./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix018.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/mix018.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/mix018.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix018.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 18:37:58,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:37:58,601 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:37:58,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:37:58,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:37:58,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:37:58,628 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:37:58,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:37:58,629 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:37:58,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:37:58,632 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:37:58,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:37:58,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:37:58,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:37:58,634 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:37:58,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:37:58,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:37:58,635 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:37:58,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:37:58,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:37:58,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:37:58,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:37:58,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:37:58,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:37:58,636 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:37:58,637 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:37:58,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:37:58,637 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:37:58,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:37:58,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:37:58,639 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:37:58,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:37:58,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:37:58,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:37:58,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:37:58,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:37:58,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:37:58,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:37:58,640 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:37:58,640 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:37:58,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:37:58,641 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:37:58,641 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:37:58,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:37:58,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:37:58,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:37:58,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:37:58,853 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:37:58,854 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:37:58,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix018.opt.yml/witness.yml [2024-06-21 18:37:58,918 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:37:58,918 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:37:58,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix018.opt.i [2024-06-21 18:37:59,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:38:00,162 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:38:00,163 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix018.opt.i [2024-06-21 18:38:00,182 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10a95f559/361b08bfd3524149bb174b74e5006343/FLAG915730699 [2024-06-21 18:38:00,191 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10a95f559/361b08bfd3524149bb174b74e5006343 [2024-06-21 18:38:00,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:38:00,193 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:38:00,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:38:00,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:38:00,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:38:00,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:37:58" (1/2) ... [2024-06-21 18:38:00,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4726fefc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:38:00, skipping insertion in model container [2024-06-21 18:38:00,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:37:58" (1/2) ... [2024-06-21 18:38:00,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@428cefa9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:38:00, skipping insertion in model container [2024-06-21 18:38:00,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:38:00" (2/2) ... [2024-06-21 18:38:00,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4726fefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00, skipping insertion in model container [2024-06-21 18:38:00,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:38:00" (2/2) ... [2024-06-21 18:38:00,202 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:38:00,224 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:38:00,224 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:38:00,225 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:38:00,225 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:38:00,225 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:38:00,225 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:38:00,225 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 18:38:00,253 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:38:00,599 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:38:00,609 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:38:00,781 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:38:00,809 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:38:00,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00 WrapperNode [2024-06-21 18:38:00,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:38:00,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:38:00,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:38:00,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:38:00,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,880 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-21 18:38:00,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:38:00,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:38:00,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:38:00,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:38:00,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,899 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,916 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 18:38:00,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:38:00,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:38:00,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:38:00,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:38:00,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (1/1) ... [2024-06-21 18:38:00,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:38:00,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:38:00,974 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 18:38:00,991 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 18:38:01,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:38:01,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:38:01,003 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:38:01,003 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:38:01,004 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:38:01,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:38:01,004 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:38:01,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:38:01,004 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 18:38:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 18:38:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:38:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:38:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:38:01,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:38:01,007 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 18:38:01,147 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:38:01,149 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:38:01,582 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:38:01,582 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:38:01,803 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:38:01,803 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:38:01,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:38:01 BoogieIcfgContainer [2024-06-21 18:38:01,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:38:01,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:38:01,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:38:01,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:38:01,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:37:58" (1/4) ... [2024-06-21 18:38:01,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c192ed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:38:01, skipping insertion in model container [2024-06-21 18:38:01,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:38:00" (2/4) ... [2024-06-21 18:38:01,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c192ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:38:01, skipping insertion in model container [2024-06-21 18:38:01,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:38:00" (3/4) ... [2024-06-21 18:38:01,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c192ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:38:01, skipping insertion in model container [2024-06-21 18:38:01,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:38:01" (4/4) ... [2024-06-21 18:38:01,812 INFO L112 eAbstractionObserver]: Analyzing ICFG mix018.opt.i [2024-06-21 18:38:01,824 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:38:01,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 18:38:01,825 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:38:01,871 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:38:01,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 18:38:01,928 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 18:38:01,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:38:01,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:38:01,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 18:38:01,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 18:38:01,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:38:01,950 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;@791ff473, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:38:01,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 18:38:01,954 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:38:01,955 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:38:01,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:38:01,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:01,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:38:01,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:01,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash 415770089, now seen corresponding path program 1 times [2024-06-21 18:38:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893647364] [2024-06-21 18:38:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:03,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893647364] [2024-06-21 18:38:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893647364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:03,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:38:03,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390607135] [2024-06-21 18:38:03,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:03,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:38:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:38:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:38:03,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 18:38:03,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:03,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:03,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 18:38:03,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:04,236 INFO L124 PetriNetUnfolderBase]: 6201/8838 cut-off events. [2024-06-21 18:38:04,236 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 18:38:04,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17594 conditions, 8838 events. 6201/8838 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 50107 event pairs, 4673 based on Foata normal form. 1/8554 useless extension candidates. Maximal degree in co-relation 17581. Up to 8487 conditions per place. [2024-06-21 18:38:04,288 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 41 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 18:38:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 225 flow [2024-06-21 18:38:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:38:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:38:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-21 18:38:04,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6474358974358975 [2024-06-21 18:38:04,310 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 101 transitions. [2024-06-21 18:38:04,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 225 flow [2024-06-21 18:38:04,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:38:04,317 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 18:38:04,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 18:38:04,322 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 18:38:04,322 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 18:38:04,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:04,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:04,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:04,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:38:04,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:04,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash 123126152, now seen corresponding path program 1 times [2024-06-21 18:38:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:04,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630764556] [2024-06-21 18:38:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:04,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630764556] [2024-06-21 18:38:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630764556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:05,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:05,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:38:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969113182] [2024-06-21 18:38:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:05,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:38:05,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:38:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:38:05,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 18:38:05,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 18:38:05,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:05,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 18:38:05,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:06,273 INFO L124 PetriNetUnfolderBase]: 7096/9885 cut-off events. [2024-06-21 18:38:06,273 INFO L125 PetriNetUnfolderBase]: For 2057/2057 co-relation queries the response was YES. [2024-06-21 18:38:06,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22623 conditions, 9885 events. 7096/9885 cut-off events. For 2057/2057 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54390 event pairs, 4749 based on Foata normal form. 4/9852 useless extension candidates. Maximal degree in co-relation 22611. Up to 9657 conditions per place. [2024-06-21 18:38:06,318 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 52 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 18:38:06,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 319 flow [2024-06-21 18:38:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:38:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:38:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-21 18:38:06,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201923076923077 [2024-06-21 18:38:06,320 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 129 transitions. [2024-06-21 18:38:06,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 319 flow [2024-06-21 18:38:06,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:38:06,322 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 18:38:06,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 18:38:06,322 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 18:38:06,323 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 18:38:06,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 18:38:06,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:06,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:38:06,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:06,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash -478055612, now seen corresponding path program 1 times [2024-06-21 18:38:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:06,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365206489] [2024-06-21 18:38:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:06,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:07,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:07,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365206489] [2024-06-21 18:38:07,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365206489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:07,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:07,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:38:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058949268] [2024-06-21 18:38:07,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:07,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:38:07,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:38:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:38:07,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 18:38:07,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:07,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:07,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 18:38:07,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:08,356 INFO L124 PetriNetUnfolderBase]: 7114/9927 cut-off events. [2024-06-21 18:38:08,356 INFO L125 PetriNetUnfolderBase]: For 5889/5889 co-relation queries the response was YES. [2024-06-21 18:38:08,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25473 conditions, 9927 events. 7114/9927 cut-off events. For 5889/5889 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54884 event pairs, 3563 based on Foata normal form. 7/9911 useless extension candidates. Maximal degree in co-relation 25459. Up to 9578 conditions per place. [2024-06-21 18:38:08,407 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 70 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-21 18:38:08,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 535 flow [2024-06-21 18:38:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:38:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:38:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-21 18:38:08,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 18:38:08,409 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 169 transitions. [2024-06-21 18:38:08,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 535 flow [2024-06-21 18:38:08,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 516 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:38:08,413 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-21 18:38:08,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-21 18:38:08,414 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-21 18:38:08,414 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-21 18:38:08,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:08,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:08,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:08,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:38:08,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:08,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:08,415 INFO L85 PathProgramCache]: Analyzing trace with hash -709379509, now seen corresponding path program 1 times [2024-06-21 18:38:08,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:08,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82597158] [2024-06-21 18:38:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:08,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:09,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82597158] [2024-06-21 18:38:09,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82597158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:09,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:09,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:38:09,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549891236] [2024-06-21 18:38:09,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:09,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:38:09,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:38:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:38:09,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 18:38:09,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:09,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:09,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 18:38:09,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:10,448 INFO L124 PetriNetUnfolderBase]: 7256/10147 cut-off events. [2024-06-21 18:38:10,448 INFO L125 PetriNetUnfolderBase]: For 14372/14391 co-relation queries the response was YES. [2024-06-21 18:38:10,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30757 conditions, 10147 events. 7256/10147 cut-off events. For 14372/14391 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 56420 event pairs, 2792 based on Foata normal form. 48/10170 useless extension candidates. Maximal degree in co-relation 30740. Up to 9570 conditions per place. [2024-06-21 18:38:10,507 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 80 selfloop transitions, 24 changer transitions 0/113 dead transitions. [2024-06-21 18:38:10,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 690 flow [2024-06-21 18:38:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:38:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:38:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-21 18:38:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 18:38:10,509 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 198 transitions. [2024-06-21 18:38:10,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 690 flow [2024-06-21 18:38:10,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 678 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 18:38:10,518 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 379 flow [2024-06-21 18:38:10,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=379, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 18:38:10,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-21 18:38:10,520 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 379 flow [2024-06-21 18:38:10,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:10,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:10,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:38:10,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:10,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -250596364, now seen corresponding path program 1 times [2024-06-21 18:38:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:10,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11068139] [2024-06-21 18:38:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:11,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:11,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11068139] [2024-06-21 18:38:11,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11068139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:11,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:11,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:38:11,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605805515] [2024-06-21 18:38:11,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:38:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:38:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:38:11,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 18:38:11,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 18:38:11,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:11,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 18:38:11,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:12,871 INFO L124 PetriNetUnfolderBase]: 6342/9102 cut-off events. [2024-06-21 18:38:12,871 INFO L125 PetriNetUnfolderBase]: For 17897/17919 co-relation queries the response was YES. [2024-06-21 18:38:12,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29611 conditions, 9102 events. 6342/9102 cut-off events. For 17897/17919 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 52194 event pairs, 2937 based on Foata normal form. 3/8967 useless extension candidates. Maximal degree in co-relation 29590. Up to 8693 conditions per place. [2024-06-21 18:38:12,921 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-21 18:38:12,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 585 flow [2024-06-21 18:38:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:38:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:38:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 18:38:12,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-06-21 18:38:12,923 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 379 flow. Second operand 5 states and 136 transitions. [2024-06-21 18:38:12,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 585 flow [2024-06-21 18:38:12,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 522 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 18:38:12,930 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 372 flow [2024-06-21 18:38:12,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-21 18:38:12,931 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-21 18:38:12,931 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 372 flow [2024-06-21 18:38:12,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 18:38:12,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:12,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:12,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:38:12,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:12,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash 702973063, now seen corresponding path program 1 times [2024-06-21 18:38:12,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:12,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407318484] [2024-06-21 18:38:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:14,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407318484] [2024-06-21 18:38:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407318484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:38:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730629614] [2024-06-21 18:38:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:14,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:38:14,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:38:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:38:14,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:14,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:14,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:14,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:14,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:15,425 INFO L124 PetriNetUnfolderBase]: 7396/10327 cut-off events. [2024-06-21 18:38:15,426 INFO L125 PetriNetUnfolderBase]: For 24895/24945 co-relation queries the response was YES. [2024-06-21 18:38:15,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34411 conditions, 10327 events. 7396/10327 cut-off events. For 24895/24945 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 56794 event pairs, 3428 based on Foata normal form. 40/10343 useless extension candidates. Maximal degree in co-relation 34386. Up to 9908 conditions per place. [2024-06-21 18:38:15,487 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 73 selfloop transitions, 38 changer transitions 0/119 dead transitions. [2024-06-21 18:38:15,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 872 flow [2024-06-21 18:38:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:38:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:38:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 18:38:15,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-21 18:38:15,488 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 372 flow. Second operand 6 states and 172 transitions. [2024-06-21 18:38:15,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 872 flow [2024-06-21 18:38:15,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 848 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:38:15,498 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 581 flow [2024-06-21 18:38:15,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=581, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-21 18:38:15,501 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-21 18:38:15,501 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 581 flow [2024-06-21 18:38:15,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:15,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:15,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:15,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:38:15,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:15,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash -304912877, now seen corresponding path program 2 times [2024-06-21 18:38:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:15,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226664217] [2024-06-21 18:38:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:15,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:16,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226664217] [2024-06-21 18:38:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226664217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:16,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:16,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:38:16,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363468692] [2024-06-21 18:38:16,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:16,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:38:16,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:38:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:38:16,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:16,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 581 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:16,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:16,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:16,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:17,934 INFO L124 PetriNetUnfolderBase]: 7381/10331 cut-off events. [2024-06-21 18:38:17,934 INFO L125 PetriNetUnfolderBase]: For 29768/29833 co-relation queries the response was YES. [2024-06-21 18:38:17,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35532 conditions, 10331 events. 7381/10331 cut-off events. For 29768/29833 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 57025 event pairs, 3430 based on Foata normal form. 67/10374 useless extension candidates. Maximal degree in co-relation 35504. Up to 9893 conditions per place. [2024-06-21 18:38:18,005 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 64 selfloop transitions, 42 changer transitions 0/114 dead transitions. [2024-06-21 18:38:18,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 913 flow [2024-06-21 18:38:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:38:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:38:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 18:38:18,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-21 18:38:18,007 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 581 flow. Second operand 6 states and 167 transitions. [2024-06-21 18:38:18,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 913 flow [2024-06-21 18:38:18,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 867 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 18:38:18,027 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 640 flow [2024-06-21 18:38:18,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=640, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-21 18:38:18,027 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 18:38:18,027 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 640 flow [2024-06-21 18:38:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:18,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:18,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:38:18,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:18,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash 706885809, now seen corresponding path program 3 times [2024-06-21 18:38:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242761213] [2024-06-21 18:38:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:18,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242761213] [2024-06-21 18:38:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242761213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:18,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:18,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:38:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675556694] [2024-06-21 18:38:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:38:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:38:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:38:19,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:19,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 640 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:19,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:19,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:19,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:20,503 INFO L124 PetriNetUnfolderBase]: 7471/10462 cut-off events. [2024-06-21 18:38:20,503 INFO L125 PetriNetUnfolderBase]: For 36609/36658 co-relation queries the response was YES. [2024-06-21 18:38:20,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37131 conditions, 10462 events. 7471/10462 cut-off events. For 36609/36658 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 57806 event pairs, 3406 based on Foata normal form. 34/10482 useless extension candidates. Maximal degree in co-relation 37100. Up to 9931 conditions per place. [2024-06-21 18:38:20,575 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 75 selfloop transitions, 60 changer transitions 0/143 dead transitions. [2024-06-21 18:38:20,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 143 transitions, 1233 flow [2024-06-21 18:38:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:38:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:38:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 18:38:20,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-21 18:38:20,577 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 640 flow. Second operand 7 states and 191 transitions. [2024-06-21 18:38:20,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 143 transitions, 1233 flow [2024-06-21 18:38:20,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 143 transitions, 1156 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 18:38:20,608 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 971 flow [2024-06-21 18:38:20,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=971, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2024-06-21 18:38:20,609 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 18:38:20,609 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 971 flow [2024-06-21 18:38:20,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:20,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:20,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:38:20,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:20,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -862117509, now seen corresponding path program 1 times [2024-06-21 18:38:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:20,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130300358] [2024-06-21 18:38:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:21,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130300358] [2024-06-21 18:38:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130300358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:21,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:38:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695035172] [2024-06-21 18:38:21,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:21,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:38:21,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:38:21,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:38:22,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:22,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 971 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 18:38:22,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:22,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:22,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:23,624 INFO L124 PetriNetUnfolderBase]: 8469/12039 cut-off events. [2024-06-21 18:38:23,625 INFO L125 PetriNetUnfolderBase]: For 48441/48443 co-relation queries the response was YES. [2024-06-21 18:38:23,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43310 conditions, 12039 events. 8469/12039 cut-off events. For 48441/48443 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 67290 event pairs, 3855 based on Foata normal form. 6/11880 useless extension candidates. Maximal degree in co-relation 43275. Up to 11487 conditions per place. [2024-06-21 18:38:23,701 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 120 selfloop transitions, 19 changer transitions 0/147 dead transitions. [2024-06-21 18:38:23,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 147 transitions, 1415 flow [2024-06-21 18:38:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:38:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:38:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:38:23,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 18:38:23,703 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 971 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:38:23,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 147 transitions, 1415 flow [2024-06-21 18:38:23,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 1284 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:23,763 INFO L231 Difference]: Finished difference. Result has 90 places, 116 transitions, 971 flow [2024-06-21 18:38:23,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=971, PETRI_PLACES=90, PETRI_TRANSITIONS=116} [2024-06-21 18:38:23,764 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-21 18:38:23,764 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 116 transitions, 971 flow [2024-06-21 18:38:23,764 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 18:38:23,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:23,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:23,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:38:23,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:23,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 366785778, now seen corresponding path program 1 times [2024-06-21 18:38:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:23,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345094423] [2024-06-21 18:38:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:24,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:24,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345094423] [2024-06-21 18:38:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345094423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:24,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:24,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:38:24,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059215341] [2024-06-21 18:38:24,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:24,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:38:24,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:38:24,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:38:24,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:24,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 116 transitions, 971 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:24,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:24,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:24,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:26,015 INFO L124 PetriNetUnfolderBase]: 8455/12157 cut-off events. [2024-06-21 18:38:26,016 INFO L125 PetriNetUnfolderBase]: For 56530/56532 co-relation queries the response was YES. [2024-06-21 18:38:26,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45732 conditions, 12157 events. 8455/12157 cut-off events. For 56530/56532 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 68850 event pairs, 3922 based on Foata normal form. 4/12144 useless extension candidates. Maximal degree in co-relation 45696. Up to 11511 conditions per place. [2024-06-21 18:38:26,096 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 114 selfloop transitions, 12 changer transitions 0/134 dead transitions. [2024-06-21 18:38:26,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 1297 flow [2024-06-21 18:38:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:38:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:38:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 18:38:26,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49615384615384617 [2024-06-21 18:38:26,097 INFO L175 Difference]: Start difference. First operand has 90 places, 116 transitions, 971 flow. Second operand 5 states and 129 transitions. [2024-06-21 18:38:26,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 1297 flow [2024-06-21 18:38:26,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1219 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:38:26,163 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 968 flow [2024-06-21 18:38:26,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=968, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-06-21 18:38:26,164 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-21 18:38:26,164 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 968 flow [2024-06-21 18:38:26,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:26,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:26,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:26,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:38:26,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:26,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1141147586, now seen corresponding path program 1 times [2024-06-21 18:38:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:26,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758178216] [2024-06-21 18:38:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:26,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:27,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:27,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758178216] [2024-06-21 18:38:27,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758178216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:27,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:27,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:38:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944197866] [2024-06-21 18:38:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:38:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:38:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:38:27,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:27,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 968 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:27,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:27,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:27,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:29,354 INFO L124 PetriNetUnfolderBase]: 9412/13152 cut-off events. [2024-06-21 18:38:29,354 INFO L125 PetriNetUnfolderBase]: For 81939/82016 co-relation queries the response was YES. [2024-06-21 18:38:29,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52982 conditions, 13152 events. 9412/13152 cut-off events. For 81939/82016 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 73652 event pairs, 3753 based on Foata normal form. 71/13201 useless extension candidates. Maximal degree in co-relation 52946. Up to 12297 conditions per place. [2024-06-21 18:38:29,445 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 87 selfloop transitions, 64 changer transitions 0/160 dead transitions. [2024-06-21 18:38:29,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 160 transitions, 1430 flow [2024-06-21 18:38:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:38:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:38:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 18:38:29,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:38:29,446 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 968 flow. Second operand 8 states and 208 transitions. [2024-06-21 18:38:29,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 160 transitions, 1430 flow [2024-06-21 18:38:29,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 160 transitions, 1399 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 18:38:29,512 INFO L231 Difference]: Finished difference. Result has 94 places, 123 transitions, 1118 flow [2024-06-21 18:38:29,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=94, PETRI_TRANSITIONS=123} [2024-06-21 18:38:29,512 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 18:38:29,513 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 123 transitions, 1118 flow [2024-06-21 18:38:29,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:29,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:29,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:29,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:38:29,513 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:29,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1138290626, now seen corresponding path program 2 times [2024-06-21 18:38:29,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:29,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777107005] [2024-06-21 18:38:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777107005] [2024-06-21 18:38:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777107005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:30,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:30,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:38:30,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817498144] [2024-06-21 18:38:30,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:30,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:38:30,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:30,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:38:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:38:30,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:30,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 123 transitions, 1118 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:30,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:30,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:30,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:32,649 INFO L124 PetriNetUnfolderBase]: 9851/13868 cut-off events. [2024-06-21 18:38:32,649 INFO L125 PetriNetUnfolderBase]: For 102214/102311 co-relation queries the response was YES. [2024-06-21 18:38:32,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58794 conditions, 13868 events. 9851/13868 cut-off events. For 102214/102311 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 79180 event pairs, 3610 based on Foata normal form. 39/13879 useless extension candidates. Maximal degree in co-relation 58756. Up to 12350 conditions per place. [2024-06-21 18:38:32,766 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 101 selfloop transitions, 64 changer transitions 0/174 dead transitions. [2024-06-21 18:38:32,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 174 transitions, 1734 flow [2024-06-21 18:38:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:38:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:38:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 18:38:32,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-21 18:38:32,768 INFO L175 Difference]: Start difference. First operand has 94 places, 123 transitions, 1118 flow. Second operand 8 states and 213 transitions. [2024-06-21 18:38:32,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 174 transitions, 1734 flow [2024-06-21 18:38:32,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1591 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 18:38:32,871 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 1217 flow [2024-06-21 18:38:32,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1217, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2024-06-21 18:38:32,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-21 18:38:32,872 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 1217 flow [2024-06-21 18:38:32,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:32,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:32,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:38:32,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:32,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash 282422417, now seen corresponding path program 1 times [2024-06-21 18:38:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:32,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454751505] [2024-06-21 18:38:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454751505] [2024-06-21 18:38:33,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454751505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:33,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:33,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:38:33,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395301991] [2024-06-21 18:38:33,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:33,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:38:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:38:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:38:34,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:38:34,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 1217 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:34,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:34,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:38:34,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:35,808 INFO L124 PetriNetUnfolderBase]: 10394/14585 cut-off events. [2024-06-21 18:38:35,808 INFO L125 PetriNetUnfolderBase]: For 120672/120681 co-relation queries the response was YES. [2024-06-21 18:38:35,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64025 conditions, 14585 events. 10394/14585 cut-off events. For 120672/120681 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 80855 event pairs, 4438 based on Foata normal form. 12/14590 useless extension candidates. Maximal degree in co-relation 63986. Up to 14085 conditions per place. [2024-06-21 18:38:35,895 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 133 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-21 18:38:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 174 transitions, 1887 flow [2024-06-21 18:38:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:38:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:38:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 18:38:35,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 18:38:35,896 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 1217 flow. Second operand 6 states and 160 transitions. [2024-06-21 18:38:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 174 transitions, 1887 flow [2024-06-21 18:38:36,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 174 transitions, 1802 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 18:38:36,025 INFO L231 Difference]: Finished difference. Result has 100 places, 145 transitions, 1376 flow [2024-06-21 18:38:36,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1376, PETRI_PLACES=100, PETRI_TRANSITIONS=145} [2024-06-21 18:38:36,026 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 18:38:36,026 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 145 transitions, 1376 flow [2024-06-21 18:38:36,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:36,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:36,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:38:36,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:36,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:36,027 INFO L85 PathProgramCache]: Analyzing trace with hash -318677666, now seen corresponding path program 1 times [2024-06-21 18:38:36,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:36,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644477127] [2024-06-21 18:38:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:36,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:37,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:37,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644477127] [2024-06-21 18:38:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644477127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:37,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:37,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:38:37,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593307758] [2024-06-21 18:38:37,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:37,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:38:37,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:38:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:38:37,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:38:37,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 145 transitions, 1376 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:37,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:37,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:38:37,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:39,697 INFO L124 PetriNetUnfolderBase]: 10470/14674 cut-off events. [2024-06-21 18:38:39,697 INFO L125 PetriNetUnfolderBase]: For 139139/139139 co-relation queries the response was YES. [2024-06-21 18:38:39,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67694 conditions, 14674 events. 10470/14674 cut-off events. For 139139/139139 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 81114 event pairs, 3948 based on Foata normal form. 6/14664 useless extension candidates. Maximal degree in co-relation 67652. Up to 13750 conditions per place. [2024-06-21 18:38:39,805 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 116 selfloop transitions, 77 changer transitions 0/200 dead transitions. [2024-06-21 18:38:39,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 200 transitions, 2042 flow [2024-06-21 18:38:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 18:38:39,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47649572649572647 [2024-06-21 18:38:39,807 INFO L175 Difference]: Start difference. First operand has 100 places, 145 transitions, 1376 flow. Second operand 9 states and 223 transitions. [2024-06-21 18:38:39,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 200 transitions, 2042 flow [2024-06-21 18:38:39,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 200 transitions, 2006 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-21 18:38:39,973 INFO L231 Difference]: Finished difference. Result has 110 places, 156 transitions, 1649 flow [2024-06-21 18:38:39,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1649, PETRI_PLACES=110, PETRI_TRANSITIONS=156} [2024-06-21 18:38:39,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-21 18:38:39,974 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 156 transitions, 1649 flow [2024-06-21 18:38:39,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:39,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:39,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:38:39,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:39,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash -82502306, now seen corresponding path program 2 times [2024-06-21 18:38:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:39,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634038782] [2024-06-21 18:38:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:39,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:41,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634038782] [2024-06-21 18:38:41,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634038782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:41,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:41,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:38:41,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039134371] [2024-06-21 18:38:41,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:41,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:38:41,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:38:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:38:41,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:38:41,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 156 transitions, 1649 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:41,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:41,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:38:41,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:43,556 INFO L124 PetriNetUnfolderBase]: 10455/14661 cut-off events. [2024-06-21 18:38:43,557 INFO L125 PetriNetUnfolderBase]: For 159207/159209 co-relation queries the response was YES. [2024-06-21 18:38:43,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70664 conditions, 14661 events. 10455/14661 cut-off events. For 159207/159209 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 81024 event pairs, 3933 based on Foata normal form. 8/14653 useless extension candidates. Maximal degree in co-relation 70617. Up to 13729 conditions per place. [2024-06-21 18:38:43,676 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 119 selfloop transitions, 98 changer transitions 0/224 dead transitions. [2024-06-21 18:38:43,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 224 transitions, 2546 flow [2024-06-21 18:38:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 18:38:43,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47649572649572647 [2024-06-21 18:38:43,679 INFO L175 Difference]: Start difference. First operand has 110 places, 156 transitions, 1649 flow. Second operand 9 states and 223 transitions. [2024-06-21 18:38:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 224 transitions, 2546 flow [2024-06-21 18:38:43,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 224 transitions, 2323 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 18:38:43,892 INFO L231 Difference]: Finished difference. Result has 114 places, 180 transitions, 1980 flow [2024-06-21 18:38:43,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=114, PETRI_TRANSITIONS=180} [2024-06-21 18:38:43,893 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-21 18:38:43,893 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 180 transitions, 1980 flow [2024-06-21 18:38:43,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:43,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:43,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:43,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:38:43,894 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:43,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash -82205636, now seen corresponding path program 3 times [2024-06-21 18:38:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:43,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725634422] [2024-06-21 18:38:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:43,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:45,374 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 18:38:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:45,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725634422] [2024-06-21 18:38:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725634422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:45,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:45,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:38:45,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862534788] [2024-06-21 18:38:45,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:45,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:38:45,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:38:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:38:45,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:38:45,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 180 transitions, 1980 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:45,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:45,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:38:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:47,697 INFO L124 PetriNetUnfolderBase]: 10765/15142 cut-off events. [2024-06-21 18:38:47,697 INFO L125 PetriNetUnfolderBase]: For 184071/184077 co-relation queries the response was YES. [2024-06-21 18:38:47,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75620 conditions, 15142 events. 10765/15142 cut-off events. For 184071/184077 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 84428 event pairs, 3079 based on Foata normal form. 12/15140 useless extension candidates. Maximal degree in co-relation 75571. Up to 13624 conditions per place. [2024-06-21 18:38:47,800 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 119 selfloop transitions, 112 changer transitions 0/238 dead transitions. [2024-06-21 18:38:47,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 238 transitions, 2814 flow [2024-06-21 18:38:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:38:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:38:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 18:38:47,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2024-06-21 18:38:47,802 INFO L175 Difference]: Start difference. First operand has 114 places, 180 transitions, 1980 flow. Second operand 9 states and 230 transitions. [2024-06-21 18:38:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 238 transitions, 2814 flow [2024-06-21 18:38:48,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 238 transitions, 2652 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 18:38:48,049 INFO L231 Difference]: Finished difference. Result has 120 places, 188 transitions, 2210 flow [2024-06-21 18:38:48,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2210, PETRI_PLACES=120, PETRI_TRANSITIONS=188} [2024-06-21 18:38:48,050 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 18:38:48,050 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 188 transitions, 2210 flow [2024-06-21 18:38:48,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:48,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:48,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:48,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:38:48,050 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:48,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash 293850257, now seen corresponding path program 2 times [2024-06-21 18:38:48,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:48,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611607823] [2024-06-21 18:38:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:48,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:49,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611607823] [2024-06-21 18:38:49,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611607823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:49,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:49,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:38:49,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183410367] [2024-06-21 18:38:49,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:49,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:38:49,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:38:49,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:38:49,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:38:49,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 188 transitions, 2210 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:49,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:49,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:38:49,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:51,149 INFO L124 PetriNetUnfolderBase]: 10751/15152 cut-off events. [2024-06-21 18:38:51,150 INFO L125 PetriNetUnfolderBase]: For 207327/207342 co-relation queries the response was YES. [2024-06-21 18:38:51,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77876 conditions, 15152 events. 10751/15152 cut-off events. For 207327/207342 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 84976 event pairs, 3957 based on Foata normal form. 16/15163 useless extension candidates. Maximal degree in co-relation 77825. Up to 14620 conditions per place. [2024-06-21 18:38:51,281 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 169 selfloop transitions, 35 changer transitions 0/211 dead transitions. [2024-06-21 18:38:51,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 211 transitions, 2754 flow [2024-06-21 18:38:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:38:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:38:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 18:38:51,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 18:38:51,283 INFO L175 Difference]: Start difference. First operand has 120 places, 188 transitions, 2210 flow. Second operand 6 states and 152 transitions. [2024-06-21 18:38:51,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 211 transitions, 2754 flow [2024-06-21 18:38:51,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 211 transitions, 2565 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:51,614 INFO L231 Difference]: Finished difference. Result has 121 places, 188 transitions, 2100 flow [2024-06-21 18:38:51,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2100, PETRI_PLACES=121, PETRI_TRANSITIONS=188} [2024-06-21 18:38:51,614 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 18:38:51,614 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 188 transitions, 2100 flow [2024-06-21 18:38:51,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:51,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:51,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:38:51,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:51,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:51,615 INFO L85 PathProgramCache]: Analyzing trace with hash 493152770, now seen corresponding path program 3 times [2024-06-21 18:38:51,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601719918] [2024-06-21 18:38:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:52,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601719918] [2024-06-21 18:38:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601719918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:52,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:38:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350908674] [2024-06-21 18:38:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:38:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:38:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:38:52,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:52,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 188 transitions, 2100 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:52,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:52,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:52,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:54,790 INFO L124 PetriNetUnfolderBase]: 11093/15867 cut-off events. [2024-06-21 18:38:54,790 INFO L125 PetriNetUnfolderBase]: For 232834/232877 co-relation queries the response was YES. [2024-06-21 18:38:54,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82270 conditions, 15867 events. 11093/15867 cut-off events. For 232834/232877 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 93816 event pairs, 4104 based on Foata normal form. 56/15875 useless extension candidates. Maximal degree in co-relation 82217. Up to 13507 conditions per place. [2024-06-21 18:38:54,965 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 153 selfloop transitions, 104 changer transitions 0/268 dead transitions. [2024-06-21 18:38:54,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 268 transitions, 3219 flow [2024-06-21 18:38:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:38:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:38:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 18:38:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 18:38:54,967 INFO L175 Difference]: Start difference. First operand has 121 places, 188 transitions, 2100 flow. Second operand 8 states and 224 transitions. [2024-06-21 18:38:54,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 268 transitions, 3219 flow [2024-06-21 18:38:55,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 268 transitions, 3173 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:38:55,430 INFO L231 Difference]: Finished difference. Result has 128 places, 210 transitions, 2622 flow [2024-06-21 18:38:55,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2622, PETRI_PLACES=128, PETRI_TRANSITIONS=210} [2024-06-21 18:38:55,431 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-21 18:38:55,431 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 210 transitions, 2622 flow [2024-06-21 18:38:55,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:55,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:55,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:38:55,432 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:55,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash -125536264, now seen corresponding path program 4 times [2024-06-21 18:38:55,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:55,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371364975] [2024-06-21 18:38:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:38:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:38:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:38:56,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371364975] [2024-06-21 18:38:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371364975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:38:56,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:38:56,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:38:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850023879] [2024-06-21 18:38:56,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:38:56,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:38:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:38:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:38:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:38:56,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:38:56,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 210 transitions, 2622 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:56,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:38:56,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:38:56,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:38:58,836 INFO L124 PetriNetUnfolderBase]: 11278/16189 cut-off events. [2024-06-21 18:38:58,836 INFO L125 PetriNetUnfolderBase]: For 266672/266715 co-relation queries the response was YES. [2024-06-21 18:38:58,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87066 conditions, 16189 events. 11278/16189 cut-off events. For 266672/266715 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 96367 event pairs, 4120 based on Foata normal form. 86/16234 useless extension candidates. Maximal degree in co-relation 87010. Up to 14754 conditions per place. [2024-06-21 18:38:58,983 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 156 selfloop transitions, 98 changer transitions 0/265 dead transitions. [2024-06-21 18:38:58,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 265 transitions, 3438 flow [2024-06-21 18:38:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:38:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:38:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 18:38:58,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264423076923077 [2024-06-21 18:38:58,992 INFO L175 Difference]: Start difference. First operand has 128 places, 210 transitions, 2622 flow. Second operand 8 states and 219 transitions. [2024-06-21 18:38:58,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 265 transitions, 3438 flow [2024-06-21 18:38:59,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 265 transitions, 3224 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 18:38:59,442 INFO L231 Difference]: Finished difference. Result has 131 places, 217 transitions, 2757 flow [2024-06-21 18:38:59,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2757, PETRI_PLACES=131, PETRI_TRANSITIONS=217} [2024-06-21 18:38:59,443 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-21 18:38:59,443 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 217 transitions, 2757 flow [2024-06-21 18:38:59,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:38:59,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:38:59,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:38:59,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:38:59,443 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:38:59,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:38:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1522811482, now seen corresponding path program 5 times [2024-06-21 18:38:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:38:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621167970] [2024-06-21 18:38:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:38:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:38:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:00,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621167970] [2024-06-21 18:39:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621167970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:00,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:00,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:39:00,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125562031] [2024-06-21 18:39:00,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:00,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:39:00,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:00,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:39:00,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:39:00,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 18:39:00,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 217 transitions, 2757 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:00,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:00,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 18:39:00,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:02,428 INFO L124 PetriNetUnfolderBase]: 8804/13924 cut-off events. [2024-06-21 18:39:02,428 INFO L125 PetriNetUnfolderBase]: For 257247/257748 co-relation queries the response was YES. [2024-06-21 18:39:02,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78643 conditions, 13924 events. 8804/13924 cut-off events. For 257247/257748 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 95256 event pairs, 2034 based on Foata normal form. 197/13529 useless extension candidates. Maximal degree in co-relation 78586. Up to 9530 conditions per place. [2024-06-21 18:39:02,568 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 103 selfloop transitions, 146 changer transitions 0/292 dead transitions. [2024-06-21 18:39:02,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 292 transitions, 4000 flow [2024-06-21 18:39:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:39:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:39:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-21 18:39:02,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-21 18:39:02,569 INFO L175 Difference]: Start difference. First operand has 131 places, 217 transitions, 2757 flow. Second operand 7 states and 214 transitions. [2024-06-21 18:39:02,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 292 transitions, 4000 flow [2024-06-21 18:39:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 292 transitions, 3794 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 18:39:03,125 INFO L231 Difference]: Finished difference. Result has 134 places, 244 transitions, 3384 flow [2024-06-21 18:39:03,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2551, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3384, PETRI_PLACES=134, PETRI_TRANSITIONS=244} [2024-06-21 18:39:03,125 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 18:39:03,125 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 244 transitions, 3384 flow [2024-06-21 18:39:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:03,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:03,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:39:03,126 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:03,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:03,126 INFO L85 PathProgramCache]: Analyzing trace with hash 471941521, now seen corresponding path program 3 times [2024-06-21 18:39:03,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:03,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874900884] [2024-06-21 18:39:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:03,944 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 18:39:03,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874900884] [2024-06-21 18:39:03,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874900884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:03,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:03,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:39:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287988993] [2024-06-21 18:39:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:39:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:39:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:39:03,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:39:03,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 244 transitions, 3384 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:03,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:03,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:39:03,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:06,493 INFO L124 PetriNetUnfolderBase]: 13068/18767 cut-off events. [2024-06-21 18:39:06,493 INFO L125 PetriNetUnfolderBase]: For 327567/327567 co-relation queries the response was YES. [2024-06-21 18:39:06,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105301 conditions, 18767 events. 13068/18767 cut-off events. For 327567/327567 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 112304 event pairs, 5157 based on Foata normal form. 4/18767 useless extension candidates. Maximal degree in co-relation 105241. Up to 17952 conditions per place. [2024-06-21 18:39:06,687 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 235 selfloop transitions, 50 changer transitions 0/292 dead transitions. [2024-06-21 18:39:06,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 292 transitions, 4165 flow [2024-06-21 18:39:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:39:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:39:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 18:39:06,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:39:06,688 INFO L175 Difference]: Start difference. First operand has 134 places, 244 transitions, 3384 flow. Second operand 7 states and 182 transitions. [2024-06-21 18:39:06,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 292 transitions, 4165 flow [2024-06-21 18:39:07,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 292 transitions, 4091 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 18:39:07,752 INFO L231 Difference]: Finished difference. Result has 140 places, 260 transitions, 3566 flow [2024-06-21 18:39:07,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3566, PETRI_PLACES=140, PETRI_TRANSITIONS=260} [2024-06-21 18:39:07,753 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-21 18:39:07,753 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 260 transitions, 3566 flow [2024-06-21 18:39:07,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:07,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:07,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:07,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:39:07,754 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:07,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 288142289, now seen corresponding path program 1 times [2024-06-21 18:39:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:07,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243610302] [2024-06-21 18:39:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:07,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243610302] [2024-06-21 18:39:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243610302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:08,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:39:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809380386] [2024-06-21 18:39:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:39:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:39:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:39:08,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:39:08,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 260 transitions, 3566 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:08,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:08,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:39:08,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:11,659 INFO L124 PetriNetUnfolderBase]: 11950/17533 cut-off events. [2024-06-21 18:39:11,659 INFO L125 PetriNetUnfolderBase]: For 300676/300676 co-relation queries the response was YES. [2024-06-21 18:39:11,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98081 conditions, 17533 events. 11950/17533 cut-off events. For 300676/300676 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 108013 event pairs, 4791 based on Foata normal form. 4/17499 useless extension candidates. Maximal degree in co-relation 98018. Up to 16532 conditions per place. [2024-06-21 18:39:12,075 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 262 selfloop transitions, 23 changer transitions 0/293 dead transitions. [2024-06-21 18:39:12,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 293 transitions, 4390 flow [2024-06-21 18:39:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:39:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:39:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 18:39:12,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 18:39:12,076 INFO L175 Difference]: Start difference. First operand has 140 places, 260 transitions, 3566 flow. Second operand 6 states and 160 transitions. [2024-06-21 18:39:12,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 293 transitions, 4390 flow [2024-06-21 18:39:12,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 293 transitions, 4306 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:39:12,617 INFO L231 Difference]: Finished difference. Result has 143 places, 268 transitions, 3639 flow [2024-06-21 18:39:12,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3639, PETRI_PLACES=143, PETRI_TRANSITIONS=268} [2024-06-21 18:39:12,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-21 18:39:12,617 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 268 transitions, 3639 flow [2024-06-21 18:39:12,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:12,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:12,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:12,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:39:12,618 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:12,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1153422659, now seen corresponding path program 2 times [2024-06-21 18:39:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:12,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668567306] [2024-06-21 18:39:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:12,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668567306] [2024-06-21 18:39:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668567306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:13,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:39:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200385873] [2024-06-21 18:39:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:39:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:39:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:39:13,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:39:13,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 268 transitions, 3639 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:13,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:13,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:39:13,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:16,474 INFO L124 PetriNetUnfolderBase]: 11936/17519 cut-off events. [2024-06-21 18:39:16,474 INFO L125 PetriNetUnfolderBase]: For 325220/325225 co-relation queries the response was YES. [2024-06-21 18:39:16,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100686 conditions, 17519 events. 11936/17519 cut-off events. For 325220/325225 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 107916 event pairs, 4768 based on Foata normal form. 8/17493 useless extension candidates. Maximal degree in co-relation 100621. Up to 16520 conditions per place. [2024-06-21 18:39:16,785 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 256 selfloop transitions, 23 changer transitions 0/287 dead transitions. [2024-06-21 18:39:16,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 287 transitions, 4259 flow [2024-06-21 18:39:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:39:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:39:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 18:39:16,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 18:39:16,786 INFO L175 Difference]: Start difference. First operand has 143 places, 268 transitions, 3639 flow. Second operand 6 states and 154 transitions. [2024-06-21 18:39:16,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 287 transitions, 4259 flow [2024-06-21 18:39:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 287 transitions, 4199 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 18:39:17,295 INFO L231 Difference]: Finished difference. Result has 147 places, 268 transitions, 3636 flow [2024-06-21 18:39:17,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3636, PETRI_PLACES=147, PETRI_TRANSITIONS=268} [2024-06-21 18:39:17,295 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-21 18:39:17,295 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 268 transitions, 3636 flow [2024-06-21 18:39:17,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:17,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:17,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:17,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:39:17,296 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:17,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 340582446, now seen corresponding path program 1 times [2024-06-21 18:39:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:17,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509665377] [2024-06-21 18:39:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:17,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:18,833 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 18:39:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509665377] [2024-06-21 18:39:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509665377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:18,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:39:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708387283] [2024-06-21 18:39:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:39:18,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:39:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:39:18,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:39:18,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 268 transitions, 3636 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:18,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:18,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:39:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:22,281 INFO L124 PetriNetUnfolderBase]: 13718/19792 cut-off events. [2024-06-21 18:39:22,281 INFO L125 PetriNetUnfolderBase]: For 406203/406213 co-relation queries the response was YES. [2024-06-21 18:39:22,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114763 conditions, 19792 events. 13718/19792 cut-off events. For 406203/406213 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 120304 event pairs, 4550 based on Foata normal form. 52/19835 useless extension candidates. Maximal degree in co-relation 114695. Up to 17168 conditions per place. [2024-06-21 18:39:22,479 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 213 selfloop transitions, 118 changer transitions 0/338 dead transitions. [2024-06-21 18:39:22,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 338 transitions, 4893 flow [2024-06-21 18:39:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:39:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:39:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-21 18:39:22,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 18:39:22,480 INFO L175 Difference]: Start difference. First operand has 147 places, 268 transitions, 3636 flow. Second operand 9 states and 228 transitions. [2024-06-21 18:39:22,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 338 transitions, 4893 flow [2024-06-21 18:39:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 338 transitions, 4840 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 18:39:23,220 INFO L231 Difference]: Finished difference. Result has 155 places, 290 transitions, 4331 flow [2024-06-21 18:39:23,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4331, PETRI_PLACES=155, PETRI_TRANSITIONS=290} [2024-06-21 18:39:23,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-06-21 18:39:23,221 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 290 transitions, 4331 flow [2024-06-21 18:39:23,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:23,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:23,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:39:23,221 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:23,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash 316592907, now seen corresponding path program 1 times [2024-06-21 18:39:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:23,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898211312] [2024-06-21 18:39:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:24,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898211312] [2024-06-21 18:39:24,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898211312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:24,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:39:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487809159] [2024-06-21 18:39:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:39:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:39:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:39:24,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:39:24,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 290 transitions, 4331 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:24,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:24,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:39:24,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:28,153 INFO L124 PetriNetUnfolderBase]: 13966/20159 cut-off events. [2024-06-21 18:39:28,153 INFO L125 PetriNetUnfolderBase]: For 442646/442667 co-relation queries the response was YES. [2024-06-21 18:39:28,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121267 conditions, 20159 events. 13966/20159 cut-off events. For 442646/442667 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 122977 event pairs, 4863 based on Foata normal form. 28/20168 useless extension candidates. Maximal degree in co-relation 121195. Up to 18519 conditions per place. [2024-06-21 18:39:28,341 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 264 selfloop transitions, 90 changer transitions 0/361 dead transitions. [2024-06-21 18:39:28,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 361 transitions, 5907 flow [2024-06-21 18:39:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:39:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:39:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 18:39:28,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 18:39:28,342 INFO L175 Difference]: Start difference. First operand has 155 places, 290 transitions, 4331 flow. Second operand 7 states and 196 transitions. [2024-06-21 18:39:28,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 361 transitions, 5907 flow [2024-06-21 18:39:29,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 361 transitions, 5663 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 18:39:29,326 INFO L231 Difference]: Finished difference. Result has 161 places, 317 transitions, 4789 flow [2024-06-21 18:39:29,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4789, PETRI_PLACES=161, PETRI_TRANSITIONS=317} [2024-06-21 18:39:29,327 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-21 18:39:29,327 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 317 transitions, 4789 flow [2024-06-21 18:39:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:29,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:29,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:29,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:39:29,328 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:29,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 165161517, now seen corresponding path program 2 times [2024-06-21 18:39:29,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:29,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446215570] [2024-06-21 18:39:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:29,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:30,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:30,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446215570] [2024-06-21 18:39:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446215570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:30,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:30,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:39:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478267754] [2024-06-21 18:39:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:30,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:39:30,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:39:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:39:30,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:39:30,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 317 transitions, 4789 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:30,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:30,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:39:30,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:34,437 INFO L124 PetriNetUnfolderBase]: 14132/20405 cut-off events. [2024-06-21 18:39:34,437 INFO L125 PetriNetUnfolderBase]: For 481344/481369 co-relation queries the response was YES. [2024-06-21 18:39:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126866 conditions, 20405 events. 14132/20405 cut-off events. For 481344/481369 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 124756 event pairs, 4851 based on Foata normal form. 32/20418 useless extension candidates. Maximal degree in co-relation 126789. Up to 18647 conditions per place. [2024-06-21 18:39:34,626 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 265 selfloop transitions, 95 changer transitions 0/367 dead transitions. [2024-06-21 18:39:34,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 367 transitions, 6139 flow [2024-06-21 18:39:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:39:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:39:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 18:39:34,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2024-06-21 18:39:34,627 INFO L175 Difference]: Start difference. First operand has 161 places, 317 transitions, 4789 flow. Second operand 7 states and 192 transitions. [2024-06-21 18:39:34,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 367 transitions, 6139 flow [2024-06-21 18:39:35,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 367 transitions, 6036 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-06-21 18:39:35,457 INFO L231 Difference]: Finished difference. Result has 168 places, 327 transitions, 5069 flow [2024-06-21 18:39:35,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5069, PETRI_PLACES=168, PETRI_TRANSITIONS=327} [2024-06-21 18:39:35,457 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-21 18:39:35,457 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 327 transitions, 5069 flow [2024-06-21 18:39:35,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:35,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:35,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:35,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:39:35,458 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:35,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash 553278394, now seen corresponding path program 2 times [2024-06-21 18:39:35,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:35,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572600642] [2024-06-21 18:39:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:35,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:37,016 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 18:39:37,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572600642] [2024-06-21 18:39:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572600642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:37,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:37,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:39:37,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922403818] [2024-06-21 18:39:37,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:37,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:39:37,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:39:37,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:39:37,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:39:37,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 327 transitions, 5069 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:37,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:37,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:39:37,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:40,933 INFO L124 PetriNetUnfolderBase]: 14277/20648 cut-off events. [2024-06-21 18:39:40,933 INFO L125 PetriNetUnfolderBase]: For 508236/508269 co-relation queries the response was YES. [2024-06-21 18:39:41,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127551 conditions, 20648 events. 14277/20648 cut-off events. For 508236/508269 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 126948 event pairs, 4876 based on Foata normal form. 74/20705 useless extension candidates. Maximal degree in co-relation 127470. Up to 18551 conditions per place. [2024-06-21 18:39:41,219 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 259 selfloop transitions, 118 changer transitions 0/384 dead transitions. [2024-06-21 18:39:41,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 384 transitions, 6165 flow [2024-06-21 18:39:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:39:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:39:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 18:39:41,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 18:39:41,221 INFO L175 Difference]: Start difference. First operand has 168 places, 327 transitions, 5069 flow. Second operand 9 states and 225 transitions. [2024-06-21 18:39:41,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 384 transitions, 6165 flow [2024-06-21 18:39:42,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 384 transitions, 5963 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 18:39:42,819 INFO L231 Difference]: Finished difference. Result has 176 places, 335 transitions, 5317 flow [2024-06-21 18:39:42,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5317, PETRI_PLACES=176, PETRI_TRANSITIONS=335} [2024-06-21 18:39:42,820 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-21 18:39:42,820 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 335 transitions, 5317 flow [2024-06-21 18:39:42,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:42,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:42,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:42,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:39:42,820 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:42,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1897768990, now seen corresponding path program 3 times [2024-06-21 18:39:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:42,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025714967] [2024-06-21 18:39:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:39:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:39:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:39:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025714967] [2024-06-21 18:39:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025714967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:39:44,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:39:44,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:39:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473080924] [2024-06-21 18:39:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:39:44,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:39:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:39:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:39:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:39:44,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:39:44,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 335 transitions, 5317 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:44,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:39:44,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:39:44,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:39:47,788 INFO L124 PetriNetUnfolderBase]: 14298/20656 cut-off events. [2024-06-21 18:39:47,788 INFO L125 PetriNetUnfolderBase]: For 523300/523331 co-relation queries the response was YES. [2024-06-21 18:39:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128275 conditions, 20656 events. 14298/20656 cut-off events. For 523300/523331 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 126370 event pairs, 4017 based on Foata normal form. 60/20699 useless extension candidates. Maximal degree in co-relation 128191. Up to 16489 conditions per place. [2024-06-21 18:39:48,192 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 223 selfloop transitions, 160 changer transitions 0/390 dead transitions. [2024-06-21 18:39:48,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 390 transitions, 6439 flow [2024-06-21 18:39:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:39:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:39:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 18:39:48,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2024-06-21 18:39:48,193 INFO L175 Difference]: Start difference. First operand has 176 places, 335 transitions, 5317 flow. Second operand 9 states and 227 transitions. [2024-06-21 18:39:48,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 390 transitions, 6439 flow [2024-06-21 18:39:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 390 transitions, 6196 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 18:39:49,255 INFO L231 Difference]: Finished difference. Result has 182 places, 337 transitions, 5513 flow [2024-06-21 18:39:49,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5513, PETRI_PLACES=182, PETRI_TRANSITIONS=337} [2024-06-21 18:39:49,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 127 predicate places. [2024-06-21 18:39:49,256 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 337 transitions, 5513 flow [2024-06-21 18:39:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:39:49,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:39:49,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:39:49,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:39:49,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:39:49,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:39:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 515856681, now seen corresponding path program 3 times [2024-06-21 18:39:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:39:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839053251] [2024-06-21 18:39:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:39:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:39:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat