./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix035_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix035_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:51:15,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:51:15,630 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:51:15,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:51:15,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:51:15,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:51:15,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:51:15,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:51:15,660 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:51:15,663 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:51:15,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:51:15,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:51:15,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:51:15,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:51:15,665 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:51:15,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:51:15,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:51:15,666 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:51:15,666 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:51:15,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:51:15,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:51:15,667 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:51:15,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:51:15,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:51:15,668 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:51:15,668 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:51:15,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:51:15,668 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:51:15,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:51:15,669 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:51:15,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:51:15,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:51:15,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:51:15,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:51:15,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:51:15,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:51:15,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:51:15,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:51:15,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:51:15,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:51:15,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:51:15,672 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:51:15,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:51:15,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:51:15,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:51:15,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:51:15,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:51:15,897 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:51:15,898 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:51:15,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix035_power.opt_rmo.opt.yml/witness.yml [2024-06-21 18:51:16,018 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:51:16,018 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:51:16,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-21 18:51:17,088 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:51:17,291 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:51:17,291 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-21 18:51:17,304 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15bdad686/02016e357a6e4d03a54d2c507dc1ebd9/FLAG72b75e393 [2024-06-21 18:51:17,315 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15bdad686/02016e357a6e4d03a54d2c507dc1ebd9 [2024-06-21 18:51:17,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:51:17,317 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:51:17,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:51:17,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:51:17,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:51:17,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:51:16" (1/2) ... [2024-06-21 18:51:17,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cdf275 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:51:17, skipping insertion in model container [2024-06-21 18:51:17,323 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:51:16" (1/2) ... [2024-06-21 18:51:17,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bdaca83 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:51:17, skipping insertion in model container [2024-06-21 18:51:17,324 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:51:17" (2/2) ... [2024-06-21 18:51:17,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cdf275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17, skipping insertion in model container [2024-06-21 18:51:17,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:51:17" (2/2) ... [2024-06-21 18:51:17,325 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:51:17,352 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:51:17,353 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:51:17,353 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:51:17,354 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:51:17,354 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:51:17,354 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-21 18:51:17,424 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:51:17,725 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:51:17,736 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:51:17,916 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:51:17,945 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:51:17,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17 WrapperNode [2024-06-21 18:51:17,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:51:17,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:51:17,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:51:17,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:51:17,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:17,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,018 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-21 18:51:18,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:51:18,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:51:18,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:51:18,020 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:51:18,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,063 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 18:51:18,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:51:18,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:51:18,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:51:18,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:51:18,107 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (1/1) ... [2024-06-21 18:51:18,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:51:18,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:51:18,144 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 18:51:18,147 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 18:51:18,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:51:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:51:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:51:18,185 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:51:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:51:18,185 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:51:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:51:18,186 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:51:18,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:51:18,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:51:18,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:51:18,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:51:18,187 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 18:51:18,314 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:51:18,316 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:51:18,699 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:51:18,700 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:51:18,818 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:51:18,818 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:51:18,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:51:18 BoogieIcfgContainer [2024-06-21 18:51:18,819 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:51:18,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:51:18,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:51:18,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:51:18,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:51:16" (1/4) ... [2024-06-21 18:51:18,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce0c42 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:51:18, skipping insertion in model container [2024-06-21 18:51:18,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:51:17" (2/4) ... [2024-06-21 18:51:18,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce0c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:51:18, skipping insertion in model container [2024-06-21 18:51:18,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:17" (3/4) ... [2024-06-21 18:51:18,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce0c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:51:18, skipping insertion in model container [2024-06-21 18:51:18,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:51:18" (4/4) ... [2024-06-21 18:51:18,825 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_power.opt_rmo.opt.i [2024-06-21 18:51:18,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:51:18,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:51:18,838 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:51:18,896 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:51:18,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 18:51:18,940 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 18:51:18,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:51:18,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:51:18,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 18:51:18,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 18:51:18,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:51:18,957 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;@7849de3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:51:18,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:51:18,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:51:18,960 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:51:18,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:51:18,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:18,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:51:18,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:18,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 371757946, now seen corresponding path program 1 times [2024-06-21 18:51:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:18,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126694263] [2024-06-21 18:51:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:18,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:20,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:20,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126694263] [2024-06-21 18:51:20,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126694263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:20,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:20,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:51:20,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717229061] [2024-06-21 18:51:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:51:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:51:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:51:20,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 18:51:20,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 18:51:20,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:20,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 18:51:20,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:20,678 INFO L124 PetriNetUnfolderBase]: 1116/1796 cut-off events. [2024-06-21 18:51:20,678 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 18:51:20,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1796 events. 1116/1796 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8974 event pairs, 765 based on Foata normal form. 1/1731 useless extension candidates. Maximal degree in co-relation 3535. Up to 1676 conditions per place. [2024-06-21 18:51:20,690 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 18:51:20,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-21 18:51:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:51:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:51:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-21 18:51:20,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 18:51:20,701 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-21 18:51:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-21 18:51:20,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:20,705 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 18:51:20,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 18:51:20,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 18:51:20,709 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 18:51:20,709 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 18:51:20,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:20,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:20,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:51:20,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:20,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash 777140057, now seen corresponding path program 1 times [2024-06-21 18:51:20,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:20,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318016085] [2024-06-21 18:51:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:20,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:21,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:21,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318016085] [2024-06-21 18:51:21,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318016085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:21,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:21,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:51:21,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967254280] [2024-06-21 18:51:21,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:21,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:51:21,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:51:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:51:21,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 18:51:21,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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 18:51:21,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:21,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 18:51:21,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:21,823 INFO L124 PetriNetUnfolderBase]: 1280/1997 cut-off events. [2024-06-21 18:51:21,824 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-21 18:51:21,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 1997 events. 1280/1997 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9769 event pairs, 750 based on Foata normal form. 3/1968 useless extension candidates. Maximal degree in co-relation 4506. Up to 1897 conditions per place. [2024-06-21 18:51:21,833 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 18:51:21,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-21 18:51:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:51:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:51:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 18:51:21,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 18:51:21,835 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-21 18:51:21,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-21 18:51:21,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:51:21,837 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 18:51:21,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 18:51:21,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 18:51:21,838 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 18:51:21,838 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 18:51:21,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:21,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:21,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:51:21,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:21,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1678460713, now seen corresponding path program 1 times [2024-06-21 18:51:21,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:21,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885216405] [2024-06-21 18:51:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:23,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:23,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885216405] [2024-06-21 18:51:23,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885216405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:23,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:23,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:51:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304136540] [2024-06-21 18:51:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:23,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:51:23,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:51:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:51:23,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 18:51:23,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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 18:51:23,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:23,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 18:51:23,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:23,727 INFO L124 PetriNetUnfolderBase]: 1274/1990 cut-off events. [2024-06-21 18:51:23,727 INFO L125 PetriNetUnfolderBase]: For 1079/1079 co-relation queries the response was YES. [2024-06-21 18:51:23,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5019 conditions, 1990 events. 1274/1990 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9748 event pairs, 608 based on Foata normal form. 3/1961 useless extension candidates. Maximal degree in co-relation 5005. Up to 1873 conditions per place. [2024-06-21 18:51:23,736 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 46 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-21 18:51:23,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 318 flow [2024-06-21 18:51:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:51:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:51:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 18:51:23,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-21 18:51:23,738 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 124 transitions. [2024-06-21 18:51:23,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 318 flow [2024-06-21 18:51:23,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 304 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:23,740 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-21 18:51:23,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-21 18:51:23,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-21 18:51:23,741 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-21 18:51:23,741 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 18:51:23,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:23,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:23,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:51:23,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:23,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1529686814, now seen corresponding path program 1 times [2024-06-21 18:51:23,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:23,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394114371] [2024-06-21 18:51:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:23,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:25,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:25,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394114371] [2024-06-21 18:51:25,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394114371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:25,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:25,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:25,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762251398] [2024-06-21 18:51:25,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:25,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:25,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:25,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:25,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 18:51:25,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 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 18:51:25,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:25,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 18:51:25,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:25,864 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-21 18:51:25,865 INFO L125 PetriNetUnfolderBase]: For 1998/1998 co-relation queries the response was YES. [2024-06-21 18:51:25,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5467 conditions, 1973 events. 1265/1973 cut-off events. For 1998/1998 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9639 event pairs, 445 based on Foata normal form. 6/1947 useless extension candidates. Maximal degree in co-relation 5452. Up to 1828 conditions per place. [2024-06-21 18:51:25,876 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 18:51:25,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 372 flow [2024-06-21 18:51:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 18:51:25,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-21 18:51:25,880 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 143 transitions. [2024-06-21 18:51:25,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 372 flow [2024-06-21 18:51:25,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 348 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:25,885 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-21 18:51:25,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-21 18:51:25,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 18:51:25,887 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-21 18:51:25,887 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 18:51:25,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:25,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:51:25,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:25,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1123708824, now seen corresponding path program 1 times [2024-06-21 18:51:25,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:25,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830025080] [2024-06-21 18:51:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:26,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:26,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830025080] [2024-06-21 18:51:26,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830025080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:26,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:26,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:51:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615344174] [2024-06-21 18:51:26,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:26,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:51:26,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:51:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:51:26,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:51:26,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 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 18:51:26,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:26,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:51:26,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:27,211 INFO L124 PetriNetUnfolderBase]: 1090/1819 cut-off events. [2024-06-21 18:51:27,212 INFO L125 PetriNetUnfolderBase]: For 2654/2654 co-relation queries the response was YES. [2024-06-21 18:51:27,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 1819 events. 1090/1819 cut-off events. For 2654/2654 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9415 event pairs, 460 based on Foata normal form. 2/1813 useless extension candidates. Maximal degree in co-relation 5189. Up to 1627 conditions per place. [2024-06-21 18:51:27,223 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 41 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2024-06-21 18:51:27,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 58 transitions, 347 flow [2024-06-21 18:51:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 18:51:27,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:51:27,225 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 6 states and 117 transitions. [2024-06-21 18:51:27,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 58 transitions, 347 flow [2024-06-21 18:51:27,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 312 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:27,231 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 223 flow [2024-06-21 18:51:27,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 18:51:27,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 18:51:27,234 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 223 flow [2024-06-21 18:51:27,235 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 18:51:27,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:27,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:51:27,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:27,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash -579647141, now seen corresponding path program 1 times [2024-06-21 18:51:27,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:27,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434089086] [2024-06-21 18:51:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:28,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:28,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434089086] [2024-06-21 18:51:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434089086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:28,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:28,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:28,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972868430] [2024-06-21 18:51:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:28,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:28,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:28,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:28,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 223 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 18:51:28,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:28,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:28,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:28,874 INFO L124 PetriNetUnfolderBase]: 1283/2025 cut-off events. [2024-06-21 18:51:28,874 INFO L125 PetriNetUnfolderBase]: For 4339/4339 co-relation queries the response was YES. [2024-06-21 18:51:28,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6372 conditions, 2025 events. 1283/2025 cut-off events. For 4339/4339 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10005 event pairs, 531 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 6352. Up to 1886 conditions per place. [2024-06-21 18:51:28,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 48 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2024-06-21 18:51:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 437 flow [2024-06-21 18:51:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 18:51:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 18:51:28,885 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 223 flow. Second operand 6 states and 122 transitions. [2024-06-21 18:51:28,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 437 flow [2024-06-21 18:51:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 413 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:28,889 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 297 flow [2024-06-21 18:51:28,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-21 18:51:28,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 18:51:28,889 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 297 flow [2024-06-21 18:51:28,890 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 18:51:28,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:28,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:51:28,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:28,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash -571453841, now seen corresponding path program 2 times [2024-06-21 18:51:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:28,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879429974] [2024-06-21 18:51:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:28,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:29,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:29,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879429974] [2024-06-21 18:51:29,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879429974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:29,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:29,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362117066] [2024-06-21 18:51:29,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:29,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:30,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:30,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 297 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 18:51:30,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:30,440 INFO L124 PetriNetUnfolderBase]: 1294/2053 cut-off events. [2024-06-21 18:51:30,440 INFO L125 PetriNetUnfolderBase]: For 5964/5968 co-relation queries the response was YES. [2024-06-21 18:51:30,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6972 conditions, 2053 events. 1294/2053 cut-off events. For 5964/5968 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10189 event pairs, 527 based on Foata normal form. 6/2048 useless extension candidates. Maximal degree in co-relation 6950. Up to 1873 conditions per place. [2024-06-21 18:51:30,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 47 selfloop transitions, 25 changer transitions 0/78 dead transitions. [2024-06-21 18:51:30,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 557 flow [2024-06-21 18:51:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 18:51:30,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-21 18:51:30,453 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 297 flow. Second operand 6 states and 124 transitions. [2024-06-21 18:51:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 557 flow [2024-06-21 18:51:30,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 529 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 18:51:30,456 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 385 flow [2024-06-21 18:51:30,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 18:51:30,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 18:51:30,457 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 385 flow [2024-06-21 18:51:30,457 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 18:51:30,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:30,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:30,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:51:30,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:30,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash -300188475, now seen corresponding path program 3 times [2024-06-21 18:51:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:30,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724816186] [2024-06-21 18:51:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724816186] [2024-06-21 18:51:31,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724816186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:31,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:31,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:31,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226275673] [2024-06-21 18:51:31,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:31,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:31,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:31,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:31,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 385 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 18:51:31,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:31,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:31,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:31,862 INFO L124 PetriNetUnfolderBase]: 1303/2068 cut-off events. [2024-06-21 18:51:31,862 INFO L125 PetriNetUnfolderBase]: For 7973/7973 co-relation queries the response was YES. [2024-06-21 18:51:31,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7513 conditions, 2068 events. 1303/2068 cut-off events. For 7973/7973 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10214 event pairs, 521 based on Foata normal form. 2/2061 useless extension candidates. Maximal degree in co-relation 7488. Up to 1908 conditions per place. [2024-06-21 18:51:31,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 59 selfloop transitions, 24 changer transitions 0/89 dead transitions. [2024-06-21 18:51:31,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 650 flow [2024-06-21 18:51:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 18:51:31,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:51:31,883 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 385 flow. Second operand 7 states and 140 transitions. [2024-06-21 18:51:31,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 650 flow [2024-06-21 18:51:31,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 601 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:31,889 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 457 flow [2024-06-21 18:51:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=457, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 18:51:31,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 18:51:31,891 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 457 flow [2024-06-21 18:51:31,891 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 18:51:31,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:31,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:51:31,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:31,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2096774213, now seen corresponding path program 1 times [2024-06-21 18:51:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:31,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351073188] [2024-06-21 18:51:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:33,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351073188] [2024-06-21 18:51:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351073188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184099941] [2024-06-21 18:51:33,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:33,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:33,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:33,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 457 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 18:51:33,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:33,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:33,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:33,979 INFO L124 PetriNetUnfolderBase]: 1390/2257 cut-off events. [2024-06-21 18:51:33,980 INFO L125 PetriNetUnfolderBase]: For 9434/9434 co-relation queries the response was YES. [2024-06-21 18:51:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8230 conditions, 2257 events. 1390/2257 cut-off events. For 9434/9434 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11517 event pairs, 547 based on Foata normal form. 2/2247 useless extension candidates. Maximal degree in co-relation 8202. Up to 2046 conditions per place. [2024-06-21 18:51:33,990 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-21 18:51:33,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 724 flow [2024-06-21 18:51:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 18:51:33,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 18:51:33,992 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 457 flow. Second operand 7 states and 137 transitions. [2024-06-21 18:51:33,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 724 flow [2024-06-21 18:51:34,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 661 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:34,002 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 485 flow [2024-06-21 18:51:34,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=485, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-21 18:51:34,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 18:51:34,003 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 485 flow [2024-06-21 18:51:34,003 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 18:51:34,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:34,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:34,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:51:34,004 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:34,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1258058385, now seen corresponding path program 1 times [2024-06-21 18:51:34,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:34,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408586907] [2024-06-21 18:51:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408586907] [2024-06-21 18:51:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408586907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:35,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:35,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476296274] [2024-06-21 18:51:35,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:35,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:35,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:35,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:35,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 485 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 18:51:35,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:35,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:35,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:36,175 INFO L124 PetriNetUnfolderBase]: 1571/2460 cut-off events. [2024-06-21 18:51:36,175 INFO L125 PetriNetUnfolderBase]: For 13634/13649 co-relation queries the response was YES. [2024-06-21 18:51:36,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9933 conditions, 2460 events. 1571/2460 cut-off events. For 13634/13649 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12350 event pairs, 562 based on Foata normal form. 2/2441 useless extension candidates. Maximal degree in co-relation 9904. Up to 2270 conditions per place. [2024-06-21 18:51:36,188 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-21 18:51:36,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 787 flow [2024-06-21 18:51:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 18:51:36,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 18:51:36,189 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 485 flow. Second operand 7 states and 143 transitions. [2024-06-21 18:51:36,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 787 flow [2024-06-21 18:51:36,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 743 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:36,197 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 568 flow [2024-06-21 18:51:36,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-21 18:51:36,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 18:51:36,198 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 568 flow [2024-06-21 18:51:36,198 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 18:51:36,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:36,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:36,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:51:36,199 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:36,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1258178355, now seen corresponding path program 2 times [2024-06-21 18:51:36,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:36,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263949833] [2024-06-21 18:51:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:36,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263949833] [2024-06-21 18:51:37,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263949833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:37,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739577903] [2024-06-21 18:51:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:37,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:37,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 568 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 18:51:37,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:37,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:37,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:38,393 INFO L124 PetriNetUnfolderBase]: 1575/2488 cut-off events. [2024-06-21 18:51:38,394 INFO L125 PetriNetUnfolderBase]: For 16605/16620 co-relation queries the response was YES. [2024-06-21 18:51:38,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10659 conditions, 2488 events. 1575/2488 cut-off events. For 16605/16620 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12624 event pairs, 544 based on Foata normal form. 12/2485 useless extension candidates. Maximal degree in co-relation 10628. Up to 2253 conditions per place. [2024-06-21 18:51:38,408 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 33 changer transitions 0/105 dead transitions. [2024-06-21 18:51:38,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 858 flow [2024-06-21 18:51:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:51:38,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:51:38,410 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 568 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:51:38,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 858 flow [2024-06-21 18:51:38,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 805 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:38,418 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 632 flow [2024-06-21 18:51:38,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=632, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-21 18:51:38,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-21 18:51:38,419 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 632 flow [2024-06-21 18:51:38,419 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 18:51:38,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:38,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:38,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:51:38,420 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:38,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:38,420 INFO L85 PathProgramCache]: Analyzing trace with hash -784549651, now seen corresponding path program 3 times [2024-06-21 18:51:38,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:38,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021296337] [2024-06-21 18:51:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:38,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:40,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021296337] [2024-06-21 18:51:40,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021296337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:40,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:40,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:40,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542695502] [2024-06-21 18:51:40,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:40,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:40,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:40,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:40,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:40,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 632 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 18:51:40,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:40,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:40,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:40,857 INFO L124 PetriNetUnfolderBase]: 1583/2502 cut-off events. [2024-06-21 18:51:40,857 INFO L125 PetriNetUnfolderBase]: For 20960/20985 co-relation queries the response was YES. [2024-06-21 18:51:40,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11350 conditions, 2502 events. 1583/2502 cut-off events. For 20960/20985 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12717 event pairs, 532 based on Foata normal form. 9/2495 useless extension candidates. Maximal degree in co-relation 11317. Up to 2194 conditions per place. [2024-06-21 18:51:40,898 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 59 selfloop transitions, 46 changer transitions 0/112 dead transitions. [2024-06-21 18:51:40,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 1028 flow [2024-06-21 18:51:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:51:40,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:51:40,900 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 632 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:51:40,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 1028 flow [2024-06-21 18:51:40,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 112 transitions, 945 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:40,912 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 739 flow [2024-06-21 18:51:40,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=739, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-21 18:51:40,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 18:51:40,913 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 739 flow [2024-06-21 18:51:40,914 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 18:51:40,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:40,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:40,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:51:40,914 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:40,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1249317493, now seen corresponding path program 4 times [2024-06-21 18:51:40,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424367359] [2024-06-21 18:51:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:41,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:41,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424367359] [2024-06-21 18:51:41,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424367359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:41,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:41,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:41,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074068981] [2024-06-21 18:51:41,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:41,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:41,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:42,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:42,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 739 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 18:51:42,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:42,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:42,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:42,574 INFO L124 PetriNetUnfolderBase]: 1627/2581 cut-off events. [2024-06-21 18:51:42,574 INFO L125 PetriNetUnfolderBase]: For 25287/25312 co-relation queries the response was YES. [2024-06-21 18:51:42,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12314 conditions, 2581 events. 1627/2581 cut-off events. For 25287/25312 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13168 event pairs, 521 based on Foata normal form. 7/2573 useless extension candidates. Maximal degree in co-relation 12280. Up to 2318 conditions per place. [2024-06-21 18:51:42,587 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 77 selfloop transitions, 44 changer transitions 0/128 dead transitions. [2024-06-21 18:51:42,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 1180 flow [2024-06-21 18:51:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 18:51:42,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 18:51:42,589 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 739 flow. Second operand 7 states and 143 transitions. [2024-06-21 18:51:42,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 1180 flow [2024-06-21 18:51:42,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 1109 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:42,605 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 953 flow [2024-06-21 18:51:42,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=953, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-06-21 18:51:42,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 18:51:42,606 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 953 flow [2024-06-21 18:51:42,606 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 18:51:42,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:42,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:42,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:51:42,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:42,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1055556333, now seen corresponding path program 5 times [2024-06-21 18:51:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:42,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286603691] [2024-06-21 18:51:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:43,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286603691] [2024-06-21 18:51:43,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286603691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:43,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:43,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34496338] [2024-06-21 18:51:43,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:44,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:44,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 953 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 18:51:44,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:44,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:44,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:44,690 INFO L124 PetriNetUnfolderBase]: 1650/2628 cut-off events. [2024-06-21 18:51:44,690 INFO L125 PetriNetUnfolderBase]: For 28396/28425 co-relation queries the response was YES. [2024-06-21 18:51:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12912 conditions, 2628 events. 1650/2628 cut-off events. For 28396/28425 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13502 event pairs, 521 based on Foata normal form. 11/2625 useless extension candidates. Maximal degree in co-relation 12875. Up to 2366 conditions per place. [2024-06-21 18:51:44,706 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 92 selfloop transitions, 46 changer transitions 0/145 dead transitions. [2024-06-21 18:51:44,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 145 transitions, 1456 flow [2024-06-21 18:51:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:51:44,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 18:51:44,708 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 953 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:51:44,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 145 transitions, 1456 flow [2024-06-21 18:51:44,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 1358 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:44,728 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 1144 flow [2024-06-21 18:51:44,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2024-06-21 18:51:44,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 18:51:44,729 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 1144 flow [2024-06-21 18:51:44,729 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 18:51:44,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:44,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:51:44,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:44,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash 575492317, now seen corresponding path program 1 times [2024-06-21 18:51:44,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:44,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548342702] [2024-06-21 18:51:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:46,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:46,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548342702] [2024-06-21 18:51:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548342702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:46,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:46,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:46,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127253393] [2024-06-21 18:51:46,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:46,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:46,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:46,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:46,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:46,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 1144 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:46,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:46,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:46,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:47,390 INFO L124 PetriNetUnfolderBase]: 1561/2530 cut-off events. [2024-06-21 18:51:47,391 INFO L125 PetriNetUnfolderBase]: For 26657/26657 co-relation queries the response was YES. [2024-06-21 18:51:47,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11975 conditions, 2530 events. 1561/2530 cut-off events. For 26657/26657 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12948 event pairs, 553 based on Foata normal form. 4/2518 useless extension candidates. Maximal degree in co-relation 11936. Up to 2276 conditions per place. [2024-06-21 18:51:47,405 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2024-06-21 18:51:47,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 146 transitions, 1524 flow [2024-06-21 18:51:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 18:51:47,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 18:51:47,408 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 1144 flow. Second operand 9 states and 166 transitions. [2024-06-21 18:51:47,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 146 transitions, 1524 flow [2024-06-21 18:51:47,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 146 transitions, 1404 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:47,426 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 1103 flow [2024-06-21 18:51:47,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2024-06-21 18:51:47,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 18:51:47,427 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 1103 flow [2024-06-21 18:51:47,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:47,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:47,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:51:47,428 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:47,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash 850076573, now seen corresponding path program 1 times [2024-06-21 18:51:47,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:47,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205564420] [2024-06-21 18:51:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:48,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:48,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205564420] [2024-06-21 18:51:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205564420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:51:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020188380] [2024-06-21 18:51:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:51:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:51:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:51:48,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:51:48,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 1103 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:48,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:48,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:51:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:48,971 INFO L124 PetriNetUnfolderBase]: 1558/2526 cut-off events. [2024-06-21 18:51:48,971 INFO L125 PetriNetUnfolderBase]: For 28353/28353 co-relation queries the response was YES. [2024-06-21 18:51:48,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2526 events. 1558/2526 cut-off events. For 28353/28353 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12898 event pairs, 567 based on Foata normal form. 1/2511 useless extension candidates. Maximal degree in co-relation 12064. Up to 2314 conditions per place. [2024-06-21 18:51:48,984 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 117 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2024-06-21 18:51:48,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 1399 flow [2024-06-21 18:51:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:51:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:51:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-21 18:51:48,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 18:51:48,986 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 1103 flow. Second operand 5 states and 97 transitions. [2024-06-21 18:51:48,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 1399 flow [2024-06-21 18:51:49,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1338 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:49,005 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1098 flow [2024-06-21 18:51:49,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1098, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-06-21 18:51:49,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 18:51:49,005 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1098 flow [2024-06-21 18:51:49,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:49,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:49,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:49,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:51:49,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:49,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash 160899622, now seen corresponding path program 1 times [2024-06-21 18:51:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:49,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147977475] [2024-06-21 18:51:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:49,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147977475] [2024-06-21 18:51:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147977475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:50,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:50,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:50,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894157698] [2024-06-21 18:51:50,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:51:50,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1098 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:50,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:50,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:51:50,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:51,042 INFO L124 PetriNetUnfolderBase]: 1776/2772 cut-off events. [2024-06-21 18:51:51,042 INFO L125 PetriNetUnfolderBase]: For 36003/36009 co-relation queries the response was YES. [2024-06-21 18:51:51,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13907 conditions, 2772 events. 1776/2772 cut-off events. For 36003/36009 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13666 event pairs, 577 based on Foata normal form. 8/2777 useless extension candidates. Maximal degree in co-relation 13865. Up to 2568 conditions per place. [2024-06-21 18:51:51,058 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 31 changer transitions 0/156 dead transitions. [2024-06-21 18:51:51,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 156 transitions, 1544 flow [2024-06-21 18:51:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:51:51,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 18:51:51,059 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1098 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:51:51,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 156 transitions, 1544 flow [2024-06-21 18:51:51,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 156 transitions, 1518 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:51,079 INFO L231 Difference]: Finished difference. Result has 103 places, 134 transitions, 1236 flow [2024-06-21 18:51:51,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1236, PETRI_PLACES=103, PETRI_TRANSITIONS=134} [2024-06-21 18:51:51,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 18:51:51,080 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 134 transitions, 1236 flow [2024-06-21 18:51:51,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:51,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:51,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:51,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:51:51,080 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:51,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1552558614, now seen corresponding path program 2 times [2024-06-21 18:51:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:51,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074297358] [2024-06-21 18:51:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:51,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:52,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:52,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074297358] [2024-06-21 18:51:52,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074297358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:52,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:52,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:52,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087036149] [2024-06-21 18:51:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:52,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:52,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:52,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:51:52,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 134 transitions, 1236 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:52,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:52,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:51:52,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:53,447 INFO L124 PetriNetUnfolderBase]: 1787/2794 cut-off events. [2024-06-21 18:51:53,447 INFO L125 PetriNetUnfolderBase]: For 40913/40921 co-relation queries the response was YES. [2024-06-21 18:51:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14767 conditions, 2794 events. 1787/2794 cut-off events. For 40913/40921 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13912 event pairs, 576 based on Foata normal form. 10/2801 useless extension candidates. Maximal degree in co-relation 14722. Up to 2491 conditions per place. [2024-06-21 18:51:53,463 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 54 changer transitions 0/169 dead transitions. [2024-06-21 18:51:53,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 169 transitions, 1824 flow [2024-06-21 18:51:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 18:51:53,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 18:51:53,465 INFO L175 Difference]: Start difference. First operand has 103 places, 134 transitions, 1236 flow. Second operand 9 states and 165 transitions. [2024-06-21 18:51:53,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 169 transitions, 1824 flow [2024-06-21 18:51:53,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 169 transitions, 1735 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:53,488 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1411 flow [2024-06-21 18:51:53,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-21 18:51:53,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 18:51:53,488 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1411 flow [2024-06-21 18:51:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:53,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:53,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:51:53,489 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:53,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1552291704, now seen corresponding path program 3 times [2024-06-21 18:51:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:53,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756194827] [2024-06-21 18:51:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:53,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:55,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:55,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756194827] [2024-06-21 18:51:55,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756194827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:55,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:55,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:55,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299624497] [2024-06-21 18:51:55,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:55,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:55,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:55,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:55,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:51:55,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1411 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:55,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:55,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:51:55,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:55,778 INFO L124 PetriNetUnfolderBase]: 1809/2826 cut-off events. [2024-06-21 18:51:55,779 INFO L125 PetriNetUnfolderBase]: For 46111/46119 co-relation queries the response was YES. [2024-06-21 18:51:55,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15709 conditions, 2826 events. 1809/2826 cut-off events. For 46111/46119 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14040 event pairs, 576 based on Foata normal form. 10/2833 useless extension candidates. Maximal degree in co-relation 15662. Up to 2556 conditions per place. [2024-06-21 18:51:55,792 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 49 changer transitions 0/173 dead transitions. [2024-06-21 18:51:55,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 173 transitions, 1888 flow [2024-06-21 18:51:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:51:55,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:51:55,801 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1411 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:51:55,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 173 transitions, 1888 flow [2024-06-21 18:51:55,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 173 transitions, 1815 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:55,827 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1525 flow [2024-06-21 18:51:55,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1525, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-06-21 18:51:55,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 18:51:55,828 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1525 flow [2024-06-21 18:51:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:55,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:55,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:51:55,828 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:55,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1544940054, now seen corresponding path program 4 times [2024-06-21 18:51:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302731415] [2024-06-21 18:51:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:57,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302731415] [2024-06-21 18:51:57,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302731415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:57,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:57,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269870453] [2024-06-21 18:51:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:57,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:57,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:57,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:51:57,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1525 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:57,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:57,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:51:57,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:58,254 INFO L124 PetriNetUnfolderBase]: 1820/2842 cut-off events. [2024-06-21 18:51:58,255 INFO L125 PetriNetUnfolderBase]: For 49428/49436 co-relation queries the response was YES. [2024-06-21 18:51:58,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15871 conditions, 2842 events. 1820/2842 cut-off events. For 49428/49436 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14095 event pairs, 576 based on Foata normal form. 10/2849 useless extension candidates. Maximal degree in co-relation 15822. Up to 2572 conditions per place. [2024-06-21 18:51:58,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 48 changer transitions 0/177 dead transitions. [2024-06-21 18:51:58,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1996 flow [2024-06-21 18:51:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 18:51:58,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 18:51:58,275 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1525 flow. Second operand 9 states and 163 transitions. [2024-06-21 18:51:58,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1996 flow [2024-06-21 18:51:58,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 177 transitions, 1870 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:58,311 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1580 flow [2024-06-21 18:51:58,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1580, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-21 18:51:58,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 18:51:58,317 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1580 flow [2024-06-21 18:51:58,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:58,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:58,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:58,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:51:58,318 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:58,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash -967631338, now seen corresponding path program 5 times [2024-06-21 18:51:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:58,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051269121] [2024-06-21 18:51:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051269121] [2024-06-21 18:51:59,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051269121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:59,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:59,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078685667] [2024-06-21 18:51:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:59,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:59,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:59,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:51:59,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1580 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:59,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:59,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:51:59,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:00,405 INFO L124 PetriNetUnfolderBase]: 1822/2827 cut-off events. [2024-06-21 18:52:00,405 INFO L125 PetriNetUnfolderBase]: For 52914/52920 co-relation queries the response was YES. [2024-06-21 18:52:00,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16023 conditions, 2827 events. 1822/2827 cut-off events. For 52914/52920 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13877 event pairs, 579 based on Foata normal form. 8/2833 useless extension candidates. Maximal degree in co-relation 15972. Up to 2633 conditions per place. [2024-06-21 18:52:00,424 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 146 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2024-06-21 18:52:00,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 2054 flow [2024-06-21 18:52:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:52:00,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:52:00,425 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1580 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:52:00,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 2054 flow [2024-06-21 18:52:00,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 187 transitions, 1900 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:00,466 INFO L231 Difference]: Finished difference. Result has 122 places, 159 transitions, 1552 flow [2024-06-21 18:52:00,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1552, PETRI_PLACES=122, PETRI_TRANSITIONS=159} [2024-06-21 18:52:00,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 18:52:00,467 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 159 transitions, 1552 flow [2024-06-21 18:52:00,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:00,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:00,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:52:00,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:00,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 612958655, now seen corresponding path program 1 times [2024-06-21 18:52:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:00,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339895556] [2024-06-21 18:52:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:01,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339895556] [2024-06-21 18:52:01,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339895556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:01,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:01,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:52:01,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527935168] [2024-06-21 18:52:01,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:52:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:52:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:52:01,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:01,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 159 transitions, 1552 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:01,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:01,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:01,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:02,217 INFO L124 PetriNetUnfolderBase]: 1819/2836 cut-off events. [2024-06-21 18:52:02,218 INFO L125 PetriNetUnfolderBase]: For 56777/56777 co-relation queries the response was YES. [2024-06-21 18:52:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16128 conditions, 2836 events. 1819/2836 cut-off events. For 56777/56777 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 14009 event pairs, 618 based on Foata normal form. 1/2835 useless extension candidates. Maximal degree in co-relation 16075. Up to 2687 conditions per place. [2024-06-21 18:52:02,237 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 152 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2024-06-21 18:52:02,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1930 flow [2024-06-21 18:52:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:52:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:52:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 18:52:02,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-21 18:52:02,238 INFO L175 Difference]: Start difference. First operand has 122 places, 159 transitions, 1552 flow. Second operand 6 states and 107 transitions. [2024-06-21 18:52:02,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1930 flow [2024-06-21 18:52:02,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 170 transitions, 1794 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 18:52:02,272 INFO L231 Difference]: Finished difference. Result has 118 places, 162 transitions, 1482 flow [2024-06-21 18:52:02,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1482, PETRI_PLACES=118, PETRI_TRANSITIONS=162} [2024-06-21 18:52:02,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 18:52:02,272 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 162 transitions, 1482 flow [2024-06-21 18:52:02,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:02,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:02,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:02,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:52:02,274 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:02,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1791951716, now seen corresponding path program 1 times [2024-06-21 18:52:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:02,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222493675] [2024-06-21 18:52:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:02,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:03,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222493675] [2024-06-21 18:52:03,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222493675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:03,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:03,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927815461] [2024-06-21 18:52:03,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:03,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:03,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:03,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:52:03,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 162 transitions, 1482 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 18:52:03,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:03,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:52:03,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:04,691 INFO L124 PetriNetUnfolderBase]: 1752/2775 cut-off events. [2024-06-21 18:52:04,691 INFO L125 PetriNetUnfolderBase]: For 70142/70148 co-relation queries the response was YES. [2024-06-21 18:52:04,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2775 events. 1752/2775 cut-off events. For 70142/70148 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14348 event pairs, 512 based on Foata normal form. 4/2770 useless extension candidates. Maximal degree in co-relation 16969. Up to 2454 conditions per place. [2024-06-21 18:52:04,713 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 129 selfloop transitions, 46 changer transitions 0/187 dead transitions. [2024-06-21 18:52:04,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 187 transitions, 1944 flow [2024-06-21 18:52:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:52:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 18:52:04,715 INFO L175 Difference]: Start difference. First operand has 118 places, 162 transitions, 1482 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:52:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 187 transitions, 1944 flow [2024-06-21 18:52:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 187 transitions, 1906 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:52:04,757 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1593 flow [2024-06-21 18:52:04,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1593, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-21 18:52:04,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 18:52:04,759 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1593 flow [2024-06-21 18:52:04,759 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 18:52:04,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:04,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:04,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:52:04,760 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:04,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2105470864, now seen corresponding path program 2 times [2024-06-21 18:52:04,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445216227] [2024-06-21 18:52:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:06,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:06,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445216227] [2024-06-21 18:52:06,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445216227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:06,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:06,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:06,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476837974] [2024-06-21 18:52:06,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:06,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:06,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:06,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:52:06,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1593 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 18:52:06,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:06,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:52:06,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:07,036 INFO L124 PetriNetUnfolderBase]: 1812/2870 cut-off events. [2024-06-21 18:52:07,036 INFO L125 PetriNetUnfolderBase]: For 78727/78733 co-relation queries the response was YES. [2024-06-21 18:52:07,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18208 conditions, 2870 events. 1812/2870 cut-off events. For 78727/78733 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14997 event pairs, 514 based on Foata normal form. 4/2864 useless extension candidates. Maximal degree in co-relation 18154. Up to 2542 conditions per place. [2024-06-21 18:52:07,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 142 selfloop transitions, 39 changer transitions 0/193 dead transitions. [2024-06-21 18:52:07,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 193 transitions, 2085 flow [2024-06-21 18:52:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:52:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:52:07,062 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1593 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:52:07,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 193 transitions, 2085 flow [2024-06-21 18:52:07,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 193 transitions, 1958 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:07,113 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1620 flow [2024-06-21 18:52:07,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1620, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2024-06-21 18:52:07,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 18:52:07,114 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1620 flow [2024-06-21 18:52:07,114 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 18:52:07,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:07,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:07,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:52:07,115 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:07,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1796420366, now seen corresponding path program 3 times [2024-06-21 18:52:07,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:07,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515472912] [2024-06-21 18:52:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:07,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:08,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:08,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515472912] [2024-06-21 18:52:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515472912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:08,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:08,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870320403] [2024-06-21 18:52:08,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:08,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:08,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:52:08,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1620 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 18:52:08,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:08,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:52:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:09,655 INFO L124 PetriNetUnfolderBase]: 1815/2883 cut-off events. [2024-06-21 18:52:09,655 INFO L125 PetriNetUnfolderBase]: For 86893/86899 co-relation queries the response was YES. [2024-06-21 18:52:09,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18654 conditions, 2883 events. 1815/2883 cut-off events. For 86893/86899 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15042 event pairs, 523 based on Foata normal form. 4/2878 useless extension candidates. Maximal degree in co-relation 18598. Up to 2530 conditions per place. [2024-06-21 18:52:09,676 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 60 changer transitions 0/193 dead transitions. [2024-06-21 18:52:09,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2102 flow [2024-06-21 18:52:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:52:09,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:52:09,678 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1620 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:52:09,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2102 flow [2024-06-21 18:52:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 1979 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:09,727 INFO L231 Difference]: Finished difference. Result has 129 places, 170 transitions, 1681 flow [2024-06-21 18:52:09,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1681, PETRI_PLACES=129, PETRI_TRANSITIONS=170} [2024-06-21 18:52:09,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 18:52:09,728 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 170 transitions, 1681 flow [2024-06-21 18:52:09,728 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 18:52:09,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:09,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:09,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:52:09,729 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:09,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 577451232, now seen corresponding path program 1 times [2024-06-21 18:52:09,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:09,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072468831] [2024-06-21 18:52:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:11,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072468831] [2024-06-21 18:52:11,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072468831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:11,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:11,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:11,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928710510] [2024-06-21 18:52:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:11,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:11,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:11,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:11,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 170 transitions, 1681 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:11,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:11,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:11,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:12,432 INFO L124 PetriNetUnfolderBase]: 2013/3107 cut-off events. [2024-06-21 18:52:12,432 INFO L125 PetriNetUnfolderBase]: For 92518/92518 co-relation queries the response was YES. [2024-06-21 18:52:12,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19649 conditions, 3107 events. 2013/3107 cut-off events. For 92518/92518 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15455 event pairs, 526 based on Foata normal form. 2/3105 useless extension candidates. Maximal degree in co-relation 19593. Up to 2850 conditions per place. [2024-06-21 18:52:12,454 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 146 selfloop transitions, 54 changer transitions 0/206 dead transitions. [2024-06-21 18:52:12,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 206 transitions, 2285 flow [2024-06-21 18:52:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 18:52:12,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 18:52:12,456 INFO L175 Difference]: Start difference. First operand has 129 places, 170 transitions, 1681 flow. Second operand 10 states and 181 transitions. [2024-06-21 18:52:12,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 206 transitions, 2285 flow [2024-06-21 18:52:12,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 206 transitions, 2109 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:12,517 INFO L231 Difference]: Finished difference. Result has 133 places, 180 transitions, 1767 flow [2024-06-21 18:52:12,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1767, PETRI_PLACES=133, PETRI_TRANSITIONS=180} [2024-06-21 18:52:12,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 18:52:12,518 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 180 transitions, 1767 flow [2024-06-21 18:52:12,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:12,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:12,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:12,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:52:12,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:12,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash 692742402, now seen corresponding path program 2 times [2024-06-21 18:52:12,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:12,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933984597] [2024-06-21 18:52:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:12,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:14,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:14,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933984597] [2024-06-21 18:52:14,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933984597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:14,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:14,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455134409] [2024-06-21 18:52:14,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:14,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:14,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 180 transitions, 1767 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:14,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:14,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:14,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:15,494 INFO L124 PetriNetUnfolderBase]: 2042/3156 cut-off events. [2024-06-21 18:52:15,495 INFO L125 PetriNetUnfolderBase]: For 98551/98551 co-relation queries the response was YES. [2024-06-21 18:52:15,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20380 conditions, 3156 events. 2042/3156 cut-off events. For 98551/98551 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15826 event pairs, 518 based on Foata normal form. 2/3154 useless extension candidates. Maximal degree in co-relation 20322. Up to 2825 conditions per place. [2024-06-21 18:52:15,518 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 136 selfloop transitions, 74 changer transitions 0/216 dead transitions. [2024-06-21 18:52:15,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 216 transitions, 2377 flow [2024-06-21 18:52:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:52:15,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 18:52:15,520 INFO L175 Difference]: Start difference. First operand has 133 places, 180 transitions, 1767 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:52:15,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 216 transitions, 2377 flow [2024-06-21 18:52:15,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 216 transitions, 2227 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:15,579 INFO L231 Difference]: Finished difference. Result has 137 places, 190 transitions, 1905 flow [2024-06-21 18:52:15,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1905, PETRI_PLACES=137, PETRI_TRANSITIONS=190} [2024-06-21 18:52:15,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 18:52:15,580 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 190 transitions, 1905 flow [2024-06-21 18:52:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:15,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:15,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:15,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:52:15,581 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:15,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2071170362, now seen corresponding path program 3 times [2024-06-21 18:52:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:15,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671160061] [2024-06-21 18:52:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671160061] [2024-06-21 18:52:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671160061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:17,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:17,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:17,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065348132] [2024-06-21 18:52:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:17,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:17,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:17,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:17,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 190 transitions, 1905 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:17,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:17,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:17,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:18,323 INFO L124 PetriNetUnfolderBase]: 2053/3177 cut-off events. [2024-06-21 18:52:18,323 INFO L125 PetriNetUnfolderBase]: For 107342/107342 co-relation queries the response was YES. [2024-06-21 18:52:18,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21256 conditions, 3177 events. 2053/3177 cut-off events. For 107342/107342 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15993 event pairs, 518 based on Foata normal form. 2/3175 useless extension candidates. Maximal degree in co-relation 21196. Up to 2841 conditions per place. [2024-06-21 18:52:18,347 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 138 selfloop transitions, 79 changer transitions 0/223 dead transitions. [2024-06-21 18:52:18,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 223 transitions, 2527 flow [2024-06-21 18:52:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 18:52:18,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 18:52:18,349 INFO L175 Difference]: Start difference. First operand has 137 places, 190 transitions, 1905 flow. Second operand 10 states and 183 transitions. [2024-06-21 18:52:18,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 223 transitions, 2527 flow [2024-06-21 18:52:18,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 223 transitions, 2320 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:18,415 INFO L231 Difference]: Finished difference. Result has 140 places, 197 transitions, 1981 flow [2024-06-21 18:52:18,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1981, PETRI_PLACES=140, PETRI_TRANSITIONS=197} [2024-06-21 18:52:18,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 18:52:18,416 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 197 transitions, 1981 flow [2024-06-21 18:52:18,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:18,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:18,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:18,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:52:18,416 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:18,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:18,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2071163604, now seen corresponding path program 1 times [2024-06-21 18:52:18,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:18,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118108376] [2024-06-21 18:52:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:18,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:19,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118108376] [2024-06-21 18:52:19,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118108376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:19,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200044100] [2024-06-21 18:52:19,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:20,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:20,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 197 transitions, 1981 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:20,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:20,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:20,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:20,975 INFO L124 PetriNetUnfolderBase]: 2070/3211 cut-off events. [2024-06-21 18:52:20,975 INFO L125 PetriNetUnfolderBase]: For 116935/116941 co-relation queries the response was YES. [2024-06-21 18:52:20,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21919 conditions, 3211 events. 2070/3211 cut-off events. For 116935/116941 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 16312 event pairs, 474 based on Foata normal form. 10/3218 useless extension candidates. Maximal degree in co-relation 21858. Up to 2965 conditions per place. [2024-06-21 18:52:20,997 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 37 changer transitions 0/226 dead transitions. [2024-06-21 18:52:20,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 2555 flow [2024-06-21 18:52:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 18:52:20,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 18:52:20,998 INFO L175 Difference]: Start difference. First operand has 140 places, 197 transitions, 1981 flow. Second operand 10 states and 178 transitions. [2024-06-21 18:52:20,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 2555 flow [2024-06-21 18:52:21,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 226 transitions, 2371 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:21,061 INFO L231 Difference]: Finished difference. Result has 144 places, 199 transitions, 1937 flow [2024-06-21 18:52:21,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1937, PETRI_PLACES=144, PETRI_TRANSITIONS=199} [2024-06-21 18:52:21,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 18:52:21,062 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 199 transitions, 1937 flow [2024-06-21 18:52:21,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:21,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:21,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:21,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:52:21,063 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:21,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:21,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2071163852, now seen corresponding path program 4 times [2024-06-21 18:52:21,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:21,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536212385] [2024-06-21 18:52:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:21,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:23,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:23,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536212385] [2024-06-21 18:52:23,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536212385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:23,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:23,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909308343] [2024-06-21 18:52:23,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:23,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 199 transitions, 1937 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:23,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:23,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:23,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:24,028 INFO L124 PetriNetUnfolderBase]: 2081/3225 cut-off events. [2024-06-21 18:52:24,029 INFO L125 PetriNetUnfolderBase]: For 123552/123552 co-relation queries the response was YES. [2024-06-21 18:52:24,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22286 conditions, 3225 events. 2081/3225 cut-off events. For 123552/123552 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16312 event pairs, 470 based on Foata normal form. 2/3223 useless extension candidates. Maximal degree in co-relation 22224. Up to 2831 conditions per place. [2024-06-21 18:52:24,051 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 130 selfloop transitions, 92 changer transitions 0/228 dead transitions. [2024-06-21 18:52:24,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 228 transitions, 2533 flow [2024-06-21 18:52:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:52:24,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 18:52:24,053 INFO L175 Difference]: Start difference. First operand has 144 places, 199 transitions, 1937 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:52:24,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 228 transitions, 2533 flow [2024-06-21 18:52:24,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 228 transitions, 2406 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 18:52:24,122 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2083 flow [2024-06-21 18:52:24,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2083, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-21 18:52:24,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 18:52:24,123 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2083 flow [2024-06-21 18:52:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:24,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:24,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:52:24,124 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1480914942, now seen corresponding path program 1 times [2024-06-21 18:52:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:24,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795744456] [2024-06-21 18:52:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:25,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:25,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795744456] [2024-06-21 18:52:25,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795744456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:25,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:25,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:52:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692445060] [2024-06-21 18:52:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:25,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:52:25,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:25,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:52:25,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:52:25,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:25,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2083 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:25,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:25,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:25,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:26,173 INFO L124 PetriNetUnfolderBase]: 2135/3291 cut-off events. [2024-06-21 18:52:26,174 INFO L125 PetriNetUnfolderBase]: For 132964/132964 co-relation queries the response was YES. [2024-06-21 18:52:26,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23356 conditions, 3291 events. 2135/3291 cut-off events. For 132964/132964 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16543 event pairs, 477 based on Foata normal form. 2/3289 useless extension candidates. Maximal degree in co-relation 23293. Up to 3027 conditions per place. [2024-06-21 18:52:26,199 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 40 changer transitions 0/227 dead transitions. [2024-06-21 18:52:26,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 227 transitions, 2831 flow [2024-06-21 18:52:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:52:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:52:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 18:52:26,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-21 18:52:26,200 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2083 flow. Second operand 6 states and 121 transitions. [2024-06-21 18:52:26,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 227 transitions, 2831 flow [2024-06-21 18:52:26,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 227 transitions, 2584 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:26,290 INFO L231 Difference]: Finished difference. Result has 143 places, 211 transitions, 2042 flow [2024-06-21 18:52:26,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2042, PETRI_PLACES=143, PETRI_TRANSITIONS=211} [2024-06-21 18:52:26,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 18:52:26,290 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 211 transitions, 2042 flow [2024-06-21 18:52:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:26,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:26,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:26,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:52:26,291 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:26,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash 648317874, now seen corresponding path program 4 times [2024-06-21 18:52:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:26,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627494631] [2024-06-21 18:52:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627494631] [2024-06-21 18:52:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627494631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:27,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:27,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:27,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310604396] [2024-06-21 18:52:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:27,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:27,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:52:27,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 211 transitions, 2042 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 18:52:27,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:27,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:52:27,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:28,829 INFO L124 PetriNetUnfolderBase]: 1983/3148 cut-off events. [2024-06-21 18:52:28,829 INFO L125 PetriNetUnfolderBase]: For 142997/142997 co-relation queries the response was YES. [2024-06-21 18:52:28,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23156 conditions, 3148 events. 1983/3148 cut-off events. For 142997/142997 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16561 event pairs, 500 based on Foata normal form. 8/3144 useless extension candidates. Maximal degree in co-relation 23091. Up to 2642 conditions per place. [2024-06-21 18:52:28,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 99 changer transitions 0/236 dead transitions. [2024-06-21 18:52:28,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 236 transitions, 2620 flow [2024-06-21 18:52:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:52:28,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 18:52:28,854 INFO L175 Difference]: Start difference. First operand has 143 places, 211 transitions, 2042 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:52:28,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 236 transitions, 2620 flow [2024-06-21 18:52:28,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 236 transitions, 2597 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 18:52:28,927 INFO L231 Difference]: Finished difference. Result has 151 places, 213 transitions, 2294 flow [2024-06-21 18:52:28,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2294, PETRI_PLACES=151, PETRI_TRANSITIONS=213} [2024-06-21 18:52:28,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 18:52:28,927 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 213 transitions, 2294 flow [2024-06-21 18:52:28,928 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 18:52:28,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:28,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:52:28,928 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:28,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 884677932, now seen corresponding path program 2 times [2024-06-21 18:52:28,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:28,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016064830] [2024-06-21 18:52:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:30,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:30,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016064830] [2024-06-21 18:52:30,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016064830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:30,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:30,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:30,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96542866] [2024-06-21 18:52:30,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:30,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:31,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 213 transitions, 2294 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:32,005 INFO L124 PetriNetUnfolderBase]: 2224/3434 cut-off events. [2024-06-21 18:52:32,005 INFO L125 PetriNetUnfolderBase]: For 156692/156692 co-relation queries the response was YES. [2024-06-21 18:52:32,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25516 conditions, 3434 events. 2224/3434 cut-off events. For 156692/156692 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17324 event pairs, 544 based on Foata normal form. 4/3433 useless extension candidates. Maximal degree in co-relation 25448. Up to 2913 conditions per place. [2024-06-21 18:52:32,038 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 130 selfloop transitions, 125 changer transitions 0/261 dead transitions. [2024-06-21 18:52:32,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 261 transitions, 3297 flow [2024-06-21 18:52:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:52:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:52:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 18:52:32,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 18:52:32,040 INFO L175 Difference]: Start difference. First operand has 151 places, 213 transitions, 2294 flow. Second operand 11 states and 204 transitions. [2024-06-21 18:52:32,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 261 transitions, 3297 flow [2024-06-21 18:52:32,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 261 transitions, 3022 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:32,154 INFO L231 Difference]: Finished difference. Result has 158 places, 228 transitions, 2678 flow [2024-06-21 18:52:32,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2678, PETRI_PLACES=158, PETRI_TRANSITIONS=228} [2024-06-21 18:52:32,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 18:52:32,155 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 228 transitions, 2678 flow [2024-06-21 18:52:32,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:32,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:32,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:52:32,156 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:32,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash 648502572, now seen corresponding path program 3 times [2024-06-21 18:52:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:32,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631485749] [2024-06-21 18:52:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:33,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631485749] [2024-06-21 18:52:33,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631485749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:33,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:33,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:33,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920497326] [2024-06-21 18:52:33,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:33,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:33,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:33,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 228 transitions, 2678 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:33,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:33,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:33,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:34,702 INFO L124 PetriNetUnfolderBase]: 2241/3464 cut-off events. [2024-06-21 18:52:34,702 INFO L125 PetriNetUnfolderBase]: For 167400/167408 co-relation queries the response was YES. [2024-06-21 18:52:34,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26744 conditions, 3464 events. 2241/3464 cut-off events. For 167400/167408 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17562 event pairs, 549 based on Foata normal form. 12/3472 useless extension candidates. Maximal degree in co-relation 26672. Up to 3153 conditions per place. [2024-06-21 18:52:34,734 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 201 selfloop transitions, 50 changer transitions 0/257 dead transitions. [2024-06-21 18:52:34,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 257 transitions, 3326 flow [2024-06-21 18:52:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:52:34,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 18:52:34,736 INFO L175 Difference]: Start difference. First operand has 158 places, 228 transitions, 2678 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:52:34,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 257 transitions, 3326 flow [2024-06-21 18:52:34,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 257 transitions, 3196 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:34,871 INFO L231 Difference]: Finished difference. Result has 162 places, 230 transitions, 2725 flow [2024-06-21 18:52:34,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2725, PETRI_PLACES=162, PETRI_TRANSITIONS=230} [2024-06-21 18:52:34,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 18:52:34,872 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 230 transitions, 2725 flow [2024-06-21 18:52:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:34,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:34,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:34,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:52:34,872 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:34,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:34,873 INFO L85 PathProgramCache]: Analyzing trace with hash 876403474, now seen corresponding path program 5 times [2024-06-21 18:52:34,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:34,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543221757] [2024-06-21 18:52:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:34,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543221757] [2024-06-21 18:52:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543221757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848696116] [2024-06-21 18:52:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:36,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:36,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:36,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:36,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 230 transitions, 2725 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:36,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:36,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:36,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:37,841 INFO L124 PetriNetUnfolderBase]: 2279/3526 cut-off events. [2024-06-21 18:52:37,842 INFO L125 PetriNetUnfolderBase]: For 175883/175883 co-relation queries the response was YES. [2024-06-21 18:52:37,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27378 conditions, 3526 events. 2279/3526 cut-off events. For 175883/175883 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17924 event pairs, 549 based on Foata normal form. 2/3523 useless extension candidates. Maximal degree in co-relation 27304. Up to 2985 conditions per place. [2024-06-21 18:52:37,869 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 139 selfloop transitions, 127 changer transitions 0/272 dead transitions. [2024-06-21 18:52:37,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 272 transitions, 3718 flow [2024-06-21 18:52:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 18:52:37,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 18:52:37,871 INFO L175 Difference]: Start difference. First operand has 162 places, 230 transitions, 2725 flow. Second operand 9 states and 177 transitions. [2024-06-21 18:52:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 272 transitions, 3718 flow [2024-06-21 18:52:37,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 272 transitions, 3559 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:37,998 INFO L231 Difference]: Finished difference. Result has 165 places, 244 transitions, 3129 flow [2024-06-21 18:52:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3129, PETRI_PLACES=165, PETRI_TRANSITIONS=244} [2024-06-21 18:52:37,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 18:52:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 244 transitions, 3129 flow [2024-06-21 18:52:37,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:37,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:37,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:52:37,999 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash 884677684, now seen corresponding path program 6 times [2024-06-21 18:52:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:37,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207715860] [2024-06-21 18:52:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:39,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207715860] [2024-06-21 18:52:39,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207715860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:39,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:39,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:39,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392222458] [2024-06-21 18:52:39,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:39,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:39,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:39,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:39,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:39,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:39,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 244 transitions, 3129 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:39,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:39,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:40,601 INFO L124 PetriNetUnfolderBase]: 2306/3575 cut-off events. [2024-06-21 18:52:40,602 INFO L125 PetriNetUnfolderBase]: For 189972/189972 co-relation queries the response was YES. [2024-06-21 18:52:40,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28857 conditions, 3575 events. 2306/3575 cut-off events. For 189972/189972 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18306 event pairs, 549 based on Foata normal form. 2/3572 useless extension candidates. Maximal degree in co-relation 28781. Up to 3011 conditions per place. [2024-06-21 18:52:40,633 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 143 selfloop transitions, 129 changer transitions 0/278 dead transitions. [2024-06-21 18:52:40,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 278 transitions, 4085 flow [2024-06-21 18:52:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 18:52:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 18:52:40,635 INFO L175 Difference]: Start difference. First operand has 165 places, 244 transitions, 3129 flow. Second operand 9 states and 177 transitions. [2024-06-21 18:52:40,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 278 transitions, 4085 flow [2024-06-21 18:52:40,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 278 transitions, 3949 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-21 18:52:40,844 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 3461 flow [2024-06-21 18:52:40,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3461, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-21 18:52:40,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 18:52:40,845 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 3461 flow [2024-06-21 18:52:40,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:40,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:40,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:40,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:52:40,845 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:40,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 876396964, now seen corresponding path program 7 times [2024-06-21 18:52:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068650919] [2024-06-21 18:52:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:42,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068650919] [2024-06-21 18:52:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068650919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:42,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:42,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082555840] [2024-06-21 18:52:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:42,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:42,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 3461 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:42,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:42,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:42,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:43,857 INFO L124 PetriNetUnfolderBase]: 2301/3568 cut-off events. [2024-06-21 18:52:43,857 INFO L125 PetriNetUnfolderBase]: For 198938/198938 co-relation queries the response was YES. [2024-06-21 18:52:43,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29408 conditions, 3568 events. 2301/3568 cut-off events. For 198938/198938 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18247 event pairs, 506 based on Foata normal form. 2/3565 useless extension candidates. Maximal degree in co-relation 29330. Up to 3037 conditions per place. [2024-06-21 18:52:43,891 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 148 selfloop transitions, 122 changer transitions 0/276 dead transitions. [2024-06-21 18:52:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 276 transitions, 4079 flow [2024-06-21 18:52:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 18:52:43,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 18:52:43,893 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 3461 flow. Second operand 10 states and 183 transitions. [2024-06-21 18:52:43,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 276 transitions, 4079 flow [2024-06-21 18:52:44,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 276 transitions, 3787 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:44,075 INFO L231 Difference]: Finished difference. Result has 177 places, 250 transitions, 3421 flow [2024-06-21 18:52:44,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3421, PETRI_PLACES=177, PETRI_TRANSITIONS=250} [2024-06-21 18:52:44,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 18:52:44,076 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 250 transitions, 3421 flow [2024-06-21 18:52:44,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:44,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:44,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:44,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:52:44,077 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:44,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 884686302, now seen corresponding path program 4 times [2024-06-21 18:52:44,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:44,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92033725] [2024-06-21 18:52:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92033725] [2024-06-21 18:52:46,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92033725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:46,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:46,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760393250] [2024-06-21 18:52:46,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:46,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:46,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 250 transitions, 3421 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:46,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:46,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:46,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:47,312 INFO L124 PetriNetUnfolderBase]: 2450/3807 cut-off events. [2024-06-21 18:52:47,313 INFO L125 PetriNetUnfolderBase]: For 227041/227041 co-relation queries the response was YES. [2024-06-21 18:52:47,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32159 conditions, 3807 events. 2450/3807 cut-off events. For 227041/227041 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19824 event pairs, 451 based on Foata normal form. 4/3806 useless extension candidates. Maximal degree in co-relation 32079. Up to 2964 conditions per place. [2024-06-21 18:52:47,345 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 150 selfloop transitions, 136 changer transitions 0/292 dead transitions. [2024-06-21 18:52:47,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 292 transitions, 4591 flow [2024-06-21 18:52:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 18:52:47,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 18:52:47,347 INFO L175 Difference]: Start difference. First operand has 177 places, 250 transitions, 3421 flow. Second operand 10 states and 194 transitions. [2024-06-21 18:52:47,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 292 transitions, 4591 flow [2024-06-21 18:52:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 292 transitions, 4335 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:52:47,499 INFO L231 Difference]: Finished difference. Result has 179 places, 257 transitions, 3662 flow [2024-06-21 18:52:47,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3662, PETRI_PLACES=179, PETRI_TRANSITIONS=257} [2024-06-21 18:52:47,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 18:52:47,500 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 257 transitions, 3662 flow [2024-06-21 18:52:47,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:47,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:47,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:52:47,501 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:47,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash 648495814, now seen corresponding path program 8 times [2024-06-21 18:52:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:47,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855566012] [2024-06-21 18:52:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:49,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:49,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855566012] [2024-06-21 18:52:49,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855566012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:49,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:49,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:49,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382404937] [2024-06-21 18:52:49,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:49,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:49,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:49,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:49,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 257 transitions, 3662 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:49,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:49,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:49,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:50,688 INFO L124 PetriNetUnfolderBase]: 2468/3830 cut-off events. [2024-06-21 18:52:50,688 INFO L125 PetriNetUnfolderBase]: For 238655/238655 co-relation queries the response was YES. [2024-06-21 18:52:50,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33227 conditions, 3830 events. 2468/3830 cut-off events. For 238655/238655 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19969 event pairs, 577 based on Foata normal form. 2/3827 useless extension candidates. Maximal degree in co-relation 33145. Up to 3300 conditions per place. [2024-06-21 18:52:50,822 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 165 selfloop transitions, 119 changer transitions 0/290 dead transitions. [2024-06-21 18:52:50,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 290 transitions, 4442 flow [2024-06-21 18:52:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 18:52:50,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 18:52:50,826 INFO L175 Difference]: Start difference. First operand has 179 places, 257 transitions, 3662 flow. Second operand 10 states and 185 transitions. [2024-06-21 18:52:50,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 290 transitions, 4442 flow [2024-06-21 18:52:51,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 290 transitions, 4212 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:51,073 INFO L231 Difference]: Finished difference. Result has 184 places, 264 transitions, 3832 flow [2024-06-21 18:52:51,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3832, PETRI_PLACES=184, PETRI_TRANSITIONS=264} [2024-06-21 18:52:51,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 18:52:51,074 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 264 transitions, 3832 flow [2024-06-21 18:52:51,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:51,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:51,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:51,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:52:51,074 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:51,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1239109786, now seen corresponding path program 9 times [2024-06-21 18:52:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:51,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421696831] [2024-06-21 18:52:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421696831] [2024-06-21 18:52:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421696831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:52,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:52,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:52,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396047815] [2024-06-21 18:52:52,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:52,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:53,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:53,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 264 transitions, 3832 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:53,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:53,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:53,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:54,032 INFO L124 PetriNetUnfolderBase]: 2495/3879 cut-off events. [2024-06-21 18:52:54,032 INFO L125 PetriNetUnfolderBase]: For 252183/252183 co-relation queries the response was YES. [2024-06-21 18:52:54,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34415 conditions, 3879 events. 2495/3879 cut-off events. For 252183/252183 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20355 event pairs, 577 based on Foata normal form. 2/3876 useless extension candidates. Maximal degree in co-relation 34330. Up to 3310 conditions per place. [2024-06-21 18:52:54,069 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 165 selfloop transitions, 127 changer transitions 0/298 dead transitions. [2024-06-21 18:52:54,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 298 transitions, 4852 flow [2024-06-21 18:52:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:52:54,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 18:52:54,071 INFO L175 Difference]: Start difference. First operand has 184 places, 264 transitions, 3832 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:52:54,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 298 transitions, 4852 flow [2024-06-21 18:52:54,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 298 transitions, 4544 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:54,344 INFO L231 Difference]: Finished difference. Result has 189 places, 270 transitions, 4014 flow [2024-06-21 18:52:54,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4014, PETRI_PLACES=189, PETRI_TRANSITIONS=270} [2024-06-21 18:52:54,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 18:52:54,344 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 270 transitions, 4014 flow [2024-06-21 18:52:54,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:54,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:54,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:54,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:52:54,345 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:54,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1962064460, now seen corresponding path program 10 times [2024-06-21 18:52:54,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:54,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313281590] [2024-06-21 18:52:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:54,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313281590] [2024-06-21 18:52:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313281590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:56,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:56,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:56,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830023730] [2024-06-21 18:52:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:56,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:56,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:56,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:56,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 270 transitions, 4014 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:56,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:56,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:56,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:57,588 INFO L124 PetriNetUnfolderBase]: 2490/3872 cut-off events. [2024-06-21 18:52:57,588 INFO L125 PetriNetUnfolderBase]: For 263552/263552 co-relation queries the response was YES. [2024-06-21 18:52:57,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34795 conditions, 3872 events. 2490/3872 cut-off events. For 263552/263552 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20306 event pairs, 539 based on Foata normal form. 2/3869 useless extension candidates. Maximal degree in co-relation 34708. Up to 3332 conditions per place. [2024-06-21 18:52:57,627 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 170 selfloop transitions, 120 changer transitions 0/296 dead transitions. [2024-06-21 18:52:57,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 296 transitions, 4672 flow [2024-06-21 18:52:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:52:57,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 18:52:57,629 INFO L175 Difference]: Start difference. First operand has 189 places, 270 transitions, 4014 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:52:57,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 296 transitions, 4672 flow [2024-06-21 18:52:57,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 296 transitions, 4268 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:57,896 INFO L231 Difference]: Finished difference. Result has 192 places, 270 transitions, 3858 flow [2024-06-21 18:52:57,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3858, PETRI_PLACES=192, PETRI_TRANSITIONS=270} [2024-06-21 18:52:57,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 18:52:57,896 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 270 transitions, 3858 flow [2024-06-21 18:52:57,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:57,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:57,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:57,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:52:57,897 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:57,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash 879845692, now seen corresponding path program 2 times [2024-06-21 18:52:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:57,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998988863] [2024-06-21 18:52:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:57,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:59,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998988863] [2024-06-21 18:52:59,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998988863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:59,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:52:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855641786] [2024-06-21 18:52:59,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:59,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:52:59,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:52:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:52:59,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:52:59,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 270 transitions, 3858 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:59,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:59,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:52:59,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:59,990 INFO L124 PetriNetUnfolderBase]: 2484/3864 cut-off events. [2024-06-21 18:52:59,990 INFO L125 PetriNetUnfolderBase]: For 270410/270410 co-relation queries the response was YES. [2024-06-21 18:53:00,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34661 conditions, 3864 events. 2484/3864 cut-off events. For 270410/270410 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20253 event pairs, 538 based on Foata normal form. 2/3861 useless extension candidates. Maximal degree in co-relation 34573. Up to 3571 conditions per place. [2024-06-21 18:53:00,031 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 44 changer transitions 0/281 dead transitions. [2024-06-21 18:53:00,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 281 transitions, 4554 flow [2024-06-21 18:53:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:53:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:53:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 18:53:00,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 18:53:00,033 INFO L175 Difference]: Start difference. First operand has 192 places, 270 transitions, 3858 flow. Second operand 6 states and 115 transitions. [2024-06-21 18:53:00,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 281 transitions, 4554 flow [2024-06-21 18:53:00,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 281 transitions, 4256 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:00,331 INFO L231 Difference]: Finished difference. Result has 190 places, 270 transitions, 3656 flow [2024-06-21 18:53:00,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3656, PETRI_PLACES=190, PETRI_TRANSITIONS=270} [2024-06-21 18:53:00,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 18:53:00,336 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 270 transitions, 3656 flow [2024-06-21 18:53:00,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:00,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:00,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:00,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:53:00,337 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:00,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1747293342, now seen corresponding path program 5 times [2024-06-21 18:53:00,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:00,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953182498] [2024-06-21 18:53:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:00,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:01,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953182498] [2024-06-21 18:53:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953182498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:01,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917581179] [2024-06-21 18:53:01,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:01,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:01,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:53:01,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 270 transitions, 3656 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 18:53:01,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:01,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:53:01,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:02,661 INFO L124 PetriNetUnfolderBase]: 2383/3804 cut-off events. [2024-06-21 18:53:02,662 INFO L125 PetriNetUnfolderBase]: For 284043/284052 co-relation queries the response was YES. [2024-06-21 18:53:02,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34655 conditions, 3804 events. 2383/3804 cut-off events. For 284043/284052 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21043 event pairs, 523 based on Foata normal form. 13/3799 useless extension candidates. Maximal degree in co-relation 34565. Up to 3360 conditions per place. [2024-06-21 18:53:02,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 46 changer transitions 0/311 dead transitions. [2024-06-21 18:53:02,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 311 transitions, 4462 flow [2024-06-21 18:53:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:53:02,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 18:53:02,701 INFO L175 Difference]: Start difference. First operand has 190 places, 270 transitions, 3656 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:53:02,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 311 transitions, 4462 flow [2024-06-21 18:53:02,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 311 transitions, 4391 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:53:02,949 INFO L231 Difference]: Finished difference. Result has 197 places, 278 transitions, 3830 flow [2024-06-21 18:53:02,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3830, PETRI_PLACES=197, PETRI_TRANSITIONS=278} [2024-06-21 18:53:02,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 18:53:02,950 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 278 transitions, 3830 flow [2024-06-21 18:53:02,951 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 18:53:02,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:02,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:02,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:53:02,951 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:02,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1652732912, now seen corresponding path program 6 times [2024-06-21 18:53:02,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:02,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630573388] [2024-06-21 18:53:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:02,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:04,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630573388] [2024-06-21 18:53:04,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630573388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:04,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153320478] [2024-06-21 18:53:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:04,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:53:04,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 278 transitions, 3830 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 18:53:04,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:04,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:53:04,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:05,399 INFO L124 PetriNetUnfolderBase]: 2453/3927 cut-off events. [2024-06-21 18:53:05,400 INFO L125 PetriNetUnfolderBase]: For 306578/306580 co-relation queries the response was YES. [2024-06-21 18:53:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36306 conditions, 3927 events. 2453/3927 cut-off events. For 306578/306580 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21978 event pairs, 543 based on Foata normal form. 10/3926 useless extension candidates. Maximal degree in co-relation 36213. Up to 3460 conditions per place. [2024-06-21 18:53:05,441 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 239 selfloop transitions, 61 changer transitions 0/317 dead transitions. [2024-06-21 18:53:05,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 317 transitions, 4718 flow [2024-06-21 18:53:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:53:05,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 18:53:05,443 INFO L175 Difference]: Start difference. First operand has 197 places, 278 transitions, 3830 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:53:05,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 317 transitions, 4718 flow [2024-06-21 18:53:05,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 317 transitions, 4510 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:05,796 INFO L231 Difference]: Finished difference. Result has 197 places, 286 transitions, 3974 flow [2024-06-21 18:53:05,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3974, PETRI_PLACES=197, PETRI_TRANSITIONS=286} [2024-06-21 18:53:05,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 18:53:05,797 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 286 transitions, 3974 flow [2024-06-21 18:53:05,797 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 18:53:05,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:05,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:53:05,798 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:05,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 977221982, now seen corresponding path program 7 times [2024-06-21 18:53:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:05,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009996148] [2024-06-21 18:53:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:06,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009996148] [2024-06-21 18:53:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009996148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:06,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:53:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863849724] [2024-06-21 18:53:06,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:06,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:53:06,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:53:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:53:07,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 18:53:07,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 286 transitions, 3974 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:07,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:07,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 18:53:07,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:07,794 INFO L124 PetriNetUnfolderBase]: 2049/3542 cut-off events. [2024-06-21 18:53:07,794 INFO L125 PetriNetUnfolderBase]: For 264917/264952 co-relation queries the response was YES. [2024-06-21 18:53:07,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30554 conditions, 3542 events. 2049/3542 cut-off events. For 264917/264952 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21525 event pairs, 304 based on Foata normal form. 42/3563 useless extension candidates. Maximal degree in co-relation 30462. Up to 2377 conditions per place. [2024-06-21 18:53:07,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 93 changer transitions 0/321 dead transitions. [2024-06-21 18:53:07,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 321 transitions, 4735 flow [2024-06-21 18:53:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:53:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:53:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 18:53:07,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-21 18:53:07,838 INFO L175 Difference]: Start difference. First operand has 197 places, 286 transitions, 3974 flow. Second operand 7 states and 158 transitions. [2024-06-21 18:53:07,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 321 transitions, 4735 flow [2024-06-21 18:53:08,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 321 transitions, 4489 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:08,112 INFO L231 Difference]: Finished difference. Result has 199 places, 300 transitions, 4249 flow [2024-06-21 18:53:08,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4249, PETRI_PLACES=199, PETRI_TRANSITIONS=300} [2024-06-21 18:53:08,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 18:53:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 300 transitions, 4249 flow [2024-06-21 18:53:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:08,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:08,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:53:08,114 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:08,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1394276922, now seen corresponding path program 11 times [2024-06-21 18:53:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464050048] [2024-06-21 18:53:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:08,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464050048] [2024-06-21 18:53:09,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464050048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:09,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:09,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882964893] [2024-06-21 18:53:09,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:09,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:09,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:09,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:09,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 300 transitions, 4249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:09,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:09,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:09,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:10,826 INFO L124 PetriNetUnfolderBase]: 2735/4263 cut-off events. [2024-06-21 18:53:10,826 INFO L125 PetriNetUnfolderBase]: For 309208/309208 co-relation queries the response was YES. [2024-06-21 18:53:10,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37533 conditions, 4263 events. 2735/4263 cut-off events. For 309208/309208 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23116 event pairs, 628 based on Foata normal form. 2/4263 useless extension candidates. Maximal degree in co-relation 37439. Up to 3905 conditions per place. [2024-06-21 18:53:10,870 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 251 selfloop transitions, 79 changer transitions 0/336 dead transitions. [2024-06-21 18:53:10,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 336 transitions, 5157 flow [2024-06-21 18:53:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:53:10,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:53:10,872 INFO L175 Difference]: Start difference. First operand has 199 places, 300 transitions, 4249 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:53:10,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 336 transitions, 5157 flow [2024-06-21 18:53:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 336 transitions, 4971 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-21 18:53:11,232 INFO L231 Difference]: Finished difference. Result has 206 places, 308 transitions, 4431 flow [2024-06-21 18:53:11,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4431, PETRI_PLACES=206, PETRI_TRANSITIONS=308} [2024-06-21 18:53:11,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 18:53:11,233 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 308 transitions, 4431 flow [2024-06-21 18:53:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:53:11,233 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -800658958, now seen corresponding path program 12 times [2024-06-21 18:53:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982682034] [2024-06-21 18:53:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:13,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:13,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982682034] [2024-06-21 18:53:13,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982682034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:13,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:13,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531935126] [2024-06-21 18:53:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:13,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:13,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 308 transitions, 4431 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:13,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:13,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:13,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:14,195 INFO L124 PetriNetUnfolderBase]: 2744/4278 cut-off events. [2024-06-21 18:53:14,195 INFO L125 PetriNetUnfolderBase]: For 289863/289865 co-relation queries the response was YES. [2024-06-21 18:53:14,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36831 conditions, 4278 events. 2744/4278 cut-off events. For 289863/289865 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23165 event pairs, 616 based on Foata normal form. 4/4280 useless extension candidates. Maximal degree in co-relation 36735. Up to 3958 conditions per place. [2024-06-21 18:53:14,241 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 278 selfloop transitions, 64 changer transitions 0/348 dead transitions. [2024-06-21 18:53:14,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 348 transitions, 5395 flow [2024-06-21 18:53:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 18:53:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 18:53:14,243 INFO L175 Difference]: Start difference. First operand has 206 places, 308 transitions, 4431 flow. Second operand 10 states and 188 transitions. [2024-06-21 18:53:14,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 348 transitions, 5395 flow [2024-06-21 18:53:14,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 348 transitions, 5125 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:14,553 INFO L231 Difference]: Finished difference. Result has 212 places, 316 transitions, 4507 flow [2024-06-21 18:53:14,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4507, PETRI_PLACES=212, PETRI_TRANSITIONS=316} [2024-06-21 18:53:14,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 18:53:14,554 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 316 transitions, 4507 flow [2024-06-21 18:53:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:14,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:14,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:14,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:53:14,555 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:14,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1145009322, now seen corresponding path program 13 times [2024-06-21 18:53:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751324895] [2024-06-21 18:53:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:14,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:16,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:16,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751324895] [2024-06-21 18:53:16,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751324895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:16,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:16,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:16,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566067813] [2024-06-21 18:53:16,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:16,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:16,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:16,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:16,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 316 transitions, 4507 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:16,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:16,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:16,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:17,815 INFO L124 PetriNetUnfolderBase]: 2773/4317 cut-off events. [2024-06-21 18:53:17,815 INFO L125 PetriNetUnfolderBase]: For 300224/300224 co-relation queries the response was YES. [2024-06-21 18:53:17,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37322 conditions, 4317 events. 2773/4317 cut-off events. For 300224/300224 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23468 event pairs, 622 based on Foata normal form. 2/4317 useless extension candidates. Maximal degree in co-relation 37224. Up to 3907 conditions per place. [2024-06-21 18:53:17,859 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 253 selfloop transitions, 99 changer transitions 0/358 dead transitions. [2024-06-21 18:53:17,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 358 transitions, 5513 flow [2024-06-21 18:53:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 18:53:17,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 18:53:17,862 INFO L175 Difference]: Start difference. First operand has 212 places, 316 transitions, 4507 flow. Second operand 10 states and 189 transitions. [2024-06-21 18:53:17,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 358 transitions, 5513 flow [2024-06-21 18:53:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 358 transitions, 5249 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 18:53:18,185 INFO L231 Difference]: Finished difference. Result has 213 places, 326 transitions, 4693 flow [2024-06-21 18:53:18,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4693, PETRI_PLACES=213, PETRI_TRANSITIONS=326} [2024-06-21 18:53:18,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 18:53:18,186 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 326 transitions, 4693 flow [2024-06-21 18:53:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:18,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:18,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:53:18,187 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1145002812, now seen corresponding path program 14 times [2024-06-21 18:53:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696987052] [2024-06-21 18:53:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:19,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:19,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696987052] [2024-06-21 18:53:19,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696987052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:19,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:19,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134386743] [2024-06-21 18:53:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:19,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:19,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:20,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:20,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 326 transitions, 4693 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:20,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:20,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:20,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:21,064 INFO L124 PetriNetUnfolderBase]: 2782/4333 cut-off events. [2024-06-21 18:53:21,064 INFO L125 PetriNetUnfolderBase]: For 313854/313854 co-relation queries the response was YES. [2024-06-21 18:53:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37849 conditions, 4333 events. 2782/4333 cut-off events. For 313854/313854 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23543 event pairs, 584 based on Foata normal form. 2/4333 useless extension candidates. Maximal degree in co-relation 37749. Up to 3843 conditions per place. [2024-06-21 18:53:21,114 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 233 selfloop transitions, 130 changer transitions 0/369 dead transitions. [2024-06-21 18:53:21,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 369 transitions, 5859 flow [2024-06-21 18:53:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 18:53:21,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 18:53:21,116 INFO L175 Difference]: Start difference. First operand has 213 places, 326 transitions, 4693 flow. Second operand 10 states and 192 transitions. [2024-06-21 18:53:21,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 369 transitions, 5859 flow [2024-06-21 18:53:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 369 transitions, 5485 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:21,502 INFO L231 Difference]: Finished difference. Result has 217 places, 335 transitions, 4805 flow [2024-06-21 18:53:21,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4805, PETRI_PLACES=217, PETRI_TRANSITIONS=335} [2024-06-21 18:53:21,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 18:53:21,503 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 335 transitions, 4805 flow [2024-06-21 18:53:21,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:21,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:21,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:53:21,503 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:21,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1145002564, now seen corresponding path program 5 times [2024-06-21 18:53:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:21,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455021143] [2024-06-21 18:53:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455021143] [2024-06-21 18:53:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455021143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:23,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:23,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:23,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097367732] [2024-06-21 18:53:23,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:23,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:23,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:23,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 335 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:23,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:23,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:23,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:24,539 INFO L124 PetriNetUnfolderBase]: 2785/4344 cut-off events. [2024-06-21 18:53:24,539 INFO L125 PetriNetUnfolderBase]: For 325772/325774 co-relation queries the response was YES. [2024-06-21 18:53:24,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38097 conditions, 4344 events. 2785/4344 cut-off events. For 325772/325774 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23753 event pairs, 675 based on Foata normal form. 6/4348 useless extension candidates. Maximal degree in co-relation 37996. Up to 4045 conditions per place. [2024-06-21 18:53:24,581 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 40 changer transitions 0/371 dead transitions. [2024-06-21 18:53:24,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 371 transitions, 5718 flow [2024-06-21 18:53:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 18:53:24,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 18:53:24,583 INFO L175 Difference]: Start difference. First operand has 217 places, 335 transitions, 4805 flow. Second operand 10 states and 185 transitions. [2024-06-21 18:53:24,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 371 transitions, 5718 flow [2024-06-21 18:53:24,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 371 transitions, 5352 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:24,870 INFO L231 Difference]: Finished difference. Result has 218 places, 338 transitions, 4608 flow [2024-06-21 18:53:24,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4608, PETRI_PLACES=218, PETRI_TRANSITIONS=338} [2024-06-21 18:53:24,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 18:53:24,871 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 338 transitions, 4608 flow [2024-06-21 18:53:24,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:24,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:24,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:24,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:53:24,872 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:24,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1145182302, now seen corresponding path program 15 times [2024-06-21 18:53:24,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:24,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339730161] [2024-06-21 18:53:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:24,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:26,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:26,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339730161] [2024-06-21 18:53:26,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339730161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:26,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:26,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:26,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497649329] [2024-06-21 18:53:26,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:26,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:27,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 338 transitions, 4608 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:27,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:27,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:27,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:28,258 INFO L124 PetriNetUnfolderBase]: 2780/4331 cut-off events. [2024-06-21 18:53:28,258 INFO L125 PetriNetUnfolderBase]: For 332934/332934 co-relation queries the response was YES. [2024-06-21 18:53:28,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37697 conditions, 4331 events. 2780/4331 cut-off events. For 332934/332934 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23527 event pairs, 582 based on Foata normal form. 2/4331 useless extension candidates. Maximal degree in co-relation 37596. Up to 3918 conditions per place. [2024-06-21 18:53:28,302 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 270 selfloop transitions, 94 changer transitions 0/370 dead transitions. [2024-06-21 18:53:28,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 370 transitions, 5444 flow [2024-06-21 18:53:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 18:53:28,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:53:28,304 INFO L175 Difference]: Start difference. First operand has 218 places, 338 transitions, 4608 flow. Second operand 10 states and 190 transitions. [2024-06-21 18:53:28,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 370 transitions, 5444 flow [2024-06-21 18:53:28,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 370 transitions, 5260 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:28,653 INFO L231 Difference]: Finished difference. Result has 221 places, 338 transitions, 4624 flow [2024-06-21 18:53:28,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4624, PETRI_PLACES=221, PETRI_TRANSITIONS=338} [2024-06-21 18:53:28,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 18:53:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 338 transitions, 4624 flow [2024-06-21 18:53:28,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:28,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:28,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:53:28,655 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:28,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -870418308, now seen corresponding path program 3 times [2024-06-21 18:53:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403012787] [2024-06-21 18:53:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:28,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:29,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:29,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403012787] [2024-06-21 18:53:29,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403012787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:29,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:29,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:53:29,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68566270] [2024-06-21 18:53:29,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:29,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:53:29,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:29,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:53:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:53:29,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:29,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 338 transitions, 4624 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:29,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:29,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:29,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:30,714 INFO L124 PetriNetUnfolderBase]: 2784/4337 cut-off events. [2024-06-21 18:53:30,714 INFO L125 PetriNetUnfolderBase]: For 341465/341465 co-relation queries the response was YES. [2024-06-21 18:53:30,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37818 conditions, 4337 events. 2784/4337 cut-off events. For 341465/341465 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23612 event pairs, 583 based on Foata normal form. 2/4337 useless extension candidates. Maximal degree in co-relation 37716. Up to 4035 conditions per place. [2024-06-21 18:53:30,761 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 47 changer transitions 0/360 dead transitions. [2024-06-21 18:53:30,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 360 transitions, 5454 flow [2024-06-21 18:53:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:53:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:53:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 18:53:30,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 18:53:30,762 INFO L175 Difference]: Start difference. First operand has 221 places, 338 transitions, 4624 flow. Second operand 7 states and 135 transitions. [2024-06-21 18:53:30,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 360 transitions, 5454 flow [2024-06-21 18:53:31,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 360 transitions, 4980 flow, removed 55 selfloop flow, removed 11 redundant places. [2024-06-21 18:53:31,060 INFO L231 Difference]: Finished difference. Result has 217 places, 341 transitions, 4287 flow [2024-06-21 18:53:31,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4287, PETRI_PLACES=217, PETRI_TRANSITIONS=341} [2024-06-21 18:53:31,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 18:53:31,061 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 341 transitions, 4287 flow [2024-06-21 18:53:31,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:31,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:31,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:31,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:53:31,061 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:31,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 874137724, now seen corresponding path program 1 times [2024-06-21 18:53:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:31,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551583611] [2024-06-21 18:53:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:31,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551583611] [2024-06-21 18:53:32,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551583611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:32,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:32,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:53:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055899697] [2024-06-21 18:53:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:53:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:32,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:53:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:53:32,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:53:32,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 341 transitions, 4287 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 18:53:32,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:32,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:53:32,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:32,920 INFO L124 PetriNetUnfolderBase]: 2582/4119 cut-off events. [2024-06-21 18:53:32,920 INFO L125 PetriNetUnfolderBase]: For 305557/305557 co-relation queries the response was YES. [2024-06-21 18:53:32,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34388 conditions, 4119 events. 2582/4119 cut-off events. For 305557/305557 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23023 event pairs, 727 based on Foata normal form. 1/4118 useless extension candidates. Maximal degree in co-relation 34287. Up to 3827 conditions per place. [2024-06-21 18:53:32,964 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 18 changer transitions 0/359 dead transitions. [2024-06-21 18:53:32,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 359 transitions, 5181 flow [2024-06-21 18:53:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:53:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:53:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 18:53:32,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 18:53:32,966 INFO L175 Difference]: Start difference. First operand has 217 places, 341 transitions, 4287 flow. Second operand 6 states and 118 transitions. [2024-06-21 18:53:32,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 359 transitions, 5181 flow [2024-06-21 18:53:33,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 359 transitions, 5101 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:53:33,224 INFO L231 Difference]: Finished difference. Result has 219 places, 347 transitions, 4307 flow [2024-06-21 18:53:33,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4307, PETRI_PLACES=219, PETRI_TRANSITIONS=347} [2024-06-21 18:53:33,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 18:53:33,225 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 347 transitions, 4307 flow [2024-06-21 18:53:33,225 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 18:53:33,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:33,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:33,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:53:33,226 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:33,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1853123614, now seen corresponding path program 2 times [2024-06-21 18:53:33,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:33,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613820497] [2024-06-21 18:53:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613820497] [2024-06-21 18:53:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613820497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:34,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:34,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:53:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359029683] [2024-06-21 18:53:34,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:53:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:53:34,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:53:34,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:53:34,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 347 transitions, 4307 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 18:53:34,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:34,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:53:34,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:35,082 INFO L124 PetriNetUnfolderBase]: 2579/4115 cut-off events. [2024-06-21 18:53:35,082 INFO L125 PetriNetUnfolderBase]: For 313611/313611 co-relation queries the response was YES. [2024-06-21 18:53:35,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34741 conditions, 4115 events. 2579/4115 cut-off events. For 313611/313611 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22989 event pairs, 726 based on Foata normal form. 1/4114 useless extension candidates. Maximal degree in co-relation 34639. Up to 3836 conditions per place. [2024-06-21 18:53:35,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 335 selfloop transitions, 13 changer transitions 0/355 dead transitions. [2024-06-21 18:53:35,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 355 transitions, 5027 flow [2024-06-21 18:53:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:53:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:53:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 18:53:35,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 18:53:35,134 INFO L175 Difference]: Start difference. First operand has 219 places, 347 transitions, 4307 flow. Second operand 7 states and 123 transitions. [2024-06-21 18:53:35,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 355 transitions, 5027 flow [2024-06-21 18:53:35,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 355 transitions, 4980 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 18:53:35,452 INFO L231 Difference]: Finished difference. Result has 224 places, 347 transitions, 4292 flow [2024-06-21 18:53:35,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4292, PETRI_PLACES=224, PETRI_TRANSITIONS=347} [2024-06-21 18:53:35,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 18:53:35,453 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 347 transitions, 4292 flow [2024-06-21 18:53:35,453 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 18:53:35,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:35,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:35,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:53:35,453 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:35,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash 879859580, now seen corresponding path program 1 times [2024-06-21 18:53:35,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:35,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989475508] [2024-06-21 18:53:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:35,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:36,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:36,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989475508] [2024-06-21 18:53:36,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989475508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:36,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:36,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:53:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238937708] [2024-06-21 18:53:36,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:36,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:53:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:53:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:53:37,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:37,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 347 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:37,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:37,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:37,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:38,097 INFO L124 PetriNetUnfolderBase]: 2689/4223 cut-off events. [2024-06-21 18:53:38,097 INFO L125 PetriNetUnfolderBase]: For 324357/324357 co-relation queries the response was YES. [2024-06-21 18:53:38,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35728 conditions, 4223 events. 2689/4223 cut-off events. For 324357/324357 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23137 event pairs, 758 based on Foata normal form. 2/4223 useless extension candidates. Maximal degree in co-relation 35624. Up to 4027 conditions per place. [2024-06-21 18:53:38,144 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 16 changer transitions 0/360 dead transitions. [2024-06-21 18:53:38,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 360 transitions, 5064 flow [2024-06-21 18:53:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:53:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:53:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 18:53:38,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 18:53:38,145 INFO L175 Difference]: Start difference. First operand has 224 places, 347 transitions, 4292 flow. Second operand 7 states and 122 transitions. [2024-06-21 18:53:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 360 transitions, 5064 flow [2024-06-21 18:53:38,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 360 transitions, 5030 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:38,586 INFO L231 Difference]: Finished difference. Result has 225 places, 350 transitions, 4338 flow [2024-06-21 18:53:38,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4338, PETRI_PLACES=225, PETRI_TRANSITIONS=350} [2024-06-21 18:53:38,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 18:53:38,586 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 350 transitions, 4338 flow [2024-06-21 18:53:38,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:38,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:38,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:53:38,587 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:38,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 933808018, now seen corresponding path program 1 times [2024-06-21 18:53:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884752016] [2024-06-21 18:53:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:40,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884752016] [2024-06-21 18:53:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884752016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:40,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:40,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:53:40,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000899306] [2024-06-21 18:53:40,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:53:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:53:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:53:40,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:40,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 350 transitions, 4338 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:40,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:40,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:40,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:42,231 INFO L124 PetriNetUnfolderBase]: 2845/4438 cut-off events. [2024-06-21 18:53:42,232 INFO L125 PetriNetUnfolderBase]: For 401501/401501 co-relation queries the response was YES. [2024-06-21 18:53:42,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39458 conditions, 4438 events. 2845/4438 cut-off events. For 401501/401501 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24253 event pairs, 532 based on Foata normal form. 16/4450 useless extension candidates. Maximal degree in co-relation 39352. Up to 4012 conditions per place. [2024-06-21 18:53:42,279 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 316 selfloop transitions, 63 changer transitions 0/385 dead transitions. [2024-06-21 18:53:42,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 385 transitions, 5321 flow [2024-06-21 18:53:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:53:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:53:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 18:53:42,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 18:53:42,281 INFO L175 Difference]: Start difference. First operand has 225 places, 350 transitions, 4338 flow. Second operand 11 states and 200 transitions. [2024-06-21 18:53:42,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 385 transitions, 5321 flow [2024-06-21 18:53:42,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 385 transitions, 5273 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:42,715 INFO L231 Difference]: Finished difference. Result has 231 places, 351 transitions, 4490 flow [2024-06-21 18:53:42,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4490, PETRI_PLACES=231, PETRI_TRANSITIONS=351} [2024-06-21 18:53:42,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 18:53:42,716 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 351 transitions, 4490 flow [2024-06-21 18:53:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:42,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:42,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:42,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:53:42,717 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 179136, now seen corresponding path program 2 times [2024-06-21 18:53:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535755759] [2024-06-21 18:53:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535755759] [2024-06-21 18:53:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535755759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:45,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:45,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071950587] [2024-06-21 18:53:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:45,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:45,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:45,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:45,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:45,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 351 transitions, 4490 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:45,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:45,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:45,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:46,600 INFO L124 PetriNetUnfolderBase]: 2896/4522 cut-off events. [2024-06-21 18:53:46,600 INFO L125 PetriNetUnfolderBase]: For 419248/419248 co-relation queries the response was YES. [2024-06-21 18:53:46,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40831 conditions, 4522 events. 2896/4522 cut-off events. For 419248/419248 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24839 event pairs, 611 based on Foata normal form. 16/4534 useless extension candidates. Maximal degree in co-relation 40724. Up to 4044 conditions per place. [2024-06-21 18:53:46,657 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 297 selfloop transitions, 83 changer transitions 0/386 dead transitions. [2024-06-21 18:53:46,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 386 transitions, 5482 flow [2024-06-21 18:53:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:53:46,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 18:53:46,659 INFO L175 Difference]: Start difference. First operand has 231 places, 351 transitions, 4490 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:53:46,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 386 transitions, 5482 flow [2024-06-21 18:53:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 386 transitions, 5333 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:47,081 INFO L231 Difference]: Finished difference. Result has 232 places, 352 transitions, 4584 flow [2024-06-21 18:53:47,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4584, PETRI_PLACES=232, PETRI_TRANSITIONS=352} [2024-06-21 18:53:47,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 18:53:47,082 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 352 transitions, 4584 flow [2024-06-21 18:53:47,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:47,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:47,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:47,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:53:47,086 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:47,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash 218229372, now seen corresponding path program 3 times [2024-06-21 18:53:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894612706] [2024-06-21 18:53:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:49,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894612706] [2024-06-21 18:53:49,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894612706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:49,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:49,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:49,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524639318] [2024-06-21 18:53:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:49,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:49,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:49,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 352 transitions, 4584 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:49,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:49,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:49,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:50,659 INFO L124 PetriNetUnfolderBase]: 2954/4620 cut-off events. [2024-06-21 18:53:50,659 INFO L125 PetriNetUnfolderBase]: For 439025/439025 co-relation queries the response was YES. [2024-06-21 18:53:50,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41988 conditions, 4620 events. 2954/4620 cut-off events. For 439025/439025 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25629 event pairs, 621 based on Foata normal form. 16/4632 useless extension candidates. Maximal degree in co-relation 41880. Up to 4142 conditions per place. [2024-06-21 18:53:50,711 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 295 selfloop transitions, 86 changer transitions 0/387 dead transitions. [2024-06-21 18:53:50,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 387 transitions, 5580 flow [2024-06-21 18:53:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:53:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:53:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 18:53:50,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2024-06-21 18:53:50,713 INFO L175 Difference]: Start difference. First operand has 232 places, 352 transitions, 4584 flow. Second operand 11 states and 202 transitions. [2024-06-21 18:53:50,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 387 transitions, 5580 flow [2024-06-21 18:53:51,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 387 transitions, 5389 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:51,153 INFO L231 Difference]: Finished difference. Result has 235 places, 353 transitions, 4644 flow [2024-06-21 18:53:51,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4644, PETRI_PLACES=235, PETRI_TRANSITIONS=353} [2024-06-21 18:53:51,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 18:53:51,154 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 353 transitions, 4644 flow [2024-06-21 18:53:51,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:51,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:51,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:53:51,155 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:51,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash 218431182, now seen corresponding path program 4 times [2024-06-21 18:53:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:51,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174906821] [2024-06-21 18:53:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:52,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:52,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174906821] [2024-06-21 18:53:52,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174906821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:52,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:52,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:52,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131369352] [2024-06-21 18:53:52,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:52,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:52,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:52,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:53,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:53,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 353 transitions, 4644 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:53,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:53,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:53,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:54,426 INFO L124 PetriNetUnfolderBase]: 3012/4728 cut-off events. [2024-06-21 18:53:54,426 INFO L125 PetriNetUnfolderBase]: For 457073/457073 co-relation queries the response was YES. [2024-06-21 18:53:54,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43112 conditions, 4728 events. 3012/4728 cut-off events. For 457073/457073 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26483 event pairs, 636 based on Foata normal form. 16/4740 useless extension candidates. Maximal degree in co-relation 43003. Up to 4249 conditions per place. [2024-06-21 18:53:54,476 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 297 selfloop transitions, 85 changer transitions 0/388 dead transitions. [2024-06-21 18:53:54,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 388 transitions, 5644 flow [2024-06-21 18:53:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:53:54,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 18:53:54,487 INFO L175 Difference]: Start difference. First operand has 235 places, 353 transitions, 4644 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:53:54,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 388 transitions, 5644 flow [2024-06-21 18:53:54,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 388 transitions, 5445 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:54,958 INFO L231 Difference]: Finished difference. Result has 236 places, 354 transitions, 4696 flow [2024-06-21 18:53:54,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4696, PETRI_PLACES=236, PETRI_TRANSITIONS=354} [2024-06-21 18:53:54,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 18:53:54,959 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 354 transitions, 4696 flow [2024-06-21 18:53:54,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:54,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:54,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:54,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:53:54,960 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:54,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1986819022, now seen corresponding path program 5 times [2024-06-21 18:53:54,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:54,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837127940] [2024-06-21 18:53:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:56,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:56,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837127940] [2024-06-21 18:53:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837127940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:56,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:56,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:53:56,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144916927] [2024-06-21 18:53:56,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:56,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:53:56,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:56,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:53:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:53:57,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:53:57,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 354 transitions, 4696 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:57,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:57,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:53:57,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:58,466 INFO L124 PetriNetUnfolderBase]: 3053/4799 cut-off events. [2024-06-21 18:53:58,466 INFO L125 PetriNetUnfolderBase]: For 468159/468159 co-relation queries the response was YES. [2024-06-21 18:53:58,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43879 conditions, 4799 events. 3053/4799 cut-off events. For 468159/468159 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27000 event pairs, 627 based on Foata normal form. 12/4807 useless extension candidates. Maximal degree in co-relation 43769. Up to 3847 conditions per place. [2024-06-21 18:53:58,528 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 269 selfloop transitions, 117 changer transitions 0/392 dead transitions. [2024-06-21 18:53:58,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 392 transitions, 5742 flow [2024-06-21 18:53:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:53:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:53:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 18:53:58,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-21 18:53:58,530 INFO L175 Difference]: Start difference. First operand has 236 places, 354 transitions, 4696 flow. Second operand 11 states and 205 transitions. [2024-06-21 18:53:58,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 392 transitions, 5742 flow [2024-06-21 18:53:59,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 392 transitions, 5543 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:59,040 INFO L231 Difference]: Finished difference. Result has 239 places, 355 transitions, 4812 flow [2024-06-21 18:53:59,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4812, PETRI_PLACES=239, PETRI_TRANSITIONS=355} [2024-06-21 18:53:59,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 18:53:59,041 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 355 transitions, 4812 flow [2024-06-21 18:53:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:59,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:59,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:53:59,041 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:59,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1493450074, now seen corresponding path program 1 times [2024-06-21 18:53:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:59,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239544979] [2024-06-21 18:53:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:00,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:00,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239544979] [2024-06-21 18:54:00,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239544979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:00,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:00,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:54:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467940662] [2024-06-21 18:54:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:00,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:54:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:54:00,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:54:00,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:54:00,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 355 transitions, 4812 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:00,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:54:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:01,648 INFO L124 PetriNetUnfolderBase]: 3192/4948 cut-off events. [2024-06-21 18:54:01,649 INFO L125 PetriNetUnfolderBase]: For 468476/468476 co-relation queries the response was YES. [2024-06-21 18:54:01,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45361 conditions, 4948 events. 3192/4948 cut-off events. For 468476/468476 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27410 event pairs, 648 based on Foata normal form. 2/4946 useless extension candidates. Maximal degree in co-relation 45250. Up to 4691 conditions per place. [2024-06-21 18:54:01,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 52 changer transitions 0/382 dead transitions. [2024-06-21 18:54:01,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 382 transitions, 6082 flow [2024-06-21 18:54:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:54:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:54:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 18:54:01,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 18:54:01,706 INFO L175 Difference]: Start difference. First operand has 239 places, 355 transitions, 4812 flow. Second operand 7 states and 132 transitions. [2024-06-21 18:54:01,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 382 transitions, 6082 flow [2024-06-21 18:54:02,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 382 transitions, 5809 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:02,191 INFO L231 Difference]: Finished difference. Result has 237 places, 364 transitions, 4820 flow [2024-06-21 18:54:02,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4820, PETRI_PLACES=237, PETRI_TRANSITIONS=364} [2024-06-21 18:54:02,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 18:54:02,192 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 364 transitions, 4820 flow [2024-06-21 18:54:02,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:02,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:02,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:54:02,192 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:02,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1655205582, now seen corresponding path program 6 times [2024-06-21 18:54:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16284143] [2024-06-21 18:54:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:04,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:04,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16284143] [2024-06-21 18:54:04,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16284143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:04,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:04,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:04,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294871970] [2024-06-21 18:54:04,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:04,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:04,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:04,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:04,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 364 transitions, 4820 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:04,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:04,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:04,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:06,091 INFO L124 PetriNetUnfolderBase]: 3156/4963 cut-off events. [2024-06-21 18:54:06,091 INFO L125 PetriNetUnfolderBase]: For 511936/511936 co-relation queries the response was YES. [2024-06-21 18:54:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45876 conditions, 4963 events. 3156/4963 cut-off events. For 511936/511936 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28128 event pairs, 637 based on Foata normal form. 16/4975 useless extension candidates. Maximal degree in co-relation 45763. Up to 4078 conditions per place. [2024-06-21 18:54:06,150 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 209 changer transitions 0/399 dead transitions. [2024-06-21 18:54:06,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 399 transitions, 5844 flow [2024-06-21 18:54:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 18:54:06,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 18:54:06,152 INFO L175 Difference]: Start difference. First operand has 237 places, 364 transitions, 4820 flow. Second operand 11 states and 204 transitions. [2024-06-21 18:54:06,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 399 transitions, 5844 flow [2024-06-21 18:54:06,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 399 transitions, 5770 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 18:54:06,954 INFO L231 Difference]: Finished difference. Result has 245 places, 365 transitions, 5247 flow [2024-06-21 18:54:06,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5247, PETRI_PLACES=245, PETRI_TRANSITIONS=365} [2024-06-21 18:54:06,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 18:54:06,955 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 365 transitions, 5247 flow [2024-06-21 18:54:06,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:06,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:06,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:06,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:54:06,956 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:06,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1026187540, now seen corresponding path program 7 times [2024-06-21 18:54:06,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:06,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096694836] [2024-06-21 18:54:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:06,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:08,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:08,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096694836] [2024-06-21 18:54:08,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096694836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:08,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:08,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:08,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27096565] [2024-06-21 18:54:08,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:08,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:08,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:09,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:09,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 365 transitions, 5247 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:09,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:09,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:09,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:10,465 INFO L124 PetriNetUnfolderBase]: 3205/5064 cut-off events. [2024-06-21 18:54:10,466 INFO L125 PetriNetUnfolderBase]: For 525838/525838 co-relation queries the response was YES. [2024-06-21 18:54:10,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47668 conditions, 5064 events. 3205/5064 cut-off events. For 525838/525838 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29100 event pairs, 630 based on Foata normal form. 12/5072 useless extension candidates. Maximal degree in co-relation 47553. Up to 4082 conditions per place. [2024-06-21 18:54:10,529 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 185 selfloop transitions, 211 changer transitions 0/405 dead transitions. [2024-06-21 18:54:10,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 405 transitions, 6339 flow [2024-06-21 18:54:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:54:10,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 18:54:10,531 INFO L175 Difference]: Start difference. First operand has 245 places, 365 transitions, 5247 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:54:10,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 405 transitions, 6339 flow [2024-06-21 18:54:11,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 405 transitions, 5886 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:11,218 INFO L231 Difference]: Finished difference. Result has 248 places, 368 transitions, 5326 flow [2024-06-21 18:54:11,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5326, PETRI_PLACES=248, PETRI_TRANSITIONS=368} [2024-06-21 18:54:11,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 18:54:11,219 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 368 transitions, 5326 flow [2024-06-21 18:54:11,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:11,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:11,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:11,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:54:11,219 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:11,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1016990770, now seen corresponding path program 8 times [2024-06-21 18:54:11,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:11,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727680929] [2024-06-21 18:54:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:11,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:13,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:13,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727680929] [2024-06-21 18:54:13,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727680929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:13,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:13,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:13,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612230167] [2024-06-21 18:54:13,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:13,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:13,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 368 transitions, 5326 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:13,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:13,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:13,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:14,834 INFO L124 PetriNetUnfolderBase]: 3308/5249 cut-off events. [2024-06-21 18:54:14,835 INFO L125 PetriNetUnfolderBase]: For 571336/571336 co-relation queries the response was YES. [2024-06-21 18:54:14,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50281 conditions, 5249 events. 3308/5249 cut-off events. For 571336/571336 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30465 event pairs, 570 based on Foata normal form. 12/5257 useless extension candidates. Maximal degree in co-relation 50164. Up to 3220 conditions per place. [2024-06-21 18:54:14,898 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 175 selfloop transitions, 226 changer transitions 0/410 dead transitions. [2024-06-21 18:54:14,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 410 transitions, 6724 flow [2024-06-21 18:54:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:54:14,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:54:14,900 INFO L175 Difference]: Start difference. First operand has 248 places, 368 transitions, 5326 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:54:14,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 410 transitions, 6724 flow [2024-06-21 18:54:15,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 410 transitions, 6264 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:15,608 INFO L231 Difference]: Finished difference. Result has 251 places, 370 transitions, 5482 flow [2024-06-21 18:54:15,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4866, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5482, PETRI_PLACES=251, PETRI_TRANSITIONS=370} [2024-06-21 18:54:15,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 18:54:15,609 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 370 transitions, 5482 flow [2024-06-21 18:54:15,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:15,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:15,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:54:15,609 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:15,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1282688050, now seen corresponding path program 9 times [2024-06-21 18:54:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400263755] [2024-06-21 18:54:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:17,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400263755] [2024-06-21 18:54:17,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400263755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:17,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:17,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423448962] [2024-06-21 18:54:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:17,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 370 transitions, 5482 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:17,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:17,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:17,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:19,063 INFO L124 PetriNetUnfolderBase]: 3441/5468 cut-off events. [2024-06-21 18:54:19,064 INFO L125 PetriNetUnfolderBase]: For 631462/631462 co-relation queries the response was YES. [2024-06-21 18:54:19,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53888 conditions, 5468 events. 3441/5468 cut-off events. For 631462/631462 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32218 event pairs, 710 based on Foata normal form. 12/5476 useless extension candidates. Maximal degree in co-relation 53770. Up to 4627 conditions per place. [2024-06-21 18:54:19,144 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 142 changer transitions 0/411 dead transitions. [2024-06-21 18:54:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 411 transitions, 6888 flow [2024-06-21 18:54:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:54:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 18:54:19,146 INFO L175 Difference]: Start difference. First operand has 251 places, 370 transitions, 5482 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:54:19,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 411 transitions, 6888 flow [2024-06-21 18:54:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 411 transitions, 6575 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 18:54:19,961 INFO L231 Difference]: Finished difference. Result has 255 places, 372 transitions, 5621 flow [2024-06-21 18:54:19,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5621, PETRI_PLACES=255, PETRI_TRANSITIONS=372} [2024-06-21 18:54:19,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 18:54:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 372 transitions, 5621 flow [2024-06-21 18:54:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:19,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:19,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:54:19,962 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:19,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:19,962 INFO L85 PathProgramCache]: Analyzing trace with hash -993651240, now seen corresponding path program 10 times [2024-06-21 18:54:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290201198] [2024-06-21 18:54:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:21,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:21,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290201198] [2024-06-21 18:54:21,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290201198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:21,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:21,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:21,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945836361] [2024-06-21 18:54:21,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:21,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:21,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:22,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:22,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 372 transitions, 5621 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:22,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:22,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:22,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:23,779 INFO L124 PetriNetUnfolderBase]: 3499/5566 cut-off events. [2024-06-21 18:54:23,780 INFO L125 PetriNetUnfolderBase]: For 660676/660676 co-relation queries the response was YES. [2024-06-21 18:54:23,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55288 conditions, 5566 events. 3499/5566 cut-off events. For 660676/660676 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33092 event pairs, 735 based on Foata normal form. 16/5578 useless extension candidates. Maximal degree in co-relation 55168. Up to 4972 conditions per place. [2024-06-21 18:54:23,844 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 291 selfloop transitions, 107 changer transitions 0/407 dead transitions. [2024-06-21 18:54:23,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 407 transitions, 6667 flow [2024-06-21 18:54:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 18:54:23,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 18:54:23,845 INFO L175 Difference]: Start difference. First operand has 255 places, 372 transitions, 5621 flow. Second operand 10 states and 192 transitions. [2024-06-21 18:54:23,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 407 transitions, 6667 flow [2024-06-21 18:54:24,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 407 transitions, 6441 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:24,442 INFO L231 Difference]: Finished difference. Result has 257 places, 373 transitions, 5698 flow [2024-06-21 18:54:24,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5698, PETRI_PLACES=257, PETRI_TRANSITIONS=373} [2024-06-21 18:54:24,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 18:54:24,443 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 373 transitions, 5698 flow [2024-06-21 18:54:24,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:24,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:24,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:24,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:54:24,443 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:24,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1398503262, now seen corresponding path program 11 times [2024-06-21 18:54:24,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192003133] [2024-06-21 18:54:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192003133] [2024-06-21 18:54:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192003133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:26,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:26,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551371227] [2024-06-21 18:54:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:26,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:26,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:26,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 373 transitions, 5698 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:26,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:26,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:26,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:27,944 INFO L124 PetriNetUnfolderBase]: 3471/5522 cut-off events. [2024-06-21 18:54:27,945 INFO L125 PetriNetUnfolderBase]: For 644928/644928 co-relation queries the response was YES. [2024-06-21 18:54:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54045 conditions, 5522 events. 3471/5522 cut-off events. For 644928/644928 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32743 event pairs, 719 based on Foata normal form. 16/5534 useless extension candidates. Maximal degree in co-relation 53924. Up to 4832 conditions per place. [2024-06-21 18:54:28,011 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 263 selfloop transitions, 135 changer transitions 0/407 dead transitions. [2024-06-21 18:54:28,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 407 transitions, 6664 flow [2024-06-21 18:54:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 18:54:28,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2024-06-21 18:54:28,013 INFO L175 Difference]: Start difference. First operand has 257 places, 373 transitions, 5698 flow. Second operand 11 states and 202 transitions. [2024-06-21 18:54:28,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 407 transitions, 6664 flow [2024-06-21 18:54:28,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 407 transitions, 6375 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:28,921 INFO L231 Difference]: Finished difference. Result has 260 places, 373 transitions, 5686 flow [2024-06-21 18:54:28,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5686, PETRI_PLACES=260, PETRI_TRANSITIONS=373} [2024-06-21 18:54:28,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 18:54:28,930 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 373 transitions, 5686 flow [2024-06-21 18:54:28,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:28,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:28,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:28,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:54:28,931 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:28,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash 700021460, now seen corresponding path program 12 times [2024-06-21 18:54:28,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:28,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542414344] [2024-06-21 18:54:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:28,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542414344] [2024-06-21 18:54:30,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542414344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:30,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:30,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:30,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412752239] [2024-06-21 18:54:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:30,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:30,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:30,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:30,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 373 transitions, 5686 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:30,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:30,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:30,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:32,527 INFO L124 PetriNetUnfolderBase]: 3529/5630 cut-off events. [2024-06-21 18:54:32,527 INFO L125 PetriNetUnfolderBase]: For 657851/657851 co-relation queries the response was YES. [2024-06-21 18:54:32,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54944 conditions, 5630 events. 3529/5630 cut-off events. For 657851/657851 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33686 event pairs, 734 based on Foata normal form. 16/5642 useless extension candidates. Maximal degree in co-relation 54822. Up to 5026 conditions per place. [2024-06-21 18:54:32,592 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 301 selfloop transitions, 98 changer transitions 0/408 dead transitions. [2024-06-21 18:54:32,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 408 transitions, 6734 flow [2024-06-21 18:54:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 18:54:32,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 18:54:32,593 INFO L175 Difference]: Start difference. First operand has 260 places, 373 transitions, 5686 flow. Second operand 10 states and 192 transitions. [2024-06-21 18:54:32,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 408 transitions, 6734 flow [2024-06-21 18:54:33,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 408 transitions, 6463 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:33,420 INFO L231 Difference]: Finished difference. Result has 261 places, 374 transitions, 5700 flow [2024-06-21 18:54:33,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5415, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5700, PETRI_PLACES=261, PETRI_TRANSITIONS=374} [2024-06-21 18:54:33,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 18:54:33,421 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 374 transitions, 5700 flow [2024-06-21 18:54:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:33,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:33,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:33,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:54:33,422 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:33,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash 700028900, now seen corresponding path program 13 times [2024-06-21 18:54:33,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012626785] [2024-06-21 18:54:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:35,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:35,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012626785] [2024-06-21 18:54:35,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012626785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:35,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:35,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:35,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840700422] [2024-06-21 18:54:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:35,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:35,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:35,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:35,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 374 transitions, 5700 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:35,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:35,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:35,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:37,406 INFO L124 PetriNetUnfolderBase]: 3649/5836 cut-off events. [2024-06-21 18:54:37,406 INFO L125 PetriNetUnfolderBase]: For 713187/713187 co-relation queries the response was YES. [2024-06-21 18:54:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58510 conditions, 5836 events. 3649/5836 cut-off events. For 713187/713187 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35401 event pairs, 788 based on Foata normal form. 12/5844 useless extension candidates. Maximal degree in co-relation 58387. Up to 4884 conditions per place. [2024-06-21 18:54:37,487 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 272 selfloop transitions, 134 changer transitions 0/415 dead transitions. [2024-06-21 18:54:37,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 415 transitions, 7134 flow [2024-06-21 18:54:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:54:37,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:54:37,489 INFO L175 Difference]: Start difference. First operand has 261 places, 374 transitions, 5700 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:54:37,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 415 transitions, 7134 flow [2024-06-21 18:54:38,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 415 transitions, 6899 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:38,533 INFO L231 Difference]: Finished difference. Result has 264 places, 376 transitions, 5905 flow [2024-06-21 18:54:38,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5905, PETRI_PLACES=264, PETRI_TRANSITIONS=376} [2024-06-21 18:54:38,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 18:54:38,533 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 376 transitions, 5905 flow [2024-06-21 18:54:38,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:38,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:38,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:38,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:54:38,534 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:38,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash 242101642, now seen corresponding path program 14 times [2024-06-21 18:54:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271454236] [2024-06-21 18:54:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:40,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:40,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271454236] [2024-06-21 18:54:40,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271454236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:40,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:40,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397292302] [2024-06-21 18:54:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:40,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:40,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:40,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:40,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:40,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 376 transitions, 5905 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:40,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:40,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:42,714 INFO L124 PetriNetUnfolderBase]: 3707/5934 cut-off events. [2024-06-21 18:54:42,714 INFO L125 PetriNetUnfolderBase]: For 745665/745665 co-relation queries the response was YES. [2024-06-21 18:54:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59818 conditions, 5934 events. 3707/5934 cut-off events. For 745665/745665 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36268 event pairs, 813 based on Foata normal form. 16/5946 useless extension candidates. Maximal degree in co-relation 59694. Up to 5234 conditions per place. [2024-06-21 18:54:42,783 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 279 selfloop transitions, 123 changer transitions 0/411 dead transitions. [2024-06-21 18:54:42,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 411 transitions, 6963 flow [2024-06-21 18:54:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 18:54:42,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 18:54:42,785 INFO L175 Difference]: Start difference. First operand has 264 places, 376 transitions, 5905 flow. Second operand 11 states and 204 transitions. [2024-06-21 18:54:42,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 411 transitions, 6963 flow [2024-06-21 18:54:43,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 411 transitions, 6759 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 18:54:43,730 INFO L231 Difference]: Finished difference. Result has 268 places, 377 transitions, 6040 flow [2024-06-21 18:54:43,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5703, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6040, PETRI_PLACES=268, PETRI_TRANSITIONS=377} [2024-06-21 18:54:43,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 18:54:43,731 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 377 transitions, 6040 flow [2024-06-21 18:54:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:43,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:43,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:43,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:54:43,732 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:43,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash 236739262, now seen corresponding path program 15 times [2024-06-21 18:54:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:43,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886915416] [2024-06-21 18:54:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:43,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886915416] [2024-06-21 18:54:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886915416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:46,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:46,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703124654] [2024-06-21 18:54:46,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:46,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:54:46,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 377 transitions, 6040 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:46,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:54:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:48,037 INFO L124 PetriNetUnfolderBase]: 3679/5890 cut-off events. [2024-06-21 18:54:48,038 INFO L125 PetriNetUnfolderBase]: For 725485/725485 co-relation queries the response was YES. [2024-06-21 18:54:48,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58575 conditions, 5890 events. 3679/5890 cut-off events. For 725485/725485 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35944 event pairs, 759 based on Foata normal form. 16/5902 useless extension candidates. Maximal degree in co-relation 58449. Up to 5190 conditions per place. [2024-06-21 18:54:48,111 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 124 changer transitions 0/411 dead transitions. [2024-06-21 18:54:48,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 411 transitions, 7014 flow [2024-06-21 18:54:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 18:54:48,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 18:54:48,113 INFO L175 Difference]: Start difference. First operand has 268 places, 377 transitions, 6040 flow. Second operand 11 states and 203 transitions. [2024-06-21 18:54:48,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 411 transitions, 7014 flow [2024-06-21 18:54:49,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 411 transitions, 6693 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:49,369 INFO L231 Difference]: Finished difference. Result has 270 places, 377 transitions, 5974 flow [2024-06-21 18:54:49,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5974, PETRI_PLACES=270, PETRI_TRANSITIONS=377} [2024-06-21 18:54:49,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 18:54:49,370 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 377 transitions, 5974 flow [2024-06-21 18:54:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:49,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:49,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:49,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:54:49,371 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:49,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 642793182, now seen corresponding path program 2 times [2024-06-21 18:54:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:49,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345301460] [2024-06-21 18:54:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345301460] [2024-06-21 18:54:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345301460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:50,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:54:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596426827] [2024-06-21 18:54:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:50,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:54:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:54:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:54:50,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:54:50,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 377 transitions, 5974 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:50,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:50,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:54:50,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:52,306 INFO L124 PetriNetUnfolderBase]: 3792/6007 cut-off events. [2024-06-21 18:54:52,307 INFO L125 PetriNetUnfolderBase]: For 700143/700143 co-relation queries the response was YES. [2024-06-21 18:54:52,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59070 conditions, 6007 events. 3792/6007 cut-off events. For 700143/700143 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 36139 event pairs, 833 based on Foata normal form. 2/6005 useless extension candidates. Maximal degree in co-relation 58943. Up to 5703 conditions per place. [2024-06-21 18:54:52,388 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 61 changer transitions 0/393 dead transitions. [2024-06-21 18:54:52,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 393 transitions, 7034 flow [2024-06-21 18:54:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:54:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:54:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 18:54:52,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 18:54:52,389 INFO L175 Difference]: Start difference. First operand has 270 places, 377 transitions, 5974 flow. Second operand 7 states and 125 transitions. [2024-06-21 18:54:52,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 393 transitions, 7034 flow [2024-06-21 18:54:53,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 393 transitions, 6769 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:54:53,636 INFO L231 Difference]: Finished difference. Result has 267 places, 380 transitions, 5895 flow [2024-06-21 18:54:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5709, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5895, PETRI_PLACES=267, PETRI_TRANSITIONS=380} [2024-06-21 18:54:53,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 18:54:53,637 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 380 transitions, 5895 flow [2024-06-21 18:54:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:53,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:53,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:54:53,638 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1838240502, now seen corresponding path program 3 times [2024-06-21 18:54:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64168936] [2024-06-21 18:54:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64168936] [2024-06-21 18:54:55,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64168936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:55,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:55,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:54:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898290368] [2024-06-21 18:54:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:55,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:54:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:54:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:54:55,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:54:55,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 380 transitions, 5895 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:55,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:55,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:54:55,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:56,657 INFO L124 PetriNetUnfolderBase]: 3786/5999 cut-off events. [2024-06-21 18:54:56,657 INFO L125 PetriNetUnfolderBase]: For 708722/708722 co-relation queries the response was YES. [2024-06-21 18:54:56,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58783 conditions, 5999 events. 3786/5999 cut-off events. For 708722/708722 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 36092 event pairs, 833 based on Foata normal form. 2/5997 useless extension candidates. Maximal degree in co-relation 58654. Up to 5698 conditions per place. [2024-06-21 18:54:56,735 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 58 changer transitions 0/393 dead transitions. [2024-06-21 18:54:56,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 393 transitions, 6901 flow [2024-06-21 18:54:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:54:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:54:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 18:54:56,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:54:56,736 INFO L175 Difference]: Start difference. First operand has 267 places, 380 transitions, 5895 flow. Second operand 7 states and 126 transitions. [2024-06-21 18:54:56,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 393 transitions, 6901 flow [2024-06-21 18:54:57,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 393 transitions, 6734 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 18:54:57,720 INFO L231 Difference]: Finished difference. Result has 271 places, 380 transitions, 5852 flow [2024-06-21 18:54:57,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5728, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5852, PETRI_PLACES=271, PETRI_TRANSITIONS=380} [2024-06-21 18:54:57,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 18:54:57,721 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 380 transitions, 5852 flow [2024-06-21 18:54:57,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:57,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:57,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:54:57,721 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:54:57,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1664664922, now seen corresponding path program 16 times [2024-06-21 18:54:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:57,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638752341] [2024-06-21 18:54:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638752341] [2024-06-21 18:55:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638752341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:00,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843363276] [2024-06-21 18:55:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:00,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:00,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:00,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 380 transitions, 5852 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:00,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:00,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:00,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:01,850 INFO L124 PetriNetUnfolderBase]: 3779/6061 cut-off events. [2024-06-21 18:55:01,850 INFO L125 PetriNetUnfolderBase]: For 761722/761722 co-relation queries the response was YES. [2024-06-21 18:55:02,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59814 conditions, 6061 events. 3779/6061 cut-off events. For 761722/761722 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37445 event pairs, 860 based on Foata normal form. 16/6075 useless extension candidates. Maximal degree in co-relation 59682. Up to 5458 conditions per place. [2024-06-21 18:55:02,058 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 319 selfloop transitions, 89 changer transitions 0/418 dead transitions. [2024-06-21 18:55:02,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 418 transitions, 6942 flow [2024-06-21 18:55:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:55:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:55:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:55:02,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 18:55:02,060 INFO L175 Difference]: Start difference. First operand has 271 places, 380 transitions, 5852 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:55:02,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 418 transitions, 6942 flow [2024-06-21 18:55:03,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 418 transitions, 6857 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:55:03,173 INFO L231 Difference]: Finished difference. Result has 278 places, 382 transitions, 6067 flow [2024-06-21 18:55:03,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6067, PETRI_PLACES=278, PETRI_TRANSITIONS=382} [2024-06-21 18:55:03,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 18:55:03,175 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 382 transitions, 6067 flow [2024-06-21 18:55:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:03,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:03,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:03,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:55:03,176 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:03,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -810675708, now seen corresponding path program 17 times [2024-06-21 18:55:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:03,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237090031] [2024-06-21 18:55:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:03,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237090031] [2024-06-21 18:55:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237090031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:05,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:05,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:05,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002594970] [2024-06-21 18:55:05,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:05,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:05,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:05,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:05,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 382 transitions, 6067 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:05,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:05,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:05,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:07,324 INFO L124 PetriNetUnfolderBase]: 3827/6143 cut-off events. [2024-06-21 18:55:07,324 INFO L125 PetriNetUnfolderBase]: For 757711/757713 co-relation queries the response was YES. [2024-06-21 18:55:07,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60242 conditions, 6143 events. 3827/6143 cut-off events. For 757711/757713 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 38122 event pairs, 820 based on Foata normal form. 18/6159 useless extension candidates. Maximal degree in co-relation 60108. Up to 5562 conditions per place. [2024-06-21 18:55:07,406 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 347 selfloop transitions, 67 changer transitions 0/424 dead transitions. [2024-06-21 18:55:07,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 424 transitions, 7186 flow [2024-06-21 18:55:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:55:07,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 18:55:07,408 INFO L175 Difference]: Start difference. First operand has 278 places, 382 transitions, 6067 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:55:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 424 transitions, 7186 flow [2024-06-21 18:55:08,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 424 transitions, 6941 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 18:55:08,713 INFO L231 Difference]: Finished difference. Result has 281 places, 384 transitions, 6078 flow [2024-06-21 18:55:08,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6078, PETRI_PLACES=281, PETRI_TRANSITIONS=384} [2024-06-21 18:55:08,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 18:55:08,713 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 384 transitions, 6078 flow [2024-06-21 18:55:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:08,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:08,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:55:08,714 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:08,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash -243374754, now seen corresponding path program 18 times [2024-06-21 18:55:08,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:08,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900314559] [2024-06-21 18:55:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:08,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:11,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:11,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900314559] [2024-06-21 18:55:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900314559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:11,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:11,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106563852] [2024-06-21 18:55:11,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:11,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:11,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:11,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 384 transitions, 6078 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:11,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:11,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:11,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:12,937 INFO L124 PetriNetUnfolderBase]: 3923/6300 cut-off events. [2024-06-21 18:55:12,937 INFO L125 PetriNetUnfolderBase]: For 780575/780575 co-relation queries the response was YES. [2024-06-21 18:55:12,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61701 conditions, 6300 events. 3923/6300 cut-off events. For 780575/780575 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 39384 event pairs, 842 based on Foata normal form. 16/6314 useless extension candidates. Maximal degree in co-relation 61566. Up to 5681 conditions per place. [2024-06-21 18:55:13,016 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 315 selfloop transitions, 101 changer transitions 0/426 dead transitions. [2024-06-21 18:55:13,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 426 transitions, 7222 flow [2024-06-21 18:55:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:55:13,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 18:55:13,017 INFO L175 Difference]: Start difference. First operand has 281 places, 384 transitions, 6078 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:55:13,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 426 transitions, 7222 flow [2024-06-21 18:55:14,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 426 transitions, 7079 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:14,290 INFO L231 Difference]: Finished difference. Result has 283 places, 386 transitions, 6275 flow [2024-06-21 18:55:14,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6275, PETRI_PLACES=283, PETRI_TRANSITIONS=386} [2024-06-21 18:55:14,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 18:55:14,291 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 386 transitions, 6275 flow [2024-06-21 18:55:14,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:14,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:14,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:14,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:55:14,292 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:14,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash -248737134, now seen corresponding path program 19 times [2024-06-21 18:55:14,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:14,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918834365] [2024-06-21 18:55:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918834365] [2024-06-21 18:55:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918834365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:16,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993719811] [2024-06-21 18:55:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:16,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:16,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 386 transitions, 6275 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:16,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:16,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:16,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:18,678 INFO L124 PetriNetUnfolderBase]: 4019/6460 cut-off events. [2024-06-21 18:55:18,678 INFO L125 PetriNetUnfolderBase]: For 814291/814291 co-relation queries the response was YES. [2024-06-21 18:55:18,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63789 conditions, 6460 events. 4019/6460 cut-off events. For 814291/814291 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 40733 event pairs, 858 based on Foata normal form. 16/6474 useless extension candidates. Maximal degree in co-relation 63653. Up to 5841 conditions per place. [2024-06-21 18:55:18,766 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 322 selfloop transitions, 96 changer transitions 0/428 dead transitions. [2024-06-21 18:55:18,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 428 transitions, 7425 flow [2024-06-21 18:55:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:55:18,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:55:18,768 INFO L175 Difference]: Start difference. First operand has 283 places, 386 transitions, 6275 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:55:18,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 428 transitions, 7425 flow [2024-06-21 18:55:20,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 428 transitions, 7185 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:20,041 INFO L231 Difference]: Finished difference. Result has 285 places, 388 transitions, 6367 flow [2024-06-21 18:55:20,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6367, PETRI_PLACES=285, PETRI_TRANSITIONS=388} [2024-06-21 18:55:20,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 18:55:20,042 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 388 transitions, 6367 flow [2024-06-21 18:55:20,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:20,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:20,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:20,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:55:20,043 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:20,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash -243172944, now seen corresponding path program 20 times [2024-06-21 18:55:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:20,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185514183] [2024-06-21 18:55:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:21,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:21,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185514183] [2024-06-21 18:55:21,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185514183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:21,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:21,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:21,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750411671] [2024-06-21 18:55:21,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:21,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:21,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:21,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:22,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:22,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 388 transitions, 6367 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:22,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:22,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:22,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:24,116 INFO L124 PetriNetUnfolderBase]: 4090/6591 cut-off events. [2024-06-21 18:55:24,116 INFO L125 PetriNetUnfolderBase]: For 827655/827655 co-relation queries the response was YES. [2024-06-21 18:55:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64767 conditions, 6591 events. 4090/6591 cut-off events. For 827655/827655 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41898 event pairs, 877 based on Foata normal form. 16/6605 useless extension candidates. Maximal degree in co-relation 64630. Up to 5887 conditions per place. [2024-06-21 18:55:24,191 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 288 selfloop transitions, 132 changer transitions 0/430 dead transitions. [2024-06-21 18:55:24,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 430 transitions, 7523 flow [2024-06-21 18:55:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:55:24,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:55:24,192 INFO L175 Difference]: Start difference. First operand has 285 places, 388 transitions, 6367 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:55:24,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 430 transitions, 7523 flow [2024-06-21 18:55:25,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 430 transitions, 7291 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:25,464 INFO L231 Difference]: Finished difference. Result has 287 places, 390 transitions, 6541 flow [2024-06-21 18:55:25,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6541, PETRI_PLACES=287, PETRI_TRANSITIONS=390} [2024-06-21 18:55:25,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 18:55:25,465 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 390 transitions, 6541 flow [2024-06-21 18:55:25,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:25,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:55:25,466 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:25,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash -243165504, now seen corresponding path program 21 times [2024-06-21 18:55:25,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:25,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829141670] [2024-06-21 18:55:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829141670] [2024-06-21 18:55:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829141670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:27,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:27,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508960240] [2024-06-21 18:55:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:27,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:27,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:27,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:27,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 390 transitions, 6541 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:27,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:27,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:27,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:29,240 INFO L124 PetriNetUnfolderBase]: 4097/6610 cut-off events. [2024-06-21 18:55:29,241 INFO L125 PetriNetUnfolderBase]: For 800347/800347 co-relation queries the response was YES. [2024-06-21 18:55:29,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63985 conditions, 6610 events. 4097/6610 cut-off events. For 800347/800347 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 41892 event pairs, 848 based on Foata normal form. 12/6620 useless extension candidates. Maximal degree in co-relation 63847. Up to 5136 conditions per place. [2024-06-21 18:55:29,327 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 279 selfloop transitions, 145 changer transitions 0/434 dead transitions. [2024-06-21 18:55:29,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 434 transitions, 7649 flow [2024-06-21 18:55:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 18:55:29,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-21 18:55:29,329 INFO L175 Difference]: Start difference. First operand has 287 places, 390 transitions, 6541 flow. Second operand 11 states and 211 transitions. [2024-06-21 18:55:29,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 434 transitions, 7649 flow [2024-06-21 18:55:31,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 434 transitions, 7323 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:31,237 INFO L231 Difference]: Finished difference. Result has 289 places, 391 transitions, 6549 flow [2024-06-21 18:55:31,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6215, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6549, PETRI_PLACES=289, PETRI_TRANSITIONS=391} [2024-06-21 18:55:31,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 18:55:31,238 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 391 transitions, 6549 flow [2024-06-21 18:55:31,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:31,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:31,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:31,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:55:31,238 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:31,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1182775104, now seen corresponding path program 4 times [2024-06-21 18:55:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:31,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895957296] [2024-06-21 18:55:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:32,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:32,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895957296] [2024-06-21 18:55:32,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895957296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:32,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:32,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576374027] [2024-06-21 18:55:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:32,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:32,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:32,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:55:32,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 391 transitions, 6549 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:32,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:32,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:55:32,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:34,173 INFO L124 PetriNetUnfolderBase]: 4204/6719 cut-off events. [2024-06-21 18:55:34,173 INFO L125 PetriNetUnfolderBase]: For 777245/777245 co-relation queries the response was YES. [2024-06-21 18:55:34,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64536 conditions, 6719 events. 4204/6719 cut-off events. For 777245/777245 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42268 event pairs, 911 based on Foata normal form. 2/6719 useless extension candidates. Maximal degree in co-relation 64397. Up to 6397 conditions per place. [2024-06-21 18:55:34,263 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 62 changer transitions 0/415 dead transitions. [2024-06-21 18:55:34,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 415 transitions, 7520 flow [2024-06-21 18:55:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:55:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:55:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 18:55:34,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 18:55:34,264 INFO L175 Difference]: Start difference. First operand has 289 places, 391 transitions, 6549 flow. Second operand 8 states and 145 transitions. [2024-06-21 18:55:34,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 415 transitions, 7520 flow [2024-06-21 18:55:36,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 415 transitions, 6863 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-21 18:55:36,386 INFO L231 Difference]: Finished difference. Result has 285 places, 394 transitions, 6059 flow [2024-06-21 18:55:36,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6059, PETRI_PLACES=285, PETRI_TRANSITIONS=394} [2024-06-21 18:55:36,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 18:55:36,386 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 394 transitions, 6059 flow [2024-06-21 18:55:36,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:36,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:36,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:36,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:55:36,387 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:36,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1328347360, now seen corresponding path program 1 times [2024-06-21 18:55:36,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:36,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49356043] [2024-06-21 18:55:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:36,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49356043] [2024-06-21 18:55:37,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49356043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:37,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:37,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:37,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999939386] [2024-06-21 18:55:37,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:37,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:37,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:37,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:55:37,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 394 transitions, 6059 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:37,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:37,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:55:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:39,327 INFO L124 PetriNetUnfolderBase]: 3902/6400 cut-off events. [2024-06-21 18:55:39,327 INFO L125 PetriNetUnfolderBase]: For 685036/685036 co-relation queries the response was YES. [2024-06-21 18:55:39,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58536 conditions, 6400 events. 3902/6400 cut-off events. For 685036/685036 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41642 event pairs, 1307 based on Foata normal form. 1/6399 useless extension candidates. Maximal degree in co-relation 58398. Up to 6028 conditions per place. [2024-06-21 18:55:39,407 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 16 changer transitions 0/412 dead transitions. [2024-06-21 18:55:39,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 412 transitions, 6961 flow [2024-06-21 18:55:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:55:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:55:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 18:55:39,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 18:55:39,408 INFO L175 Difference]: Start difference. First operand has 285 places, 394 transitions, 6059 flow. Second operand 7 states and 133 transitions. [2024-06-21 18:55:39,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 412 transitions, 6961 flow [2024-06-21 18:55:40,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 412 transitions, 6858 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 18:55:40,910 INFO L231 Difference]: Finished difference. Result has 287 places, 397 transitions, 6052 flow [2024-06-21 18:55:40,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6052, PETRI_PLACES=287, PETRI_TRANSITIONS=397} [2024-06-21 18:55:40,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 18:55:40,911 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 397 transitions, 6052 flow [2024-06-21 18:55:40,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:40,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:40,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:40,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:55:40,912 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:40,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 608643160, now seen corresponding path program 2 times [2024-06-21 18:55:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535747144] [2024-06-21 18:55:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:42,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:42,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535747144] [2024-06-21 18:55:42,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535747144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:42,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:42,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864248553] [2024-06-21 18:55:42,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:42,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:42,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:42,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:55:42,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 397 transitions, 6052 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:42,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:42,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:55:42,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:43,467 INFO L124 PetriNetUnfolderBase]: 3907/6407 cut-off events. [2024-06-21 18:55:43,467 INFO L125 PetriNetUnfolderBase]: For 697835/697835 co-relation queries the response was YES. [2024-06-21 18:55:43,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58892 conditions, 6407 events. 3907/6407 cut-off events. For 697835/697835 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41693 event pairs, 1308 based on Foata normal form. 1/6406 useless extension candidates. Maximal degree in co-relation 58753. Up to 6019 conditions per place. [2024-06-21 18:55:43,559 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 28 changer transitions 0/416 dead transitions. [2024-06-21 18:55:43,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 416 transitions, 7174 flow [2024-06-21 18:55:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:55:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:55:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 18:55:43,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 18:55:43,561 INFO L175 Difference]: Start difference. First operand has 287 places, 397 transitions, 6052 flow. Second operand 7 states and 135 transitions. [2024-06-21 18:55:43,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 416 transitions, 7174 flow [2024-06-21 18:55:45,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 416 transitions, 7100 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:55:45,106 INFO L231 Difference]: Finished difference. Result has 289 places, 403 transitions, 6162 flow [2024-06-21 18:55:45,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5978, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6162, PETRI_PLACES=289, PETRI_TRANSITIONS=403} [2024-06-21 18:55:45,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 18:55:45,107 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 403 transitions, 6162 flow [2024-06-21 18:55:45,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:45,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:45,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:45,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:55:45,108 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:45,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1328467516, now seen corresponding path program 1 times [2024-06-21 18:55:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:45,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458564608] [2024-06-21 18:55:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:46,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:46,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458564608] [2024-06-21 18:55:46,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458564608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:46,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:46,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:46,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359001852] [2024-06-21 18:55:46,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:46,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:46,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:46,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:46,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 403 transitions, 6162 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:46,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:46,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:46,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:47,834 INFO L124 PetriNetUnfolderBase]: 4015/6517 cut-off events. [2024-06-21 18:55:47,835 INFO L125 PetriNetUnfolderBase]: For 713569/713569 co-relation queries the response was YES. [2024-06-21 18:55:47,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60087 conditions, 6517 events. 4015/6517 cut-off events. For 713569/713569 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41881 event pairs, 1345 based on Foata normal form. 1/6516 useless extension candidates. Maximal degree in co-relation 59947. Up to 6237 conditions per place. [2024-06-21 18:55:47,925 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 25 changer transitions 0/422 dead transitions. [2024-06-21 18:55:47,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 422 transitions, 7268 flow [2024-06-21 18:55:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:55:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:55:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 18:55:47,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 18:55:47,927 INFO L175 Difference]: Start difference. First operand has 289 places, 403 transitions, 6162 flow. Second operand 7 states and 129 transitions. [2024-06-21 18:55:47,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 422 transitions, 7268 flow [2024-06-21 18:55:49,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 422 transitions, 7193 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 18:55:49,602 INFO L231 Difference]: Finished difference. Result has 293 places, 409 transitions, 6221 flow [2024-06-21 18:55:49,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6087, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6221, PETRI_PLACES=293, PETRI_TRANSITIONS=409} [2024-06-21 18:55:49,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 18:55:49,602 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 409 transitions, 6221 flow [2024-06-21 18:55:49,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:49,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:49,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:49,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:55:49,603 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:49,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1637283474, now seen corresponding path program 2 times [2024-06-21 18:55:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234878549] [2024-06-21 18:55:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234878549] [2024-06-21 18:55:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234878549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:50,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859484145] [2024-06-21 18:55:50,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:50,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:50,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 409 transitions, 6221 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:50,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:50,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:50,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:52,334 INFO L124 PetriNetUnfolderBase]: 4020/6524 cut-off events. [2024-06-21 18:55:52,335 INFO L125 PetriNetUnfolderBase]: For 728786/728786 co-relation queries the response was YES. [2024-06-21 18:55:52,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60669 conditions, 6524 events. 4020/6524 cut-off events. For 728786/728786 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41915 event pairs, 1343 based on Foata normal form. 1/6523 useless extension candidates. Maximal degree in co-relation 60527. Up to 6258 conditions per place. [2024-06-21 18:55:52,435 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 396 selfloop transitions, 21 changer transitions 0/422 dead transitions. [2024-06-21 18:55:52,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 422 transitions, 7287 flow [2024-06-21 18:55:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:55:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:55:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:55:52,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 18:55:52,436 INFO L175 Difference]: Start difference. First operand has 293 places, 409 transitions, 6221 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:55:52,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 422 transitions, 7287 flow [2024-06-21 18:55:53,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 422 transitions, 7232 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 18:55:53,947 INFO L231 Difference]: Finished difference. Result has 298 places, 412 transitions, 6256 flow [2024-06-21 18:55:53,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6170, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6256, PETRI_PLACES=298, PETRI_TRANSITIONS=412} [2024-06-21 18:55:53,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 18:55:53,948 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 412 transitions, 6256 flow [2024-06-21 18:55:53,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:53,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:53,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:53,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:55:53,949 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:53,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash 642561798, now seen corresponding path program 3 times [2024-06-21 18:55:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:53,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048734980] [2024-06-21 18:55:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048734980] [2024-06-21 18:55:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048734980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:55,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421613802] [2024-06-21 18:55:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:55:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 412 transitions, 6256 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:55:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:56,614 INFO L124 PetriNetUnfolderBase]: 3924/6427 cut-off events. [2024-06-21 18:55:56,614 INFO L125 PetriNetUnfolderBase]: For 739780/739780 co-relation queries the response was YES. [2024-06-21 18:55:56,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60042 conditions, 6427 events. 3924/6427 cut-off events. For 739780/739780 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41787 event pairs, 1310 based on Foata normal form. 1/6426 useless extension candidates. Maximal degree in co-relation 59898. Up to 6063 conditions per place. [2024-06-21 18:55:56,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 16 changer transitions 0/421 dead transitions. [2024-06-21 18:55:56,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 7094 flow [2024-06-21 18:55:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:55:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:55:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 18:55:56,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 18:55:56,705 INFO L175 Difference]: Start difference. First operand has 298 places, 412 transitions, 6256 flow. Second operand 7 states and 127 transitions. [2024-06-21 18:55:56,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 7094 flow [2024-06-21 18:55:58,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 421 transitions, 6986 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 18:55:58,022 INFO L231 Difference]: Finished difference. Result has 299 places, 412 transitions, 6186 flow [2024-06-21 18:55:58,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6148, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6186, PETRI_PLACES=299, PETRI_TRANSITIONS=412} [2024-06-21 18:55:58,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 18:55:58,025 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 412 transitions, 6186 flow [2024-06-21 18:55:58,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:58,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:58,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:58,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:55:58,025 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:55:58,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash 642799134, now seen corresponding path program 3 times [2024-06-21 18:55:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:58,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999097330] [2024-06-21 18:55:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:58,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:59,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999097330] [2024-06-21 18:55:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999097330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:59,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:59,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:55:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052459743] [2024-06-21 18:55:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:59,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:55:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:55:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:55:59,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:55:59,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 412 transitions, 6186 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:59,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:59,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:55:59,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:00,545 INFO L124 PetriNetUnfolderBase]: 4014/6516 cut-off events. [2024-06-21 18:56:00,546 INFO L125 PetriNetUnfolderBase]: For 750225/750225 co-relation queries the response was YES. [2024-06-21 18:56:00,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60737 conditions, 6516 events. 4014/6516 cut-off events. For 750225/750225 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41789 event pairs, 1343 based on Foata normal form. 1/6515 useless extension candidates. Maximal degree in co-relation 60592. Up to 6257 conditions per place. [2024-06-21 18:56:00,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 16 changer transitions 0/421 dead transitions. [2024-06-21 18:56:00,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 421 transitions, 7044 flow [2024-06-21 18:56:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:56:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:56:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 18:56:00,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 18:56:00,641 INFO L175 Difference]: Start difference. First operand has 299 places, 412 transitions, 6186 flow. Second operand 7 states and 121 transitions. [2024-06-21 18:56:00,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 421 transitions, 7044 flow [2024-06-21 18:56:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 421 transitions, 6974 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:56:02,790 INFO L231 Difference]: Finished difference. Result has 300 places, 412 transitions, 6154 flow [2024-06-21 18:56:02,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6154, PETRI_PLACES=300, PETRI_TRANSITIONS=412} [2024-06-21 18:56:02,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 18:56:02,791 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 412 transitions, 6154 flow [2024-06-21 18:56:02,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:02,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:02,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:02,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:56:02,791 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:02,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1121489873, now seen corresponding path program 1 times [2024-06-21 18:56:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:02,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746046370] [2024-06-21 18:56:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:02,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:04,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:04,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746046370] [2024-06-21 18:56:04,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746046370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:04,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:04,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641726716] [2024-06-21 18:56:04,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:04,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:04,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:04,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:04,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:05,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:05,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 412 transitions, 6154 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:05,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:05,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:05,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:06,927 INFO L124 PetriNetUnfolderBase]: 4173/6723 cut-off events. [2024-06-21 18:56:06,927 INFO L125 PetriNetUnfolderBase]: For 918520/918520 co-relation queries the response was YES. [2024-06-21 18:56:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65149 conditions, 6723 events. 4173/6723 cut-off events. For 918520/918520 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 42821 event pairs, 768 based on Foata normal form. 12/6731 useless extension candidates. Maximal degree in co-relation 65003. Up to 6134 conditions per place. [2024-06-21 18:56:07,040 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 67 changer transitions 0/452 dead transitions. [2024-06-21 18:56:07,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 452 transitions, 7284 flow [2024-06-21 18:56:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 18:56:07,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 18:56:07,042 INFO L175 Difference]: Start difference. First operand has 300 places, 412 transitions, 6154 flow. Second operand 11 states and 201 transitions. [2024-06-21 18:56:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 452 transitions, 7284 flow [2024-06-21 18:56:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 452 transitions, 7242 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:56:09,347 INFO L231 Difference]: Finished difference. Result has 306 places, 417 transitions, 6392 flow [2024-06-21 18:56:09,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6392, PETRI_PLACES=306, PETRI_TRANSITIONS=417} [2024-06-21 18:56:09,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 18:56:09,348 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 417 transitions, 6392 flow [2024-06-21 18:56:09,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:09,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:09,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:56:09,349 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:09,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1116905903, now seen corresponding path program 2 times [2024-06-21 18:56:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430688173] [2024-06-21 18:56:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:11,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430688173] [2024-06-21 18:56:11,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430688173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:11,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:11,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147375628] [2024-06-21 18:56:11,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:11,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:11,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:11,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 417 transitions, 6392 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:11,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:11,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:11,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:13,479 INFO L124 PetriNetUnfolderBase]: 4214/6796 cut-off events. [2024-06-21 18:56:13,479 INFO L125 PetriNetUnfolderBase]: For 938046/938046 co-relation queries the response was YES. [2024-06-21 18:56:13,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66640 conditions, 6796 events. 4214/6796 cut-off events. For 938046/938046 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 43457 event pairs, 855 based on Foata normal form. 12/6804 useless extension candidates. Maximal degree in co-relation 66492. Up to 6292 conditions per place. [2024-06-21 18:56:13,570 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 378 selfloop transitions, 60 changer transitions 0/452 dead transitions. [2024-06-21 18:56:13,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 452 transitions, 7484 flow [2024-06-21 18:56:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 18:56:13,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-21 18:56:13,572 INFO L175 Difference]: Start difference. First operand has 306 places, 417 transitions, 6392 flow. Second operand 11 states and 199 transitions. [2024-06-21 18:56:13,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 452 transitions, 7484 flow [2024-06-21 18:56:15,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 452 transitions, 7295 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 18:56:15,224 INFO L231 Difference]: Finished difference. Result has 310 places, 418 transitions, 6415 flow [2024-06-21 18:56:15,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6415, PETRI_PLACES=310, PETRI_TRANSITIONS=418} [2024-06-21 18:56:15,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 18:56:15,225 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 418 transitions, 6415 flow [2024-06-21 18:56:15,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:15,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:15,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:56:15,225 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:15,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash 427938863, now seen corresponding path program 3 times [2024-06-21 18:56:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:15,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743187175] [2024-06-21 18:56:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:15,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743187175] [2024-06-21 18:56:17,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743187175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:17,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:17,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965628921] [2024-06-21 18:56:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:17,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:17,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:17,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 418 transitions, 6415 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:17,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:17,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:17,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:19,183 INFO L124 PetriNetUnfolderBase]: 4255/6863 cut-off events. [2024-06-21 18:56:19,184 INFO L125 PetriNetUnfolderBase]: For 968090/968090 co-relation queries the response was YES. [2024-06-21 18:56:19,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67227 conditions, 6863 events. 4255/6863 cut-off events. For 968090/968090 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 43895 event pairs, 838 based on Foata normal form. 12/6871 useless extension candidates. Maximal degree in co-relation 67078. Up to 6299 conditions per place. [2024-06-21 18:56:19,278 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 393 selfloop transitions, 52 changer transitions 0/459 dead transitions. [2024-06-21 18:56:19,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 459 transitions, 7559 flow [2024-06-21 18:56:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 18:56:19,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 18:56:19,280 INFO L175 Difference]: Start difference. First operand has 310 places, 418 transitions, 6415 flow. Second operand 11 states and 200 transitions. [2024-06-21 18:56:19,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 459 transitions, 7559 flow [2024-06-21 18:56:21,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 459 transitions, 7398 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:21,509 INFO L231 Difference]: Finished difference. Result has 314 places, 423 transitions, 6495 flow [2024-06-21 18:56:21,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6495, PETRI_PLACES=314, PETRI_TRANSITIONS=423} [2024-06-21 18:56:21,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 18:56:21,510 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 423 transitions, 6495 flow [2024-06-21 18:56:21,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:21,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:21,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:21,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:56:21,515 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:21,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1991241229, now seen corresponding path program 4 times [2024-06-21 18:56:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:21,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879836876] [2024-06-21 18:56:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:23,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879836876] [2024-06-21 18:56:23,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879836876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:23,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270254089] [2024-06-21 18:56:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:23,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:23,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 423 transitions, 6495 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:23,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:23,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:23,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:25,747 INFO L124 PetriNetUnfolderBase]: 4324/6976 cut-off events. [2024-06-21 18:56:25,747 INFO L125 PetriNetUnfolderBase]: For 990959/990959 co-relation queries the response was YES. [2024-06-21 18:56:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68325 conditions, 6976 events. 4324/6976 cut-off events. For 990959/990959 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44742 event pairs, 862 based on Foata normal form. 12/6984 useless extension candidates. Maximal degree in co-relation 68174. Up to 6424 conditions per place. [2024-06-21 18:56:25,839 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 367 selfloop transitions, 81 changer transitions 0/462 dead transitions. [2024-06-21 18:56:25,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 462 transitions, 7637 flow [2024-06-21 18:56:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 18:56:25,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2024-06-21 18:56:25,841 INFO L175 Difference]: Start difference. First operand has 314 places, 423 transitions, 6495 flow. Second operand 11 states and 202 transitions. [2024-06-21 18:56:25,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 462 transitions, 7637 flow [2024-06-21 18:56:27,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 462 transitions, 7473 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:27,668 INFO L231 Difference]: Finished difference. Result has 318 places, 428 transitions, 6626 flow [2024-06-21 18:56:27,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6626, PETRI_PLACES=318, PETRI_TRANSITIONS=428} [2024-06-21 18:56:27,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 18:56:27,669 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 428 transitions, 6626 flow [2024-06-21 18:56:27,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:27,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:27,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:56:27,670 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:27,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1995825199, now seen corresponding path program 5 times [2024-06-21 18:56:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436089234] [2024-06-21 18:56:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436089234] [2024-06-21 18:56:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436089234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:29,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:29,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:29,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895513442] [2024-06-21 18:56:29,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:29,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:29,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:30,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:30,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 428 transitions, 6626 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:30,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:30,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:30,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:31,996 INFO L124 PetriNetUnfolderBase]: 4393/7091 cut-off events. [2024-06-21 18:56:31,997 INFO L125 PetriNetUnfolderBase]: For 1014025/1014025 co-relation queries the response was YES. [2024-06-21 18:56:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69255 conditions, 7091 events. 4393/7091 cut-off events. For 1014025/1014025 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 45661 event pairs, 859 based on Foata normal form. 12/7099 useless extension candidates. Maximal degree in co-relation 69102. Up to 6447 conditions per place. [2024-06-21 18:56:32,104 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 367 selfloop transitions, 88 changer transitions 0/469 dead transitions. [2024-06-21 18:56:32,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 469 transitions, 7808 flow [2024-06-21 18:56:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 18:56:32,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 18:56:32,106 INFO L175 Difference]: Start difference. First operand has 318 places, 428 transitions, 6626 flow. Second operand 11 states and 203 transitions. [2024-06-21 18:56:32,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 469 transitions, 7808 flow [2024-06-21 18:56:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 469 transitions, 7597 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:34,032 INFO L231 Difference]: Finished difference. Result has 322 places, 434 transitions, 6751 flow [2024-06-21 18:56:34,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6415, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6751, PETRI_PLACES=322, PETRI_TRANSITIONS=434} [2024-06-21 18:56:34,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 18:56:34,033 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 434 transitions, 6751 flow [2024-06-21 18:56:34,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:34,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:34,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:34,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:56:34,034 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:34,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1825007449, now seen corresponding path program 6 times [2024-06-21 18:56:34,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:34,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882835556] [2024-06-21 18:56:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:34,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:36,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:36,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882835556] [2024-06-21 18:56:36,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882835556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:36,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:36,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416004574] [2024-06-21 18:56:36,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:36,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:36,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:36,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:36,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:36,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 434 transitions, 6751 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:36,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:36,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:36,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:38,377 INFO L124 PetriNetUnfolderBase]: 4434/7162 cut-off events. [2024-06-21 18:56:38,377 INFO L125 PetriNetUnfolderBase]: For 1037266/1037266 co-relation queries the response was YES. [2024-06-21 18:56:38,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70272 conditions, 7162 events. 4434/7162 cut-off events. For 1037266/1037266 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46213 event pairs, 892 based on Foata normal form. 12/7170 useless extension candidates. Maximal degree in co-relation 70117. Up to 6610 conditions per place. [2024-06-21 18:56:38,473 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 84 changer transitions 0/471 dead transitions. [2024-06-21 18:56:38,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 471 transitions, 7913 flow [2024-06-21 18:56:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 18:56:38,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 18:56:38,474 INFO L175 Difference]: Start difference. First operand has 322 places, 434 transitions, 6751 flow. Second operand 11 states and 201 transitions. [2024-06-21 18:56:38,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 471 transitions, 7913 flow [2024-06-21 18:56:40,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 471 transitions, 7658 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:40,686 INFO L231 Difference]: Finished difference. Result has 326 places, 437 transitions, 6795 flow [2024-06-21 18:56:40,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6500, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6795, PETRI_PLACES=326, PETRI_TRANSITIONS=437} [2024-06-21 18:56:40,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 18:56:40,687 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 437 transitions, 6795 flow [2024-06-21 18:56:40,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:40,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:40,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:40,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:56:40,688 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:40,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1320237659, now seen corresponding path program 1 times [2024-06-21 18:56:40,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:40,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924378318] [2024-06-21 18:56:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:41,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924378318] [2024-06-21 18:56:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924378318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:41,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:56:41,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60224679] [2024-06-21 18:56:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:41,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:56:41,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:56:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:56:41,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:41,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 437 transitions, 6795 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:41,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:41,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:41,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:43,562 INFO L124 PetriNetUnfolderBase]: 4447/7183 cut-off events. [2024-06-21 18:56:43,562 INFO L125 PetriNetUnfolderBase]: For 1019932/1019934 co-relation queries the response was YES. [2024-06-21 18:56:43,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70279 conditions, 7183 events. 4447/7183 cut-off events. For 1019932/1019934 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 46450 event pairs, 1052 based on Foata normal form. 3/7183 useless extension candidates. Maximal degree in co-relation 70122. Up to 6837 conditions per place. [2024-06-21 18:56:43,665 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 38 changer transitions 0/469 dead transitions. [2024-06-21 18:56:43,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 469 transitions, 8166 flow [2024-06-21 18:56:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:56:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:56:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 18:56:43,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 18:56:43,666 INFO L175 Difference]: Start difference. First operand has 326 places, 437 transitions, 6795 flow. Second operand 7 states and 134 transitions. [2024-06-21 18:56:43,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 469 transitions, 8166 flow [2024-06-21 18:56:45,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 469 transitions, 7937 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:45,565 INFO L231 Difference]: Finished difference. Result has 327 places, 453 transitions, 6929 flow [2024-06-21 18:56:45,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6566, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6929, PETRI_PLACES=327, PETRI_TRANSITIONS=453} [2024-06-21 18:56:45,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 18:56:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 453 transitions, 6929 flow [2024-06-21 18:56:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:45,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:45,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:56:45,592 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:45,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1320387389, now seen corresponding path program 2 times [2024-06-21 18:56:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:45,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386416673] [2024-06-21 18:56:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:45,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:46,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386416673] [2024-06-21 18:56:46,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386416673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:46,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:46,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:56:46,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080551652] [2024-06-21 18:56:46,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:46,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:56:46,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:56:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:56:46,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:46,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 453 transitions, 6929 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:46,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:48,422 INFO L124 PetriNetUnfolderBase]: 4452/7190 cut-off events. [2024-06-21 18:56:48,422 INFO L125 PetriNetUnfolderBase]: For 1030917/1030919 co-relation queries the response was YES. [2024-06-21 18:56:48,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70425 conditions, 7190 events. 4452/7190 cut-off events. For 1030917/1030919 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46497 event pairs, 1051 based on Foata normal form. 3/7190 useless extension candidates. Maximal degree in co-relation 70264. Up to 6866 conditions per place. [2024-06-21 18:56:48,524 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 32 changer transitions 0/469 dead transitions. [2024-06-21 18:56:48,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 469 transitions, 7952 flow [2024-06-21 18:56:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:56:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:56:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 18:56:48,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 18:56:48,525 INFO L175 Difference]: Start difference. First operand has 327 places, 453 transitions, 6929 flow. Second operand 7 states and 129 transitions. [2024-06-21 18:56:48,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 469 transitions, 7952 flow [2024-06-21 18:56:50,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 469 transitions, 7840 flow, removed 54 selfloop flow, removed 1 redundant places. [2024-06-21 18:56:50,401 INFO L231 Difference]: Finished difference. Result has 333 places, 457 transitions, 6971 flow [2024-06-21 18:56:50,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6845, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6971, PETRI_PLACES=333, PETRI_TRANSITIONS=457} [2024-06-21 18:56:50,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 18:56:50,402 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 457 transitions, 6971 flow [2024-06-21 18:56:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:50,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:50,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:56:50,403 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:50,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1698432955, now seen corresponding path program 1 times [2024-06-21 18:56:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:50,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567593211] [2024-06-21 18:56:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:51,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567593211] [2024-06-21 18:56:51,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567593211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:51,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:51,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:56:51,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274708020] [2024-06-21 18:56:51,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:56:51,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:56:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:56:52,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:56:52,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 457 transitions, 6971 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:52,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:52,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:56:52,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:54,283 INFO L124 PetriNetUnfolderBase]: 4564/7311 cut-off events. [2024-06-21 18:56:54,284 INFO L125 PetriNetUnfolderBase]: For 1062734/1062734 co-relation queries the response was YES. [2024-06-21 18:56:54,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71749 conditions, 7311 events. 4564/7311 cut-off events. For 1062734/1062734 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46741 event pairs, 940 based on Foata normal form. 2/7309 useless extension candidates. Maximal degree in co-relation 71585. Up to 6949 conditions per place. [2024-06-21 18:56:54,375 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 71 changer transitions 0/487 dead transitions. [2024-06-21 18:56:54,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 487 transitions, 8627 flow [2024-06-21 18:56:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:56:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:56:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:56:54,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 18:56:54,377 INFO L175 Difference]: Start difference. First operand has 333 places, 457 transitions, 6971 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:56:54,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 487 transitions, 8627 flow [2024-06-21 18:56:56,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 487 transitions, 8542 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:56:56,885 INFO L231 Difference]: Finished difference. Result has 338 places, 468 transitions, 7265 flow [2024-06-21 18:56:56,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6886, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7265, PETRI_PLACES=338, PETRI_TRANSITIONS=468} [2024-06-21 18:56:56,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 18:56:56,886 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 468 transitions, 7265 flow [2024-06-21 18:56:56,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:56,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:56,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:56,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:56:56,887 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:56:56,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1115294025, now seen corresponding path program 7 times [2024-06-21 18:56:56,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:56,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392263300] [2024-06-21 18:56:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:56,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392263300] [2024-06-21 18:56:59,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392263300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:59,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:59,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195458433] [2024-06-21 18:56:59,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:59,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:56:59,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 468 transitions, 7265 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:59,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:59,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:56:59,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:01,445 INFO L124 PetriNetUnfolderBase]: 4528/7316 cut-off events. [2024-06-21 18:57:01,445 INFO L125 PetriNetUnfolderBase]: For 1131468/1131484 co-relation queries the response was YES. [2024-06-21 18:57:01,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72874 conditions, 7316 events. 4528/7316 cut-off events. For 1131468/1131484 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 47397 event pairs, 911 based on Foata normal form. 12/7318 useless extension candidates. Maximal degree in co-relation 72707. Up to 6605 conditions per place. [2024-06-21 18:57:01,554 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 134 changer transitions 0/505 dead transitions. [2024-06-21 18:57:01,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 505 transitions, 8485 flow [2024-06-21 18:57:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 18:57:01,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 18:57:01,556 INFO L175 Difference]: Start difference. First operand has 338 places, 468 transitions, 7265 flow. Second operand 11 states and 201 transitions. [2024-06-21 18:57:01,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 505 transitions, 8485 flow [2024-06-21 18:57:04,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 505 transitions, 8382 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 18:57:04,331 INFO L231 Difference]: Finished difference. Result has 346 places, 471 transitions, 7545 flow [2024-06-21 18:57:04,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7545, PETRI_PLACES=346, PETRI_TRANSITIONS=471} [2024-06-21 18:57:04,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 18:57:04,332 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 471 transitions, 7545 flow [2024-06-21 18:57:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:04,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:04,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:04,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:57:04,333 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:04,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash 267837939, now seen corresponding path program 8 times [2024-06-21 18:57:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403748271] [2024-06-21 18:57:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:04,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:06,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403748271] [2024-06-21 18:57:06,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403748271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:06,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:06,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:06,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073735252] [2024-06-21 18:57:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:06,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:06,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:06,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 471 transitions, 7545 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:06,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:06,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:06,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:08,782 INFO L124 PetriNetUnfolderBase]: 4586/7414 cut-off events. [2024-06-21 18:57:08,783 INFO L125 PetriNetUnfolderBase]: For 1165394/1165410 co-relation queries the response was YES. [2024-06-21 18:57:08,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74473 conditions, 7414 events. 4586/7414 cut-off events. For 1165394/1165410 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 48192 event pairs, 926 based on Foata normal form. 12/7416 useless extension candidates. Maximal degree in co-relation 74303. Up to 6703 conditions per place. [2024-06-21 18:57:08,899 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 123 changer transitions 0/508 dead transitions. [2024-06-21 18:57:08,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 508 transitions, 8777 flow [2024-06-21 18:57:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 18:57:08,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2024-06-21 18:57:08,900 INFO L175 Difference]: Start difference. First operand has 346 places, 471 transitions, 7545 flow. Second operand 11 states and 202 transitions. [2024-06-21 18:57:08,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 508 transitions, 8777 flow [2024-06-21 18:57:12,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 508 transitions, 8450 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:12,559 INFO L231 Difference]: Finished difference. Result has 350 places, 474 transitions, 7585 flow [2024-06-21 18:57:12,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7585, PETRI_PLACES=350, PETRI_TRANSITIONS=474} [2024-06-21 18:57:12,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 18:57:12,560 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 474 transitions, 7585 flow [2024-06-21 18:57:12,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:12,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:12,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:12,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:57:12,561 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:12,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash 434071719, now seen corresponding path program 9 times [2024-06-21 18:57:12,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:12,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225111598] [2024-06-21 18:57:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:14,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:14,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225111598] [2024-06-21 18:57:14,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225111598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:14,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:14,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:14,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559959931] [2024-06-21 18:57:14,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:14,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:14,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:15,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:15,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 474 transitions, 7585 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:15,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:15,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:17,286 INFO L124 PetriNetUnfolderBase]: 4644/7512 cut-off events. [2024-06-21 18:57:17,287 INFO L125 PetriNetUnfolderBase]: For 1189911/1189927 co-relation queries the response was YES. [2024-06-21 18:57:17,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75300 conditions, 7512 events. 4644/7512 cut-off events. For 1189911/1189927 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48979 event pairs, 946 based on Foata normal form. 12/7514 useless extension candidates. Maximal degree in co-relation 75128. Up to 6801 conditions per place. [2024-06-21 18:57:17,391 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 122 changer transitions 0/511 dead transitions. [2024-06-21 18:57:17,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 511 transitions, 8829 flow [2024-06-21 18:57:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 18:57:17,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 18:57:17,392 INFO L175 Difference]: Start difference. First operand has 350 places, 474 transitions, 7585 flow. Second operand 11 states and 203 transitions. [2024-06-21 18:57:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 511 transitions, 8829 flow [2024-06-21 18:57:20,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 511 transitions, 8518 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:20,448 INFO L231 Difference]: Finished difference. Result has 354 places, 477 transitions, 7645 flow [2024-06-21 18:57:20,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7645, PETRI_PLACES=354, PETRI_TRANSITIONS=477} [2024-06-21 18:57:20,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-21 18:57:20,448 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 477 transitions, 7645 flow [2024-06-21 18:57:20,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:20,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:20,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:57:20,449 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:20,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash 263253969, now seen corresponding path program 10 times [2024-06-21 18:57:20,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:20,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847402003] [2024-06-21 18:57:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:23,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847402003] [2024-06-21 18:57:23,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847402003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:23,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362090269] [2024-06-21 18:57:23,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:23,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:23,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:23,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:23,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 477 transitions, 7645 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:23,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:23,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:23,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:25,656 INFO L124 PetriNetUnfolderBase]: 4685/7583 cut-off events. [2024-06-21 18:57:25,656 INFO L125 PetriNetUnfolderBase]: For 1214184/1214200 co-relation queries the response was YES. [2024-06-21 18:57:25,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76049 conditions, 7583 events. 4685/7583 cut-off events. For 1214184/1214200 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 49618 event pairs, 941 based on Foata normal form. 12/7585 useless extension candidates. Maximal degree in co-relation 75875. Up to 6795 conditions per place. [2024-06-21 18:57:25,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 130 changer transitions 0/515 dead transitions. [2024-06-21 18:57:25,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 515 transitions, 8913 flow [2024-06-21 18:57:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 18:57:25,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 18:57:25,774 INFO L175 Difference]: Start difference. First operand has 354 places, 477 transitions, 7645 flow. Second operand 11 states and 203 transitions. [2024-06-21 18:57:25,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 515 transitions, 8913 flow [2024-06-21 18:57:28,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 515 transitions, 8598 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:28,546 INFO L231 Difference]: Finished difference. Result has 358 places, 480 transitions, 7738 flow [2024-06-21 18:57:28,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7738, PETRI_PLACES=358, PETRI_TRANSITIONS=480} [2024-06-21 18:57:28,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 18:57:28,546 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 480 transitions, 7738 flow [2024-06-21 18:57:28,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:28,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:28,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:28,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:57:28,547 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:28,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1778619813, now seen corresponding path program 3 times [2024-06-21 18:57:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:28,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246668105] [2024-06-21 18:57:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:28,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246668105] [2024-06-21 18:57:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246668105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:29,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:57:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794042553] [2024-06-21 18:57:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:29,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:57:29,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:57:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:57:29,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:29,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 480 transitions, 7738 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:29,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:29,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:29,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:31,608 INFO L124 PetriNetUnfolderBase]: 4698/7604 cut-off events. [2024-06-21 18:57:31,609 INFO L125 PetriNetUnfolderBase]: For 1190514/1190534 co-relation queries the response was YES. [2024-06-21 18:57:31,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76375 conditions, 7604 events. 4698/7604 cut-off events. For 1190514/1190534 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49810 event pairs, 1122 based on Foata normal form. 5/7600 useless extension candidates. Maximal degree in co-relation 76199. Up to 7206 conditions per place. [2024-06-21 18:57:31,735 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 60 changer transitions 0/506 dead transitions. [2024-06-21 18:57:31,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 506 transitions, 9332 flow [2024-06-21 18:57:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:57:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:57:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 18:57:31,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 18:57:31,736 INFO L175 Difference]: Start difference. First operand has 358 places, 480 transitions, 7738 flow. Second operand 7 states and 135 transitions. [2024-06-21 18:57:31,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 506 transitions, 9332 flow [2024-06-21 18:57:35,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 506 transitions, 8978 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:35,178 INFO L231 Difference]: Finished difference. Result has 357 places, 489 transitions, 7684 flow [2024-06-21 18:57:35,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7384, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7684, PETRI_PLACES=357, PETRI_TRANSITIONS=489} [2024-06-21 18:57:35,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 18:57:35,179 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 489 transitions, 7684 flow [2024-06-21 18:57:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:35,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:35,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:35,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:57:35,179 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:35,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1778291523, now seen corresponding path program 4 times [2024-06-21 18:57:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842430140] [2024-06-21 18:57:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:35,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:36,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:36,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842430140] [2024-06-21 18:57:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842430140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:36,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:36,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:57:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245988128] [2024-06-21 18:57:36,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:57:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:57:36,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:57:36,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:36,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 489 transitions, 7684 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:36,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:36,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:36,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:38,233 INFO L124 PetriNetUnfolderBase]: 4711/7622 cut-off events. [2024-06-21 18:57:38,234 INFO L125 PetriNetUnfolderBase]: For 1206500/1206520 co-relation queries the response was YES. [2024-06-21 18:57:38,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76353 conditions, 7622 events. 4711/7622 cut-off events. For 1206500/1206520 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 49950 event pairs, 1122 based on Foata normal form. 5/7618 useless extension candidates. Maximal degree in co-relation 76176. Up to 7221 conditions per place. [2024-06-21 18:57:38,367 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 68 changer transitions 0/509 dead transitions. [2024-06-21 18:57:38,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 509 transitions, 9232 flow [2024-06-21 18:57:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:57:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:57:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:57:38,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 18:57:38,370 INFO L175 Difference]: Start difference. First operand has 357 places, 489 transitions, 7684 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:57:38,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 509 transitions, 9232 flow [2024-06-21 18:57:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 509 transitions, 9072 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-21 18:57:42,158 INFO L231 Difference]: Finished difference. Result has 363 places, 495 transitions, 7790 flow [2024-06-21 18:57:42,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7562, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7790, PETRI_PLACES=363, PETRI_TRANSITIONS=495} [2024-06-21 18:57:42,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 18:57:42,159 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 495 transitions, 7790 flow [2024-06-21 18:57:42,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:42,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:42,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:57:42,159 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:42,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1559589507, now seen corresponding path program 5 times [2024-06-21 18:57:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:42,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20389755] [2024-06-21 18:57:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:43,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:43,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20389755] [2024-06-21 18:57:43,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20389755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:43,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:43,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:57:43,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191586102] [2024-06-21 18:57:43,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:43,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:57:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:57:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:57:43,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:43,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 495 transitions, 7790 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:43,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:43,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:43,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:45,313 INFO L124 PetriNetUnfolderBase]: 4708/7618 cut-off events. [2024-06-21 18:57:45,313 INFO L125 PetriNetUnfolderBase]: For 1219044/1219064 co-relation queries the response was YES. [2024-06-21 18:57:45,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76164 conditions, 7618 events. 4708/7618 cut-off events. For 1219044/1219064 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49876 event pairs, 1117 based on Foata normal form. 5/7614 useless extension candidates. Maximal degree in co-relation 75985. Up to 7277 conditions per place. [2024-06-21 18:57:45,429 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 447 selfloop transitions, 44 changer transitions 0/505 dead transitions. [2024-06-21 18:57:45,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 505 transitions, 8998 flow [2024-06-21 18:57:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:57:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:57:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 18:57:45,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:57:45,431 INFO L175 Difference]: Start difference. First operand has 363 places, 495 transitions, 7790 flow. Second operand 7 states and 126 transitions. [2024-06-21 18:57:45,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 505 transitions, 8998 flow [2024-06-21 18:57:48,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 505 transitions, 8894 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 18:57:48,245 INFO L231 Difference]: Finished difference. Result has 367 places, 495 transitions, 7780 flow [2024-06-21 18:57:48,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7686, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7780, PETRI_PLACES=367, PETRI_TRANSITIONS=495} [2024-06-21 18:57:48,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 18:57:48,246 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 495 transitions, 7780 flow [2024-06-21 18:57:48,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:48,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:48,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:57:48,246 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:48,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -576796069, now seen corresponding path program 6 times [2024-06-21 18:57:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:48,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528243968] [2024-06-21 18:57:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:48,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:49,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528243968] [2024-06-21 18:57:49,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528243968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:49,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:49,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:57:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77260838] [2024-06-21 18:57:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:49,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:57:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:57:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:57:49,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:57:49,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 495 transitions, 7780 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:49,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:49,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:57:49,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:51,350 INFO L124 PetriNetUnfolderBase]: 4705/7614 cut-off events. [2024-06-21 18:57:51,350 INFO L125 PetriNetUnfolderBase]: For 1235047/1235067 co-relation queries the response was YES. [2024-06-21 18:57:51,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76163 conditions, 7614 events. 4705/7614 cut-off events. For 1235047/1235067 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49869 event pairs, 1117 based on Foata normal form. 5/7610 useless extension candidates. Maximal degree in co-relation 75983. Up to 7289 conditions per place. [2024-06-21 18:57:51,479 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 33 changer transitions 0/504 dead transitions. [2024-06-21 18:57:51,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 504 transitions, 8786 flow [2024-06-21 18:57:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:57:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:57:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:57:51,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 18:57:51,481 INFO L175 Difference]: Start difference. First operand has 367 places, 495 transitions, 7780 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:57:51,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 504 transitions, 8786 flow [2024-06-21 18:57:54,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 504 transitions, 8655 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 18:57:54,715 INFO L231 Difference]: Finished difference. Result has 371 places, 495 transitions, 7721 flow [2024-06-21 18:57:54,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7649, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7721, PETRI_PLACES=371, PETRI_TRANSITIONS=495} [2024-06-21 18:57:54,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 18:57:54,716 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 495 transitions, 7721 flow [2024-06-21 18:57:54,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:54,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:54,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:54,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:57:54,716 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:57:54,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1641446205, now seen corresponding path program 2 times [2024-06-21 18:57:54,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:54,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901219884] [2024-06-21 18:57:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:54,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:56,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901219884] [2024-06-21 18:57:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901219884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:56,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:56,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:57:56,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489033135] [2024-06-21 18:57:56,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:56,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:57:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:57:56,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:57:56,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:57:56,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 495 transitions, 7721 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:56,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:56,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:57:56,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:58,594 INFO L124 PetriNetUnfolderBase]: 4809/7718 cut-off events. [2024-06-21 18:57:58,594 INFO L125 PetriNetUnfolderBase]: For 1261335/1261335 co-relation queries the response was YES. [2024-06-21 18:57:58,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77143 conditions, 7718 events. 4809/7718 cut-off events. For 1261335/1261335 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49881 event pairs, 1004 based on Foata normal form. 2/7715 useless extension candidates. Maximal degree in co-relation 76961. Up to 7352 conditions per place. [2024-06-21 18:57:58,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 435 selfloop transitions, 75 changer transitions 0/514 dead transitions. [2024-06-21 18:57:58,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 514 transitions, 9323 flow [2024-06-21 18:57:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:57:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:57:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 18:57:58,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 18:57:58,916 INFO L175 Difference]: Start difference. First operand has 371 places, 495 transitions, 7721 flow. Second operand 8 states and 143 transitions. [2024-06-21 18:57:58,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 514 transitions, 9323 flow [2024-06-21 18:58:01,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 514 transitions, 9181 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:58:01,722 INFO L231 Difference]: Finished difference. Result has 371 places, 498 transitions, 7795 flow [2024-06-21 18:58:01,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7579, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7795, PETRI_PLACES=371, PETRI_TRANSITIONS=498} [2024-06-21 18:58:01,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 18:58:01,723 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 498 transitions, 7795 flow [2024-06-21 18:58:01,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:01,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:01,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:58:01,723 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:01,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash -563901123, now seen corresponding path program 3 times [2024-06-21 18:58:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651367377] [2024-06-21 18:58:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:03,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:03,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651367377] [2024-06-21 18:58:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651367377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:03,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:03,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747690345] [2024-06-21 18:58:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:03,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:03,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:03,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:03,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 498 transitions, 7795 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:03,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:03,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:03,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:05,595 INFO L124 PetriNetUnfolderBase]: 4819/7736 cut-off events. [2024-06-21 18:58:05,596 INFO L125 PetriNetUnfolderBase]: For 1282467/1282467 co-relation queries the response was YES. [2024-06-21 18:58:05,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 7736 events. 4819/7736 cut-off events. For 1282467/1282467 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 50013 event pairs, 1004 based on Foata normal form. 2/7733 useless extension candidates. Maximal degree in co-relation 77397. Up to 7362 conditions per place. [2024-06-21 18:58:05,716 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 84 changer transitions 0/516 dead transitions. [2024-06-21 18:58:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 516 transitions, 9389 flow [2024-06-21 18:58:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:58:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 18:58:05,717 INFO L175 Difference]: Start difference. First operand has 371 places, 498 transitions, 7795 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:58:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 516 transitions, 9389 flow [2024-06-21 18:58:09,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 516 transitions, 9195 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 18:58:09,368 INFO L231 Difference]: Finished difference. Result has 373 places, 501 transitions, 7841 flow [2024-06-21 18:58:09,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7841, PETRI_PLACES=373, PETRI_TRANSITIONS=501} [2024-06-21 18:58:09,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 18:58:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 501 transitions, 7841 flow [2024-06-21 18:58:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:09,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:58:09,369 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:09,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash -563455653, now seen corresponding path program 4 times [2024-06-21 18:58:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681417883] [2024-06-21 18:58:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:10,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:10,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681417883] [2024-06-21 18:58:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681417883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:10,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:10,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329922673] [2024-06-21 18:58:10,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:10,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:10,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:11,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:11,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 501 transitions, 7841 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:11,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:11,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:11,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:13,192 INFO L124 PetriNetUnfolderBase]: 4813/7728 cut-off events. [2024-06-21 18:58:13,193 INFO L125 PetriNetUnfolderBase]: For 1292367/1292367 co-relation queries the response was YES. [2024-06-21 18:58:13,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77486 conditions, 7728 events. 4813/7728 cut-off events. For 1292367/1292367 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 49972 event pairs, 1001 based on Foata normal form. 2/7725 useless extension candidates. Maximal degree in co-relation 77301. Up to 7357 conditions per place. [2024-06-21 18:58:13,314 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 88 changer transitions 0/515 dead transitions. [2024-06-21 18:58:13,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 515 transitions, 9165 flow [2024-06-21 18:58:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:58:13,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 18:58:13,316 INFO L175 Difference]: Start difference. First operand has 373 places, 501 transitions, 7841 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:58:13,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 515 transitions, 9165 flow [2024-06-21 18:58:17,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 515 transitions, 8943 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 18:58:17,110 INFO L231 Difference]: Finished difference. Result has 377 places, 501 transitions, 7803 flow [2024-06-21 18:58:17,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7619, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7803, PETRI_PLACES=377, PETRI_TRANSITIONS=501} [2024-06-21 18:58:17,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 18:58:17,111 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 501 transitions, 7803 flow [2024-06-21 18:58:17,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:17,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:17,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:17,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:58:17,111 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:17,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:17,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1479656347, now seen corresponding path program 11 times [2024-06-21 18:58:17,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:17,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922014215] [2024-06-21 18:58:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:17,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922014215] [2024-06-21 18:58:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922014215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:19,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:19,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822756003] [2024-06-21 18:58:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:19,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:19,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:19,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 501 transitions, 7803 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:19,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:19,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:19,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:21,519 INFO L124 PetriNetUnfolderBase]: 4785/7753 cut-off events. [2024-06-21 18:58:21,519 INFO L125 PetriNetUnfolderBase]: For 1364628/1364638 co-relation queries the response was YES. [2024-06-21 18:58:21,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78076 conditions, 7753 events. 4785/7753 cut-off events. For 1364628/1364638 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 51060 event pairs, 1111 based on Foata normal form. 14/7757 useless extension candidates. Maximal degree in co-relation 77888. Up to 7184 conditions per place. [2024-06-21 18:58:21,646 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 485 selfloop transitions, 52 changer transitions 0/551 dead transitions. [2024-06-21 18:58:21,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 551 transitions, 9210 flow [2024-06-21 18:58:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:58:21,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 18:58:21,648 INFO L175 Difference]: Start difference. First operand has 377 places, 501 transitions, 7803 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:58:21,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 551 transitions, 9210 flow [2024-06-21 18:58:23,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 551 transitions, 9066 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 18:58:23,827 INFO L231 Difference]: Finished difference. Result has 385 places, 506 transitions, 7948 flow [2024-06-21 18:58:23,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7948, PETRI_PLACES=385, PETRI_TRANSITIONS=506} [2024-06-21 18:58:23,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-21 18:58:23,828 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 506 transitions, 7948 flow [2024-06-21 18:58:23,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:23,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:23,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:23,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:58:23,828 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:23,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1023185923, now seen corresponding path program 12 times [2024-06-21 18:58:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:23,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834885112] [2024-06-21 18:58:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834885112] [2024-06-21 18:58:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834885112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:26,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:26,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574969937] [2024-06-21 18:58:26,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:26,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:26,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 506 transitions, 7948 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:26,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:26,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:26,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:28,774 INFO L124 PetriNetUnfolderBase]: 4853/7877 cut-off events. [2024-06-21 18:58:28,774 INFO L125 PetriNetUnfolderBase]: For 1404191/1404197 co-relation queries the response was YES. [2024-06-21 18:58:28,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79731 conditions, 7877 events. 4853/7877 cut-off events. For 1404191/1404197 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 52180 event pairs, 1183 based on Foata normal form. 14/7885 useless extension candidates. Maximal degree in co-relation 79540. Up to 7338 conditions per place. [2024-06-21 18:58:28,893 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 474 selfloop transitions, 62 changer transitions 0/550 dead transitions. [2024-06-21 18:58:28,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 550 transitions, 9314 flow [2024-06-21 18:58:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 18:58:28,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-21 18:58:28,895 INFO L175 Difference]: Start difference. First operand has 385 places, 506 transitions, 7948 flow. Second operand 11 states and 206 transitions. [2024-06-21 18:58:28,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 550 transitions, 9314 flow [2024-06-21 18:58:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 550 transitions, 9161 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 18:58:31,165 INFO L231 Difference]: Finished difference. Result has 390 places, 508 transitions, 8063 flow [2024-06-21 18:58:31,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8063, PETRI_PLACES=390, PETRI_TRANSITIONS=508} [2024-06-21 18:58:31,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 18:58:31,166 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 508 transitions, 8063 flow [2024-06-21 18:58:31,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:31,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:31,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:31,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:58:31,166 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:31,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash -386944423, now seen corresponding path program 13 times [2024-06-21 18:58:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200736782] [2024-06-21 18:58:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:33,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200736782] [2024-06-21 18:58:33,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200736782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:33,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208149590] [2024-06-21 18:58:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:33,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:33,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 508 transitions, 8063 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:33,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:33,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:33,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:35,875 INFO L124 PetriNetUnfolderBase]: 4955/8033 cut-off events. [2024-06-21 18:58:35,875 INFO L125 PetriNetUnfolderBase]: For 1431327/1431331 co-relation queries the response was YES. [2024-06-21 18:58:35,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81263 conditions, 8033 events. 4955/8033 cut-off events. For 1431327/1431331 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 53238 event pairs, 1044 based on Foata normal form. 12/8039 useless extension candidates. Maximal degree in co-relation 81071. Up to 7277 conditions per place. [2024-06-21 18:58:36,009 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 448 selfloop transitions, 96 changer transitions 0/558 dead transitions. [2024-06-21 18:58:36,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 558 transitions, 9570 flow [2024-06-21 18:58:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:58:36,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 18:58:36,011 INFO L175 Difference]: Start difference. First operand has 390 places, 508 transitions, 8063 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:58:36,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 558 transitions, 9570 flow [2024-06-21 18:58:40,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 558 transitions, 9331 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:40,797 INFO L231 Difference]: Finished difference. Result has 393 places, 516 transitions, 8333 flow [2024-06-21 18:58:40,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7824, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8333, PETRI_PLACES=393, PETRI_TRANSITIONS=516} [2024-06-21 18:58:40,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 18:58:40,798 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 516 transitions, 8333 flow [2024-06-21 18:58:40,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:40,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:40,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:58:40,799 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:40,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1487478147, now seen corresponding path program 14 times [2024-06-21 18:58:40,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:40,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373966740] [2024-06-21 18:58:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:42,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:42,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373966740] [2024-06-21 18:58:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373966740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:42,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:42,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:58:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648843450] [2024-06-21 18:58:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:58:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:58:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:58:42,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 18:58:42,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 516 transitions, 8333 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:42,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:42,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 18:58:42,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:44,733 INFO L124 PetriNetUnfolderBase]: 4050/7158 cut-off events. [2024-06-21 18:58:44,733 INFO L125 PetriNetUnfolderBase]: For 1458886/1458979 co-relation queries the response was YES. [2024-06-21 18:58:44,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75517 conditions, 7158 events. 4050/7158 cut-off events. For 1458886/1458979 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 52576 event pairs, 628 based on Foata normal form. 61/7056 useless extension candidates. Maximal degree in co-relation 75323. Up to 5038 conditions per place. [2024-06-21 18:58:44,837 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 122 changer transitions 0/567 dead transitions. [2024-06-21 18:58:44,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 567 transitions, 9857 flow [2024-06-21 18:58:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:58:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:58:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 18:58:44,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-21 18:58:44,838 INFO L175 Difference]: Start difference. First operand has 393 places, 516 transitions, 8333 flow. Second operand 9 states and 194 transitions. [2024-06-21 18:58:44,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 567 transitions, 9857 flow [2024-06-21 18:58:49,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 567 transitions, 9391 flow, removed 136 selfloop flow, removed 7 redundant places. [2024-06-21 18:58:49,849 INFO L231 Difference]: Finished difference. Result has 398 places, 535 transitions, 8792 flow [2024-06-21 18:58:49,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7959, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8792, PETRI_PLACES=398, PETRI_TRANSITIONS=535} [2024-06-21 18:58:49,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 18:58:49,850 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 535 transitions, 8792 flow [2024-06-21 18:58:49,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:49,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:49,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:49,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:58:49,850 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:49,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1732476355, now seen corresponding path program 15 times [2024-06-21 18:58:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56601153] [2024-06-21 18:58:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56601153] [2024-06-21 18:58:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56601153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679127741] [2024-06-21 18:58:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:51,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:52,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:52,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 535 transitions, 8792 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:52,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:52,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:52,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:54,552 INFO L124 PetriNetUnfolderBase]: 5398/8768 cut-off events. [2024-06-21 18:58:54,552 INFO L125 PetriNetUnfolderBase]: For 1516222/1516228 co-relation queries the response was YES. [2024-06-21 18:58:54,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88922 conditions, 8768 events. 5398/8768 cut-off events. For 1516222/1516228 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 59067 event pairs, 1169 based on Foata normal form. 14/8776 useless extension candidates. Maximal degree in co-relation 88724. Up to 8055 conditions per place. [2024-06-21 18:58:54,698 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 519 selfloop transitions, 65 changer transitions 0/598 dead transitions. [2024-06-21 18:58:54,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 598 transitions, 10784 flow [2024-06-21 18:58:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:58:54,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 18:58:54,700 INFO L175 Difference]: Start difference. First operand has 398 places, 535 transitions, 8792 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:58:54,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 598 transitions, 10784 flow [2024-06-21 18:59:00,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 598 transitions, 10575 flow, removed 101 selfloop flow, removed 2 redundant places. [2024-06-21 18:59:00,583 INFO L231 Difference]: Finished difference. Result has 410 places, 556 transitions, 9478 flow [2024-06-21 18:59:00,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8685, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9478, PETRI_PLACES=410, PETRI_TRANSITIONS=556} [2024-06-21 18:59:00,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 18:59:00,584 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 556 transitions, 9478 flow [2024-06-21 18:59:00,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:00,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:00,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:00,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:59:00,584 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:00,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1008117415, now seen corresponding path program 16 times [2024-06-21 18:59:00,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:00,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559976108] [2024-06-21 18:59:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:00,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:03,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:03,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559976108] [2024-06-21 18:59:03,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559976108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:03,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:03,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:03,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429202671] [2024-06-21 18:59:03,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:59:03,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 556 transitions, 9478 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:03,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:03,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:59:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:05,910 INFO L124 PetriNetUnfolderBase]: 5504/8948 cut-off events. [2024-06-21 18:59:05,910 INFO L125 PetriNetUnfolderBase]: For 1513067/1513073 co-relation queries the response was YES. [2024-06-21 18:59:06,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89733 conditions, 8948 events. 5504/8948 cut-off events. For 1513067/1513073 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 60564 event pairs, 1277 based on Foata normal form. 14/8956 useless extension candidates. Maximal degree in co-relation 89530. Up to 8369 conditions per place. [2024-06-21 18:59:06,067 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 523 selfloop transitions, 64 changer transitions 0/601 dead transitions. [2024-06-21 18:59:06,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 601 transitions, 11008 flow [2024-06-21 18:59:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 18:59:06,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-21 18:59:06,069 INFO L175 Difference]: Start difference. First operand has 410 places, 556 transitions, 9478 flow. Second operand 11 states and 206 transitions. [2024-06-21 18:59:06,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 601 transitions, 11008 flow [2024-06-21 18:59:10,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 601 transitions, 10672 flow, removed 127 selfloop flow, removed 6 redundant places. [2024-06-21 18:59:10,188 INFO L231 Difference]: Finished difference. Result has 416 places, 561 transitions, 9513 flow [2024-06-21 18:59:10,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9142, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9513, PETRI_PLACES=416, PETRI_TRANSITIONS=561} [2024-06-21 18:59:10,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 18:59:10,189 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 561 transitions, 9513 flow [2024-06-21 18:59:10,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:10,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:10,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:59:10,189 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:10,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:10,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1045133829, now seen corresponding path program 17 times [2024-06-21 18:59:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:10,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870676075] [2024-06-21 18:59:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:12,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:12,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870676075] [2024-06-21 18:59:12,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870676075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:12,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:12,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829967121] [2024-06-21 18:59:12,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:12,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:12,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:59:12,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 561 transitions, 9513 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:12,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:12,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:59:12,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:15,088 INFO L124 PetriNetUnfolderBase]: 5589/9085 cut-off events. [2024-06-21 18:59:15,088 INFO L125 PetriNetUnfolderBase]: For 1535241/1535245 co-relation queries the response was YES. [2024-06-21 18:59:15,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90814 conditions, 9085 events. 5589/9085 cut-off events. For 1535241/1535245 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 61649 event pairs, 1278 based on Foata normal form. 12/9091 useless extension candidates. Maximal degree in co-relation 90608. Up to 8463 conditions per place. [2024-06-21 18:59:15,248 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 492 selfloop transitions, 99 changer transitions 0/605 dead transitions. [2024-06-21 18:59:15,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 605 transitions, 11047 flow [2024-06-21 18:59:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 18:59:15,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 18:59:15,256 INFO L175 Difference]: Start difference. First operand has 416 places, 561 transitions, 9513 flow. Second operand 11 states and 207 transitions. [2024-06-21 18:59:15,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 605 transitions, 11047 flow [2024-06-21 18:59:20,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 605 transitions, 10803 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-21 18:59:20,249 INFO L231 Difference]: Finished difference. Result has 419 places, 565 transitions, 9699 flow [2024-06-21 18:59:20,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9269, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9699, PETRI_PLACES=419, PETRI_TRANSITIONS=565} [2024-06-21 18:59:20,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-21 18:59:20,250 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 565 transitions, 9699 flow [2024-06-21 18:59:20,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:20,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:20,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:20,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:59:20,251 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:20,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash -398502309, now seen corresponding path program 18 times [2024-06-21 18:59:20,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:20,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237041389] [2024-06-21 18:59:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:20,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:22,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237041389] [2024-06-21 18:59:22,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237041389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:22,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:22,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:22,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619568320] [2024-06-21 18:59:22,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:22,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:22,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:22,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:22,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:22,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:59:22,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 565 transitions, 9699 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:22,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:22,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:59:22,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:25,896 INFO L124 PetriNetUnfolderBase]: 5674/9228 cut-off events. [2024-06-21 18:59:25,897 INFO L125 PetriNetUnfolderBase]: For 1564298/1564302 co-relation queries the response was YES. [2024-06-21 18:59:26,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92302 conditions, 9228 events. 5674/9228 cut-off events. For 1564298/1564302 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 62758 event pairs, 1307 based on Foata normal form. 12/9234 useless extension candidates. Maximal degree in co-relation 92094. Up to 8606 conditions per place. [2024-06-21 18:59:26,043 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 501 selfloop transitions, 94 changer transitions 0/609 dead transitions. [2024-06-21 18:59:26,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 609 transitions, 11247 flow [2024-06-21 18:59:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:59:26,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 18:59:26,045 INFO L175 Difference]: Start difference. First operand has 419 places, 565 transitions, 9699 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:59:26,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 609 transitions, 11247 flow [2024-06-21 18:59:31,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 609 transitions, 10921 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 18:59:31,030 INFO L231 Difference]: Finished difference. Result has 423 places, 569 transitions, 9799 flow [2024-06-21 18:59:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9799, PETRI_PLACES=423, PETRI_TRANSITIONS=569} [2024-06-21 18:59:31,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 18:59:31,031 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 569 transitions, 9799 flow [2024-06-21 18:59:31,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:31,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:31,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:31,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:59:31,033 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:31,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 874316079, now seen corresponding path program 19 times [2024-06-21 18:59:31,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:31,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120673745] [2024-06-21 18:59:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:31,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:33,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120673745] [2024-06-21 18:59:33,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120673745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:33,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:59:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015047833] [2024-06-21 18:59:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:59:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:59:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:59:33,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:59:33,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 569 transitions, 9799 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:33,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:33,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:59:33,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:36,368 INFO L124 PetriNetUnfolderBase]: 5681/9241 cut-off events. [2024-06-21 18:59:36,368 INFO L125 PetriNetUnfolderBase]: For 1525429/1525433 co-relation queries the response was YES. [2024-06-21 18:59:36,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90674 conditions, 9241 events. 5681/9241 cut-off events. For 1525429/1525433 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62939 event pairs, 1278 based on Foata normal form. 12/9247 useless extension candidates. Maximal degree in co-relation 90464. Up to 8527 conditions per place. [2024-06-21 18:59:36,530 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 495 selfloop transitions, 104 changer transitions 0/613 dead transitions. [2024-06-21 18:59:36,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 613 transitions, 11076 flow [2024-06-21 18:59:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:59:36,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 18:59:36,532 INFO L175 Difference]: Start difference. First operand has 423 places, 569 transitions, 9799 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:59:36,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 613 transitions, 11076 flow [2024-06-21 18:59:41,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 613 transitions, 10754 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-21 18:59:41,744 INFO L231 Difference]: Finished difference. Result has 426 places, 572 transitions, 9650 flow [2024-06-21 18:59:41,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9309, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9650, PETRI_PLACES=426, PETRI_TRANSITIONS=572} [2024-06-21 18:59:41,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 18:59:41,745 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 572 transitions, 9650 flow [2024-06-21 18:59:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:41,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:41,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:59:41,746 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:41,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1040966043, now seen corresponding path program 7 times [2024-06-21 18:59:41,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633460417] [2024-06-21 18:59:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:42,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:42,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633460417] [2024-06-21 18:59:42,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633460417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:42,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:42,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:42,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138397589] [2024-06-21 18:59:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:42,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:42,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:42,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:59:42,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 572 transitions, 9650 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:42,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:42,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:59:42,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:45,637 INFO L124 PetriNetUnfolderBase]: 5688/9257 cut-off events. [2024-06-21 18:59:45,637 INFO L125 PetriNetUnfolderBase]: For 1481077/1481083 co-relation queries the response was YES. [2024-06-21 18:59:45,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90409 conditions, 9257 events. 5688/9257 cut-off events. For 1481077/1481083 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 63193 event pairs, 1637 based on Foata normal form. 3/9254 useless extension candidates. Maximal degree in co-relation 90197. Up to 8899 conditions per place. [2024-06-21 18:59:45,788 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 540 selfloop transitions, 47 changer transitions 0/601 dead transitions. [2024-06-21 18:59:45,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 601 transitions, 11167 flow [2024-06-21 18:59:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:59:45,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 18:59:45,789 INFO L175 Difference]: Start difference. First operand has 426 places, 572 transitions, 9650 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:59:45,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 601 transitions, 11167 flow [2024-06-21 18:59:50,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 601 transitions, 10620 flow, removed 110 selfloop flow, removed 9 redundant places. [2024-06-21 18:59:50,465 INFO L231 Difference]: Finished difference. Result has 426 places, 579 transitions, 9290 flow [2024-06-21 18:59:50,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9103, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9290, PETRI_PLACES=426, PETRI_TRANSITIONS=579} [2024-06-21 18:59:50,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 18:59:50,465 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 579 transitions, 9290 flow [2024-06-21 18:59:50,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:50,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:50,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:50,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:59:50,466 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:50,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:50,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2019951933, now seen corresponding path program 8 times [2024-06-21 18:59:50,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:50,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358217106] [2024-06-21 18:59:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:50,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:51,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:51,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358217106] [2024-06-21 18:59:51,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358217106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:51,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:51,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:51,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448445224] [2024-06-21 18:59:51,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:51,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:51,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:51,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:51,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:59:51,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 579 transitions, 9290 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:51,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:51,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:59:51,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:54,073 INFO L124 PetriNetUnfolderBase]: 5685/9253 cut-off events. [2024-06-21 18:59:54,074 INFO L125 PetriNetUnfolderBase]: For 1476521/1476531 co-relation queries the response was YES. [2024-06-21 18:59:54,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89130 conditions, 9253 events. 5685/9253 cut-off events. For 1476521/1476531 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63218 event pairs, 1635 based on Foata normal form. 3/9246 useless extension candidates. Maximal degree in co-relation 88917. Up to 8916 conditions per place. [2024-06-21 18:59:54,251 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 37 changer transitions 0/597 dead transitions. [2024-06-21 18:59:54,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 597 transitions, 10508 flow [2024-06-21 18:59:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 18:59:54,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 18:59:54,252 INFO L175 Difference]: Start difference. First operand has 426 places, 579 transitions, 9290 flow. Second operand 8 states and 145 transitions. [2024-06-21 18:59:54,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 597 transitions, 10508 flow [2024-06-21 18:59:58,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 597 transitions, 10368 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:59:58,921 INFO L231 Difference]: Finished difference. Result has 429 places, 579 transitions, 9234 flow [2024-06-21 18:59:58,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9150, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9234, PETRI_PLACES=429, PETRI_TRANSITIONS=579} [2024-06-21 18:59:58,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 18:59:58,921 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 579 transitions, 9234 flow [2024-06-21 18:59:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:58,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:58,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:59:58,922 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1988679319, now seen corresponding path program 5 times [2024-06-21 18:59:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:58,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482178622] [2024-06-21 18:59:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:00,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482178622] [2024-06-21 19:00:00,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482178622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:00,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:00,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:00:00,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346229524] [2024-06-21 19:00:00,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:00:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:00:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:00:00,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:00,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 579 transitions, 9234 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:00,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:00,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:03,153 INFO L124 PetriNetUnfolderBase]: 5785/9353 cut-off events. [2024-06-21 19:00:03,153 INFO L125 PetriNetUnfolderBase]: For 1491365/1491365 co-relation queries the response was YES. [2024-06-21 19:00:03,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89833 conditions, 9353 events. 5785/9353 cut-off events. For 1491365/1491365 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 63170 event pairs, 1359 based on Foata normal form. 2/9353 useless extension candidates. Maximal degree in co-relation 89619. Up to 8976 conditions per place. [2024-06-21 19:00:03,344 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 516 selfloop transitions, 85 changer transitions 0/605 dead transitions. [2024-06-21 19:00:03,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 605 transitions, 10598 flow [2024-06-21 19:00:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:00:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:00:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:00:03,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:00:03,345 INFO L175 Difference]: Start difference. First operand has 429 places, 579 transitions, 9234 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:00:03,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 605 transitions, 10598 flow [2024-06-21 19:00:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 605 transitions, 10432 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 19:00:07,186 INFO L231 Difference]: Finished difference. Result has 429 places, 583 transitions, 9290 flow [2024-06-21 19:00:07,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9074, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9290, PETRI_PLACES=429, PETRI_TRANSITIONS=583} [2024-06-21 19:00:07,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 19:00:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 583 transitions, 9290 flow [2024-06-21 19:00:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:07,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:07,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:07,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:00:07,187 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:07,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1684261189, now seen corresponding path program 1 times [2024-06-21 19:00:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719858785] [2024-06-21 19:00:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:09,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:09,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719858785] [2024-06-21 19:00:09,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719858785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:09,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:09,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:00:09,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017114287] [2024-06-21 19:00:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:09,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:00:09,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:00:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:00:09,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:00:09,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 583 transitions, 9290 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:09,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:09,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:00:09,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:11,999 INFO L124 PetriNetUnfolderBase]: 5559/9131 cut-off events. [2024-06-21 19:00:12,000 INFO L125 PetriNetUnfolderBase]: For 1333462/1333470 co-relation queries the response was YES. [2024-06-21 19:00:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85488 conditions, 9131 events. 5559/9131 cut-off events. For 1333462/1333470 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 63268 event pairs, 2231 based on Foata normal form. 1/9119 useless extension candidates. Maximal degree in co-relation 85273. Up to 8724 conditions per place. [2024-06-21 19:00:12,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 25 changer transitions 0/610 dead transitions. [2024-06-21 19:00:12,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 610 transitions, 10888 flow [2024-06-21 19:00:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:00:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:00:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 19:00:12,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 19:00:12,168 INFO L175 Difference]: Start difference. First operand has 429 places, 583 transitions, 9290 flow. Second operand 10 states and 178 transitions. [2024-06-21 19:00:12,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 610 transitions, 10888 flow [2024-06-21 19:00:18,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 610 transitions, 10768 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:18,760 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 9364 flow [2024-06-21 19:00:18,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9364, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-21 19:00:18,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 19:00:18,761 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 9364 flow [2024-06-21 19:00:18,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:18,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:18,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:18,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:00:18,761 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:18,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1770903107, now seen corresponding path program 2 times [2024-06-21 19:00:18,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:18,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991428317] [2024-06-21 19:00:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:18,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:20,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:20,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991428317] [2024-06-21 19:00:20,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991428317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:20,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:20,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:00:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636363408] [2024-06-21 19:00:20,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:00:20,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:00:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:00:20,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:00:20,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 9364 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:20,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:20,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:00:20,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:23,174 INFO L124 PetriNetUnfolderBase]: 5556/9127 cut-off events. [2024-06-21 19:00:23,174 INFO L125 PetriNetUnfolderBase]: For 1353497/1353505 co-relation queries the response was YES. [2024-06-21 19:00:23,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86063 conditions, 9127 events. 5556/9127 cut-off events. For 1353497/1353505 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63184 event pairs, 2231 based on Foata normal form. 1/9115 useless extension candidates. Maximal degree in co-relation 85846. Up to 8733 conditions per place. [2024-06-21 19:00:23,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 19 changer transitions 0/605 dead transitions. [2024-06-21 19:00:23,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 605 transitions, 10576 flow [2024-06-21 19:00:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 19:00:23,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:00:23,340 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 9364 flow. Second operand 8 states and 147 transitions. [2024-06-21 19:00:23,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 605 transitions, 10576 flow [2024-06-21 19:00:28,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 605 transitions, 10443 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 19:00:28,465 INFO L231 Difference]: Finished difference. Result has 436 places, 589 transitions, 9275 flow [2024-06-21 19:00:28,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9231, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9275, PETRI_PLACES=436, PETRI_TRANSITIONS=589} [2024-06-21 19:00:28,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-21 19:00:28,466 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 589 transitions, 9275 flow [2024-06-21 19:00:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 19:00:28,472 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:28,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1770902952, now seen corresponding path program 1 times [2024-06-21 19:00:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379091514] [2024-06-21 19:00:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:29,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379091514] [2024-06-21 19:00:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379091514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:29,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:29,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:00:29,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235866103] [2024-06-21 19:00:29,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:29,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:00:29,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:00:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:00:29,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:00:29,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 589 transitions, 9275 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:29,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:29,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:00:29,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:32,650 INFO L124 PetriNetUnfolderBase]: 5665/9242 cut-off events. [2024-06-21 19:00:32,650 INFO L125 PetriNetUnfolderBase]: For 1372685/1372685 co-relation queries the response was YES. [2024-06-21 19:00:32,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87056 conditions, 9242 events. 5665/9242 cut-off events. For 1372685/1372685 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 63462 event pairs, 2264 based on Foata normal form. 1/9234 useless extension candidates. Maximal degree in co-relation 86837. Up to 8946 conditions per place. [2024-06-21 19:00:32,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 577 selfloop transitions, 19 changer transitions 0/608 dead transitions. [2024-06-21 19:00:32,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 608 transitions, 10577 flow [2024-06-21 19:00:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:00:32,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:00:32,798 INFO L175 Difference]: Start difference. First operand has 436 places, 589 transitions, 9275 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:00:32,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 608 transitions, 10577 flow [2024-06-21 19:00:36,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 608 transitions, 10527 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:00:36,944 INFO L231 Difference]: Finished difference. Result has 437 places, 592 transitions, 9339 flow [2024-06-21 19:00:36,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9225, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9339, PETRI_PLACES=437, PETRI_TRANSITIONS=592} [2024-06-21 19:00:36,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 19:00:36,946 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 592 transitions, 9339 flow [2024-06-21 19:00:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:36,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:36,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:36,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 19:00:36,947 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:36,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1767184037, now seen corresponding path program 3 times [2024-06-21 19:00:36,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:36,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143981189] [2024-06-21 19:00:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:36,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:38,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:38,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143981189] [2024-06-21 19:00:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143981189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:38,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:38,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:00:38,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939632551] [2024-06-21 19:00:38,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:38,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:00:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:00:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:00:38,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:00:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 592 transitions, 9339 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:00:38,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:41,128 INFO L124 PetriNetUnfolderBase]: 5576/9151 cut-off events. [2024-06-21 19:00:41,129 INFO L125 PetriNetUnfolderBase]: For 1393315/1393323 co-relation queries the response was YES. [2024-06-21 19:00:41,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86896 conditions, 9151 events. 5576/9151 cut-off events. For 1393315/1393323 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63268 event pairs, 2231 based on Foata normal form. 1/9139 useless extension candidates. Maximal degree in co-relation 86676. Up to 8740 conditions per place. [2024-06-21 19:00:41,293 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 31 changer transitions 0/608 dead transitions. [2024-06-21 19:00:41,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 608 transitions, 10619 flow [2024-06-21 19:00:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:00:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:00:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:00:41,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:00:41,295 INFO L175 Difference]: Start difference. First operand has 437 places, 592 transitions, 9339 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:00:41,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 608 transitions, 10619 flow [2024-06-21 19:00:45,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 608 transitions, 10527 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 19:00:45,477 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 9395 flow [2024-06-21 19:00:45,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9247, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9395, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-21 19:00:45,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-21 19:00:45,478 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 9395 flow [2024-06-21 19:00:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:45,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:45,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:45,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 19:00:45,479 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:45,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1767183882, now seen corresponding path program 2 times [2024-06-21 19:00:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771680231] [2024-06-21 19:00:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:46,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:46,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771680231] [2024-06-21 19:00:46,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771680231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:46,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:00:46,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642672755] [2024-06-21 19:00:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:46,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:00:46,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:00:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:00:46,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:00:46,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 9395 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:46,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:46,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:00:46,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:49,461 INFO L124 PetriNetUnfolderBase]: 5683/9267 cut-off events. [2024-06-21 19:00:49,462 INFO L125 PetriNetUnfolderBase]: For 1425197/1425197 co-relation queries the response was YES. [2024-06-21 19:00:49,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88733 conditions, 9267 events. 5683/9267 cut-off events. For 1425197/1425197 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 63557 event pairs, 2266 based on Foata normal form. 1/9259 useless extension candidates. Maximal degree in co-relation 88512. Up to 8929 conditions per place. [2024-06-21 19:00:49,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 562 selfloop transitions, 45 changer transitions 0/619 dead transitions. [2024-06-21 19:00:49,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 619 transitions, 11341 flow [2024-06-21 19:00:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 19:00:49,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:00:49,623 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 9395 flow. Second operand 8 states and 147 transitions. [2024-06-21 19:00:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 619 transitions, 11341 flow [2024-06-21 19:00:54,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 619 transitions, 11215 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:00:54,957 INFO L231 Difference]: Finished difference. Result has 441 places, 604 transitions, 9587 flow [2024-06-21 19:00:54,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9269, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9587, PETRI_PLACES=441, PETRI_TRANSITIONS=604} [2024-06-21 19:00:54,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 19:00:54,958 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 604 transitions, 9587 flow [2024-06-21 19:00:54,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:54,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:54,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:54,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 19:00:54,959 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:54,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1767178302, now seen corresponding path program 3 times [2024-06-21 19:00:54,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:54,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066016416] [2024-06-21 19:00:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:54,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:56,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:56,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066016416] [2024-06-21 19:00:56,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066016416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:56,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:56,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:00:56,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903874575] [2024-06-21 19:00:56,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:56,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:00:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:00:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:00:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:56,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 604 transitions, 9587 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:56,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:56,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:56,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:59,015 INFO L124 PetriNetUnfolderBase]: 5815/9403 cut-off events. [2024-06-21 19:00:59,015 INFO L125 PetriNetUnfolderBase]: For 1639690/1639690 co-relation queries the response was YES. [2024-06-21 19:00:59,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93313 conditions, 9403 events. 5815/9403 cut-off events. For 1639690/1639690 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 63677 event pairs, 2330 based on Foata normal form. 1/9402 useless extension candidates. Maximal degree in co-relation 93091. Up to 9144 conditions per place. [2024-06-21 19:00:59,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 568 selfloop transitions, 46 changer transitions 0/618 dead transitions. [2024-06-21 19:00:59,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 618 transitions, 11093 flow [2024-06-21 19:00:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:00:59,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:00:59,194 INFO L175 Difference]: Start difference. First operand has 441 places, 604 transitions, 9587 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:00:59,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 618 transitions, 11093 flow [2024-06-21 19:01:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 618 transitions, 10936 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 19:01:04,279 INFO L231 Difference]: Finished difference. Result has 446 places, 604 transitions, 9528 flow [2024-06-21 19:01:04,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9430, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9528, PETRI_PLACES=446, PETRI_TRANSITIONS=604} [2024-06-21 19:01:04,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 19:01:04,279 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 604 transitions, 9528 flow [2024-06-21 19:01:04,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:04,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:04,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:04,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 19:01:04,280 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:04,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1767178085, now seen corresponding path program 1 times [2024-06-21 19:01:04,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:04,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542300051] [2024-06-21 19:01:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:04,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:05,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:05,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542300051] [2024-06-21 19:01:05,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542300051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:05,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:05,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878929821] [2024-06-21 19:01:05,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:05,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:05,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:05,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:05,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 604 transitions, 9528 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:05,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:05,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:05,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:08,479 INFO L124 PetriNetUnfolderBase]: 5685/9272 cut-off events. [2024-06-21 19:01:08,479 INFO L125 PetriNetUnfolderBase]: For 1459831/1459831 co-relation queries the response was YES. [2024-06-21 19:01:08,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89177 conditions, 9272 events. 5685/9272 cut-off events. For 1459831/1459831 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 63633 event pairs, 2266 based on Foata normal form. 1/9264 useless extension candidates. Maximal degree in co-relation 88953. Up to 8952 conditions per place. [2024-06-21 19:01:08,637 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 579 selfloop transitions, 36 changer transitions 0/627 dead transitions. [2024-06-21 19:01:08,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 627 transitions, 11192 flow [2024-06-21 19:01:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:01:08,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 19:01:08,638 INFO L175 Difference]: Start difference. First operand has 446 places, 604 transitions, 9528 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:01:08,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 627 transitions, 11192 flow [2024-06-21 19:01:13,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 627 transitions, 11092 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:13,460 INFO L231 Difference]: Finished difference. Result has 449 places, 613 transitions, 9682 flow [2024-06-21 19:01:13,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9428, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9682, PETRI_PLACES=449, PETRI_TRANSITIONS=613} [2024-06-21 19:01:13,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-21 19:01:13,461 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 613 transitions, 9682 flow [2024-06-21 19:01:13,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:13,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:13,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:13,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 19:01:13,461 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:13,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash -783823931, now seen corresponding path program 4 times [2024-06-21 19:01:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918080931] [2024-06-21 19:01:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918080931] [2024-06-21 19:01:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918080931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:15,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:15,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:01:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601726385] [2024-06-21 19:01:15,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:01:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:01:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:01:15,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:01:15,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 613 transitions, 9682 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:15,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:15,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:01:15,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:17,805 INFO L124 PetriNetUnfolderBase]: 5602/9189 cut-off events. [2024-06-21 19:01:17,806 INFO L125 PetriNetUnfolderBase]: For 1484118/1484126 co-relation queries the response was YES. [2024-06-21 19:01:17,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89132 conditions, 9189 events. 5602/9189 cut-off events. For 1484118/1484126 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63510 event pairs, 2229 based on Foata normal form. 1/9177 useless extension candidates. Maximal degree in co-relation 88906. Up to 8799 conditions per place. [2024-06-21 19:01:17,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 581 selfloop transitions, 19 changer transitions 0/626 dead transitions. [2024-06-21 19:01:18,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 626 transitions, 10992 flow [2024-06-21 19:01:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:01:18,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:01:18,000 INFO L175 Difference]: Start difference. First operand has 449 places, 613 transitions, 9682 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:01:18,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 626 transitions, 10992 flow [2024-06-21 19:01:24,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 626 transitions, 10905 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 19:01:24,308 INFO L231 Difference]: Finished difference. Result has 454 places, 616 transitions, 9729 flow [2024-06-21 19:01:24,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9595, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9729, PETRI_PLACES=454, PETRI_TRANSITIONS=616} [2024-06-21 19:01:24,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-21 19:01:24,309 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 616 transitions, 9729 flow [2024-06-21 19:01:24,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:24,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:24,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:24,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 19:01:24,310 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:24,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash -563449701, now seen corresponding path program 2 times [2024-06-21 19:01:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:24,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416274350] [2024-06-21 19:01:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:25,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416274350] [2024-06-21 19:01:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416274350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:25,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:25,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241438036] [2024-06-21 19:01:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:25,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:25,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:25,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 616 transitions, 9729 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:25,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:25,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:25,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:28,286 INFO L124 PetriNetUnfolderBase]: 5692/9282 cut-off events. [2024-06-21 19:01:28,286 INFO L125 PetriNetUnfolderBase]: For 1508428/1508428 co-relation queries the response was YES. [2024-06-21 19:01:28,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90401 conditions, 9282 events. 5692/9282 cut-off events. For 1508428/1508428 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 63667 event pairs, 2263 based on Foata normal form. 2/9275 useless extension candidates. Maximal degree in co-relation 90173. Up to 8991 conditions per place. [2024-06-21 19:01:28,450 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 596 selfloop transitions, 21 changer transitions 0/629 dead transitions. [2024-06-21 19:01:28,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 629 transitions, 11039 flow [2024-06-21 19:01:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:01:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:01:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:01:28,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:01:28,451 INFO L175 Difference]: Start difference. First operand has 454 places, 616 transitions, 9729 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:01:28,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 629 transitions, 11039 flow [2024-06-21 19:01:34,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 629 transitions, 10927 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:34,885 INFO L231 Difference]: Finished difference. Result has 455 places, 619 transitions, 9722 flow [2024-06-21 19:01:34,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9617, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9722, PETRI_PLACES=455, PETRI_TRANSITIONS=619} [2024-06-21 19:01:34,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-21 19:01:34,886 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 619 transitions, 9722 flow [2024-06-21 19:01:34,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:34,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:34,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 19:01:34,886 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:34,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1548061664, now seen corresponding path program 4 times [2024-06-21 19:01:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:34,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932524019] [2024-06-21 19:01:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:36,089 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 19:01:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932524019] [2024-06-21 19:01:36,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932524019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:36,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:36,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:36,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467706543] [2024-06-21 19:01:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:36,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:36,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:36,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:36,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 619 transitions, 9722 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:36,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:36,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:36,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:38,904 INFO L124 PetriNetUnfolderBase]: 5697/9289 cut-off events. [2024-06-21 19:01:38,904 INFO L125 PetriNetUnfolderBase]: For 1521893/1521893 co-relation queries the response was YES. [2024-06-21 19:01:39,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90602 conditions, 9289 events. 5697/9289 cut-off events. For 1521893/1521893 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 63716 event pairs, 2263 based on Foata normal form. 1/9281 useless extension candidates. Maximal degree in co-relation 90373. Up to 9001 conditions per place. [2024-06-21 19:01:39,090 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 601 selfloop transitions, 19 changer transitions 0/632 dead transitions. [2024-06-21 19:01:39,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 632 transitions, 11062 flow [2024-06-21 19:01:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:01:39,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:01:39,093 INFO L175 Difference]: Start difference. First operand has 455 places, 619 transitions, 9722 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:01:39,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 632 transitions, 11062 flow [2024-06-21 19:01:45,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 632 transitions, 10995 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:01:45,501 INFO L231 Difference]: Finished difference. Result has 459 places, 622 transitions, 9779 flow [2024-06-21 19:01:45,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9779, PETRI_PLACES=459, PETRI_TRANSITIONS=622} [2024-06-21 19:01:45,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-21 19:01:45,501 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 622 transitions, 9779 flow [2024-06-21 19:01:45,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:45,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:45,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:45,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 19:01:45,502 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:45,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:45,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1548061447, now seen corresponding path program 3 times [2024-06-21 19:01:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:45,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037380240] [2024-06-21 19:01:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:45,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037380240] [2024-06-21 19:01:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037380240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:46,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:46,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100264284] [2024-06-21 19:01:46,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:46,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:46,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 622 transitions, 9779 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:46,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:46,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:46,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:49,578 INFO L124 PetriNetUnfolderBase]: 5702/9298 cut-off events. [2024-06-21 19:01:49,579 INFO L125 PetriNetUnfolderBase]: For 1542578/1542578 co-relation queries the response was YES. [2024-06-21 19:01:49,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90776 conditions, 9298 events. 5702/9298 cut-off events. For 1542578/1542578 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 63739 event pairs, 2263 based on Foata normal form. 1/9290 useless extension candidates. Maximal degree in co-relation 90545. Up to 8999 conditions per place. [2024-06-21 19:01:49,768 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 597 selfloop transitions, 26 changer transitions 0/635 dead transitions. [2024-06-21 19:01:49,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 635 transitions, 11107 flow [2024-06-21 19:01:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:01:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:01:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:01:49,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:01:49,770 INFO L175 Difference]: Start difference. First operand has 459 places, 622 transitions, 9779 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:01:49,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 635 transitions, 11107 flow [2024-06-21 19:01:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 635 transitions, 11011 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:56,703 INFO L231 Difference]: Finished difference. Result has 460 places, 625 transitions, 9803 flow [2024-06-21 19:01:56,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9683, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9803, PETRI_PLACES=460, PETRI_TRANSITIONS=625} [2024-06-21 19:01:56,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-21 19:01:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 625 transitions, 9803 flow [2024-06-21 19:01:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:56,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:56,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 19:01:56,705 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:56,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash -571068261, now seen corresponding path program 4 times [2024-06-21 19:01:56,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:56,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114189969] [2024-06-21 19:01:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:58,047 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 19:01:58,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:58,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114189969] [2024-06-21 19:01:58,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114189969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:58,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:58,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:58,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543028027] [2024-06-21 19:01:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:58,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:58,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:58,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:58,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 625 transitions, 9803 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:58,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:58,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:58,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:00,862 INFO L124 PetriNetUnfolderBase]: 5694/9289 cut-off events. [2024-06-21 19:02:00,862 INFO L125 PetriNetUnfolderBase]: For 1555255/1555255 co-relation queries the response was YES. [2024-06-21 19:02:01,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90733 conditions, 9289 events. 5694/9289 cut-off events. For 1555255/1555255 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 63740 event pairs, 2263 based on Foata normal form. 1/9281 useless extension candidates. Maximal degree in co-relation 90501. Up to 8982 conditions per place. [2024-06-21 19:02:01,054 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 590 selfloop transitions, 33 changer transitions 0/635 dead transitions. [2024-06-21 19:02:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 635 transitions, 11075 flow [2024-06-21 19:02:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 19:02:01,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 19:02:01,055 INFO L175 Difference]: Start difference. First operand has 460 places, 625 transitions, 9803 flow. Second operand 9 states and 148 transitions. [2024-06-21 19:02:01,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 635 transitions, 11075 flow [2024-06-21 19:02:07,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 635 transitions, 10965 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 19:02:07,913 INFO L231 Difference]: Finished difference. Result has 463 places, 625 transitions, 9765 flow [2024-06-21 19:02:07,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9765, PETRI_PLACES=463, PETRI_TRANSITIONS=625} [2024-06-21 19:02:07,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-21 19:02:07,913 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 625 transitions, 9765 flow [2024-06-21 19:02:07,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:07,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 19:02:07,914 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:07,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:07,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1555413314, now seen corresponding path program 5 times [2024-06-21 19:02:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:07,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108653081] [2024-06-21 19:02:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108653081] [2024-06-21 19:02:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108653081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:09,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:09,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:09,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372488564] [2024-06-21 19:02:09,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:09,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:09,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:09,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 625 transitions, 9765 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:09,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:09,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:09,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:12,154 INFO L124 PetriNetUnfolderBase]: 5699/9296 cut-off events. [2024-06-21 19:02:12,155 INFO L125 PetriNetUnfolderBase]: For 1576055/1576055 co-relation queries the response was YES. [2024-06-21 19:02:12,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90948 conditions, 9296 events. 5699/9296 cut-off events. For 1576055/1576055 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 63868 event pairs, 2263 based on Foata normal form. 1/9288 useless extension candidates. Maximal degree in co-relation 90715. Up to 8990 conditions per place. [2024-06-21 19:02:12,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 596 selfloop transitions, 31 changer transitions 0/639 dead transitions. [2024-06-21 19:02:12,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 639 transitions, 11381 flow [2024-06-21 19:02:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:02:12,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 19:02:12,325 INFO L175 Difference]: Start difference. First operand has 463 places, 625 transitions, 9765 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:02:12,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 639 transitions, 11381 flow [2024-06-21 19:02:19,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 639 transitions, 11258 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 19:02:19,528 INFO L231 Difference]: Finished difference. Result has 464 places, 628 transitions, 9790 flow [2024-06-21 19:02:19,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9642, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9790, PETRI_PLACES=464, PETRI_TRANSITIONS=628} [2024-06-21 19:02:19,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 19:02:19,529 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 628 transitions, 9790 flow [2024-06-21 19:02:19,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:19,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:19,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:19,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 19:02:19,529 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:19,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash -571074058, now seen corresponding path program 6 times [2024-06-21 19:02:19,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922697107] [2024-06-21 19:02:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:20,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:20,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922697107] [2024-06-21 19:02:20,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922697107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:20,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:20,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:20,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511121537] [2024-06-21 19:02:20,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:20,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:20,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:20,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:20,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 628 transitions, 9790 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:20,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:20,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:20,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:23,580 INFO L124 PetriNetUnfolderBase]: 5696/9292 cut-off events. [2024-06-21 19:02:23,580 INFO L125 PetriNetUnfolderBase]: For 1588580/1588580 co-relation queries the response was YES. [2024-06-21 19:02:23,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90898 conditions, 9292 events. 5696/9292 cut-off events. For 1588580/1588580 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 63816 event pairs, 2263 based on Foata normal form. 1/9284 useless extension candidates. Maximal degree in co-relation 90664. Up to 8987 conditions per place. [2024-06-21 19:02:23,749 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 32 changer transitions 0/638 dead transitions. [2024-06-21 19:02:23,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 638 transitions, 11068 flow [2024-06-21 19:02:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:02:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:02:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:02:23,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:02:23,750 INFO L175 Difference]: Start difference. First operand has 464 places, 628 transitions, 9790 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:02:23,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 638 transitions, 11068 flow [2024-06-21 19:02:31,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 638 transitions, 10862 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 19:02:31,154 INFO L231 Difference]: Finished difference. Result has 465 places, 628 transitions, 9654 flow [2024-06-21 19:02:31,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9654, PETRI_PLACES=465, PETRI_TRANSITIONS=628} [2024-06-21 19:02:31,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-21 19:02:31,154 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 628 transitions, 9654 flow [2024-06-21 19:02:31,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:31,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:31,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 19:02:31,155 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:31,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2137893755, now seen corresponding path program 1 times [2024-06-21 19:02:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:31,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259216259] [2024-06-21 19:02:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:31,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259216259] [2024-06-21 19:02:32,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259216259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:32,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:32,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454764154] [2024-06-21 19:02:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:32,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:32,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:33,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:33,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 628 transitions, 9654 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:33,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:33,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:33,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:35,915 INFO L124 PetriNetUnfolderBase]: 5764/9363 cut-off events. [2024-06-21 19:02:35,915 INFO L125 PetriNetUnfolderBase]: For 1840320/1840328 co-relation queries the response was YES. [2024-06-21 19:02:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95078 conditions, 9363 events. 5764/9363 cut-off events. For 1840320/1840328 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 63840 event pairs, 1400 based on Foata normal form. 1/9349 useless extension candidates. Maximal degree in co-relation 94843. Up to 8925 conditions per place. [2024-06-21 19:02:36,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 568 selfloop transitions, 66 changer transitions 0/654 dead transitions. [2024-06-21 19:02:36,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 654 transitions, 11410 flow [2024-06-21 19:02:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:02:36,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:02:36,099 INFO L175 Difference]: Start difference. First operand has 465 places, 628 transitions, 9654 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:02:36,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 654 transitions, 11410 flow [2024-06-21 19:02:43,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 654 transitions, 11338 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:02:43,376 INFO L231 Difference]: Finished difference. Result has 467 places, 634 transitions, 9900 flow [2024-06-21 19:02:43,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9582, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9900, PETRI_PLACES=467, PETRI_TRANSITIONS=634} [2024-06-21 19:02:43,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-21 19:02:43,376 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 634 transitions, 9900 flow [2024-06-21 19:02:43,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:43,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:43,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 19:02:43,377 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:43,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash -252445053, now seen corresponding path program 2 times [2024-06-21 19:02:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036640899] [2024-06-21 19:02:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:44,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:44,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036640899] [2024-06-21 19:02:44,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036640899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:44,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:44,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839522366] [2024-06-21 19:02:44,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:45,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:45,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 634 transitions, 9900 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:45,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:45,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:45,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:47,918 INFO L124 PetriNetUnfolderBase]: 5779/9386 cut-off events. [2024-06-21 19:02:47,918 INFO L125 PetriNetUnfolderBase]: For 1874577/1874581 co-relation queries the response was YES. [2024-06-21 19:02:48,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96135 conditions, 9386 events. 5779/9386 cut-off events. For 1874577/1874581 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63984 event pairs, 1403 based on Foata normal form. 1/9376 useless extension candidates. Maximal degree in co-relation 95899. Up to 8973 conditions per place. [2024-06-21 19:02:48,101 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 63 changer transitions 0/659 dead transitions. [2024-06-21 19:02:48,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 659 transitions, 11407 flow [2024-06-21 19:02:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:02:48,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:02:48,103 INFO L175 Difference]: Start difference. First operand has 467 places, 634 transitions, 9900 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:02:48,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 659 transitions, 11407 flow [2024-06-21 19:02:56,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 659 transitions, 11175 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-21 19:02:56,363 INFO L231 Difference]: Finished difference. Result has 472 places, 643 transitions, 9990 flow [2024-06-21 19:02:56,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9720, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9990, PETRI_PLACES=472, PETRI_TRANSITIONS=643} [2024-06-21 19:02:56,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-21 19:02:56,364 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 643 transitions, 9990 flow [2024-06-21 19:02:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:56,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:56,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 19:02:56,365 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:56,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2022602585, now seen corresponding path program 3 times [2024-06-21 19:02:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:56,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594527169] [2024-06-21 19:02:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594527169] [2024-06-21 19:02:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594527169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:58,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:58,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:58,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241967841] [2024-06-21 19:02:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:58,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:58,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:58,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 643 transitions, 9990 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:58,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:58,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:58,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:01,157 INFO L124 PetriNetUnfolderBase]: 5792/9403 cut-off events. [2024-06-21 19:03:01,157 INFO L125 PetriNetUnfolderBase]: For 1909044/1909048 co-relation queries the response was YES. [2024-06-21 19:03:01,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96646 conditions, 9403 events. 5792/9403 cut-off events. For 1909044/1909048 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 64102 event pairs, 1329 based on Foata normal form. 1/9396 useless extension candidates. Maximal degree in co-relation 96410. Up to 8897 conditions per place. [2024-06-21 19:03:01,342 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 98 changer transitions 0/670 dead transitions. [2024-06-21 19:03:01,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 670 transitions, 12058 flow [2024-06-21 19:03:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:03:01,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:03:01,344 INFO L175 Difference]: Start difference. First operand has 472 places, 643 transitions, 9990 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:03:01,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 670 transitions, 12058 flow [2024-06-21 19:03:11,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 670 transitions, 11922 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 19:03:11,014 INFO L231 Difference]: Finished difference. Result has 475 places, 649 transitions, 10247 flow [2024-06-21 19:03:11,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9854, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10247, PETRI_PLACES=475, PETRI_TRANSITIONS=649} [2024-06-21 19:03:11,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-21 19:03:11,015 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 649 transitions, 10247 flow [2024-06-21 19:03:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:11,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:11,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:11,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 19:03:11,016 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:11,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash -142689057, now seen corresponding path program 1 times [2024-06-21 19:03:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:11,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183580739] [2024-06-21 19:03:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:12,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:12,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183580739] [2024-06-21 19:03:12,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183580739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:12,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:12,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509227744] [2024-06-21 19:03:12,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:12,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:03:12,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 649 transitions, 10247 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:12,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:12,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:03:12,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:15,333 INFO L124 PetriNetUnfolderBase]: 5797/9415 cut-off events. [2024-06-21 19:03:15,333 INFO L125 PetriNetUnfolderBase]: For 1941872/1941878 co-relation queries the response was YES. [2024-06-21 19:03:15,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97546 conditions, 9415 events. 5797/9415 cut-off events. For 1941872/1941878 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 64184 event pairs, 1621 based on Foata normal form. 3/9411 useless extension candidates. Maximal degree in co-relation 97309. Up to 9051 conditions per place. [2024-06-21 19:03:15,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 619 selfloop transitions, 32 changer transitions 0/671 dead transitions. [2024-06-21 19:03:15,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 671 transitions, 11685 flow [2024-06-21 19:03:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:03:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:03:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:03:15,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:03:15,523 INFO L175 Difference]: Start difference. First operand has 475 places, 649 transitions, 10247 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:03:15,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 671 transitions, 11685 flow [2024-06-21 19:03:24,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 671 transitions, 11370 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-21 19:03:24,367 INFO L231 Difference]: Finished difference. Result has 478 places, 652 transitions, 10089 flow [2024-06-21 19:03:24,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9934, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10089, PETRI_PLACES=478, PETRI_TRANSITIONS=652} [2024-06-21 19:03:24,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-21 19:03:24,368 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 652 transitions, 10089 flow [2024-06-21 19:03:24,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:24,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:24,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:24,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 19:03:24,369 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:24,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:24,370 INFO L85 PathProgramCache]: Analyzing trace with hash 934437993, now seen corresponding path program 4 times [2024-06-21 19:03:24,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:24,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654438194] [2024-06-21 19:03:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:24,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:26,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:26,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654438194] [2024-06-21 19:03:26,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654438194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:26,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577676686] [2024-06-21 19:03:26,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:26,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:26,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:26,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:03:26,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 652 transitions, 10089 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:26,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:26,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:03:26,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:29,148 INFO L124 PetriNetUnfolderBase]: 5802/9419 cut-off events. [2024-06-21 19:03:29,148 INFO L125 PetriNetUnfolderBase]: For 1958158/1958162 co-relation queries the response was YES. [2024-06-21 19:03:29,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97280 conditions, 9419 events. 5802/9419 cut-off events. For 1958158/1958162 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 64196 event pairs, 1328 based on Foata normal form. 1/9412 useless extension candidates. Maximal degree in co-relation 97042. Up to 8910 conditions per place. [2024-06-21 19:03:29,331 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 551 selfloop transitions, 101 changer transitions 0/672 dead transitions. [2024-06-21 19:03:29,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 672 transitions, 11753 flow [2024-06-21 19:03:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 19:03:29,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:03:29,333 INFO L175 Difference]: Start difference. First operand has 478 places, 652 transitions, 10089 flow. Second operand 8 states and 152 transitions. [2024-06-21 19:03:29,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 672 transitions, 11753 flow [2024-06-21 19:03:38,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 672 transitions, 11622 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 19:03:38,925 INFO L231 Difference]: Finished difference. Result has 479 places, 655 transitions, 10213 flow [2024-06-21 19:03:38,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9958, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10213, PETRI_PLACES=479, PETRI_TRANSITIONS=655} [2024-06-21 19:03:38,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-21 19:03:38,926 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 655 transitions, 10213 flow [2024-06-21 19:03:38,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:38,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:38,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:38,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 19:03:38,927 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:38,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2022303683, now seen corresponding path program 1 times [2024-06-21 19:03:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:38,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678485281] [2024-06-21 19:03:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678485281] [2024-06-21 19:03:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678485281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:40,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:40,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431883186] [2024-06-21 19:03:40,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:40,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:40,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 655 transitions, 10213 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:40,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:40,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:40,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:42,998 INFO L124 PetriNetUnfolderBase]: 5907/9536 cut-off events. [2024-06-21 19:03:42,998 INFO L125 PetriNetUnfolderBase]: For 1992208/1992210 co-relation queries the response was YES. [2024-06-21 19:03:43,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98598 conditions, 9536 events. 5907/9536 cut-off events. For 1992208/1992210 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 64551 event pairs, 1649 based on Foata normal form. 3/9536 useless extension candidates. Maximal degree in co-relation 98359. Up to 9233 conditions per place. [2024-06-21 19:03:43,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 624 selfloop transitions, 62 changer transitions 0/690 dead transitions. [2024-06-21 19:03:43,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 690 transitions, 12208 flow [2024-06-21 19:03:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:03:43,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:03:43,194 INFO L175 Difference]: Start difference. First operand has 479 places, 655 transitions, 10213 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:03:43,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 690 transitions, 12208 flow [2024-06-21 19:03:52,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 690 transitions, 12024 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 19:03:52,337 INFO L231 Difference]: Finished difference. Result has 484 places, 673 transitions, 10533 flow [2024-06-21 19:03:52,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10029, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10533, PETRI_PLACES=484, PETRI_TRANSITIONS=673} [2024-06-21 19:03:52,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-21 19:03:52,337 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 673 transitions, 10533 flow [2024-06-21 19:03:52,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:52,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:52,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 19:03:52,338 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:52,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash 934438179, now seen corresponding path program 2 times [2024-06-21 19:03:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:52,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401086258] [2024-06-21 19:03:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:53,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:53,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401086258] [2024-06-21 19:03:53,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401086258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:53,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:53,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:53,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235295186] [2024-06-21 19:03:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:53,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:53,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:03:53,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 673 transitions, 10533 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:53,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:53,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:03:53,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:56,981 INFO L124 PetriNetUnfolderBase]: 5848/9482 cut-off events. [2024-06-21 19:03:56,981 INFO L125 PetriNetUnfolderBase]: For 2033578/2033580 co-relation queries the response was YES. [2024-06-21 19:03:57,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99054 conditions, 9482 events. 5848/9482 cut-off events. For 2033578/2033580 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 64604 event pairs, 1623 based on Foata normal form. 3/9482 useless extension candidates. Maximal degree in co-relation 98811. Up to 9066 conditions per place. [2024-06-21 19:03:57,179 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 610 selfloop transitions, 59 changer transitions 0/696 dead transitions. [2024-06-21 19:03:57,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 696 transitions, 12361 flow [2024-06-21 19:03:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 19:03:57,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 19:03:57,181 INFO L175 Difference]: Start difference. First operand has 484 places, 673 transitions, 10533 flow. Second operand 8 states and 149 transitions. [2024-06-21 19:03:57,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 696 transitions, 12361 flow [2024-06-21 19:04:06,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 696 transitions, 12239 flow, removed 57 selfloop flow, removed 1 redundant places. [2024-06-21 19:04:06,389 INFO L231 Difference]: Finished difference. Result has 491 places, 679 transitions, 10714 flow [2024-06-21 19:04:06,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10411, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10714, PETRI_PLACES=491, PETRI_TRANSITIONS=679} [2024-06-21 19:04:06,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-21 19:04:06,390 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 679 transitions, 10714 flow [2024-06-21 19:04:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:06,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:06,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 19:04:06,391 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:06,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1845292505, now seen corresponding path program 5 times [2024-06-21 19:04:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116505869] [2024-06-21 19:04:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116505869] [2024-06-21 19:04:08,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116505869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:08,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:08,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:08,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168682865] [2024-06-21 19:04:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:08,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:08,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:04:08,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 679 transitions, 10714 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:08,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:08,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:04:08,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:11,966 INFO L124 PetriNetUnfolderBase]: 5853/9484 cut-off events. [2024-06-21 19:04:11,967 INFO L125 PetriNetUnfolderBase]: For 2063091/2063091 co-relation queries the response was YES. [2024-06-21 19:04:12,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99592 conditions, 9484 events. 5853/9484 cut-off events. For 2063091/2063091 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 64462 event pairs, 1328 based on Foata normal form. 1/9481 useless extension candidates. Maximal degree in co-relation 99345. Up to 9063 conditions per place. [2024-06-21 19:04:12,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 62 changer transitions 0/695 dead transitions. [2024-06-21 19:04:12,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 695 transitions, 12143 flow [2024-06-21 19:04:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:04:12,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 19:04:12,136 INFO L175 Difference]: Start difference. First operand has 491 places, 679 transitions, 10714 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:04:12,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 695 transitions, 12143 flow [2024-06-21 19:04:18,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 695 transitions, 12003 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 19:04:18,821 INFO L231 Difference]: Finished difference. Result has 495 places, 682 transitions, 10768 flow [2024-06-21 19:04:18,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10768, PETRI_PLACES=495, PETRI_TRANSITIONS=682} [2024-06-21 19:04:18,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-21 19:04:18,822 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 682 transitions, 10768 flow [2024-06-21 19:04:18,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:18,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:18,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 19:04:18,822 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:18,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 34562619, now seen corresponding path program 2 times [2024-06-21 19:04:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:18,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22197214] [2024-06-21 19:04:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:20,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22197214] [2024-06-21 19:04:20,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22197214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:20,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:20,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:20,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389122234] [2024-06-21 19:04:20,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:20,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:20,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:20,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:20,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 682 transitions, 10768 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:20,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:20,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:20,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:23,662 INFO L124 PetriNetUnfolderBase]: 5938/9581 cut-off events. [2024-06-21 19:04:23,663 INFO L125 PetriNetUnfolderBase]: For 2096147/2096149 co-relation queries the response was YES. [2024-06-21 19:04:23,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100547 conditions, 9581 events. 5938/9581 cut-off events. For 2096147/2096149 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 64875 event pairs, 1647 based on Foata normal form. 3/9581 useless extension candidates. Maximal degree in co-relation 100298. Up to 9309 conditions per place. [2024-06-21 19:04:23,838 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 646 selfloop transitions, 53 changer transitions 0/703 dead transitions. [2024-06-21 19:04:23,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 703 transitions, 12585 flow [2024-06-21 19:04:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:04:23,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:04:23,840 INFO L175 Difference]: Start difference. First operand has 495 places, 682 transitions, 10768 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:04:23,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 703 transitions, 12585 flow [2024-06-21 19:04:32,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 703 transitions, 12451 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 19:04:32,612 INFO L231 Difference]: Finished difference. Result has 499 places, 689 transitions, 10860 flow [2024-06-21 19:04:32,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10860, PETRI_PLACES=499, PETRI_TRANSITIONS=689} [2024-06-21 19:04:32,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-21 19:04:32,613 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 689 transitions, 10860 flow [2024-06-21 19:04:32,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:32,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:32,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:32,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 19:04:32,614 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:32,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1845172349, now seen corresponding path program 3 times [2024-06-21 19:04:32,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:32,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488941189] [2024-06-21 19:04:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:32,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488941189] [2024-06-21 19:04:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488941189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:33,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:33,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73849207] [2024-06-21 19:04:33,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:34,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:04:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 689 transitions, 10860 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:34,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:04:34,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:37,543 INFO L124 PetriNetUnfolderBase]: 5871/9514 cut-off events. [2024-06-21 19:04:37,543 INFO L125 PetriNetUnfolderBase]: For 2126033/2126035 co-relation queries the response was YES. [2024-06-21 19:04:37,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100363 conditions, 9514 events. 5871/9514 cut-off events. For 2126033/2126035 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 64783 event pairs, 1622 based on Foata normal form. 3/9514 useless extension candidates. Maximal degree in co-relation 100112. Up to 9143 conditions per place. [2024-06-21 19:04:37,733 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 637 selfloop transitions, 39 changer transitions 0/705 dead transitions. [2024-06-21 19:04:37,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 705 transitions, 12326 flow [2024-06-21 19:04:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:04:37,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 19:04:37,734 INFO L175 Difference]: Start difference. First operand has 499 places, 689 transitions, 10860 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:04:37,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 705 transitions, 12326 flow [2024-06-21 19:04:45,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 705 transitions, 12231 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 19:04:45,731 INFO L231 Difference]: Finished difference. Result has 504 places, 692 transitions, 10934 flow [2024-06-21 19:04:45,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10765, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10934, PETRI_PLACES=504, PETRI_TRANSITIONS=692} [2024-06-21 19:04:45,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-21 19:04:45,732 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 692 transitions, 10934 flow [2024-06-21 19:04:45,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:45,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:45,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 19:04:45,733 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:45,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1845172535, now seen corresponding path program 6 times [2024-06-21 19:04:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:45,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309180789] [2024-06-21 19:04:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:47,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:47,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309180789] [2024-06-21 19:04:47,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309180789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:47,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:47,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849258] [2024-06-21 19:04:47,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:47,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:47,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:47,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:47,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:04:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 692 transitions, 10934 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:04:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:50,911 INFO L124 PetriNetUnfolderBase]: 5876/9518 cut-off events. [2024-06-21 19:04:50,911 INFO L125 PetriNetUnfolderBase]: For 2152885/2152885 co-relation queries the response was YES. [2024-06-21 19:04:51,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100653 conditions, 9518 events. 5876/9518 cut-off events. For 2152885/2152885 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 64713 event pairs, 1328 based on Foata normal form. 1/9515 useless extension candidates. Maximal degree in co-relation 100400. Up to 9074 conditions per place. [2024-06-21 19:04:51,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 607 selfloop transitions, 72 changer transitions 0/708 dead transitions. [2024-06-21 19:04:51,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 708 transitions, 12377 flow [2024-06-21 19:04:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:04:51,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:04:51,086 INFO L175 Difference]: Start difference. First operand has 504 places, 692 transitions, 10934 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:04:51,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 708 transitions, 12377 flow [2024-06-21 19:05:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 708 transitions, 12246 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:00,075 INFO L231 Difference]: Finished difference. Result has 508 places, 695 transitions, 11009 flow [2024-06-21 19:05:00,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11009, PETRI_PLACES=508, PETRI_TRANSITIONS=695} [2024-06-21 19:05:00,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-21 19:05:00,076 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 695 transitions, 11009 flow [2024-06-21 19:05:00,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:00,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:00,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:00,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 19:05:00,077 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:00,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1844935013, now seen corresponding path program 3 times [2024-06-21 19:05:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252990344] [2024-06-21 19:05:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:01,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252990344] [2024-06-21 19:05:01,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252990344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:01,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:01,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579383426] [2024-06-21 19:05:01,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:01,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:01,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 695 transitions, 11009 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:01,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:01,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:01,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15