. First operand has 157 places, 332 transitions, 6059 flow. Second operand 8 states and 184 transitions. [2024-06-21 18:50:51,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 372 transitions, 6969 flow [2024-06-21 18:50:51,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 372 transitions, 6789 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:51,588 INFO L231 Difference]: Finished difference. Result has 160 places, 339 transitions, 6126 flow [2024-06-21 18:50:51,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5879, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6126, PETRI_PLACES=160, PETRI_TRANSITIONS=339} [2024-06-21 18:50:51,588 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-21 18:50:51,589 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 339 transitions, 6126 flow [2024-06-21 18:50:51,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:51,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:51,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:51,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:50:51,589 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:51,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash 965704030, now seen corresponding path program 1 times [2024-06-21 18:50:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:51,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328458480] [2024-06-21 18:50:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:53,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328458480] [2024-06-21 18:50:53,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328458480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:53,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:53,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279197576] [2024-06-21 18:50:53,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:53,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:53,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:53,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:53,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 339 transitions, 6126 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:53,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:53,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:53,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:56,652 INFO L124 PetriNetUnfolderBase]: 13420/18552 cut-off events. [2024-06-21 18:50:56,653 INFO L125 PetriNetUnfolderBase]: For 535815/535835 co-relation queries the response was YES. [2024-06-21 18:50:56,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123865 conditions, 18552 events. 13420/18552 cut-off events. For 535815/535835 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 102245 event pairs, 4371 based on Foata normal form. 68/18589 useless extension candidates. Maximal degree in co-relation 123781. Up to 16125 conditions per place. [2024-06-21 18:50:56,826 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 179 selfloop transitions, 208 changer transitions 0/393 dead transitions. [2024-06-21 18:50:56,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 393 transitions, 7449 flow [2024-06-21 18:50:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 18:50:56,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47649572649572647 [2024-06-21 18:50:56,828 INFO L175 Difference]: Start difference. First operand has 160 places, 339 transitions, 6126 flow. Second operand 9 states and 223 transitions. [2024-06-21 18:50:56,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 393 transitions, 7449 flow [2024-06-21 18:50:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 393 transitions, 7278 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:57,403 INFO L231 Difference]: Finished difference. Result has 164 places, 343 transitions, 6465 flow [2024-06-21 18:50:57,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6465, PETRI_PLACES=164, PETRI_TRANSITIONS=343} [2024-06-21 18:50:57,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-21 18:50:57,404 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 343 transitions, 6465 flow [2024-06-21 18:50:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:57,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:57,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:57,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:50:57,405 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:57,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash 78429525, now seen corresponding path program 1 times [2024-06-21 18:50:57,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:57,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028792008] [2024-06-21 18:50:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:57,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028792008] [2024-06-21 18:50:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028792008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:58,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:50:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128615456] [2024-06-21 18:50:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:50:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:50:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:50:58,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:58,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 343 transitions, 6465 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:58,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:58,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:58,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:01,740 INFO L124 PetriNetUnfolderBase]: 13443/18593 cut-off events. [2024-06-21 18:51:01,740 INFO L125 PetriNetUnfolderBase]: For 567438/567457 co-relation queries the response was YES. [2024-06-21 18:51:01,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129359 conditions, 18593 events. 13443/18593 cut-off events. For 567438/567457 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 102332 event pairs, 4644 based on Foata normal form. 18/18604 useless extension candidates. Maximal degree in co-relation 129274. Up to 18098 conditions per place. [2024-06-21 18:51:01,918 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 334 selfloop transitions, 43 changer transitions 0/383 dead transitions. [2024-06-21 18:51:01,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 383 transitions, 7811 flow [2024-06-21 18:51:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 18:51:01,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 18:51:01,919 INFO L175 Difference]: Start difference. First operand has 164 places, 343 transitions, 6465 flow. Second operand 6 states and 146 transitions. [2024-06-21 18:51:01,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 383 transitions, 7811 flow [2024-06-21 18:51:02,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 383 transitions, 7374 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:02,658 INFO L231 Difference]: Finished difference. Result has 165 places, 355 transitions, 6432 flow [2024-06-21 18:51:02,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6043, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6432, PETRI_PLACES=165, PETRI_TRANSITIONS=355} [2024-06-21 18:51:02,658 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-21 18:51:02,659 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 355 transitions, 6432 flow [2024-06-21 18:51:02,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:02,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:02,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:02,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:51:02,659 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:51:02,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1532158326, now seen corresponding path program 2 times [2024-06-21 18:51:02,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:02,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017201135] [2024-06-21 18:51:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:02,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:04,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017201135] [2024-06-21 18:51:04,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017201135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:04,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:04,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717872624] [2024-06-21 18:51:04,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:04,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:04,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:04,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:51:04,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 355 transitions, 6432 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:04,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:04,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:51:04,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:07,879 INFO L124 PetriNetUnfolderBase]: 13514/18661 cut-off events. [2024-06-21 18:51:07,880 INFO L125 PetriNetUnfolderBase]: For 591241/591265 co-relation queries the response was YES. [2024-06-21 18:51:07,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128354 conditions, 18661 events. 13514/18661 cut-off events. For 591241/591265 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 102556 event pairs, 4655 based on Foata normal form. 32/18628 useless extension candidates. Maximal degree in co-relation 128266. Up to 16601 conditions per place. [2024-06-21 18:51:08,055 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 155 selfloop transitions, 246 changer transitions 0/407 dead transitions. [2024-06-21 18:51:08,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 407 transitions, 7727 flow [2024-06-21 18:51:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 18:51:08,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 18:51:08,057 INFO L175 Difference]: Start difference. First operand has 165 places, 355 transitions, 6432 flow. Second operand 9 states and 216 transitions. [2024-06-21 18:51:08,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 407 transitions, 7727 flow [2024-06-21 18:51:08,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 407 transitions, 7532 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:08,716 INFO L231 Difference]: Finished difference. Result has 172 places, 359 transitions, 6825 flow [2024-06-21 18:51:08,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6825, PETRI_PLACES=172, PETRI_TRANSITIONS=359} [2024-06-21 18:51:08,717 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-21 18:51:08,717 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 359 transitions, 6825 flow [2024-06-21 18:51:08,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:08,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:08,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:08,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:51:08,717 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:51:08,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1760059476, now seen corresponding path program 3 times [2024-06-21 18:51:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:08,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494486806] [2024-06-21 18:51:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:10,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494486806] [2024-06-21 18:51:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494486806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:10,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:10,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:10,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844435422] [2024-06-21 18:51:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:10,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:10,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:10,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:51:10,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 359 transitions, 6825 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:10,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:10,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:51:10,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:13,895 INFO L124 PetriNetUnfolderBase]: 13585/18760 cut-off events. [2024-06-21 18:51:13,895 INFO L125 PetriNetUnfolderBase]: For 652377/652389 co-relation queries the response was YES. [2024-06-21 18:51:13,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133738 conditions, 18760 events. 13585/18760 cut-off events. For 652377/652389 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 102970 event pairs, 4689 based on Foata normal form. 20/18715 useless extension candidates. Maximal degree in co-relation 133648. Up to 16689 conditions per place. [2024-06-21 18:51:14,080 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 177 selfloop transitions, 232 changer transitions 0/415 dead transitions. [2024-06-21 18:51:14,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 415 transitions, 8299 flow [2024-06-21 18:51:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 18:51:14,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636752136752137 [2024-06-21 18:51:14,081 INFO L175 Difference]: Start difference. First operand has 172 places, 359 transitions, 6825 flow. Second operand 9 states and 217 transitions. [2024-06-21 18:51:14,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 415 transitions, 8299 flow